H I -BOOK OFi bNERALS, FOSSILS,'RARE CHEMICALS, etc., FOR THE USE OF,dtool0, CollegeS, e i dtoiie, HOSPITALS, LABORATORIES, ASSAYERS, DENTISTS, PERFUMERS, CHEMISTS, DRUGGISTS, PHYSICIANS, &c., &c. IMPORTED OR MANUFACTURED BY No. 6 Barclay & 12 Vesey Streets, ea cc door WVVest tof th-e.Astor IHouse, v'E F YORK. SOLE AGENT FOR Ward's Plaster Casts, Trommsdorff's Pure Chemicals, &c., &c. 1872. PREFACE.' IN response to the oft repeated and urgently pronounced requests of my large and generous constituency, I have much pleasure in presenting my first Catalogue to the kind perusal of themselves and the public. From the nature of the work it will, I am sure, without any further proof, be admitted that a large outlay of money, and an immense expenditure of time, have been demanded. Very many of the illustrations now appear for the first time in this country, and most of the representations have been drawn from the objects themselves. The work has, consequently, been delayed far longer than was intended, and now, although the utmost care has been taken, I should not like it to be received as perfect. Doubtless some inaccuracies have crept in unawares, but these, I trust, will be found slight, and unimportant in character, and will, in consideration of the amount of work involved in the compilation, be gently criticized. The classification of the articles will be, as far as possible, alphabetical; and, for the further convenience of those using the Catalogue, an Index is added. In this the articles are, without any regard to their uses, arranged alphabetically, with a number annexed, which refers to the page upon which a description of the article may be found. It is well known that in apparatus which is imported, unimportant variations in form are always liable to be found. In this respect, it will always be my endeavor to secure the style which shall contain the latest improvements, and be the most effective in operation. My bottles are all made on my own forms, and I can confidently give a guarantee that every article named in the following pages will be in every way as represented. In conclusion, I beg to thank those who have so generously supported me in the past, and to express a hope that this work will be Tound useful in our laboratories and factories, and indeed in the hands of any person who may refer to it. E.. B.B. 10 BARCLAY ST., N. Y., JulU, 1872. ERRATA. During the printing of this book the following prominent errors were discovered: On page 6, No. 1252, for $3.50 read $5.50. " 21, " 1431, in nests of 1-12, per nest, $4.50. " 23, " 1453, pints, 90c. 1476, price $35.00. 1482, ".15. 1483, ".30. 27, " 1501, for 22 oz. read 32 oz. " 28, " 1515, strike out 3 and 6 oz. sizes.. 1515 a, Boh. top stopper, prices 20 per cent. less than 1515.' 30, " 1528, 2 glls., $2.25. Pages 35 to 38, 20 per cent. reduction on those made here. On page 40, No. 1670, for $1.00 read $1.50. " 49, " 1780, should read $40.00. " 52, " 1801, for.75 read $1.75. " 52, " 1806, " drip read dip. 52, " 1810, should read unmounted instead of mounted. " 53, " 1815, for frictional read fractional. 56, " 1869, prices are per dozen instead of single. " 59, " 1890, should read perf. cover for gas reduction tube. " 63, " 1948, 50 cc, for $1.40 read $1.50. " 100 " " 2.00 " 2.25. " 200 " " 2.25 " 2.50. " 250 " 2.50 " 3.00. 63, " 1952, for gramme read cc., and for the prices $1.00, $1.15, and $1.25 each. " 65, " 1975, is of the new form having a glass shelf to support the triangle. " 69, " 2024, X gall., $10.00. " " " 2025, 1 " for $14.00 read $16.00. " " " " 2 " " 19.00 " 20.00. " 72, " 2024, the price is $20.00. " 75, " 2079, for $9.00 read $6.00. " 77, " 2120, " Tangent read Coulomb Torsin " 79, " 2142, " $6.00 read $5.00. 83, " 2177, should read $5.50 to $9.00. " 91, " 2253 a, Filter Patterns, per set, 60o. - *2, " 2276, 1 oz. single piece. 10e. " 2 " " " 12c. "i 4 "' "1 1!c. " 6" " " 20c. " 8 " " " 25c " 12 s", " 27e " 16 " " 30e. " 24 " " 35e. " 32" " " SOe. " 93, " 2280, 4" " " 25c. 8" " " 30c. " 16 "I I, " 40c. " 32 " " " 60. U 94, " 2301, instead of German silver point read MUe onD i " 96, " 2323, " 1 oz. read 8 oL. " " 18" L 16" " 2353, read $1.25 for 75c. On page 102, No. 2365 a, Fletcher's gas furnace, 50 burners, for smelting iron and other metals, $30.00. " 103, " 2375, read $45.00. " 104, " 2382, strike out x gall. size. " 106, " 2397, for $7.50 read $9.50. 112, " 2458, " $35.00 read $30.00. 119, " 2557, " actual measure read actual measures. 121, " 2586, " $1.50 read $2.50. " 123, " 2604, " 3.00 "' with swivel, $4.50. " 125, " 2635, " guaged read gauged. " 126, " Illustration No. 6241 read 2641. 127', 2644, strike out words and wire. "c 2645, " ditto under and wire, and for $3.25 read $3.75. " 127," 2647, for 10 in., $2.50 read $2.00. 2648, 1" $4.00 read $5.00. " 128, " 2675, the price is $2.00. 129, " 2693, for $2.50 read $3.00.' 136, " 2838, " $1.50 to $2.50 read $2.50 to $5.50. 139, " 2890, for.75 read $1.75. " 145, " 2953, read $1.75. " 2954, " 2.50. 2955,,' 4.00. " 148, " 2993, for $1.50 read $2.00. " 2994, " 1.50 " 2.00. 149, " 3001, prices are per dozen and not per single piece. 3002, " " " " "' 152, " 3040, 1 pint, $3.50. 153, " 3057, for $9.00 per lb. read $5.00. " 159, "' 3147 a, Spoons, Blowpipe, of ivory, each 40c. 160, prices of stop-cocks reduce 20 per cent. 165, No. 3227, for $1.50 read 75c. "- 169, " 3304, 4.00 " $3.50. " 169, " 3306," 4.00 " 10.50. " 170, " 3318 a, Tips, Blowpipe, brass, each 10c. t" "6 b?, " " solid platinum, each 75e. " 171, " 3343, for $1.00 read $100.00.' 171, " 3344, " 50c. read40c. " 177, " 3401, the price is $2.00. 177, " 3408, 6 in., $5.50 per dozen. 181, Chemicals, see new price list. 207, No. 3477, for $7.00 read $10.00. " 3478, " 12.00 " 15.00. 207, " 3479, " 3.00 " with swivel, $4.50 211, " 3485, read series of nine minerals and strike out No. 10.Diamond. " 211, " 3488, for $6.00 read $10.00. " 214, " 3504, " 10.00 " 12.00. " 215, " 3505, " 10.00 " 15.00. " 215, " 3506, " 15.00 " 20.00. " 241, " 3593, " 4.00 " 6.00. " 250, " 3667, " 2.50 " 7.50. " 253, Chemicals, list of, for 101 read 181. 259, "'Lippincott's paper index, for 77 read 177. N B.-Prices R. B. Crucibles and Evaps. have advanced; American made goods have declined. E. B. BENJAMIN, 10 Barcday Street, N. r. I/terCt'tiortil ~xtibitio.~, PHILADELPHIA, 1876. F I R S T P R EM IU ITi 10 aarclny Streeat,-j ARDED FOR AWARDED FOR "Fxxefetteci of Tkign and 2imi4 in ni3micat Appxtalt and YUtt1ity and a oit# f Ce ieatXs. NOTICE. THE " Albertype" of a portion of my lower show-room, exlibited in.the front of this Catalogue, was prepared by Mr. E. Bierstadt, of this city, expressly for this work. The prices placed against the several articles in the following Catalogue are for United States legal tender, and are arranged upon so low a scale that net cash payments will be required for single pieces, except when otherwise agreed. These prices are, of course, subject to alterations, according to the values of crude materials and labor, and to the fluctuations in the foreign markets. For example, I am already advised of a prospective advance on Becker's balances and weights at the beginning of 1873, amounting to about 10 per cent. on his prices in this catalogue. The charges of packing and shipping must, of course, be borne by the purchaser; and, in the case of chemicals, unless otherwise directed, these will be put into bottles and suitable packages, the expense of which will be added to the cost of the materials themselves. Damages occurring by breakage or otherwise, in transitu, are never entertained in this business, nor can claims for deductions of any kind be allowed, unless notice of the same be given wv-ithin six days of the receipt of the goods. In every case the signed receipt for articles in good order will relieve the supplier from all responsibility. In ordering goods, it is desirable that full shipping directions be given, as otherwise the selection of route will be considered as left to my own discretion. The fullest description of goods is also solicited, particularly when (as may be done) reference is made to any well known foreign catalogue. Having engaged the vervices of an experienced glass-blower, numerous styles of small apparatus, not specified in this Catalogue, can be well and expeditiously manufactured. When such are required, it is necessary that the directions contain carefully prepared drawings and accurate dimensions. All kinds of apparatus can be carefully and accurately repaired on the premises by experienced workmen. Valuable apparatus, imported specially to order, for moderate terms, on commission. When such are imported for scientific institutions, they are free of duty. The large outlay of money incident to the publication of this work compels me to make a charge of $1.50 for each copy. This will partially cover expenses, and will, I am sure, be cheerfully paid by any who desire to consult the work. E. B. B. ii r ia ll IT 1 1 I;,!,': i' I:rl 111 3l Enrteredl according to Act of Congress, in the year 1872, By E. D~. BENJAMIN, In the office of the Librarian to Congress, at Washington, D. 0. CATALOGU E. FOR numbers 1 to 1,248 reference should be made to the Catalogue of Dr. II. A. WARD'S Casts of Fossils. This collection contains accurately formed models, and embraces all that has been discovered in reference to the Animal Kingdom, in its various subdivisions of Vertebrates, Articulates, Mollusks, Radiates, and Protozoans. Full descriptions will be found in the Catalogue, which, as a work of reference, should be in everybody's library. Dr. Ward having paid me the compliment of making this establishment a special, and indeed, independent of his factory, the only dep6t where his casts can be obtained at the manufacturer's prices, orders are earnestly solicited for these valuable additions to cabinets and college coll ctions. The specimens are well arranged and classified for inspection, and can be supplied singly or in series. Special attention is called to these casts, and a cordial invitation is extended to all who may feel a desire to inspect them. The extraordinary energy and ability displayed by Dr. WARD, in securing and collecting, from the most reliable sources, these remarkable specimens of past ages, is undoubtedly entitled to the warmest encouragement and earnest support on the part of his fellow countrymen. His depots, established in London, and on the continent of Europe, are already giving him important evidence of the appreciation in which the people of those countries hold his successful endeavors for the advancement of science, and it is earnestly hoped, and indeed confidently believed, that as soon as it shall be generally known that a dep6t has been established here, the people of the United States will also extend to the Doctor substantial tokens of their approbation. Professor OWEN, in his popular work on a National Museum of Natural History, says: "A fossil bone, and a colored plaster cast of it, are not distinguishable at first sight-scarcely by sight at all. The artificial junction of a series of casts of the bones of an unique 6 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE fossil skeleton, produces a result equivalent, for all the purposes of public exhibition, to the articulated skeleton itself. Thus, every capital in Europe, the public museum of each civilized community, may show to the people the proportion of the creatures of former worlds, that science has so restored." PRICES IN CURRENCY. 124-8A.-Absorptiometer, Bunsen's, for measuring the absorption power of gases. *50.uO 1249.-Acetometer, Otto's, of glass on wood foot, for indicating the per centage of anhydrous acid in vinegar, acetic acid, &c.; graduated 0 to 12 in fourths. $1.50 1250.-Ateetometer, accompanied with hydrometer for liquids lighter than water, thermometer, and two ground stoppered 1252 1253 1248A bottles, one containing test solution, the other solution of litmus, complete in leather case. $4.00 1251.-Acidimeter, according to Fresenius, for testing nitric acid..60 1252.-Acid Anhydrous Phosphoric. Apparatus for burning phosphorus in oxygen. $3.50 OF CHEMICAL AND PHYSICAL APPARATUS. 7 1253.-Acid Bottle, French, having an extra tight ground stopper, extending to the bottom of the bottle, especially used for testing coins, minerals, &c. 1 2 oz..25.30.35 each. 1254. —Acid or Cobalt Bottles, of Bohemian glass, having long stoppers, covered with ground caps. i 1 2 4 oz..50.63.75.90 each. 1254 1255.-Acid Brushes, of fine spun glass. Each,.50 1256.-Acid Carbonic, liquified under low temperature, in sealed glass tubes, enclosed in velvet-lined leather case. $7.50 1257.-Acid Carbonic, apparatus, Dr. Scheibler's, for determining the quantity of carbonic acid in bone ash. $35.00 1258.-Acid Carbonic, apparatus; the same as above, American. $25.00 1259.-Acid Carbonic. Dr. Scheibbler's new apparatus for quantitative volumetric analysis of carbonic acid, $45.00 1260.-Acid Carbonic, generator, with lead tripod. 11 inches high,... $9.00 14 ".... 12.00 1261.-Acid Carbonic, generator, French make, very strong and heavy, with extra tubes, cocks, &c. $25.00 1'262 1257 1262.-Acid Dishes, of Meissen porcelain, for freezing in vacuo, &c., with three partitions, five inches. Each, $1.25 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1263. — Acid Dishes, of Berlin porcelain, with six partitions. 41 5~1 6~ in. $1.15 1.30 1.50 each. 1263 1260 1264 1264.-Acid Dishes, of glass, plain, on three feet. 3 31 3 in..50.60.75 each. 1265.-Acid Hydrochloric apparatus, IHoffman's, for decomposition of Hydrochloric acid into hydrogen and chlorine, mounted on stand. $6.00 1266.-Acid Hydrochloric. The same apparatus as above, but unmounted. $2.50 1267. —Acid Hydroehloric apparatus, IHoffman's, unmounted, for showing that the gas evolved from this acid contains equal volumes of chlorine and hydrogen. $3.00 1268.-Acid Jars, for preparing test solutions in volumetric analysis, 1000 grains. $2.25 1269.-Acid Jars, accurately graduated, with double numbers, which can be read up or down. 100 200 300 400 500 1,000 C. C. in. 1 2 2 5 5 10 $2.00 2.50 3.00 3.50 3.75 4.00 each. 1269 1270.-Acid Jars, on brass foot, registering 0 to 12. Each,.75 1271.-Acid Measures, of porcelain, with lip. 2 4 8 16 32 oz..30.50.90 1.50 1.80 each. OF CHEM3ICAL AND PHYSICAL APPARATUS. 9 1272.-Acid Measures, of gutta-percha, conical, capacity 1 litre. Each, $2.00 1273.-Acid Measures, cylindrical glass. 1 litre, 2 litres, $3.00 3.50 each. 1274 1274.-Acid Sulphuric, apparatus for making. $3.00 1275.-Acid Phosphorus, apparatus for making. $2.50 1276.-Acid Pipettes, with rubber ball..75 1277.-Acid Syphon, of glass, with suction tube. 9 12 18 24 in..35.40.60.75 each. 1278. —Acid Syphon, with Mohr's spring clamp, glass tip, and gutta-percha connection. Each size add.50 1279.-Acid Syphon, of glass, with suction tube and glass stop-cock, instead of Mohr's spring clamp, 18 in. $1.50 1280.-Acid Syphon, of glass, with delivery tube united by 1277 1281 1282 rubber. $1.50 1281.-Adapters, French, bent, with ring around the larger end. 1 2 4 8 oz..08.10.15.25 each. 10 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1282.-Adapters, French, straight, with ring around the larger end, 16 oz. capacity. Each,.50 1283.-Adapters, of Bohemian glass, bent for connecting retorts with receivers, width at larger end. 1 ~ 21 2 ~ 3 in..30.35.50.70 each. 1284.-Adapters, straight, of Bohemian glass, 1.-} 21 2-~ 3 in..25.30.45.65 each. 1285.-Adapters, of Bohemian glass, 5 feet long. Each, $2.50 1286. —Adapters, of vulcanized rubber, 10 inches long. Each,.50 1287.-Agate Slabs, with mullers, highly polished, for grinding into fine powder materials and minerals requiring careful investigation. 5 58 51 6 A6 61 in. sq. $12.00 15.00 19.00 22.00 25.00 each. 1288.-Air Cylinders, apparatus for $12.00 1289.-Air Globes for weighing Gases. 1 2 3 gall. $1.25 2.00 3.00 each. 1290.-Air Thermometer Tubes, bulb 2 in. dia. Each,.25 1291.- " " " 3 inches. ".50 1292.-Alcoholometry. Dr. Pyle's Book, containing tables with calculations for estimating true alcoholic per centages according to McCulloch..75 1293.-Alcoholometers, U. S. Standard, in chamois-lined leather cases, with thermometer scale on hydrometer, and extra thermometer, comprising (with the book above referred to) the complete apparatus for dealers in proof spirits, &c., according to U. S. C. standard for exact estimates. Each, $7.00 1294.-Alcoholometers, Tralles & Richter's, in leather cases. Each, $3.50 1295.- " " " in chamois-lined leather cases, with jar and thermometer. Each, $6.00 1296.-Alcoholometers, Tralles's, with jar and thermometer, in chamois-llned leather cases. Each, $5.00 1297.-Alcoholometers, U. S. Standard, with thermometer attached, and most accurate proof scales in paste-board cases. Each, $3.00 OF CHEMICAL AND PHYSICAL APPARATUS. It 1298.-Alcoholometers, U. S. Standard, Tralles & Richter's scale, with thermometer, as above. Each, $2.20 1299.-Alcoholometers, without thermometer, in round, pasteooard cases. Each, $1.00 1Vi0.-Alcoholomneters, Gay Lussac's centesimal scale, in pasteboard cases. Each, $1.50 1301.-Alcoholometers, Gay Lussac and Cartier's, in tin boxes. Each, $1.00 1302. " graduated 15 to 95, No. 204. Each,.50 1303.- " Cartier's, French, in round cases. Each,.75 1304.- " French, in pasteboard boxes, graduated 0 to 40; very delicate and correct instruments. Each, $1.25 1305.-Alcoholometers, French, in tin boxes, graduated 10 to 40 Each,.50 1306. — " in tin cases, smaller size (No. 1,093). Each,.25 1307.-Alcoholometer Jars, with glass feet, according to size. Each,.50 to.75 1308.- " " with brass feet. Each,.90 1309.-Alembics, glass, Bohemian, with loose head and tightly ground j oin3. 8 oz. Pints. Quarts. $1.30 1.80 2.50 each. 1:309 1313 1310.-Alemibics, glass, German, with fast heads, tubulated quarts. Each, $1.50 1311.- " porcelain, with loose heads, 12 oz. " $1.50 12 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE 1312. — Alembic s, Salleron's, for testing wines and saccharine alcoholic liquors, with heating apparatus. Each, 15.00 1:1313.-Aleinbic, Salleron's, for testing the quantity of alcohol in wine and spirits. Large size. $25.00 1314.-Alembic Stoneware, for sublimations, &c., all sizes, from $;3.00 to $7.50 1315 1316 1317 1315.- Apparatus, for the determination of carbonic acid in carbonates, Wetherell's form. Each, $1.25 1316.- Fresenius &Wills's form (No.450) Ea..65 1317.- " Berzelius's " ( " 498) ".75 1318.- Rose's (- " 460) " 1.25 1318 1321 1322 1324 1325 1319.- ~C Mohr's form (No. 503) Ea. $1.25 1320.- " Fresenius's "c ( 451) ".75 1321.- " Schriidtter's ( 456) " 2.00 1322.- " Geissler's " ( " 455) " 1.50 1323.- "C Fresenius's new form (" 452) " 1.50 1324.- " Schaffner's " ( " 453) ".75 1325.- " Kipp's " ( " 462) " 1.75 1326.- " Kipp's " ( " 461) " 1.75 1327. — " ( " ( 464) " 1.65 1328.- " Mohr's " ( " 467) " 1.50 OF CHIEMICAL AND PHYSICAL APPARATUS. 13 1329.- Apparatus, Erdmann's new form (No. 465) Ea. $1.50 3:29A. —. " Bunsen's " 1.75 1329 1329A 1333 1334 1335 1330.-Alkalimeter,.Descroizille's, ofglass, mounted on wood foot graduated from 0 to 100, in ones. $2.00 1331.-Alkalimeter, Molir's, with glass foot, graduated, 0 to 100. $1.75 1332.-Alkalimeter, Ur'as, with glass foot and stop-cock, and channel stopper for pouring liquids. $2.00 1333.-Alkalimeter, Leslie's, with glass foot, cork-stopper, and two pipette tubes. $1.50 1334.-. Dtto, Descroizille's, on glass foot, graduated 0 to 100. $1.50 1335.- " Gay Lussac, with wood foot. 25 c.c. 50 c.c. 100 c. c. $1.75 2.25 2.50 each. Alkalimeters not mounted on stand. See Burettes. 1336.-Ammonia. Hoffman's apparatus for decomposing ammonia. $6.00 1337. —Ammonia. Apparatus for ascertaining the exact proportions of hydrogen and nitrogen in ammonia. Unmounted, $3.00 1338.-Ammonia carboys, for concentration of the stronger acids and ammonia, 2 necks, with delivery tube, German, glazed outside, of 200 litre capacity. $50.00 1339.-Ammonia carboys; two of the above, including connection. $100.00 14 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1346 1339 1351 1340.-Ammonia Chloride, apparatus for illustrating the formation of Chloride of Ammonia, by condensing the vapors of hydrochloric acid and ammonia. This consists of a gallon glass flask, to which are attached two tubes by means of an Indiarubber connection. $2.50 1341.-Annealing Cups, of porcelain..25 1342. —Ditto, of porous clay. Per doz., $2.50 1343.-Analysis, apparatus for organic analysis, according to Liebig, complete. $45.00 1344.-Anvils for Blowpipes, small, with square ends. Each,.75 1345.-Ditto, large. " $1.0) 1346.-Ditto, round, with hammer, etc., complete. " 10.00 1347.-Aphlogistic or Flamleless Lamp, with platinum sponge and glass wick-holders. Each,.75 1348.-Aphlogistic Lamp Sponges, with glass wick-holders. Each,.40 1349.-Arsenic, Marsh's apparatus for the detection of, unmounted. Each,.50 1350.-Ditto, mounted. $4.25 1351.-Ditto, brass stopcocks for the above. Each, $1.25 1352.-Ditto, Fresenius's apparatus for the detection of. 5.00 1353.-Ditto, Mitscherlich's ditto. 3.00 1354.-Arsenic Plates, plain. No. 000 00 0 1 2.12.15.25.30.40 each. OF CHEMICAL AND PHYSICAL. APPARATUS. 15 13.~2 1357 1355. —Arsenic Plates, Meissen, with Lips. Small, medium, large..35.40.50 each, 1356.-Arsenic Tubes, five different forms. Per doz.,.50 to.75 1357.-Ditto, three kinds for sublimation. Per doz.,.7 1358.-Aspiration Apparatus, consisting of three bottles, mounted, in box, with suction and delivery tubes for inhaling the vapor of medicinal solutions. $2.00 1359.-Ditto, ordinary. 1.50 1360.-Aspirators, of glass, with brass stopcocks. Quarts, ea. 2.00 1361. —Ditto, ditto, ~ Galls. " 2.50 1362.-Ditto, ditto, Galls. " 3.00 1363.-Ditto, Liebig's. Each $1.50 to 2.50 1364.-Ditto, of glass, with glass stopcocks. Litres i 1 2 4 8 $3.50 3.75 4.75 6.25 9.50 ea. 1365.-Aspirator Tubes. Each,.50 Assay Apparatus, for the various articles used in assaying, such as basins, bellows, blowpipes, crucibles, covers, cupels, dippers, roasting dishes, flasks, hammers, ingot moulds, muffles, scoops, stopcocks, tongs, &c. See their respective alphabetical positions. 1366.-Atomizers, of glass. Each,.25 1367.-Attachments, brass, for blowpipes. ".75 1368.-Atropia Bottles. ".50 1368 16 E. B..BENJAMIN'S DESCRITI.VE CATALOGUK'9 H. TROEMNER'S STANDARD BALANCES. 1369. —Assay Balances, in French polished glass case, beam resting on agate bearings. Sensible to L milligramme. $55.00 1370.-Ditto, ditto. When loaded up to 1 gramme _:- 1 =: in each pan, needle dei ( _| viates 10 divisions on the scale for one milligramme; T- part of a 1369 Inilligramme is therefore to be seen. Steel knives witli agate bearings. $75.00 1371.-Ditto, ditto, for up to 10 grammes in each pan. - 75.00 1372. -Ditto, ditto, in French polished glass case. Is arranged with rider apparatus and pan arrests. Open beam, divided in! milligramme; beam resting on agate planes. Needle shows ten divisions for one milligramme. $80.00 1373. -Analytical — 7-4 Balance, in French polished mahogany I IA case, with counterpoised sliding door. Capacity 100 grin., sensible to' - grm. Steel bearings, movable 3- in. pans, 10 in. beam. I.... I -, ~ $40 00 1374. —Ditto, ditto, has attachment for 1375 rider, and pan arrests. Beam graduated to one milligramme. $50.00 OF CHEMICAL AND PHYSICAL APPARATUS.- 171-375.-Ditto, ditto, in fine polished glass case, capacity 100 grammes in each pan. Beam divided in half parts of milligrammes. - Sensible to -i milligramme, with apparatus for specific gravity. All bearings agate. 2[ in. pans, 12 inch beam. $86.00 1376. —Ditto,: ditto, all bearings and planes agate. $96.00 1377. — Ditto, ditto, capacity 200 grammes in each pan, in fine polished glass case, beam divided in Ad milligramme, sensible to -i milligramme. All agate bearings, with improved arrest for pans, and apparatus for specific gravity, &c., &c..3 in. pans. Beam 14 in. v,; $105.00 1378. —Ditto, ditto, all bearings and planes agate. 115.00 1379.-Coin Scale, for least current coin, in French polished glass case, with counterpoised sliding doors, 7- inches beam, sensible to:1th grain. $24.00 1380.'-Weights $20 piece to $1, adjusted to the least Current Standard, in velvet lined box. $6 00 1381.-Specific Gravity:Scale.-Constructed after the plan of Dr. Mohr.: 20.00. 1382.-Chemical Scales, for general weighing, on polished box, with drop lever, especially constructed for laboratory use. Including weights. Diam. of Pan. Beam. Capacity, Price. 5 in. 9 in. 32 oz. $15.00 1383.-4 " 8 " 16 " 12 00 1384. —3' 8 e" 10.00 1381 Pans can be suspended by chains if desired. 1385. —Analytical Scales, for weighing Ores, Minerals, Gold and Silver Coin, Jewelry, Chemicals, &c., &c. On fine polished mahogany box, with drawer. Lacquered-beam, with box ends, movable pans, ivory indicator. -Sensible to ofV grain. Price _ does not include weights. 1385 Length of Beam. Diam. of Pan. Capacity. Price. 14 in. 6 in. 25 oz. $24.00 1386.-Do. 10 " 41A" 16 " 18.00 1387.-Do. 8 " 3" 8 " 15.00 Pans can be suspended by chains if desired. 18 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1388.-Students Balance, in polished mahogany case, sliding front counterpoised. Improved apparatus for raising beam. Beam, 72 in.; pans, 21 in. diameter. Loading 50 grms. and sensible to Tith. $26.00 1389.-Prescription Scales, on polished mahogany box, with marble top. Ebony mouldings. With weights. Pans. Brass. Nickel Plated. 22 in. $12.00 $14.00 1390.-Do. 2 " 14.00 16.00 1391.-Do. 3 " 16.00 19.00 1392. —Gold Scales. For Jewelers, Brokers, &c. Finely finished scale, on polished mahogany box, with drawer. Very accurately adjusted. Weights included. Length of Beam. Diam. of Pans. Weights. Price. 12 in. 6 in. 64 oz. $25.00 1393.-Do. 9" 5 " 32 " 15.00 1394.-Do. 8" 4 " 16 " 12.00 1395.-Do. 7 " 3 " 8 " 10.00 1396.-Jeweler's Balance. Glass case, 35 inches high, 32 inches wide. Very superior balance, of the finest finish. Has open beam, 8 in. movable pans, capacity 200 oz. in each pan. Sensible to I grain when loaded. Case of French polished mahogany, with counterposed sliding door. Price includes a set of weights, 50 oz. to 1 grain (125 oz. in all), which are neatly fitted in the drawer of case. $85.00 Same balance, with weights from 100 oz. down. 90.00 1397.-Bank Specie Balance. Balance on polished mahogany platform, with glass level and levelling screws; beam, 22 inch, provided with extra pan and balance weight. Capacity, $500 silver or $5,000 gold at a draft; sensible to one grain when loaded. Price does not include weights. $90.00 1398.-Do. Same balance, in a glass case of polished mahogany, with counterpoised sliding door. $120.00 1399.-Balances for Druggists and Assayers, " weighing in," on marble slab, carefully adjusted. Each, $15.00 1400.-Ditto, ditto, wooden foot and drawer for tools and weights. Each, $10.00 1401. —Ditto, of horn, with beam. Pans.-Size, 3 32 4 in. Price, $2.50 3.50 4.50 each. OF CHEMICAL AND PHYSICAL APPARATUS. 19 1400 1401 1405 1411 1403.-Balloons, of Collodion, extremely light and thin, for ascension, with hydrogen gas. Size, 10 12 in. Price,.75 $1.00 each. 1404.-Balloons, French Rubber. Each,.75 1 405.-Ditto, Goldbeater Skin, from $1.50 to $5. (These balloons, when not in use, should be kept in a close package, with a little camphor, to preserve them from insects. They should never be wetted.) Balloons, of Glass. See Air Globes. 1406.-Barometer, for use in schools, usual form, from $3 t.o $15. 1407.-Barometer, Bunsen's Syphon, graduated on both branches in millimeters, filled. $12.00. 1408.-Barometers, Aneroid, accurately adjusted; 1407 same as used in the University of Vienna. Each, $30.00 1409.-Ditto, with Storm Glass. The rising of the milky substance indicates approach of storm. Each, $3.00 1410.-Barometer Tubes, 3 feet in length, sealed at one end..50 1411.-Ditto, with bulb, for use with mercury. Each,.75 1412. —Ditto, including the mercury. " $1.25 1413.-Barometer Bulb Tubes. c".50 Basins and Dishes. See Crystallizing and Evaporating Apparatus. 1414.-Basket of Lead, for holding pieces of zinc in hydrogen generators. Each,.50 Batteries. See Electrical Apparatus. Baths, Eye, see E. 1415.-Beakers, of the very best Bohemian glass, thoroughly annealed, and of uniform thickness, for enduring extremes of :'20 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE temperature, of Berzelius's usual form, in nests of 00 to 1, containing 1 to 3 ounces. Per nest,.20 1408 -PE NEST. 1416.-Beakers, in nests of 4,-00 to 2, containing ~ to 4 ozs..35 1417.-Ditto, ditto, 3, —1 to 3, " 3 to 6 ".40 1418.-Ditto, ditto, 5,-0 to 4, " 1~ to 9 ".65 1419.-Ditto, ditto, 5,-1 to 5, " 3 to 15 ".75 1420 —Ditto, ditto, 6,-0 to 5, " 1 to I5 ".80 1421.-Ditto, ditto, 7,-0 to 6, " 14 to 21 " $1.10 1422.-Ditto, ditto, 9,-0 to 8, " 1~ to 48 " 2.00 1423.-Ditto, ditto, 10, —0 to 9, " 1 to 70 " 2.25 1424.- Ditto, ditto, 13,-0 to 12, " 1 to 140" 4.00 (The capacities are approximate only.) 1425.-Ditto' ditto, (singly). The capacities below, and dimensions, are approximate: NOS. IIEIGHT. WIDTII. CONTENTS. PRICE, EACH. 0 2 inch. 1+ inch. 1~1 ounce.06 1- 2 do. 14 do. 3 do..09 2 3 do. 1j do. 4 do..12 3 3] do. 2 do. 6 do..16 4 4 do. 21 do. 9 do..20 5 41 do.' 25 do. 15 do..25 6 5~ do. 3 2do. 21 do..35 7- 63 do. 31 do. 33 do..40 8 71 do. 3~ do. 48 do..45 9 8~ do. 4 do. 70 do..55 10 94 do. 44 do. 8. s do..65 11 10 do.,5 do. 110 do..75 12 11 do. 54 do. 140 do..90 1426.-Beakers, tall and narrow; French form, very thin, 8 in a nest. Nos. 1 to 8. Price per nest, $3.50 oF CHEMrICAL AND PHYSICAL APPARATUS. 21 1419 1422 1424 1426 1435 NOS. HEIGHT. j WIDTH. CONTENTS. PRICE, EACH.:1 2i inch. h1 inch. 1~ ounce..25 2 3 do. 2 do. 2 do..30 3 41 do. 2 do. 4 do..40 4 5 do. 24 do. 6 do..50 5 6~ do. 3 do. 16 do..60 6 8 do. 3~ do. 24 do..70 7 9~ do. 4 do. 32 do..80 8 10 do. 4~ do. - gal. 48 oz. $1.00 l42 7.-Beakers, best Bohemian Glass, Berzelius's form, extra wide nests, from Nos. 1 to 6, same size as Griffin's lipped, full nests. Each, $1.75 1428. —Ditto, very large, Nos. 10 to 13, nests of 4. " 3.50 1429. —Ditto, full nests of 15,-00 to 13. " 7.00 1430.-Ditto, singly. Each,.15 to 2.00 1431.-Ditto, Griffin's wide form, lipped. NOS DEPTHII. WIDTH. CAPACITIES. PRICE, EACH. 1 3 inch. 2 inch. 5 ounce..15 2 3~ do. 2- do. 8 do..25 3 4 do. 3 do. 12 do..30 4 4~ do. 32 do. 20 do..35 5 5 do. 3- do. 25 do..40 6 5S do. 4~ do. 40 do..55 7 6, do. 4~ do. do..60 8 74 do. 5 do. do..70 9 8~ do. 5' do. do..80 10 9d do. 61 do. do..90 11 91 do. 6- do. do. $1.00 12 10 do. 7 do. do. 1.10 1432. —Beakers, ditto, ditto - nests of 3,-1 to. 3. Each,.60 ~22 ~E. B. BENJUAMIN'S DESCRIPTIVE CATALOGUE 1437 1438 1441 1442 1443 1433.-Beakers, Griffin's wide form, lipped, nests, 4,-1 to 4, ea..95 1434.-Ditto, 5, —1 to 5. Each, $1.35 1435.-Ditto, 6,-1 to 6. " 2.00 1436.-Ditto, glass, flat bottom, perpendicular sides, without rim, shallow (from 2 to 2- inches deep), -nests of 4, small. Each,.75 1437.-Ditto, nests of 9. " $2.00 1438.-Ditto, tall conical, with lip, 8 ounce capacity. ".50 1439.-Ditto, porcelain, egg shape, flaring mouth, useful in dlssolving metals and acids. Each,.30 1440.-Beale's Qu:ck Filter..75 1441.-Beehive, shelves. Small, 25c.; large, 7-c. 1442.-Bell Glasses, flat knobbeld. 6 inch. 8 inches diameter. $1.25 1.75 each. 1443.-Ditto, swelled, with knob. i 1 2 gal. $1.50 2.00 3.00 each. 1444.-Ditto, open tops. 1 - 2 gal. $1.75 2.50 3.50 each. 1445.-Ditto, French, knobbed, tall. pints. quarts. 1 gal..30.60 $1.00 1.50 each. 1446.-Ditto, American, tall. pints. quarts. 1 3 5 gal..40.75 $1.00 1.50 3.75 7.50 each. 1447.-Ditto, French, tall, with foot, made to be reversed, for use with light and heavy gases or fluids, vase form. 1 I 2 gal. $1.50 1.75 2.75 each. 1448.-Ditto, American, with small foot. II1 11 2 gal. $1.25 1.50 1.75 2.50 each OF CHEMICA.L AND?IfYSICAL -APPARATUS. 23 1444 1445 1449 1451 1452 1453 1456 1449.-Bell Glasses, tall, wide open top. pints. quarts. 1 gal..50.75 $1.00 1.50 each. 1450.-Ditto, with glass plate on top, extra. Each,.25 1451.-Ditto, open mouth, for caps. quarts. 1 gal..75 $1.00 1.50 each. 1452.-Ditto, with brass cap and stopcock. quarts.;i gal. $2.25 2.75 3.25 each. 1453. —Ditto, accurately stoppered with fine ground emery. quarts 2 1 gal. $1.00 1.50 1.75 each. I 454. —Ditto, 16 oz., with hole in stopper, large enough to introduce a tube.,.75 1455.-Ditto, for hydrogen lamps, 8 oz. ".35 1456.-Ditto, open mouth, with tubulature at bottom, for use with Bunsen's pump. pints. quarts. $1.75 $2.25. each. 1457.-Ditto, with heavy emery ground mirror glass plate for the bottom. pints. quarts. *2.75 3.25 each. 1458.-Ditto, Bohemian, having the base stoppered with large ground glass stopper, cut and polished on the bottom. 4 8 16 32 oz..30.50.75 $1.00 each. 1459.-Ditto, open top, graduated in cubic centimetres. 500 1,000 2,000 2,500 cc. $2.50 3.50 5.25 5.50 each. 24 E. B. BENJAMIIN'S DESCRIPTIVE CATALOGUE 1462 1463 1465 1464 1465 1473 1474 1460. -Bell Glasses, with cap and brass cock fitted. 500 1,000 2,000 2,500 cc. $4.00 5.00 6.75 7.25 each. 1461.-Ditto, fitted with glass globes, with brass cap, stopcocks, etc., 1 gal. Each, $6.00 Bell-Shaped Gasometers. See Gasometers. 1462. —Bellows, hand. 6 8 inch..75 $1.00 each. 1463. —Ditto,- double action blast, for use with the foot. single air receiver. double. $4.00 6,00 each. 1464. —Binding Screws, for connecting poles of Batteries, fancy styles. Each,.50 1465.-Ditto, for connecting poles -of batteries, plain. ".25 1466. —Biinding Clamps, for Smee's batteries. ".75 1467.-Ditto, for Bunsen's smaller battery. Per sett,.75 1468.-Ditto, for Bunsen's larger battery. " 1.25 1469. —Bladders, hogs'. Each,.10 1470.-Ditto, with —brass~neck. ".60 1471.-Ditto,-with stopcock and plain bubble pipe. " $2.50 T-472.-Ditto, for exploding gases. " 1.00 1473. — Bladder Pieces.' ".50 Blast Lamps. See Burners. 1474.-Blast Attachment, for blowpipe, brass. ".75 1475.-Blood, Circulating Apparatus, to illustrate the mode of circulation of the blood through the veins. Small, $4.00 Large, $10.00 1476. —Blowpipe Tables, best French make, with iron top, and drawer for tools, having brass discharge pipe:with two nozzles. Each, $40.00 1477.-Blowpipes, ox-hydric, small size. " 5.00 OF CHEIWCAL AND P;HYSIC.AL APPARAT US. 25 1475 1476 1478 1478. —Blowpipes, compound,, mounted on stand. Each, $7.50 1479.-.Blowpipe, ox-hydric, compound, on stand, with double stopcock. $10.00 1480.-Ditto, ox-hydric, unmounted, very powerful. 15.00 14881.-Ditto, for oxhydric or calcium light, carefully finished, with regulating screws. - 0.00 1481 1491 1482. —-Blow-pipe, of glass -.25 1483.-Ditto, Black's, conical, of japanned tin, with movable brass nozzle..40 148~4. —Ditto, brass, jewelers' form, 8 inch. Each,.25 1485. —Ditto, ditto, with brass bulb. " 75 1486.-Ditto, brass, Berzelius's form, short nozzle piece, and soldered platinum tips, in paper cases. Each, $2.00 26 E. B. BEiNJAMIN'S DESCRIPTIVE CATALOGUE 1482 1483 1484 1485 1486 1467 1488 1487.-Blow Pipes, brass, with barrel-shaped head, soldered platinum tip. Each, $2.50 1488.-Ditto, Plattner's form, brass, extra fine, with two tips, and extra heavy soldered platinum ends, including mouth-piece having combined effect of trumpet and cylinder. Each, $3.00 1489.-Ditto, ditto, German silver. " 3.50 1490.-Ditto, ditto, ditto, nickelized. " 4.00 (The last mentioned will not become easily oxidized.) 1491.-Ditto, brass, with blast attachment for gas, and regulating screw with mark. Each, $3.00 1492 1495 1496 1492.-Ditto, Plattner's spinne, of brass, having five jets from one reservoir, to be used in connection with Rose's Lamp and Blow Table, to produce a high heat for fusing minerals, etc. Each $5.00 1493.-Ditto, Bunsen's, blast, mounted on round iron foot, having a rubber attachment, connecting with a horn-mouth piece. Each $5.00 OF CHEMICAL AND PHYSICAL APPARATUS..27 f L i L' 1497 1498 1505 1504 1501 1494.-Blow-pipe Brass, with ivory-mouth piece, mounted on fine mahogany stand, having jet arranged with thumb-screw, so that it may be turned in either vertical or horizontal directions. Each $3.50 1495. —Ditto, ditto, with brass lamp. " 4.50 1496.-Ditto, in fine mahogany case, containing one Berzelius blow-pipe, with soldered platinum end, ten reagent cells with caps, pair of forceps and box for platinum. Each $5.00 1497.-Blow-pipe, mounted on stand, with automatic bellows. Each $12.00 Blow-pipe Apparatus. See Apparatus. 1498.-Bolt Heads, of Bohemian glass. 4 8 16 oz..35.40.50 each. 1499.-Bolt Heads, with long neck of ordinary glass. Each,.60 to $1.00 Bone Ash. See Chemicals. 1500.-Bottles for Chameleon. Each $5.00 1501.-Bottles, for Gas, Bohemian and French. 8 oz.,.35 16 oz.,.45. 22 oz.,.65 each. 1502.-Ditto, French narrow-mouthed, or Packing bottles, for corks, pressed, per doz. i i i 1 2 4 6 oz..20.25.30.35.40.50.65 1502 1503.-Ditto, ditto, ditto, oval, 2 oz., per doz..60 1504.-Ditto, best quality white imported blown glass, with ring around the neck and wide mouths; I i. 1 2 4. 6 8 16 32 oz..40'50.75 $1.00 1.25 1.50 1.75 2.50 4.00 per doz. 1505.-Ditto, ditto, narrow mouthed, same as above. '28 E. B. BENJAMIN'S DESCRIPTIVE CATALOGU 1506 1511 1512 1513 1514 1515 1519 1521 1522 1506.-Bottles, American pressed, furnished only on special ap plication. Price much below the above. 1507.-Ditto, French colored glass, narrow mouth. 1 oz.,.50 2 oz.,.60 4 oz.,.75 6 oz., $1.25 12 oz., 1.75 1508.-Ditto, ditto, ditto, wide-mouthed, same prices. 1509.-Ditto, German, wide and vial mouth. i 1 2 4 8 16 oz..40.45'50.65.75 $1.50 per doz. 1510.-Ditto, French sample, tall and taper for corks, each.40 to.50 1511.-Ditto, sample, for syrups, on glass foot. Each.25 1512.-Ditto, sample, French, narrow shape and long, of white glass. Per doz. $1.25 1513.-Ditto, salt-months, American, or wide-mouthed bottles for storing salts, ground glass stoppers, with mushroom tops. pints. quarts. 1 gal. $2.70 4.00 5.25 12.00 per doz. 1514. —Ditto, German, ditto, ditto, ditto. 1 2 4 6 8; 12 16 24 32 oz. O gal. $1.25 1.50 1.75 2.00 2.25 2.75 3.25 4.00 5.00 8.00doz. 1515. -Ditto, ditto, Bohemian, with finely-cut and polished tops, made of glass free of lead, and not easily affected by chemicals. 1 - 2 3 4 6 8 6 8 16 32 oz. $2.00 2.25 2.50 2.85 3.50 4.00 5.50 7.00 per doz. 1516.-Ditto, salt-mouths, French, with hand made stoppers accurately double-ground with the finest emery, so that reagents stored in them, will not deteriorate. +. 4 - 1 2 4 8 12 16 32oz. $1.15 1.20 1.25 1.30 1.50 2,25 3.00 4.00 5.00 5.50 7.00 per doz. 1517.-Ditto, French, colored..-1 2 4 8 1 32oz. $2,00 2.50 3.00 6.00 8.00 10.00 per doz. OF CHIEMICAL A-ND PHYSICAL APPARATUS. 29 1518.-Bottles, ditto, Bohemian black, cut and polished mushroom tops, for storing chemicals which are required to be kept from the light. Per doz. $6.50 -1519.-Ditto, American tincture, or narrow-mouth, with ground glass stoppers and mushroom tops 4 8 16 32 oz. gal. 1 gal. 2 gal. $2.00 2.25 2.63 3.00 5.25 8.00 24.00 per doz. 1520.-Ditto, ditto, square-pressed stoppers. 8 16 32 oz. $2.25 2.63 3.00 per doz. 1521.-Ditto, ditto, German flat top stoppers. i 1 2 3 4 6 8 12 16 32 oz $1.00 1.25 1.50 1.75 2.00 2.25 2.75 3.50 3.80 4.50 per doz. 1522.-Ditto, ditto, Bohemian glass, entirely free from lead, flat top stonpers, fine cut and polished tops. 1 2 4 8 16 32 oz. $2.00 2.25 2.75 4.00 5.50 7.00 per doz. 1523.-Ditto, Tincture, German, hand-made top stoppers, accurately ground with fine emery, similar to No. 1524. x i i 1 2 4 6 8 12 16 32.55.65.75.90 1.00 1.25 1.50 1.75 2.25 2.50 4.50 per doz. 1524.-Ditto, ditto, French, each stopper accurately hand-made and double-ground with finest emery, so that no air can enter to injure the solutions stored in them; these bottles are made expressly for the laboratory, to hold choice reagents. 1516 1524 ~ a ~ 1 2 4 6 8 12 16 32oz..90 $1.00 1.10 1.15 1.25 1.75 2.25 2.50 3.00 3.25 5.00 per doz. 1525.-Ditto, Tincture, French vitrified labels for Acids, Ammonia, Alcohol, etc., carefully stopped by hand, shape No. 1524. i pint. pint. quart. ~ gal..75 $1.00 1.25 2.50 each. Ditto, ditto, with engraved labels to order. 1526.-Ditto, ditto, French blue tinctures, or narrow mouth, with glass stoppers. 1 oz. 2 3 4 8 16 qt. $1.25 1.30 1.50 1.75 3.00 4.50 6.00 per doz. 1527.-Ditto, ditto, Bohemlan, fiat cut and polished tops. 4 oz., $3.00 8 oz., $4.25 per doz. '0 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1528 1529 1530 1531 1528.-Bottles, tubulated at foot and narrow mouth for corks. Qts.,.75 ~ gal., $1.00 1 gal., 1.25 each. 1529.-Ditto, Tincture, accurately ground top stopper, tubulated at foot for separations. 1 litre. 2 litres. 4 litres. $1.00 1.50 2.00 each. 1530.-Ditto, separatory, with accurately ground top stoppers, and stop-cocks carefully ground into the tubulature at foot, every joint nicely'polished with ground emery, so that neither air nor fluids can escape when enclosed. Best French. 1 2 4 8 litres. $3.50 3.75 4.75 6.25 9.50 each. 1531.-Ditto, separatory, consisting of separatory bottles and separatory funnel, joined by a rubber stopper. 1 litre, $6.00 2 litres, 8.00 each. 1532.-Ditto, chlorine, of colored glass, carefully ground, glass stopper, with glass cap fitted by ground glass joint, 1 litre capacity. Each, $2.00 1533. —Ditto, for ether, white glass, with cap and ground stoppers 1 2 4 8 16 32 oz. capacity..25.35.40.60 $1.00 1.30 each. 1534. Ditto, Woulff's small 2 neck, for weighing and fitting small apparatus. Per doz.. $6.00 1535.-Ditto, ditto, 3 necks. " 7.20 OF CH EMICAL AND PHYSICAL APPARATUS. 31 P9 ha~I~~ ni1 1541 1534 1539 1541 1542 1543 1536.-Bottles, 2 necks, with round straight neck for rubber tubing, 12 oz. Each, $1.00 1537.-Ditto, ditto, with centre neck for cork, 12 oz " 1.25 1538.-Ditto, Woulff's, Bohemian, 2 necks. 2 4 8 16 32 oz. gal..40.45.50.65.90 $1.30 each. 1539.-Ditto, ditto, with a tubulature, near bottom. Quarts, $1.50 i gal., 2.25 each. 1540.-Ditto, Woulff's Bohemian, 3 necks; 2 4 8 16 32 oz. I 1 gal.45.45.60.75 $1.00 1.25 2.50 3.25 each. 1541.-Ditto, Woulff's French, 2 necks carefully sealed on with glass shoulders. These French Woulff bottles are never known to leak about the tubulature. i~ i 1 2 4 litres..a6.75 $1.00 1.40 2.50 each 1542.-Bottles, Woulff's French, 3 necks. 1547 1 2 4 itres. 65.85 1.1 1.75 3.00 each. 1543.-Ditto, Woulff's French, 2 necks, with tubulature near foot. 1 litre, $1.75 2 litres, $2.50 4 litres, $4.00 each. 1544.-Ditto, ditto, 2 necks, stoneware, tubulature near bottom. 60 litres. Each, $60.00 1545.-Bottle Caps, of flexible vulcanized caoutchouc. Price according to _ diameter. $2.30 to 4.50 per doz. 1546.-Bottle Imps, ordinary. Each,.25 1545 1547.-Ditto, fine quality. Each,.75 1548.-Ditto, with car and balloon. " $1.00. 1549.-Bottle Brushes. See Brushes. 1550.-Boxes of black japanned tin for blow-pipe use in holding capsules, test tubes, etc. Each,.75 .32) E. B. BENJAXMIN'S DESCRIPTIVE CATALOGUE 1551.-Boxes, turned ivory, for ~ oz. bottles. Per doz.,.60 1552.-Ditto, including bottles. " $2.00 1553.-Ditto, boxwood, including bottles. " 1.50 1554.-Ditto, of pasteboard, including bottles. " 1.25 1555.-Ditto, fine turned rosewood, ivory trimmed, for tapers or bottles. Each,.25 1556.-Ditto, pasteboard, round English form, holding 2 grammes, useful for putting up ordinary reagents, pills, or small articles of jewelry. Per doz.,.25 1556 1557.-Ditto, ditto, ordinary form, round, in nests of 5, Per doz..25 1558.-Ditto, pasteboard, English form, extra quality, cherry lining, 2 grammes. Per doz. boxes,.25 1559.-Ditto, ditto, 4 grammes. ".40 1560.-Ditto, ditto, 3 in a nest, l's to 3's. ".45 1561.-Ditto, ditto, 5 in a nest, 2's to 6's ".48 1562.-Ditto, ditto, 6 in a nest, l's to 6's. ".50 1563.-Ditto, for Lip Salve, plain. Per doz. boxes, $1.00 _ 1564.-Ditto, with legend "Lip Salve." " 1.25 1563 1565.-Ditto, of best China porcelain, with wreath and legend, "Lip Salve." Per doz., $3.50 1566.-Ditto, ditto, rose and gilt, tipped. " 2.50 1567. —Ditto, ditto, turned boxwood, flat form. " 1.00 1568.-Ditto, ditto, turned rosewood, " " 1.25 1569.-Ditto, small dove-tailed pine wood. 3 x3 x 15 3 x3 x20 12x12x30.35.40 $1.00 each 1570. —Box Sieves, Griffin's, 3 partitions, used in connection with the blow-pipe. Each, $2.50 15 71.-Bologna Flasks, of thick unannealed glass, will bear a smart blow, but fracture wvhen a hard angular body is dropped into them. Per doz., $1.50 1572.-Bombs, see Candle Bombs. 1574 1575 1573. —Brass Jets, see Jets. 1574.-Brushes, fine, for Feather Tubes. Each..25 1575.-Ditto, for ordinary Test Tubes. ".10 1576. -- Ditto, ditto, large ditto, ditto. ".15 1577. —Ditto, ditto, extra large ditto, ditto, or Bottles. ".20 (The above test tube brushes are all made of galvanized iron or copper, to prevent rust.) OF CHEMICAL AND PHYSICAL APPARATUS. 33 1578.-Brushes, for bottles, patent tin handles. Each,.25 1579.-Ditto, ditto, wood handles, large size. "$1.00 1580.-Ditto, Camel's hair, for cleaning the button, in assaying. Each,.25 1581.-Ditto, bristles, ditto. ".50 1582. —Bubble Pipe, of clay, with connecting piece of brass, for blowing hydrogen bubbles. Each,.40 1583.-Ditto, ditto, of brass. ".7 1583 1587 1588 1589 1584. —Bulb Tubes, in which ignited oxide of copper may be cooled; hard glass; small sizes. Per doz.,.60 1585. —Ditto, in which ignited oxide of copper may be cooled; hard glass; large sizes. Each,.10 to.25 1586.-Bungs, of selected cork, from - in. to 2 in. Doz..20 to.70 1587. —Burettes, Bink's, English form, with wooden foot. 25 25 50 50 100 c. c. $1 I10 4 0 2 $1.50 1.75 1.75 2.25 2.25 each. 1588.-Ditto, Gay L ussac. 25 50 50 100 100 c. c. $1.50 2.00 2.50 2.25 2.50 each. 1589.- Ditto, Geissler's, with ground glass stopcock running the whole length of tube and lateral tube for receiving fluids near the top. 25 50 100 c. c Io I o 1 0 3. 4.00 each. $2.50 3.25 4.00 each. 31 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1590 1591 1592 1593 1594 1597 1598 1590.-Burettes, Mlohr's. 20 20 25 25 30 40 50 50 a ~ 10 5 10 1 0 5 2 5 $1.25 1.50 1.50 1.75 2.00 2.25 2.00 2.25 50 60 100 100 100 200 c. c. 10 5 2 1 I 0 5 $2.50 2.50 2.50 2.75 2.75 2.00 each. 1591. —Ditto, ditto, with glass stopcock. 25 25 50 50 100 100 cc. 3 }n 6 110 5 1 $2.25 2.50 3.00 3.25 3.50 4.00 each. 1592.-Ditto, for Chameleon process, with lateral tube, joined near the bottom. 25 50 c. c. $1.75 2.25 each. 1593. —Ditto, Rammelsburg's, with lateral tubes, joined near the top, and sealed in to carry the test liquor, to avoid frothing. 25 a0 c. c. $1.50 2.00 each. 1594. —Ditto, Geissler's Chameleon, having a lateral tube runnillo to the bottom. 25 50 c. c. $2.00 2.50 each. 1595.-Blurettes, Leslie's, see Leslie's Alkalimeters. 1596.-Burette Clamps. Each,.50 1597.-iBurette Swimmers, or Erdmann's Float. ".50 159S.-Burette Tips, with rubber attachments. ".25 1599.-Burette Supports and Holders, see Supports. OF CHEMICAL AIND PHYSICAL APPARATUS. 35 BURNERS. 1600.-Burners, Argand standard register, as used with Bunsen's Photometer. Each, $4.00 1601 1602 & 1603 1606 1607 1601.-Di'tto, with flame apparatus, mounted on stand for spectral analysis or polarization of light $6.00 1602.-Ditto, Bunsen's plain. Each, $1.25 1603.-Ditto, with tripod on top, to support evaporating dish. Each, $1.75 1604. —Ditto, ditto, with ring to regulate the flow of air into the burner, to produce at pleasure blue or yellow flame. Each, $1.35 1605. —Ditto, new French pattern with air regulator, consisting of lever attached to the receiving tube, which raises and lowers at pleasure a cap over the air-vent, and at same time graduates the flow of gas. Each, $2.50 1606.-Ditto, ditto, with two holes in base of Burner, to attach to retort stand, without star. Each, $1.75 1607.-Ditto, ditto, Bunsen's improved new style of Burner, having a rachet regulator in place of the ordinary air regulator, dispensing with stopcocks, and graduating the flow of air and of gas at the same time. It is simple, compact, convenient and entirely new. Each, $2.75 1608.-Ditto, ditto, having one receiver with double tube for gas and air, regulated by one stopcock; and also having a lateral jet, regulated by stopcock. A new invention, and powerful. Each, $7.50 1609.-Ditto, ditto, French, with universal joint and stopcocks for 36 E. B. -BENJAMIIN'S DESCRIPTIVE CATALOGUE 1611 1612 1610 1609 i61.S 1618 1619 the air and gas, for throwing the flame in horizontal or oblique directions. Each, $10.00 1610.-Ditto, Bunsen's blast, having the tubes for receiving gas and air at right angles, with different size tips for regulating the jet. Each, $7.50 1611.-Ditto, ditto, very small, for use in place of the mouth blowpipe for producing a very fine taper flame. Each, $5.00 1612.-Burner Attachment, for producing a gas blast, consisting of two brass tubes terminating in one jet, one of which is placed in the delivery tube of the ordinary Bunsen burner, and the other connecting with the blowing machine. Each, $1.00 1613.-Burners, Bunsen's small blast, for fastening to the table with one extra tip. Each, $6.00 1614.-Ditto, Bunsen's plain, with star and chimney. " 2.00 1615.-Ditto, ditto, with star and porcelain plate to catch the ashes of the filter. Each, $2.50 1616.-Ditto, ditto, with star, chimney and plate to catch the ashes of the filter, and provided with a thumb-screw at the base to raise and lower the burner. Each, $3.00 1617.-Ditto, ditto, plain, with two tubes. " 2.00 1618.-Ditto, ditto, plain, with three tubes. " 2.50 1619. —Ditto, Babo, with three tubes formed into one circular, OF CHEMICAL AND PHYSICAL APPARATUS. 37 opening at top, with star supporting a sheet iron chimney and stopcock to regulate the flame; also having a centre tube. Each, $9.50 1620 1621 1628 1620.-Burners, Bunsen's, with three tubes and caps, arranged so that the flame touches every part of the crucible. Each, $4.00 1 621. —Ditto, Berzelius's, having a sliding cap with thumb-screw attachment, to regulate the flow of air without stopcock, otherwise the same as the foregoing. Each, $7.50 (The two styles of Burners, Nos. 1619 and 1621, produce a solid circular flame with a centre flame, generating a high degree of heat.) 1622.-Ditto, Bunsen's, with four tubes. Each, $3.00 1623.-Ditto, ditto, six tubes. " 4.00 1624.-Ditto, ditto, eight tubes. " 5.00 1625. —Burner, Griffin's Blast Gas, with nine tubes grouped together, giving a very powerful heat when attached to a blowing table and surrounded by a fire clay cylinder. Each, $13.50 1626.-Burners, Bunsen's, French, with two tubes bent off in separate directions. Each, $2.50 1627.-Ditto, ditto, with three tubes bent off in separate directions. Each, $3.50 1628.-Ditto, Blast, terminating in six tips. 6.50 1629.-Ditto, Bunsen's, newly invented, consisting- of seven Bunsen burners, arranged in a circle, each burner having a cap to spread the flame, all enclosed in a sheet-iron frame, which concentrates the heat, and, at the same time, supports the vessel to be heated. Each, $12.00 358 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1630 1631 1632 16 5 1633 1630.-Burners, Crown or Rose, consisting of a common burner, having a cap with the sides pierced, through which small jets of flame pass out.:Each, $1.75 1631-Ditto, ditto, large size, or locomotive, producing a high degree of heat. Each, $5.00 1632.-Ditto, ditto, ditto, with a lever attached by which the flow of air and flame is regulated at the same time. A new invention. Each, $10.00 1633.-Ditto,- Mendelsohn, for heating watch glasses. " $1.75 1634.-Ditto, with long tube and ordinary gas tip. " 2.00 1635.-Ditto, Specstone, Bunsen's, single tube. " 2.00 1636.-Ditto, ditto, Rose's. Smaller, $2.50; larger, $3.00 each. 1534 1637 1638 1643 1644 1637.-Ditto, Vulcan, cast iron top and bottom, dispensing with the tripod. Each,.75 1638.-Ditto, Sand, flat shape, consisting of a hollow iron frame filled with sand and cement. through which the gas exudes. Each, $1.25 1639.-Ditto, ditto, ditto, on tripod. " 1.25 1640.-Burner Forks, for holding burner when attached to a retort support. Each,.50 OF CHEMICAL AND PHYSICAL APPARATUS. 39 1641.-Burner Plates, porcelain, for holding the ashes when filters are burned. Each,.75 1642.-Ditto, tips, of silicated steatite for attaching to the ends of common gas burners. Each,.25 to.50 1643.-Ditto, tubes, or jets with flattened ends to introduce into an ordinary Bunsen burner, to produce a flat flame. Each,.25 1644.-Ditto, furnaces, porcelain, to surround the burner to increase the heat. Each, $L25 1645.-Burnishers of Agate. " 1.50 1646.-Bolt-head experiment in Pneumatics. Apparatus for. Each, $4.00 1647.-Bell in vacuo. 9" 4.00 1648. —Bursting Squares. Per doz., $2.50 1648.A-Colorimeter, for examination of sugars and syrups, after Dr. Scheibler's method. 1649 1656 1661 1649.-Candle Bombs, small glass bulbs, filled with colored water and sealed, which explode when heated. Per doz.,.40 1650.-Caoutchonuc, unvulcanized, in sheets, for forming tubes, covering jars, etc., -20 in. thick. Per square foot,.75 1651.-Ditto, vulcanized, ditto, ditto. ".70 16052.-Ditto, Balls, pierced to attach to pipettes, syphons, etc., round and pear shape. Each,.50 -653.-Ditto, caps, vulcanized, for fitting glass tubes to glass bottles, etc., 1, 2 and 3 tubes. Each,.20 to.40 Ditto, Connectors. See Rubber Connectors. Ditto, Stoppers. See Rubber Stoppers. Ditto, Tubing. See Rubber Tubing. 1654.-Capillary Plates, for showing the parabolic curve. Per set, $2.00 1655.-Ditto, Tubes, in sets unmounted. Each,.40 0. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1656.-Capillary Tubes, mounted in japanned cistern. Per set,$2.00 1657.-Ditto, Tubing, 5 feet lengths. Each,.10 1658.-Caps for bell jars, globes, etc., of brass. Sizes, I to 1 14 14 1i to 1J 1J 2 2~ in..a5.60.65.70.75.80.85 each. 1659.-Ditto, for gas bags, etc. i i X to 1 in. diameter..50.55.60 each. Ditto, for deflagrating jars. See Deflagrating Covers. 1660.-Ditto, for galli pots, small iars, etc., silvered. Per doz.,.10 1661.-Ditto, porcelain, for lamp chimneys, to economize and reflect the light. Nos;.1 2 3 4.50.60.73.90 each. 1662.-Canules, French. Per doz., $1.25 Capsules of glass. See Glass Evaporating Dishes. 1663.-Ditto, of horn. 11 2 2~ 3 34 4 41 41 an.20.24.32.36.45..7.72.88 $1.0t er pair Ditto, of iron.. See Sand Baths. 1664 1667 1669 1672 1673 1664. —Ditto, ditto, transparent glazing inside, lipped. Sizes, a 6 7 in. $1.20 1.40 2.00 each. 1665.-Ditto, of platinum, sizes as required. Per oz. (gold), $10.0(C 1666.-Ditto, of silver, sizes as required. " " 2.50 1667.-Ditto, of porcelain, nests of 5, without lip, glazed inside, similar to watch glasses, very shallow. Per nest, $1.00 1668.-Ditto, ditto, 3 in nest..75 Ditto, ditto, French. See Evaporating Dishes. 1669.-Ditto, ditto, with a sharp lip, nests of 4, very thin and transparent. Per nest,.80 1670.-Ditto, ditto, with rounding lip, nests of 4, with perpendicular sides and flat bottoms, about - of an inch deep. Per nest, $1.00 1671.-Ditto, round bottom, without lip, glazed throughout, about 2 inches in diameter across the top and deep. Per doz., $2.50 1672. —Ditto, Plattner's, flat bottom and straight sides, holding about j ounce, semi Berlin. Per doz., $1.25 OF CHEMICLAL AND PHYSICAL APPARATUS. 41 I673.-Capsules, Plattner's flat bottom and oblique sides, holding about i of an ounce. of fine Meissen porcelain. Each,.20 1674.-Ditto, of porcelain, very small, for blow-pipe fusions, and of extra hard and tough porcelain. Per doz., $1.20 1675.-Ditto, half-egg form, of extra fine and thin porcelain, to sustain a high heat. Per doz., $1.75 Ditto, with handles. See Royal Berlin Casseroles. Ditto, other forms. See Digestors, Evaporating Dishes, Combustion Boats, etc. 1676.-Carbonic Acid, liquified, in sealed barometer tubes, enclosed in velvet lined leather cases. Each, $6.50 Ditto, ditto, apparatus. See Potash Bulbs. 167 7. —Carbons,for Bunsen's and other batteries,of French graphite. Sizes, 6 7 10 in..40.50.75 each. 1678.-Ditto, flat, i inch thick, 10 x 6 in. Each,.75 1679.-Ditto, pencils, of pure graphite,for the electric light. Per inch,.6 1680 1681 1680. —Carbonic Acid Generator, consisting of a glass jar, containing a bell-shape gas holder and leaden tripod. The gas is delivered through a gallows screw connector. 12 15 20 in. high. $10.00 15.00 20.00 each. 1681.-Ditto, Water Apparatus, 1 quart capacity, made of glass covered with reed netting, porcelain foot. Each, $7.50 42 E. B. BENJADMIN'S DESCRIPTIVE CATALOGUE 1682 16ij 1682 1686 1682.-Carboys of Earthen Ware, with filter, for the manufacture of chlorine. Each, $10.00 1583.-Ditto, ditto, for the concentration of acid or ammonia. 60 100 litres. $10.00 12.00 each. 1684.-Carthesian Imps, ordinary, black. Each,.20 1685.-Ditto, ditto, fine quality. Each,.75 to $1.00 1686.-Ditto, ditto, with jar, additional. Each, $1.50 1686.A-Cases, to hold 6 bichromate battery cells. " 1.50 1687.-Caseroles, semi Berlin, ordinary form, with lip and straight-flattened handle, glazed inside and outside. Sizes, No. 00 0 1 2 3 4 Price,.35.50.70.85 $1,00 1.35 each. 1687 1688 1690 1691 1688.-Ditto,deep, for coloring pots used in manufacturing jewelry. Sizes, 5~ 6 71 in. Prices, $3.00 4.00 5.00 each. 1689.-Ditto, Royal Berlin, lipped, looped handle glazed inside and out, 1~ ounce capacity each. Each,.40 1690.-Ditto, ditto, lipped and round porcelain handle. 1 2 3 oz..30.35.40 each. 1691.-Ditto, of fnest French porcelain, glazed inside and out, except the bottom, having cover and wooden handle. Nos. 5 4 3 2 1 1 extra. $1.93 1.25 1.50 2.00 2.25 4.00 each. OF CHEMICAL AND PHYSICAL APPARATUS. 43 1692.-Caseroles, Meissen, glazed throughout, except the bottom, loop handle. Nos 3 2 1.75 $1.00 1.25 each. 1692..A-Cassolettes, Lubin's, of rosewood, for holding small quantities of perfume. Per doz., $3.00 1693.-Cat Skins, for exciting electric apparatus. Each, $1.00 1693.A-Caustic Holders, of ivory, with metallic ends. " 4.00 1694.-Cells, carbon, for fusion supports. ".50 1695.-Ditto, porous, French and German, imported. 2x4 2-x4 21x5j 21x6 2x x7 3x8 in..12.15.20.30.45.50 1696.-Ditto, ditto, sizes above, 3-x 8. Each,.75 to $1.00 1697.-Ditto, oval microscopic of plate glass, 1~ x 3 inches. Each,.50 1695 1698. — Centimetre Measures, of boxwood, having centimetres on one side and English inches on the other. Each,.50 1699.-Ditto, ditto, of ivory, in millimetres, up to 5 centimetres. Each, $2.00 1700.-Ditto, ditto, of ivory, having English inches on one side and graduated up to 1 metre. Each, $2.25 1701. —Charcoal Pieces, prepared for use in blow-pipe fusions. 4 pieces for.25 1702.-Ditto, Borers, Plattner's, of steel, with spatula handle. Nos. 1 2 3.30.35.40 each. 1703.-Ditto, ditto, with polished cocoa handles. Nos. 4 5 6.50.60.75 each. 1704. —Ditto, ditto, with eight points, with 1702 1703 1704 1706 polished cocoa handles and brass ferule. Nos. 7 8 9 $1.00 1.20 1.25 each. 1705.-Ditto, Holder, with platinum attachment and wood handle. Each, $3.25 1706.-Ditto, Saw, small. ".50 1707.-Ditto, ditto, large. ".75 44 E. B. BENJAMIN7S DESCRIPTIVE CATALOGUE 1708.-Charcoal Spatula, steel, P]attner's, cocoa handle. Ea..50 1709.- Ditto, Tongs, bent, 18 inches long, light weight. Per pair,.75 1709 1710 1713 1714 1715 17Ai 1710.-Ditto, ditto, bent inwards, with the insides rasped andt handles twine wound, for cold weather. Each, $1.25i 1711.-Ditto, Sticks, for breaking glass, according to size. Per doz.,.50 to.60 1712.-Chisels, of Steel, Plattner's, for clipping ingots. Each,.50 1713. —Chloride of Calcium Jars, on foot, with tubulature at side, near the bottom, for drying gases. 4 8 12 16 24 32 oz..65.85 $1.00 1.50 2.50 3.50 each. 1714. - Ditto, ditto, Tubes, small, straight, assorted. Each,.15 1715.-Ditto, ditto, 2 bulbs, 8 inch. Each,.25 1716.-Ditto, ditto, bent ends. Each,.25 1719 1720 1717.-Ditto, ditto, large size; 12 to 16 inches. Each,.50 1718.-Ditto, ditto, straight, with small tubes iniserted in a cork at either end. Each,.20 1719. —Ditto, ditto, Marchand's, UT shape, with connecting tube. Each,.50 1720. —Ditto ditto, U shape, plain. 6 8 10 inch..30.50.60 each. .OF CHEMICAL ANiD PHYSICAL APPARATUS. 45 1721.-Chloride of Calcium Tubes, in setts of 3, each forming around the other. Per set,.75 17922 1723 1727 1722.-Ditto, ditto, ditto, with 3 bulbs, small. 4 to 5 inches. 8 in..40.75 each. 1723.-Ditto, ditto, U shape, Fresenius' form, 2 bulbs in each limb, and half-bulb in connecting tube. Each,.75 1724. —Ditto, ditto, U shape, with drip in the centre. Each, $1.00 1725.-Ditto, ditto, with stopcock in the drip. Each, $3.50 1730 1726.-Ditto, ditto, V form, 9 inches high. Each,.60 1727.-Ditto, ditto, Weeber's, U form, having 3 large bulbs. Each,.75 1728.-Charts, colored, showing the spectra of stars and metals, according to Kir-hoff and Bunsen. Size, 28 x 40 Each, $3.25 1729.-Ditto, ditto, in sets of 3. 9.00 1730.-Ditto, of snow crystals, showing the different forms assumed by frozen vapor. Size, 24 x 36. Each, $4.00 1731.-Chlorine Gas Generating Apparatus, consisting of glass flask, safety funnel, and delivery tube. pts. qts. I gal..90 $1.10 1.35 each. 1732.-Ditto, ditto, with wash bottle. pts. qts. gal. $1.1.5 1.35 1.90 each 1733.-Ditto, ditto, apparatus for generating, consisting of 1712 lamp, pneumatic trough, iron stand, flasks. sand bath, etc. Each, $10.00 46 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1734 1736 1 734.-Chlorine Gas Apparatus, Silliman's method. Each, $6.00 1735.-Ditto, absorbing apparatus, Bunsen's, for use in volumetric analysis, as described in Mohr's titrir method, exclusive of stand and lamp. Each,.75 Y736.-Ditto, ditto, Bunsen's style. ".75 1737.-Ditto, ditto, Mohr's, without jar. " $1.25 1738.-Ditto, Meter, Descroizelle's, graduated in 100 c.c." 2.50 1739.-Ditto, ditto, Gay Lussac, graduated in 100 c.c. " 2.50 1740.-Ditto, ditto, Mohr's. " 1.25 1741. —Ditto, Bottles, of cobalt glass, 1 litre, with glass cap, and tightly-fitting joint. Each, $2.00 1742.-Ditto, Jar, stout glass for burning substances in chlorine. Each, $3.00 to 5.00 1743.-Ditto, Safety Pipette, according to Mohr, with safety tube, rubber tube, and pinch-cock. Each, $1.00 Ditto, Gas Bottles. See Gas 1744 Bottles. 1'44. —Ditto, Distilling Apparatus, for distillation of chlorine and iodide of potassium, according to Fresenius. Each, $1.00 1745. —Ditto, ditto, according to Mohr, consisting of two flasks, connecting tube, safety tube, and stopcock. Each, $1.50 1746.-Chime, of 2 bells. " 2.50 OF CHEMICAL AND PHYSICAL APPARATUS. 47 1747.-Chime, of 3 bells. Each, $3.25 1748.-Ditto, of 5 bells. 5 b.00 1749 1750 1751 1755 1758 1749.-Clamps, wooden, for holding test tubes in the flame. Each,.20 1750.-Ditto, larger, with a spring for holding larger tubes.".50 1751.-Ditto, heavy iron, with rod to attach to the counter." $1.00 1752.-Ditto, in sets, with cork, lined jaws. Per pair, 3.00 1753.-Ditto, smaller, of iron, to attach to a retort stand, also having cork-lined jaws. Each, $1.23 1754.-Ditto, for watch glasses, Dr. Craig's form. ".20 1755.-Ditto, ditto, Hoffman's form. ".20 1756.-Ditto, ditto, Mohr's form. 3 4 5 6 in.'25.30.35.40 each. 1757.-Ditto, for holding hot test tubes, metallic, with wooden handle. Each,.50 Ditto, for batteries. See Binding Clamps. Ditto, wooden, for burettes, pipettes, retorts, etc. See Supports. Clay Supports. See Crucible Supports. 1758. — Cobalt Bottles, with cap and long stopper, German glass. 1 oz..35.50 each. See also Acid Bottles. Ditto, Glasses, used in testing colored flame. See Colored Glasses. Coddington Lenses. See Lenses and Loups. 48 E. B. BENJAMIIN'S DESCRIPTIVE CATALOGUE 1759 1760 1759.-Coffee Machines, glass and porcelain, French. Each, $7.50 1760.-Ditto, ditto, porcelain, German, for preparation 1764 of coffee for the table, by infusion. A very highly prized apparatus by those who use it. Nos. 3 4 5 $3.50 4.50 6.00 each. Coils, Ruhmkorff's. See Electrical Coils. Colanders. See Straining Dishes, Baskets, Filters, etc. 1761.-Collection of Crown Diamonds, glass models, consisting of Kohinoor and three others of the royal diamonds, in a nice velvet lined, morocco case. Each, $20.00 1762.-Ditto, of artificial gems, showing the form of crystalization of the precious stones; also, the different styles in which diamonds are cut, in a velvet-lined mahogany box. Each, $20.00 1 763.-Ditto, of glass crystals, in a velvet-lined box. " 15.00 1 764. —Ditto, of crystalographic, models in wood ]tnse's. 104 picees, Each, $20.00 1765.-=Ditto, ditto, smaller, 34 pieces. " 9.00 1766. —Ditto, ditto, primary forms 1767.-Ditto, ditto, of glass, with strings, for showing their axes. 1768, —Ditto, of 10 rare specimens for spectral analysis, with tubes having platinum ends, in a highly polished case of boxwood, Complete. Per set, $7.50 1769. —Ditto, of objects for examination by the solar microscope, mounted, on cork. $25.00 OF CHEMICAL AND PHYSICAL APPARATUS. 49 1770.-Collection of Nitrogen disengaged during combustion of organic bodies. Simpson's apparatus for..75 Collections of apparatus. See the latter part of this book. Ditto, of minerals, fossils, etc. See Minerals. 1771. —Collision Balls, set of 6 ivory balls, mounted on mahogany frame, graduated are. $20.00 1778 1772 1776 15772.-Ditto, ditto, set of 5 balls, of hard wood, mounted. $3,5( Collodion Balloons. See Balloons. 1773.-Colored Glasses, for fancy glass blowing, in rods about 3 feet long. Each,.25 1774.-Ditto, Glass Plates, used in testing colored flame. Size, 3x3 4x4 5x5 inches..15.20.25 each. Color Tests. See Tests papers. 1775.-Color Test Slab, of porcelain, having 12 cavities; 4+ x2~ inches. Each,.75 1776.-Combustion Boats or Capsules, of porcelain. 21 to 3 3~ to 4 6 in..20.30.50 each. 1776.A-Ditto, ditto, of platinum. Price, per grain,.3 1777.-Combustion Furnace, Storers, consisting of 2 tubes, surrounded by a sheet-iron frame, having the top covered with wire gauze. Each, $1.50 1778.-Ditto, Liebig's, as improved by Stenhouse, of sheet iron, for use with charcoal. Length, 18 in., $2.75 24 in., $3.25. 17 79.-Ditto, Bunsen's, having 25 burners. Imported. Each, $60.00 1780.-Ditto, American. " 50.00 50 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1781.-Conlbustion Furnace, French, having 10 burners. Each, $30.00 fig.. 4 1781 1782.-Ditto, ditto, for use with coal oil, as invented and employed by St. Clair Deville, with one burner, dropping tube and doors to set in for a draft, (without tank.) Each, $12.00 1'783.-Ditto, ditto, with 2 burners. " " 18.00 1784.-Ditto, ditto, with 3'" ". 22.00 1785 1785.-Ditto, ditto, with 4 burners. " Each, $30,00 OF CHEMICAL AND PHYSICAL APPARATUS. 51 1786.-Combustion Furnace, ditto, of St. Clair Deville, with 5 burners, without tank. $40.00 1787.-Ditto, ditto, tank for oil. Each, $25.00 1788.-Ditto, Lamps. See Combustion Furnaces with gas 1789. — Ditto, Foil of Copper, for enveloping the tube in organic analysis. Per ounce,.5 1790.-Ditto, Tubing, of genuine hard, infusible Bohemian glass. (For sizes, see Glass Tubes.) Per lb., $1.25 1791 1791 1795 1799 1800 1791.-Ditto, ditto, i to i in. diameter, drawn to a point and bent for Liebig's furnace. 18 24 in..40' 50 each. 1792.-Ditto, Tubes, of best infusible Bohemian glass, sealed at one end, for nitrogen determinations. 18 24 in..35.45 each. 1793.-Ditto, ditto, porcelain, straight, 1 inch bore. Each,.50 1794.-Ditto, ditto, fine French, 1~ in. bore. " $1.50 1795.-Ditto, ditto, Meissen porcelain, flanged at both ends, and glazed inside. I1 2 in. diameter..75 $1.00 2.00 each. 1796.-Ditto, Bricks, of fire clay, for use with Bunsen's furnace. Each,.20 1797.-Ditto, Supports, for the trough. ".10 1798.-Ditto, Troughs, of fire clay, for supporting the tubes, 6 to 8 in. long. Each,.20 1799.-Commutators, or pole changers, for reversing the electric current. Each, $9.00 to 15.00 1800. —Compasses, mounted on brass stands, swung on agate 52 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE pivots, resting on fine steel points, with polished wooden cases for carrying them. Each, $2.50 1801 1803 1806 1801. — Compasses, plain, steel bearings. Each,.75 1802.-Ditto, brass cases, with spring stop and agate bearing. No. 1, $1.00 No. 2, $1.50 each. 1803.-Ditto, watch form. No. 4, $3.50 No. 3, $4.00 each. 1804.-Ditto, ditto, finer graduation, an accurate registry, enclosed in brass cases, with cover, especially for geologists. Each, $6.00 1805.-Ditto, ditto, German silver. " 6,50 1806.-Ditto, ditto, mineralogical, mounted, as above, with a sliding and swing indicator, showing the angle of the drip. Each, $15.00 1807.-Ditto, ditto, very fine Geological, German silver-mounted watch case, hung on agate, with a spring top, having also a sun dial arrangement, with universal meridian and registered meridian of chief cities in United States and Europe. Ea. $27.50 1808. —Compound Bar, for showing the expansion and contraction of two metals joined together, under the influence of extremes of temperature. Each, $1.00 1809 1810 1809.-Condensers, Liebig's form, of glass, small, unmounted. Each, $1.00 1810.-Ditto, ditto, large, mounted. " 2.00 OF CHEMICAL AND PHYSICAL APPARATUS. 53 1811.-Condensers, Liebig's form, japanned tin. Ea. $3.50 1812.-Ditto. brass soldered, mounted on stand. " 6.00 1813.-Ditto, ditto, brazed, with movable joints, sliding rod, glass tube, fitted, etc., complete. Each, $7.50 1814.-Ditto, V form, with small tube fitted into each opening, with a rubber stopper Each,.50 to 81.00 1815.-Ditto, electrical, Riess's, for frictional electricity, and showing the theory of electrical condensers. Ea., $20.00 1693A Caustic holder. See No. 1693A. 1816.-Condenser, Schober's, new German invention. 1817 1819 _U4;odc 1821 1818' 1820 1817.-Condensing Tubes, with two stopcocks, as per illustration; the wide part i of an inch in diameter. Each, $3.00 1818.-Ditto, ditto, with stopcock on the bend. " 3.00 1819.-Ditto, ditto, straight, with 3 stopcocks, as per illustratio Each, $4.00 1820.-Ditto, ditto, U form, with two of the stopcocks on one limb, and one on the other, so that the liquid can be drawn off in small portions. Each, $4.00 1821.-Condensing Chamber, for use with air-pump, 1822 with movable interior tube, etc. Each, $9.00 1822.-Ditto, Cylinder, with stopcocks, complete, size, 7 x 1~ in. Each, $9.50 1823.-Ditto, or boiling flasks, with lateral bent tube, as used in connection with Liebig's condenser, for boiling small quantities of liquids. 1823 1 2 3 oz. capacity..15.18.20 each g54~ E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1824.-Condensing Worm, of block tin, enclosed in a zinc tub, used for distilling water, etc., according to size. Each, $2.50 and upwards. 1825.-Ditto, ditto, of glass, enclosed in a glass receiver. Each, $1.75 1826.-Ditto, ditto, with iron support. c" 3.00 Ditto, Pumps. See Pneumatic Pumps. 1827.-Conduction of Heat, downwards, slowly in fluids, apparatus for showing, Each, $2.50 1828.-Conductometer, for illustrating,the comparative power of different metals for conducting heat. Each, $2.50 1829. —Cones, dissected. " 2.50 1830. —Cone of Platinum, for supporting the filter in Bunsen's method of rapid filtration. Price,.75 1831 1831 1832 1833 1834 1835 1831.-Connecting or Drying Limb, Mits cherlich's or Liebig's. Each,.35 1832. —Ditto, Tube, for nitrogen apparatus. C".50 1833.-Ditto, ditto, of glass, or three way tubes, Y shape. ".25 1834.-Ditto, ditto, with three openings, T shape. ".25 1835. Ditto, Tubes, bent at different angles. ".15 1836.-Ditto, ditto, with two or three lateral tubes. ".50 1837.-Connectors of Brass, with male and female screws. Each,.31838.-Ditto, ditto, with double male screw, without stopcock. Each,.35 1839. —Ditto, ditto, with double female screw, 1837 1838 1839 without stopcock. (See also stopcocks and bladder pieces.) Ea..30 OF CHEMICAL AND PHYSICAL APPARATUS. 55 Connections, for batteries. See Binding Screws and Clamps. 1840.-Connectors, gallows-screw, Hare's. Each, $1.00 1841.-Ditto, unvulcanized rubber, 2 in. long. s id, 4 in. bore..40.50.60 doz. 1842.-Connectors, vulcanized rubber. 1840' 1 4 i in..25.30.40.45.55 Der doz. 1854 APPARATUS FOR MAKING CHLORINE. 1843.-Cooper's Mercurial Receiver. Each,.50 to.75 Copper Foil. See Combustion Foil. 1844.-Ditto, Sheet, for galvanic experiments. Per lb.,.50 1845.-Cork Teats. Per doz., $2.00 Corks, rubber. See Rubber Stoppers. 1846.-Ditto, champagne. " $6.00 1847.-Ditto, velvet, long and small. ".10 1848. —Ditto, chemical, carefully selected. Nos. 0 to 5 5 6 7 8 9 10.06.07.08.10.11.13.16 per doz. i i 1 16 14 1+ 1~.18.20.22.25.31.35.41 1Q- 1} 1} 2 in..50.55.60.65 per doz. 1849.-Ditto, extra large and flat. Per doz.,.75 18O0.-Cork Borers, set of 12, each borer having a handle of ordinary brass. Per set, $4.00 1851.-Ditto, ditto, set of 12, each best German make. 1850 1a- 1A - i -,}I; 1 ~3 ~-A1 i 1- in. diam'r. Per set, $4.50 356 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1852.-Cork Borers, set of 6. Each, $2.25 1853.-Ditto, ditto, set of 3.' 1.10 The ordinary quality not kept in stock; the above are of the very best hardened brass. 1854.-Ditto, ditto, of steel, wooden handle. $1.50 1.70 1.80 2.00 each. Ditto, Files. See round files and rasps. 1855.-Ditto, Knife, for cutting corks. Each,.25 1856.-Ditto, Pressers, of cast iron. ".50 1856 1857 1858 1857.-Ditto, ditto, of steel, usual style. Each, $1.03 1858.-Ditto, ditto, with fine teeth and extra nib. 1.25 1859.-Ditto, ditto, heavier. " 1.00 1860. —Ditto, Screws, for pocket. ".25 1861.-Ditto, ditto, larger, with wood handles.'.40 1862.-Ditto Lined Tongs, of steel, for holding hot tubes. Each, $1.25 3,, _- _" Cotton lamp-wick. See Wicks. 1863 1863.-Covers, convex, of glass, for covering Beakers, etc. 3 31 4 41 5 6 in. $2.50 3.00 3.50 4.00 5.00 6.00 per doz. 1864.-Ditto, glass, flat. 2 2~ 3 4 5 6 in..50.75 $1.00 1.23 1.50 2.00 per doz. Single covers, 20 per cent. higher. 1865.-A full set of ditto, one each size..65 1866.-Ditto, ditto, with a hole in the side, for stirring rod. 2 2~ 3 4 5 6 in..75 $1.00 1.25 1.50 2.00 2.50 per doz. Single covers the same style, 20 per cent. higher. 1867.-Ditto, with a hole bored in the centre, to receive a funnel, 3 4 5 6 in. $2.00 2.50 3.00 3.50 per doz. Single ones, 20 per cent. higher. 1868. —Ditto, flat, round French plate glass, 2 in. Each,.25 1869.-Ditto, flat, square, ground glass. 2 4 5 6 7 8 9 10 in..40 $1.00 1.50 2.00 2.40 3.00 3.2-5 4.00 eacn. Single glasses, 10 per cent. higher. Ditto, other, flat. See glass plates. OF CHEMICAL AND PHYSICAL APPARATUS. 57 1870.-Covers, glass, with knob, useful for covering choice specimens or small apparatus when laying on the table. 4 7 in. 1870.50.75 each. 1871. —Ditto, microscopic, very thin glass, cut in circles. Per doz.,.35; per ounce, $4.00 t8722.-Ditto, ditto, cut in squares. ".30; " $3.00 1873.-Cremometer, Chevalier, with jar and thermometer. $1.50 1874.-Ditto, Quevenne, with jar and thermometer. 1.00 1875.-Ditto, glass foot, graduated, 0 to 12..60 1876.-Crucibles, assay of unglazed porous clay, American. Per doz., $1.00 1877.-Ditto French, unglazed white porous clay. doz. $2.50 1878.-Ditto, Beaufay, French, soft, nearly white material, tall, narrow form, with spout, used for fluxing pots and for fusing enamel. NO. HEIGHT. WIDTH, PRICE. 1 2 1l $0.05 each. 2 2k 12.0 "c 3 24 1i.07 4 3f 2.09 5 31 21.10 6 4 21.12, 7 4- 2k.16 8 5.20o' 9 5* 3.22 2' 10 6 3+.25 " 12 7 4.50 " 14 8+ 4`a.75 16 10+ 5- 1.30 " 18 12 6+ 2.00 " 1879.-Crucible, Beaufay covers, round. 1- to 3 4 to 6 in..04+.08 each. 1880.-Ditto, ditto, triangular, assorted sizes. i 1880 Each,.06I 1881.-Crucibles, iron, with covers, 3 to o ounces. Each, $1.00 1882.-Crucibles, plumbago, or black lead, E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE round, with lip suitable for the fusion of the most refractory metals, gold, silver, brass, steel, iron, glass, etc., not subject to crack, and may be used repeatedly for most metals. Nos. 1 2 3 4 6 7 8 10 12 14 16 18 20.20.25.30.35.45.50.55.75 $1.00 1.15 1.31 1.47 1.63 ea. 1883.-Crucibles, Plumbago, covers, Nos. 1 to 4. Each,.10 Above No. 4,.02 extra, each number. 1884. —D'itto, cast iron. E pt. pts. $2.50 2.75 each. 1885.-Ditto, porcelain, from the Royal Berlin fac- 1882 tory, with covers, glazed inside and out, except the bottom, uniform thinness. NO. DIAMETER. CONTENTS. PRICE. 000 1 inch. - ounce. $0.10 each. 00,,, c.15 " 0 1 c ".25 1 1, C i.30 2 2 4" 1 ".40 3 2J" 2 ".50 4 3 " 4 ".60;' S 31 " 8 ".75 1886.-Crucibles, Meissen, tall form, with covers, glazed throughout. NO. DIAMETER. DEPTH. CAPACITY. PRICE. 10 i inch. i inch. 15 grains. $0.10 each. 9 1 " i " 40 ".13" 8 1* " 2 2drachms..16 6 1 " 1 " 6~ ".20 5 14 " 1 c " 11 ounce..26 4 24 c 1i " 2 ".32 3 2j " 2 ", 3 ",.40 2 21 ", 21 ", 4',.50 1 3 c" 2 c" 6 ".75 "' 1887.-Crucibles, unglazed, semi-porcelain, round, tall, with lip and covers. Nos. 1 2 3 4 5 6 7 8 9 10 11 Capacity, Price,.15.20.25.35.40.45.55.65.75.85 $1.00 each. OF CHEMICAL AND PHYSICAL APPARATUS. 59 1887A.-Charcoal Moulds, oblong, of wood. Ea. $1.25 1889 1891-92 1893 1895 1896 1909 1888. —Crucibles, full nests of the above, as 1887. Each, $5.00 1889.-Ditto, glazed, porcelain, flat bottom, with covers. 6 8 12 16 oz..40.45.55.65 each. 1890.-Ditto, unglazed, biscuit ware, conical form, perforated cover and gas reduction tube. Nos. 2 1.40.50 each. 1891.-Ditto, conical form, of biscuit, fiat bottom, and flat cover, perforated to permit the escape of gases, used for fusing nitrate of silver. 1~r 11 in..25.30 each. 1892, — Ditto, tubes, for the above. Each, $1.25 1893.-Ditto, Platinum, of the best French hammered, which is generally conceded to be superior to the English in quality. i i ~} 1 1 j 2 oz. According to quantity. Per gramme,.40 to.45 1894.-Ditto, Silver, 2, 4, 6, 8 ounces. Per oz., $5.50 1895. — Ditto, Metallurgists, or poellons, of fire clay. Each,.20 1896.-Ditto, Sand, or Hessian, in nests, small fours. Per nest,.05 1897.-Ditto, ditto, small fives. ".05 1898.-Ditto, ditto, large fours. ".14 1899.-Ditto, ditto, large fives. ".15 1900.-Ditto, ditto, round sixes. ".20 1901.-Ditto, ditto, triangular sevens. ".30 1902. —Ditto, ditto, ditto, eights. ".35 1903.-Ditto, ditto, single No. 8. Each,.25 1904.-Ditto, single French No. 7. ".25 1905.-Ditto, ditto, No. 4. Per 100, $10,00 1906.-Crucible Covers, sand or hessian, small. Each,.10 1907.-Ditto, ditto, large, round. ".40 C,0 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1908. —Crucibles, roasting. Per doz.,.75 1909.-Crucible Moulds, of boxwood, for makino charcoal crucibles, for quantitative blow-pipe assays. Each,.75 1916 1 J14 1911 1912 1915 1917 1910.-Ditto, altto, Plattner's, of brass, in four pieces, for making small crucibles of clay. Each, $4.25 Capsules, blow-pipe. See Mixing Capsules. 1911. —Crucible Supports, of fire clay, for supporting crucibles in a furnace, to keep them at a distance from the grate. Each,.1G Ditto, Tongs. See Tongs. 1912.-Cryophorus, Wollaston's, double bulb. $2.00 1913.-Ditto, ditto, smaller, or single bulb. 1.75 1914.-Crystal Drainers, conical. 3 4 5 in..50.55.75 each. 1915.-Ditto, ditto, hemispherical. 3 4 5 6in..30.40.50.70 each. 1916.-Crystallizing Dishes, of glass, on three glass feet. 3 3. 3- in..50.60.76 each. 1917. — Ditto, ditto, round, of thin Bohemian glass, flat bottom, with perpendicular sides, in nests of 9. Per nest, $2.00 In nests of 4, the smallest. i.75 1918.-Crystallizing Dishes, of porcelain, large oval shape, with cover. Each, $5.00 Crystallizing ditto. See flat bottom evaporating dishes. OF CHEMIICAL AND PHYSICAL APPARATUS. 61 Crytallizing Kettles. See kettles. Cubic Centimetre Flasks. See Litre flasks. 1919 1923 1924 1926 1927 1930 1928 1931 1921 1922 1929 1932 1919.-Cupels, of pure French bone-ash, from the same manufacture as those used in the French mint; each cupel being carefully wrapped in cotton, and then enclosed in paper. Nos. 1 2 3 4 5 6 7 8 4 i; 1 1! 1~ 11 1~ 1. in. Price,.35.45.50.60.75.95 $1.25 2.25 per doz. 1920.-Cupel Holders, or Trays, of iron, containing 12 partitions for holding cupels when several assays are under examination. Each, $1.00 1921.-Ditto, Moulds, of brass, used in forming the cupel. Up to No. 5, $2.50; larger, $3.50 to 5.00 1922.-Ditto, ditto, of steel, Plattner's, for cupellation before the blow-pipe, consisting of two cupel moulds, different sizes, with corresponding pestles and a support; the cupels are exposed to the flame upon the moulds. Each, $2.75 Ditto, Furnace. See Furnaces. 1923.-Cupping Glasses. French. Per doz., $1.25 1924.-Cups, annealing, American. " 1.00 1925. — itto, ditto, French. cc 2.50 1926.-Ditto, porcelain, for feeding the sick and infants, plain. Per doz., $2.50 1927.-Ditto, ditto, stout. " 3.00 1928.-Ditto, ditto, covered, and swan neck. " 4.50 1929.-Ditto, for medicine, small. 3.00 62 E. B. BENJAMIIN'S DESCRIPTIVE CATALOGUE 1930. —Cups for Medicine, larger. Per doz. $3.50 1931.-Ditto, ditto, mounted on feet. " 6.00 1932. —Ditto, ditto, scoop shape. ".75 1933 1940 1941 1942 1943 1933.-Ditto, for Seidlitz's powders, of porcelain, having two partitions, one side to receive the acid and the other the salts, so that they become mixed in drinking or pouring out, producing constant fermentation. Each,.75 Ditto, porous. See Cells, porous. 1934.-Cutting Pliers, steel, ordinary ".75 1935.-Ditto, ditto, extra strong, for crushing minerals. " $1.50 1936.-Cuvettes, or oblong drainers. ".75 1937.-Ditto, Daguerrian, of fine Royal Berlin porcelain, having lip in one corner, about 6 to 9 inches. Each, $2.00 Cylinders. See Porous Cells. 1938.-Ditto, glass, opened at either end. 4x6 4x7 4x9. ".40 1939.-Ditto, ditto, 38 x 6, 3 x 88. ".50 1940.-Ditto, plain, on glass foot, flanged tops. 4 6 8 10 12 in..35.40.50.55.60 each. 1941. Ditto, tall, straight side, and ring arn:lnd the top, for observing color of gases, viz., chlorine, etc., 30 x 3 inches. Each, $2.f0 1942. Ditto, plain, on glass foot, with ring around the tip, roughed for glass covers. 5 6 8 10 12 13 15 20 in..30.35.37.45.50.52.55.75 each. 1943.-Ditto, ditto, pouring, lipped, on g],ss font 5 6 8 10 12 13 15 2C in. high.30.35.40.50.55.57;60.70 each. OF CHEMICAL AND PHYSICAL APPARATUS. 63 1944.-Cylinders, pouring, on wood foot, for specific gravity hydrometers, with flanged tops. Per doz., $6.00 Ditto, ditto, with glass foot, for mercury. See Mercury Jars. 1945. —Ditto, glass, graduated into cubic inches. 5 12 20 30 50 c. in..70 $1.15 1.6 - 2.25 3.25 each. /A 1946 1949 1950 1954 1946. —lttio, ditto, with lip, graduated into cubic centimetres 5 10 25 50 100 200 250 300 500 1000 centimetres..50.60.75 $1.12 1.75 2.25 2.50 2.75 3.00 3.50 eachl 1947.-Ditto, ditto, French. 250 c. c. $2.25 500 c. c. $3.25 each. 1948.-Ditto, on glass foot, with pouring lip and double graduation. 25 50 100 200 250 500 1000 c. c. $1.20 1.40 2.00 2.25 2.50 3.50 4.00 each. 1949.-Ditto, ditto, stoppered, or mixing bottles. 25 50 100 200 500 1000 c.c. - 1 1 1 1 1 $1.30 2.00 2.25 2.75 3.75 4.50 each. 1950.-Leslie's, 100 c.c. in 10. Each, $2.25 1951.-Ditto, graduated, of glass, pouring lip and wooden foot. 250 500 1000 gr. 5 5 $1.25 1.50 2.00 each. 1952.-Ditto, French, of exactly even width inside, and carefully graduated, very useful where exact results are demanded. 10 15 25 grammes. 1953.-Ditto, of glass, with pouring lip. 500 1000 grains..75 $1.00 each. 64 E. B. BENJA3IIN'S DESCRIPTIVE CATALOGUE 1954.-Cylinders, for electric machines. 10 to 12 13 to 15 18 in. $1.50 2.00 2.50 each. 1955.-Cylinder, 100 fluid grains, graduated to 10 fluid grains stoppered. Each, $1.50 1956.-Ditto, 500 grains in ~ grains, stoppered, glass foot. " 2.25 195 7.-Ditto, 500 grs., without stopper; pouring lip," " 1.50 1958.-Ditto, 1000 grains, " " " " 2.25 Carre's Ice Freezer. See Ice. 1959. — Day and Night Thermometer, of glass. 4.00 1960. —Davy's Safety Lamp, for coal miners, with key. 5.73 1961.-Decanting Jar, porcelain, with six tubulatures and two knobbed handles, for the washing of powders and their separation into different degrees of fineness, and for decanting liquids. 8 16 20 25 lbs. $4.00 6.00 7.50 9.00 each. 1962. —Decanting Jars, for Collodion. 1963.-Ditto, Syringes, glass. Each,.25 to $1.00 1964.-Ditto, Tubes, 6in. long,'in. bore, both ends smooth, for decanting small quantities of liquid at a time, so not to disturb the sediment. Ea.,.05 1961 Decimal Scales. See Centimetre Measures. Decigallon Measure. See Metrical Equivalents. Decoction Strainers. See Emulsion Mortars. Decomposition of Water Apparatus. See Water Decomposition. 1965.-Deflagrating Covers, of Tin. n Each,.10 1966.-Ditto, ditto, with spoon. ".25 1967. —Ditto, ditto, and hook. ".20 1968.-Ditto, ditto, of brass. ".50 1969,.-Ditto, ditto, with spoon. ".75 1970.-Ditto, hooks. ".05 1971,-Ditto, Globes, for burningr phosDhorous and oxygen gas. 1969 1970 1971, 1972, 1974 9 12 15 in. 1.25 g2.25 3.25 each. Ditto, Jars. See Bell Jars. 1972 — Ditto, Stands, or tripods of Iron, to support the deflagrating globe when reversed. Each, $1.00 OF CHEMICAL AND PHYSICAL APPARATUS. 65 1973.-Deflagrating Taper Holder, or socket..A0 1974. —Ditto, Cup, on metallic stand, with heavy iron foot, for holding phosphorous, to burn under an inverted globe containing oxygen gas. $1.50 Dentists' Furnace. See Furnaces. 1975.-Dessicators, of glass, composed of a small glass jar, roughed on the top, and a fiat ground glass cover. Each, $1.00 1976 1977 _~'1979 1982 1983 1985 1981 1976.-Ditto, composed of two 16-ounce jars, nicely ground and cut glass, with their necks ground together, for drying substances in a confined atmosphere over sulphuric acid; also for cooling crucibles before weighing, fiat, polished top. Each, $2.50 1977.-Ditto, ditto, round top. " 2.00 1978.-Dessicating Apparatus, consisting of bell jar, resting on a flat glass slab, containing a porcelain acid dish and porcelain capsules, or watch glasses 6 8in. $3.00 5.00 each. Ditto, Baths. See Drying Baths. 1979.-Dessicator, oblong, consisting of glass plate, tray, and oblong bell receiver, ground to fit exactly, to keep substances dry while weighing. $2.00 1980.-Dessicators, Porter's. Each, 1.50 1981.-Ditto, Schritter's, to insert into the tubulure of an open mouth bell jar, for cooling substances in dry atmospheric air at ordinary atmospheric pressure. $1.50 Dessicating Ovens. See Drying Ovens. 1982.-Ditto, Pans, three partitions, 5 inches diameter. Each, 1.25 1983. —Ditto, Pans, six partitions. 41 5~ 6~ in. diam. $1.15 1.30 1.50 each. 66, E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 1984.-Dessicating Plates, porcelain, perforated, 5 to 6 inches. Each,.75 1985. —Ditto, ditto, earthen, perforated, 3 to 5 inches, for drying crystals, etc. Each,.50 1986. —Ditto, ditto, porous, 3j to 5a inches. " 50 1987.-Ditto, Apparatus, Fresenius', complete. $20.00 1988.-Ditto, ditto, Fresenius', for drying at 100 deg. Celsius, consisting of a copper water bath, drying tube, a flask to contain sulphuric acid, etc. $7.50 1992 1989 1990 1995 1999 2002 1989.-Dialyser. Small,.50 Large,.75 1990.-Ditto, with jar fitted, extra. $1.25 Diamond Models. See Crown Diamonds. Ditto, Jar. See Electric Diamond Jar. 1991.-Ditto, Sparks, for burning in oxygen Prices vary according to the size and quality required. 1992.-Diamonds, for glass cutting, whole set of keys, complete. Each, $5.00 1993.-Ditto, for writing on glass, with bone handle and silver ferule. Each, $3.00 1994.-Ditto, ditto, with ivory handle. " 6.00 1995.-Ditto, ditto, with larger spark, size No. 1. " 7.50 1996.-Ditto, ditto, with still, larger spark, size No. 2. " 12.00 1997.-Ditto, ditto, with very long spark, fine ivory handle. Each, $20.00 1998.-Diamond Mortars, of steel, as used in blow-pipe analysis for crushing minerals, Plattner's usual form. Each, $5.00 1999. —Ditto, ditto, with brass collar and screw to prevent any escape of the powder when choice specimens are being crushed. Each, $7.50 2000.-Differential Thermometers, Leslie's, with glass connections between each limb and stopcock in the center. Each, $4.00 2001.-Ditto, ditto, plain. $2.50 to 3.50 OF CHEMICAL AND PHYSICAL APPARITUS. 67 Decomposition of Water by Galvanism. See Bunsen's Apparatus, under Apparatus. 2002.-Digestors, semi-Berlin, flat bottom, 2 in. diam'r. Each,.12 2002 2005 2006 2012 2003.-Ditto, Meissen. Each,.18 2004.-Ditto, Royal Berlin, with oval bottom, flaring top. Each,.50 2005.-Ditto, Plattner's, flat bottom, flaring top. 52 2 4 in..25.30.50 each. Ditto. See also Evaporating Kettles. 2006.-Dippers, hammered copper, without i seam, round, iron handle, 1 litre capacity. Each, $2.00 2007 2008 2007.-Ditto, iron, for pouring metals in assay. Bowl, 3 in. 5 in. diameter..40.50 each. 2008. LDitto, tinned, shallow, with long handles, for pouring. 5 51 6 in..60.70.80 each. Ditto, porcelain. See Casseroles. 2009.-Dipping Needle, small, with brass support. $1.50 2010.-Ditto, ditto, larger. Each, $2.25 to 5.00 2011.-Dishes, iron, countersunk, tinned, French, conical shape, with handles on either side, used for boiling sacharine matter, 5 in. deep and 10 in. diameter. Each, $1.50 2012.-Ditto, earthen, deep, round, and flat bottom, for holding acids and acidulous solutions. Imported to order. 10 15 20 gallons. $10.00 12.00 15.00 each. 2013.-Ditto, porcelain, round, with lip, for receiving the ashes of the burning filter. Each, $1.00 2014.-Ditto, ditto, smaller, without lip..75 68 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2015.-Dishes, Draining, porcelain, to stand under bottles containing acids or other liquids. 2 2~ 21 3 31 4 41 5 in..08.10.12.15.18.20.22.25 each. 2016.-Ditto.Roasting, of porous clay, sizes, 1~ in. to 10 inches. Per doz.,.75 to $5.00 2017.-Displacement Apparatus, consisting of a funnel and bottle fitted by means of a cork. 1 2 litres..60.75 each. 2018.-Ditto, ditto, consisting of a separatory funnel fitting into a glass receiver by means of a tightly fitting cork. pts. qts. 4 gall. $2.50 3.50 4.50 each. 2019 2021 2022 2023 2019.-Ditto, ditto, with ground joint of light blown glass, without stopcock, 6 ounces..75 2020.-Ditto, ditto, of glass, consisting of separatory funnel, fitting into a glass receiver with ground joint. pts. qts. i gall. $4.00 5.00 6.00 each. 2021.-Ditto, ditto, consisting of a separatory funnel, by a glass ground joint fitted into a separatory bottle, with a ground glass stopcock at foot. pts. qts. 4 gall. 1 gall. $6.00 7.00 8.00 12.00 each. OF CHEMICAL AND PHYSICAL APPARATUS. 69 2022.-Displacement Apparatus, Guibourg's, consisting of an oblong glass vessel, stoppered, and with stopcock in the tube, fitted by a ground glass joint into a receiver having ground stopcock at foot; capacity of receiving vessel, 1~ gallons. Each, $12.00 2023.-Ditto, ditto, ditto, with a communicating tube between the displacer and the receiver. Each, $14.00 The joints of the foregoing apparatus are double ground with the finest emery. 2024 2026 2024.-Distilling Apparatus, for distilling water, spirits, oil, etc., consisting of a polished copper countersunk still, tinned inside, and a worm of. block tin enclosed in a tub of zinc, having a receiving and discharging tube. 1 2 3 5 galls. $12.00 16.00 20.00 30.00 each. 2025.-Ditto, ditto, nickleized. 1 2 3 5 galls. $14.00 19.00 25.00 35.00 each. 2026.-Ditto, with water bath, having a tight fitting water joint and jacket, steam escape, water supply pipe, with thermometer, and extra handles. 1 2 3 5 10 galls. $24.00 32.00 40.00 60.00 80.00 each. Ditto, ditto, Mttrrle, for the use of pharmaceutists and chemists, complete. See Mitrrle's Apparatus, at the close of this volume. 2027.-Distilling Flasks, for fractional distillation. Per doz., $1.50 2028.-Ditto, Apparatus, of iron, with safety valve. pts. qts. 1 gall. $3.75 4.50 6.00 each. Ditto, Retorts. See Retorts. 2027 70 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE i / 2029 2031 2032 2033 2029.-Distilling Apparatus, Wurtz's, for fractional distillation, complete, with thermometer. $10.00 2030.-Ditto, ditto, glass part only. 2.50 2031.-Doebereiner's Hydro Platinic Lamp, for generating hydrogen, and producing an instantaneous light by throwing a jet of the same upon a piece of spongy,platinum; a very convenient lamp for smokers, etc., of German embossed glass. $2.50 2032.-Ditto, ditto, of German plain glass. 3.00 2033.-Ditto, ditto, French form, having a small lamp attached which is thrown before the light by the same movement by which the jet is projected; plain. $7.00 2034 2035 2040 2041 2041A 2034-Ditto, ditto, vase shape. 10.00 2035.-Dome, porcelain, for Bunsen's lamp. 1.00 Douceleur Apparatus. See Apparatus. Drainers. See Crystal Drainers. 2036.-Drawing Tools, in a small box. containing dividers, pencils, etc. $1.00 to 4.00 Of CREMICAL AND PHYSICAL APPARATUS. 71 2037. -Drawing Curves. Each,.25 2038.-Ditto, Protractors, horn. ".75 2039. —Dropping Glasses, Schuster's, plain. ".20 2040.-Ditto, ditto, with ground stopper. ".25 Ditto, Bottles. See Acid Bottles. 2041.-Ditto, Pipette, with bulb top, covered with rubber film, graduated 100 c.c..75 2041A.-Ditto, Pipettes. See Pipettes. 2042. —Ditto, Tube, plain, 4 to 10 inches. Each,.10 to 25 Drying Apparatus. See Dessicating Apparatus. 2043.-Drummond Lamp, new French form, for petroleum. $15.00 2044 2052 2054 2044.-Drying Baths, copper, 10 inch, with double walls and two tubulatures, one for thermometer and the other for escape, including thermometer. Each, $15.00 2045.-Ditto, ditto, soft, soldered. 8 10 12 inchs. $9.00 13.50 18.00 each. 2046.-Ditto, ditto, 8 in. with thermometer. " 10.00 2047.-Ditto, ditto, 10 inch. " 15.00 2048. —Ditto, 12 inch. " 19.00 2049.-Ditto, ditto, nickleized. Each size additional. 2.00 2050.-Ditto, ditto, of tin. Each, 2.50 2051.-Ditto, ditto, porcelain, for drying filters over hot water. Each, $1.00 2052.-Drying Bath Regulator, Kemp's, improved. " 3.00 2053.-Ditto, ditto, with Bunsen's late improvement, consisting of an additional spring to steady the pressure of the mercury. Each, $3.50 72 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2054. —Drying Bath Electrical Regulator, for keeping the heat of the water bath constantly at an even temperature. 2055.-Ditto, Bottles, Barker's, small size. Each, $1.00 2056.-Ditto, ditto, large size. " 1.50 2057.-Ditto, Oven, or hot air bath, having single walls and detached perforated shelf on legs, 8 inches. $7.00 2059 2058 2030 2058.-Ditto, ditto, with thermometer. $8.50 2059.-Ditto, ditto, Rammelsberg's conical shape, of copper, hard, soldered, having detached shelf. Small size, larger size, $3.00 4.00 each. 2060. —Ditto, Plates, porous clay. Each,.50 2061 2062 2061.-Ditto, Tubes, Liebig's. Each,.50 2062. —Ditto, ditto, Mitscherlich's. ".60 2063.-Druggist Mill, for grinding roots, herbs, etc. $]5.00 2064.-Dutch Metal. Per book,.10 2065.-Dyers' Cloth, for mordaunting. Per yard, $2.00 Dye Pots. See Deep Casseroles. Earthen Dishes, perforated. See Dishes, Dessicating Apparatus. OF CHEMICAL AND PHYSICAL APPARATUS. 73 2066 ELECTRICAL AND GALVANIC APPARATUS. HOLTZ'S wonderful Induction Electrical Machine as improved by BORCHARD, and first brought into the United States for sale, by myself, in 1869. It is the most wonderful discovery, in regard to the length of the spark yet known-a spark 6 in. long having been obtained from a 12 in. plate machine, and glass perforated 1f in. thick. The remarkable machine, imported by myself, now in the possession of Prof. Blake, of Brown's University, has a 30 in. plate, and has produced a spark about 16 in. It was the result of the combined intelligence of Messrs. Holtz, Poggendorf, Rienz, and Dove; was manufactured expressly for me by Mr. Borchard, and is believed to be the best single machine of the kind in the world for practical purposes. It must be borne in mind that the machines I import are all nade for mne by the inventor, and the secret of the long spark has never yet been discovered by the greatest savans in Europe, and I presume that it will not be questioned but that those made by the inventor HIIMSELF must inevitably be far superior to any imitations or copies; nevertheless, should my customers desire them, I am prepared to furnish imitations of this celebrated machine as low as any house in America. It should be borne in mind that these machines, with the extra appurtenances, can illuminate large Geissler tubes, pierce thick glass, show rotation by electricity, manufacture Ozone, etc. They are light and portable, and easily excited by the use of a sheet of hardened vulcanized rubber and a cat skin, and when once excited, are well known to retain their electricity from four to five hours. The new and 74 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE ingenious collecting and condensing apparatus, invented by C. Van Brunt, Esq., of this country, consisting of a multiplication of the points for the collection of electricity, and a tin foil condenser, as described in the journal of Franklin Institute, may be attached to this machine at my establishment. 2066.-Single machines, Borchard's make, 30 in. plate. $225.00 2067.- " " " " 24 in. " 175.00 2068.- " " "20 in. " 140.00 2069.- " " " " 18 in. " 100.00 2070.- " " " " 14 in. " 65.00 2071 2071.-Double machines, Borchard's make. 2072.-Dielectric Machine, as constructed by M. Carre, having revolving wheels of hardened rubber, the electricity being supplied by friction on stationery rubbers located in front, so that electricity may be generated in every kind of weather. This machine is the most simple and powerful of the static conduction machines; being scarcely affected by atmospheric moisture, it becomes charged in a few seconds, and sustains its action indefinitely. With induction plates from 44 to 60 OF CHEMICAL AND PHYSICAL APPARATUS. 75 Electricity. — Continued. centimetres, it gives a constant flow of sparks from 12 to 28 centimetres; it illumainates brilliantly Geisler tubes of over a yard connection; it pierces glass from 8 to 12 millimetres thick; in less than a minute the medium size machine will charge to overflowing a battery of 12 large jars, etc. It also performs the usual experiments of large coils, etc. The price of a small machine giving from 30 to 40 millimetre sparks, is $30.00 2072 2080 2087 2073.-Dielectric Machine, No. 1, plates 32 to 44 millimetres. $125.00 2074.-Ditto, No. 3, " 44 to 60 "200.00 2075.-Plate Electric Machine, with prime conductor of brass, and supported by pillars of glass, plate 24 in. diameter. $65.00 2076.-Ditto, 20 inches. 45.00 2077.-Ditto, 16 " 35.00 2078. —Ditto, 12 " with japanned prime conductor. 25.00 2079.-Electrophorus. 9.00 2080.-Pith Ball Electrometer. 1.00 2081. —Gold Leaf C" 6.00 2082.-Head of Hair. 1.50 2083.-Leyden Jar, pint. 1.50 2084.-Ditto, ditto, quart. 2.00 2085. —Ditto, ditto, 1 gallon. 2.75 2086.-Ditto, ditto, 1 gallon. 3.25 2087.-Set of Leyden Jars. 6.50 76 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Electricity. —Continued. 2088.-Electrical Batteries, in walnut boxes. 4 6 12 qt. jars. $11.00 16.00 28.00 each. (Other sizes in proportion.)'Mr 7i 2088 2089 2090 2099 2101 2089.-Diamond Jars, 2 quarts. Each, $4.00 2090. —Plain Discharger, glass handle. 2.25 2091.-Jointed Discharger. 5.00 2092.-Universal Discharger. 10.00 2093.-Electrometer Jar, quart. 2.50 2094.-Leyden Jar, with movable coatings. 3.50 2095.-Ditto, ditto, with bells, 6.00 2096.-Electrical Bells, 2 bells. 2.00 2097. —Ditto, ditto, 3 bells. 3.00 2098.-Hiero's Fountain. 18.00 2099.-Electrical Flier. 1.25 2100.-Insulating Stool. 5.00 2101.-Spotted Tube. $3.00 to 5.00 2102.-Luminous Plate. 2.00 to 2.50 2103.-Illuminating Egg Stand. 2.00 2104.-Amalgam. Per box,.40 2105.-Biot's Hemispnere, for showing electricity resides only on the surface. $8.00 2106.-Metallic Plates, for dancing figures to suspend. 1.25 2107.-Ditto, ditto, on insulated stand. 6.50 2108.-Ditto, ditto, larger, with double columns. 12.00 2109.-Thunder Houses, mahogany. 8.00 2110. —Gas Pistol. 1.25 2111.-Dancing Images, per pair, 1.00 OF CHEMICAL AND PHYSICAL APPARATUS. 77 Electricity.-Continued. 2103 2108 2112 2121 2112.-Electrical Orrery. $4.50 2113.-Pith Balls, per dozen,.25 2114:.-Electrical Sportsman, Jar and Bird. 6.00 2115.-Ditto, Pistol. 2.50 2116.-Miser's Plate. 2.50 2117.-Rod of Glass, for illustrating vitreous excitation. 1.00 2118.-Ditto, Shellac, for ditto, ditto. 2.00 2119.-Galvanometer, Astatic. 15.00 2120.-Ditto, Tangent. 10.00 2121.-Ditto, Sensitive. $35.00 to 60.00 2125 2122 2123 2126 2122.-Thermo Electric Pile. $35.00 2123.-Contracting Helix. 5.50 2124. —Helix on Stand, 3 poles. 4.50 2125.-Ditto, with ring armature, or magic circle. 6.00 78 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Electricity.-Continued. 2126.-Page's Revolving Electro Magnet. $8.00 2127.-Model of Telegraph, with spool and signal key. 8.00 2128.-Telegraph Clock-work. 45.00 2129. —Induction, or Ruhmkorff's Coils, capable of throwa very small spark. $7.50 2133 2140 2140 2130.-Ditto, ditto, ditto, i in. spark. $12.00 2131. —Ditto, ditto, ditto, i in.,i 15.00 2132.-Ditto, ditto, ditto, j in.,, 30.00 2133.-Ditto, ditto, ditto, 1 in., with contact breaker. 60.00 2134. —Ditto, ditto, ditto, 2 in. " " 100,00 2135.-Ditto, ditto, ditto, 4 in. " cc 200,00 2136.-Ditto, ditto, ditto, 6 in: " *' 300.00 2137.-Ditto, ditto, ditto, 9 in. " cc 400.00 2138.-Ditto, ditto, ditto, 12 in. " cc 500.00'2139.-Current Changers. Each, $3.50 to 10.00'2140.-Geissler's Tubes, plain, each tube marked with the name of the gas it contains. Prices, from $1.25 to 30.00'2141.-Ditto, ditto, for use with the spectroscope. Each, 3.00 OF CHEMICAL AND PHYSICAL APPARATUS. 79 Electricity.- Continued. 2142.-Ditto, Vacuum Tubes, in which the vacuum is so perfect that the current will not pass. Each, $6.00 2143.- Ditto, tubes in form of a rose. $6.00 to 1S.00 2144.- Ditto, ditto, form of a lyre. Each, 7.00 2145.-Ditto, ditto, form of a star. " 5.00 2146.-Ditto, ditto, form of a U, very brilliant. " 9.00 2147.-Ditto, ditto, form of a Marguerite. " 5.50 2150' 2150A 2148.-Geissler's Tubes, form of a cross. $5.00 to 7.50 Various other forms; single and double spirals, conical and fiat spirals, filled and empty. These tubes were selected by myself in my late trip to Europe, and are of the very best make, and brilliant color. 2149.-Geissler's Tube, filled with mercury, showing the effect of phosphorescent light by friction. $5.00 2150.-Geissler's Tubes, Reflectors, showing small tubes, and multiplying the number by reflection. Each, $5.00 2150A.-Geissler's Tube Revolving Apparatus, for revolving Geissler's Tubes, by the use of Electricity. The magnets cause the motion to be uniform and regular. Price, $20.00 2151.-Geissler's Tube Supports, of brass, on mahogany base, with shifting clamps to hold different size tubes. Each, $10.00 80 E, B. BENJAMIN'S DESCRIPTIVE CATALOGUE Electric Batteries. Salts of Mercury for Batteries. See Chemicals. K 11ll221 62r 2151 2152 2162 2152. —Bunsen's large Cells, with rolled zinc plates in. thick and French sawed carbons, jars 8 in. high. Each, $5.00 2153.-Ditto, ditto, ditto, jars 6 " " 3.50 2154. —Ditto, ditto, ditto, jars 5 " " 3.00 2155.-Daniel's Batteries. " 2.50 2156. —Grove's ditto. " 2.50 2157.-Smee's ditto. " 2.50 2161 2158.-Leclanche's Constant Battery, consisting of a rod of carbon placed in a porous pot, which is then packed tightly with a mixture of peroxide of manganese and coal, outside of which is a glass jar, in a corner of which is placed a rod of zinc. The exciting liquid is a solution of sal ammoniac. This battery is now the most popular one of its.kind in both Germany and France. OF CHEMICAL AND PHYSICAL APPARATUS. 81 Electricity.- Continued. 2159.-American Bichromate Battery, improved pattern, quart cells. $7.00 2160.-Ditto, ditto, pint cells. 5.00 2163 2164 2161.,u-Six cells of the larger battery, with connections complete, artanged in black walnut box, with partitions and handles, convenient for removing on and off the lecture table. $40.00 The foregoing arrangement of batteries is the most convenient, cleanly, and available form in use. It is arranged for the employment of one solution, which can be kept readily prepared at hand in a tight, ground stoppered bottle. When the battery is not in use, the zinc may be raised above the solution in the jar (which should be only half-filled with the same); and when the operator desires to renew the contact, the zinc is simply plunged into the fluid by pressing down the sliding rod. The top of the battery being always closed by a tight-fitting brass cap, no offensive fumes can escape to influence chemicals or the atmosphere in the vicinity. The operator will readily perceive that one cell can be employed alone, or any number to the extent of six. The seasonable employment of the sliding rod obviates any danger of shocks in connecting or disconnect 82 ) E. B. BENJAMIIN'S DESCRIPTIVE CATALOGUE Electricity.- Continued. ing apparatus with the battery; the power of this battery combined is about equal to that of ten Bunsen's large cells, and the carbon and zincs can be connected or alternated at pleasure. 2162.-French form, ditto, large size, holding about 2 litres. $10.00 2163.-Bunsen's Dipping Battery, consisting of 6 cells, zincs and carbons of which are raised and lowered by pulleys. $40.00 2164.-Ditto, ditto, consisting of two large 3-gallon cells, each cell having five zincs and carbons alternated, the whole raised and lowered by windlass crank. $50.00 2165.-Ditto, ditto, three large cells. 65.00 2166 2166.-Ditto, Medico-Electric, for use of Physicians and paralytic persons. $12.00 2167.-Electro-Thermal Battery, of bismuth and antimony, oblong shape, with jointed support. $30.00 2168. —Electrical Lamps, Duboscq's, with clock-work and reflectors, complete. 2169.-Ditto, ditto, Serrln's, French, with clock-work, complete, large size. $450.00 2170.-Ditto, Browning's, with automatic regulator, and movement to adjust the height of the carbon-poles while burning, very useful in showing spectra in screen experiments. $30.00 2171. —Ditto, regulated by hand, with reflector. 15.00 2172.-Ditto, enclosed in a dark chamber, with reflector. $20.00 2173.-Electrical Apparatus, with clock-work, for changing the current from one battery to another, without disconnecting. $50.00 OF CHEMICAL AND PHYSICAL APPARATUS. 83 Electricity.-Continued. 2174.-Electrometer, Thompson's, with scale and screen, as improved by Kirchoff. $75.00 This new and unique form of Electrometer is deserving of attention, on account of its extreme delicacy and facility of indication of very small amounts of electricity, which can also be quantitatively measured. Prof. Kirchoff has added a valuable and interesting photometric attachment, rendering it a very easily read, and most complete instrument. It is certainly a great step in advance in the quantitative estimation of electricity, and is receiving great attention from the Physicists of the old world. (See illustration on next page.) 2168 2169 2175.-Elutriating Apparatus, Schultze's, for the mechanical analysis of soils, clays, ground ores, etc. Each, $5.00 2176.-Ditto, Noebel's Apparatus, for washing soils in analysis. Each, $4.50 2177.-Ditto, ditto, with support. - ".50 2178.-Ditto. See Decanting Jars. 84 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2171 2174 2175 2179. —Enamels, French, for enameling jewelry. For gold enamel, white. Per oz. $1.00 2180.-Ditto, ditto, black. " 1.25 2181.-Ditto, for enameling gold-transparent blue, green, cerulean blue, lapis lazuli, opaque green, and transparent yellow. Per oz. $1.50 2176 2182.-Ditto, ditto, turquoise. Per oz. $3.00 2183.-Ditto, ditto, transparent red. " 7.50 2184.-Ditto, ditto, for enameling copper; deep red, blue, lapis lazuli, turquoise, dark green, transparent violet. Per oz..25 2185.-Ditto, ditto, for ditto; black, transparent green, clear yellow, deep yellow. Per oz..50 oF CHEMICAL AND PHYSICAL APPARATUS. 85 2186.-Enamelers' Files, of hardened steel, for cutting round glass tubes. Each, $1.50 2187.-Ditto, Knife, cocoa handle..50 2188.-Ditto, Plates, of refractory clay. 41 4- a5s 5~ in..15.18.20.25 each. 2189 2190 2191 2194 2189.-Endtosmosis, apparatus for diffusion of gases, without stand and bell-glass. $1.50 2190. —Eolipile, or Ether Jet, glass apparatus, for showing combustibility of the vapor of ether..50 2191.-Ditto, Lamp, or Spirit Blast blow-pipe of brass, with vertical jet. Each, $2.00 2192.-Ditto. ditto, of tin. " 1.00 Eprouvettes. See Test Glasses, and Specimen Tubes. Erdmann's Float. See Burette Swimmers. 2193.-Ethel Distilling Apparatus, consisting of a glass retort, receiver, alchohol reservoir, etc., capacity of retort, 1 qt. 2 qts. 1 gall. 2 galls. $3.85 5.50 7.15 10.00 each. Ether Bottles. See Bottles. 2194.-Ditto, Extraction Apparatus, Bohemian, capacity of receiver. 2 gallons. Each, $14.00 2195.-Ditto. ditto. See also Displacement Apparatus. 2196. —Euoiometer, Bunsen's, 500 millimeters in ~. $3.50 86 E. B. BENJAMIX'S DESCRIPTIVE CATALOGUE 2197 2196 2204 2198 2199 2200 2201 2202 2197.-Eudiometer, Hoffman's, V shape, mounted. $7,00 2198.-Ditto, Large Lecture, Hoffman's, mounted on stand. 15.00 2199.-Ditto, Hoffman's, with two parallel limbs, one sealed and one open. $2.00 2200.-Ditto, ditto, with parallel limbs, one sealed, and one drawn at the top. $2.50 2201. —-Ditto, ditto, with two parallel limbs and one stopcock at the bottom. $3.50 2202.-Ditto, ditto, with two parallel limbs and one stopcock at the top, and one at bottom. $4.00 2203.-Ditto, Ure's, straight, 200 c. c. in 2. 2.00 2204.-Ditto, ditto, U form, 60 c. c. in i. 3.50 OF CHEMICAL AND PHYSICAL APPARATUS. 87 Evaporating Dishes, of glass, straight sides and flat bottoms. See Crystallizing Dishes. 2205.-Ditto, Bohemian glass, round bottom, nests of 4. $1.25 2206 2208 2210 2213 2216 2206.-Ditto, ditto, ditto, lipped, in nests of 6. 1.50 2207.-Ditto, ditto, of iron, glazed inside and out, with lip, deep and hemispherical. 5 6 7 in. $1.25 1.35 1.75 each. 2208.-Ditto, of platinum. 2 21 3 in. According to quantity, per gramme,.35 to.40 2209.-Ditto, silver. 2 21 3 in. Per oz., $4.50 2210.-Ditto, of Royal Berlin porcelain, with spout glazed inside and out, except the bottom. Nos. 00 0 1 2 3 4 5 6 7 Diam. 1 oz. 2 3 4 6 8 10 14 24.18.22.28.35.40.45.62.75.95 8 9 10 11 45 oz. 2 qts. 3~ 6 $1.30 2.00 3.00 3.85 each. 2211.-Ditto, ditto, nests of 7, from 00 to 5. $2.25 2212.-Ditto, ditto, nests of 6 to 11. 11.00 2213.-Ditto, ditto, Royal Berlin, without lip, 3 inches diameter. Each,.20 2214.-Ditto, of glazed, Royal Saxon, without lip. 2 in. 3 in..15.35 each. 2215.-Ditto, ditto, with lip glazed, inside and out. Nos. 5 4 3 2 1 0 00 000 $1.10 1.40 1.75 2.00 2.75 4.00 6.00 10.00 each. 2216.-Ditto, ditto, Royal Berlin, porcelain, shallow form and flat bottom, stout, glazed throughout, except the bottom, with spout. Nos. I 2 3 4 5 6 7 1 1~ 3 41 7 10 16 oz..22.30.35.42.50.66.83 each. 2217.-Ditto, full nests of the above. $2.75 88 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2218.-Evaporating Dishes, French, hemispherical, glazed throughout, except the bottom, of very thin white porcelain. 40 55 70 84 97 110 m.m..25.30.40.50.60.75 each. 2219.-Full sets of the above. $2.50 2220.-Ditto, thin semi-porcelain, watch-glass form, with spout, glazed inside. Nos. 1 2 3 4 5 6.15.18.20.25.30.40 each. 2221.-Full nests of above. $1.00 2222.-Ditto, ditto, deep hemispherical. Nos. 1 2 3 4 5 6 7 8 9 17 2 3 4 6 8 10 14 16 oz..15.20.25.30.35.45.50.55.70 each. 2223.-Sets of 6 of the above. $1.25 2224. —Ditto, 9 2. 5 2218 2225 2226 2227 2225. —Ditto, ditto, watch-glass form, stouter, glazed inside. An excellent dish for quick evaporation. Nos. 6 7 8 9 10 11 12 13 14 15 16 Cap'y.45.55.65.75.85 $1.00 1.30 1.75 2.10 3.50 5.00 ea. 2226.-Ditto, ditto, Thuringian semi-porcelain, lipped, and heavy rim around the top. Nos. 8 9 10 11 12 13 Ia 16 18 24 oz. 1qt. 1 2 3 1gall. 2 3 5.75.85 $1.00 1.20 1.75 2.10 3.50 5.00 9.00 each. 2227.-Ditto, semi-porcelain, flat bottom, round lip, and glazed inside and out, except the bottom. Nos. 4 3 1 $1.00 1.25 2.00 each. 2228.-Ditto, with rim around the top, sharp lip. 11 11i 12~ in. 2228 $1.50 1.75 2.25 each. Ditto, ditto. See also Capsules. 2229.-Ditto, or gold washing pans, 30 inch diameter, of Russian iron, countersunk. Each, $1.00 2230. —Ditto, ditto, or trays of lead, small. "'.50 OF CHEMICAL AND PHYSICAL APPARATUS. 89 2231.-Evaporating Kettles. 2 5 gallons. $3.50 8.50 each. Exsiccators. Fee Dessicators. 2232234 2240 2233 2232.-Eye Baths, of glass. Each,.25 2233.-Evolution Flask, funnel and delivery tube (without delivery flask). $1.25 2234.-Eye Models, for showing the reflec- l tion on the eye lenses, with the use of spectacles. Each, $15.00 Faraday's Retorts. See Retorts. 2235. —Files, enamelers', for cutting glass. Each, 1.00 1 2236.-Ditto, round, half round and flat. 4 5 6 7 in..20.25.35.40 each. 2237. —-Ditto, triangular. 3 4 5 6 8 in..18.25.30.40.50 each. 2238.-File Handles. Each,.10 2239.-Filtering Apparatus, porcelain. $8.00 2240. —]Ditto, ditto, Plantamour's, tin bath for hot water. $2.50 2241. —l)itto, ditto, of copper, with porous W strainer $1.25 2242. — Ditto, ditto, Beale's quick 75 2243. —-Ditto, ditto, for rapid filtration, by 2243 Prof. Bunsen's method, under atmospheric pressure. $11.00 90 B. B. BENJA3IIN'S DESCRIPTIVE CATALOGUE The foregoing apparatus has come into extensive use both in Europe and in this country: filters precipitates, etc., which, with the old method, would take, in many familiar instances, four to ten hours to filter properly, in a tenth of the time taken by the old method. Alluminous, Sillicious, and ordinary sulphide of hydrogen precipitations, are quickly filtered from. So convenient and useful has it become, and so generally recognized by the profession, that it is considered almost an indispensible requisite of every laboratory. The illustration shows the arrangement of this pump; full description of the method of employment of this apparatus, and several of its excellencies may be found in Johnson's latest edition of Fresenius's Quantitative Chemical Analysis, from which I extract the following observations, and I have recently introduced an improvement in the working of this apparatus, by which the filtrate may be received directly into a beaker, for the suggestion of which I am indebted to Dr. Gibbs, of Harvard College. "' This apparatus is screwed down on a board fastened to the wall, in such a manner that each separate piece of the apparatus is held by a single fastening only, in order to prevent the tubes from being strained or broken by the possible warping of the board. On opening the first pinchcock, the water flows down the discharge to a depth of thirty feet, carrying with it the air which it sucks through the upper tube. The second pinchcock is used to regulate the flow of the steam, whenl the first one is completely open. The discharge pipe should have a fall of about thirty feet, and be of a diameter of half-an-inch, and end in a sewer or some other arrangement, to convey the water away. The filtration is made in the following manner. The receiver standing in a metallic vessel is connected by a small glass or rubber tube, with the discharging tube on left of the illustration (having previously been fitted with filter). At first, the delivery is gradual, but in a moment or two the filtrate runs through in a continuous stream, often so rapidly that one must hasten to keep up the supply of liquid. "The Platinum Cone is placed in the bottom of the glass funnel, the dry paper filter then introduced in the ordinary manner, moistened, and freed from all adhering air bubbles by pressure with the finger. A filter so arranged, and in perfect contact with the glass when filled with a liquid, will support the pressure of an entire atmosphere without the least danger of breaking, and the interspace between the folds of the platinum foil is perfectly sufficient to allow of the passage of a continuous stream of water." 2244.-Filtering Apparatus, Bell Glasses, with tubulature at foot, for above. See Bell Glasses. For other appurtenances of Bunsen's quick filtering apparatus, see their appropriate heads in this Catalogue. 2245.-Filter, calico, a very strong and durable filter, conical, with folds. $2.50 OF CHEMICAL AND PHYSICAL APPARATUS. 91 2246.-Filter Dryer, of porcelain. $1.00 2247.-Filter Holders, japanned. Each, 3.03 2248. —Filter Hooks, of glass, to hang between the funnel and filter. Per doz..50 to.75 2249.-Filtering Rings, of unannealed wire. ".60 2250.-Ditto, ditto, porcelain, to attach to an upright stand, single arm. Each,.50 2251. —Ditto, ditto, ditto, with three arms, to place over a glass vessel when filtering into it. Each,.35 2252.-Filtering Flasks, extra stout, to bear pressure. ".50 Filter Covers. See Covers. Filter Stands. See Funnel Supports. 2253.-Filters, felt, conical shape, for filtering wines, etc. Nos. 8 12 16 $1.00 2.00 3.00 2248 2251 2253 2254. —Ditto, French, cut in a circular form, packs of 100 each, grey, genuine Prat-Dumas. Nos. 25 33 40 45 50 71 10 13 15 171 in..40.55.75 $1.00 1.25 per pack. Per 12 sheets, Nos. 80 100 26 38 in..75 $1.00 2255.-Ditto, ditto, white, in packs of 100. 2 3 4 5 6 7~ 15 161 in..15.20.25.35.45.55 $1.25 1.50 per pack. 2256.-Filtering Paper, white, French, 15x18. Per ream, $4.50 2257.-Ditto, ditto, Berzelius's, similar to Swedish, but firmer. Per quire,.75 2258. —Ditto, ditto, Chardin, exceedingly stout and heavy, for making filtering pulp. Per sheet,.20, per ream, $30.00 2259. —Ditto, ditto, best German laid paper, extra heavy, 19x22. Per quire, 65, per ream, $9.00 92 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE PER QUIRE, PER REAM. 2260.-Filtering Paper, letter A, laid, 19x22,.60, $7.00 2261.-Ditto, ditto, " B, wove, 18x21,.50, 6.50 2262.-Ditto, ditto, " C, laid, 15~x18~,.40, 4.50 2263.-Ditto, ditto, " D, wove, 16x19,.40, 4.55 2264.-Ditto, ditto, " E, wove, 15x19,.35, 4.00,2265.-Ditto, ditto, Swedish, genuine, having the water-mark J. C. Munktell, as recommended by Prof. Fresenius. Per quire, $1.50 2266.-Finger Tips, of rubber, to put on the fingers when handling acids, iodine, etc. Each,.10 2267.-Fire Syringe, producing instantaneous light by sudden condensation of air, of brass, 7 in. cylinder. $3.00 2268. —Ditto, ditto, of glass, with brass cap and piston. - $8.00 2267 2269.-Fire Clay. Per lb..05 2270.-Fittings, for evolution bottles. Each,.30 2271.-Ditto, for wash bottles. ".10 2273 2272.-Ditto, for Woolf's bottles. ".15 Flameless Lamp. See Aphlogistic Lamp. 2273.-Flasks, assay, or parting, long-necked, of hard Bohemian glass. Per doz., $1.50 2274.-Ditto, assay, conical, flat bottom, with projecting ring around them about two-thirds of the way front the base to the top, to prevent,! the tongs rom slipping when they are being lifted, thoroughly annealed, of best Bohemian! glass. Each,.50227 2276 2275.-Ditto, ditto, best Bohemian glass, with lip, without ring. Each,.50 2276.-Flasks, very best and genuine Bohemian, with vial mouth and flat bo.,om. 1 2 4 6 8 12 16 24 32 oz. $1.20 1.30 1.60 2.25 2.50 3.00 3.25 3.75 5.50 per doz. i 1 2 3 gall..75 $1.25 1.75 2.00 each. 2277.-Ditto, ditto, flat bottom, vial mouth, pear shape, for dentists, etc.; 2 gallons. Each, $2.50 ,OF CHEMICAL AND PHYSICAL APPARATUS. 93 2278 2279 2280 2281 2290 2278.-Flasks, round bottom, vial mouth, pear shape. 8 16 32 oz. I gall. $3.00 4.00 6.00 10.50 per doz. 2279.-Ditto, ordinary fiat bottom, with a ring around the neck to,. bear corking. 1to2 oz. 4 8 16 32 gall 2:.12.15.20.25.35.75 $2.00 each, $1.20 1.50 2,00 2.50 3.50 7.50 20.00 per doz. 2280.-Ditto, best Bohemian glass, flat bottom, pear shape, with ring around the neck. 4 8 16 32 oz. $2.50 3.25 4.25 6.50 per doz. 2281.-Ditto, round bottom, pear shape, with ring around the neck to bear corking. Prices the same as the foregoing. 2282.-Ditto, Rose's blow-pipe or "Reagirkelchen," of very small size, pear shape, with flaring mouth, for use with the blow-pipe. Per doz..60 2283.-Ditto, small, blown before the lamp, of best hard German glass, globular shape, light and thin glass, with fiat bottoms suitable for specific gravity. i i 1 oz..60.75 $1.00 per doz. 2284.-Ditto, best German "Florence," vial mouth. 2 4 8 16 24 32 oz. $1,25 1.60 2.25 2.75 3.25 3.75 per doz. 2285.-Ditto, of best Bohemian, with a tubulature half-way up the neck. 16 oz. qts. r7 $1.00 each. 2286.-Ditto, ditto, ditto, with tubulature on either side of the bulb.'1 gall. - $1.50 22.25 each. 2287 — Ditto, Bologna. Per doz.; $1.50 94 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2288.-Flasks, copper. 1 qt., $3.00; 2 qts., $4.50 each. 2289.:-Ditto, iron. Each, $1.00 2290. —Ditto, gas; of best Bohemian glass, bottle shape, with ring around the neck. 8 16 32 48 oz..35.40.50.60 each. Ditto, litre. See Litre Flasks, or Bottles. Ditto, oxygen. See Oxygen Retorts. Float, Erdmann's. See Burette Swimmer. Florentine Receivers. See Receivers. Forks, for gas burners. See Gas Burners. 1291 2293 2292 2294 2296 2298 2299 2301A 2300 2302 2291.-Foreeps, brass, ordinary, plain. Each,.50 2292.-Ditto, ditto, stout. ".75 2293.-Ditto, ditto, ends bent in parallel directions, with ivory tips. Each,.75 2294.-Ditto, jewelers, polished steel, square taper jaws. ".75 2295.-Ditto, ditto, heavier. $1.00 2296.-Ditto, ditto, unpolished, Stubb's, extra strong, for holding and crushing the button and minerals, in assay. Each, $1.25 2297.-Ditto, of polished steel, 7 inches long, and lined with cork. Each, $1.00 2298.-Ditto, steel, ordinary, small. ".25 2299.-Ditto, ditto, form No. 1. ".50 2300.-Ditto, ditto, form No. 2. ".50 2301.-Ditto, ditto, form No. 3, German silver point. ".75 2301.A-Ditto, steel, form No. 4, hardened rubber end. ".75 2302.-Ditto, ditto, form No. 5, German silver point. " 1.00 OF CHEMICAL AND PHYSICAL APPARATUS. 95 2309 231 2303 2306 2316 2314 2313 2303. —Forceps, steel, platinum point, ordinary German form. Each, $1.50 2304. —Ditto, ditto, ditto, German silver. " 1.75 2305.-Ditto, German silver, French shape, platinum ends. " 2.00 2306.-Ditto, steel, with extra heavy platinum points. " 2.50 2307.-Ditto, heavy brass,platinum ends. " 1.00 2308. —Ditto, wire, platinum points..75 2309.-Ditto, for breaking glass, heavy, of steel. ".75 2310.-Ditto, for bending wire, round ends, Stubb's. " 1.25 2311.-Ditto, for cutting wire. ".75 2312.-Ditto, brass, with spring. ".75 Fossils. See Minerals and Fossils. 2313.-Fountain in vacuo. 9.00 2314.-Formation of Water, apparatus for, produced by the combustion of hydrogen under a bell jar. $2.50 Fractional Distillation. See Distillation, Michro-Chemical Retorts, Flasks, etc. 2315.-Frames, for the charts and photographs mentioned in this catalogue, according to the styles required. 2316.-Freezing in vacuo, Leslie's apparatus. $3.00 to 6.00 {)0 E. B. BENJAMIN'S DESCRIPTIVE. CATALOGlE 2317 2319 2321 2323 2317.-Funnels, American glass. 2 oz. 4 8 16 32 gall. 1 gall..10.15.18.2a.35.50.75 each. 2318. —Funnels, best Bohemian glass, formed to an angle of 60~ all the edges ground evenly. 1 2 2j 3 3j: 4 4j 5 6 in..15.18.20 22 28.30 36.44.60 each. 2319.-Ditto, ditto, formed especially after a pattern, with bottom of a cone formed to a true angle of 60~, and having a stem with parallel sides, made expressly for Bunsen's quick filtering apparatus. 2 2j 3 4 Sin..20.25.30.40.50 each. 2320.-Ditto, ditto, fluted or ribbed, best imported ground tops. 2 3 4 5 in. 20.30.40.50 each. 2321.-Ditto, German glass, small, in nests of 3, largest 1 inch across the top. Per nest,.25 2322.-Ditto, ditto, angle 60~, tops unground. 2 3 4 5 6 in..12.15..20.25.30 each. $1.00 1.20 2.00 2.50 3.50 per doz. 2323.-Ditto, glass, long, bent stem, for filling retorts. 2 4 1 18 24 oz..35.40.50 65.80 each. 2324: —Ditto, separatory, of best Bohemian glass, conical, formed to an angle of 60~, with stopcock ground into the neck. 4 6 8 in. $2.50 3.25 4.50 each...... OF CHEMICAL AND PHYSICAL APPARAtUS. 97 23?4 2325 2326 2329 2331 2334 2335 2325. —Funnels, separatory, globe shape, stoppered. 1 qt. 2 qts. $3.50 4.50 each. 2326,-Ditto, ditto, globe shape, stoppered, small, with funnel tube for separation and use in volumetric an- 2335 alysis. Each, $1.25 2327. —Ditto, ditto, ditto, hemispherical, of light blown glass. Each, $1.00 232S.-Ditto, ditto, conical, formed on an angle of 60', stout Bohemian glass. Each, $1.50 2329.-Ditto, tubes, glass, with stopcock between the cone and the tube. Each, $1.00 2330.-Ditto, ditto, glass, with plug stopper ground into the neck of the funnel. Each, $1.00 2331.-Ditto, ditto, ordinary, conical, stout glass, length of stem, 18 20 24 in..15.20.25 each. 2332.-Ditto, ditto, conical, of light blown glass. 12 16 18 in..25.30.35 each. 2333.-Ditto, ditto, thistle top. 12 18 in..18.25 each. 2334.-Ditto, ditto, thistle top, bulb double the size of the above, tube 18 in. long. Each,.30 233a.- Ditto, ditto, Welter's safety thistle top, one bulb. Each,.30 2336 2336.-Ditto, ditto, ditto, 2 bulbs, 30 inches. Each,.40 98 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2337.-Funnels, tubes, Welter's, 3 bulbs. Each,.50 2338.-Ditto, ditto, ditto, conical top, 1 bulb. ".40 2339.-Ditto, ditto, ditto, " 2 " ".50 2340.-Ditto, ditto, ditto, " 3 " ".60 2341.-Ditto, ditto, ditto, short stem, thistle top, 2 and 3 bulbs. Each,.50 2344 2342 2343 2346 2342.-Ditto, ditto, Mitscherlich's form, of 2 limbs and safety bulb, and thistle top funnel in the center. Each,.50 2343.-Ditto, ditto, glass, Filling. ".50 2344.-Ditto, porcelain, safety, with bulb at the base of the cone. Each, 75 2345.-Ditto, ditto, conical, with loop handle at the side. 3 4 44 54 6 in..40.55.70.90 $1.00 each. 2346.-Ditto, ditto, filtering, with staves inside. 3 33 44 5~ 6 in..60.70 $1.00 1.40 1.70 each. 2347.-Ditto, ditto, percolating. Each, $3.50 2348.-Ditto, ditto, perforated, without stem. 3 31 4 41 5j -6 in..40.50.60.70 $1.25 1.50 each. 2349.-Ditto, ditto, ditto, with large holes to support cloth filters. 31 41 5 5~ 6+ 7~ in..50.55.80 $1.00 1.50 1.75 each. 2350.-Ditto, ditto, German, with handle. Each,.25 OF CHEMICAL AND PHYSICAL APPARATUS. 99 2351.-Funnels, gutta percha, conical. 3j 4~ 4` 5~ 7 7j in..60.75 $1.00 1.50 1.75 2.00 each. 2352.-Ditto, ditto, spherical, ~ gallon. Each, $5.00 Ditto, for hot filtration. See Filters. Funnel Supports. See Supports. FURNACES. 2353. —Furnace gas, Erdmann's, of fire clay, with tripod stand, without burner..75 2353'2355 2357 2354.-Ditto, porcelain, to surround Bunsen-> burner 1.00 2355. —Ditto, sheet iron, having 7 concentric rings on the top, mounted on three legs. $4.50 2356.-Ditto, with large Rose's burner. 10.00 The above apparatus is found very useful by apothecaries and in small laboratories for evaporations, hot mixtures, etc. Furnaces, for gas, small. See Stoves. Ditto, for kerosene. See Stoves. 2357.-Ditto, French, hand, clay. Each, $2.50 to 10.00 2358.-Ditto, Kent's, portable, sheet iron, small size, 17 in. high, of strong plate iron, lined with fire clay; it has six doors, the dome being hinged, that it may be more easily placed off or on; the openings are conveniently arranged for the reception of porcelain tubes; has a sand bath, water bath, a set of concentric rings, to receive a vessel as small as 31 inches in diameter. Each, $25.00 2359.-Ditto, Chamott. " 3.00 2360.-Ditto, cupelling, French, of refractory clay, bound with iron bands; it is composed of three parts withnnout the dome, :100 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE with scorifying, cupel and tube openings, and stop doors for the same,'complete. Nos. 1 2 3 4 $15.00 20.00 25.00 35.00 each. 2361 2358 2359 23G0 2362 2361.-Ditto, Hibb's patent, of heavy cast-iron, lined with fire clay, with- arrangements for the cupel muffle to extend through the center of the furnace, so the fire may extend all around it;' has separate opening for tubes and retorts; it is supplied with water bath, sand bath, concentric rings, etc. A very highly esteemed and convenient furnace, as it may be iused both for assay and heating purposes, and the muffle may be withdrawnat any time for examination., $50.00 2362.-Ditto, Perrot's gas blast of sheet iron, with a thick lining of fire clay, as per sectional illustration.. The blast is received: underneath, and gas supplied to nine large Bunsen's burners,; having the jets thrown to a common center; the supply of OF CHEMICAL AND PHYSICAL APPARATUS. 10 gas is regulated by a hand crank. When in operation, the concentrated flame is forced up through an opening at the bottom of the furnace, and completely surrounds the crucible resting on a pestle of fire clay, enclosed in an inner wall of the same material, which soon becomes superheated to such an extent that five pounds of gold may be melted in the short space of eight minutes. This valuable furnace is also used by enamelers, jewelers, dentists, etc. Nos. 1 2 $40.00 60.00 each. 2360 2364 2365 2364 2365 2363.-Ditto, No. 0, melting 500 grammes of copper at one time. $35.00 2364.-Ditto, a new French crown, for gas, composed of a large number of jets on a circular support, and surrounded by an iron frame, which reflects the heat, and at the same time supports the vessel to be heated. It is very highly esteemed by all the manufacturers that have used it. Nos. 1- 2 3 - $8.00 10.00 12.50 each. 2365.-Ditto, gas, Griffin's, for chemical operations at a white' heat; it is 2 feet high and 8 in. wide, consisting of a brass 102 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE cylinder open at the bottom, at the top of which are 16 Bunsen's burners fixed, having a gas supply pipe regulated by stopcock. It rests on an iron stool, to which the chimney is attached by means of braces. The furnace itself is a cylinder of fire clay resting on a fire clay sole plate, which is pierced to receive the fire from the burner; it measures 6 inches in height, 8 iffches outside diameter, and 5 inch bore. The crucible to be heated is supported on a perforated plumbago cylinder, and reaches within about an inch of the face of the gas burner. The dome, or roof of the furnace is carefully constructed so as to have a good draft; the consumption of gas when at work is 33 cubic feet an hour. $20.00 2366 2367 2368 2366.-Furnace and Lead Basin, for etching, with hydrofluoric acid on glass. $12.00 2367. —Ditto, enamelers, of French refractory clay, with large opening, for the use of enamelers, dentists, etc., in two parts, grates and stops for openings. INos. 1 2 $20.00 25.00 each. 2368.-Ditto, Chilton's universal, of heavy sheet iron, lined with fire brick, having moveable grate and ash box; it is so arranged OF CHEMICAL AND PHYSICAL APPARATUS. 103 that the pipe above the furnace slides up and down so as to permit the top to be removed, and the deep iron sand bath accompanying the furnace, to be put in the place of it. A set of cast iron rings accompanies the furnace, and the doors are suitably stopped. It is a very convenient furnace for all the purposes of a laboratory, such as melting, distilling, evaporating, cupelling, etc. $40.00 2369 2372 2369.-Ditto, or oven, Carius's, for heating substances, in sealed glass tubes. $12.00 2370.-Ditto, ditto, with Kemp's gas regulator, two thermometers and Bunsen's burner. $22.00 2371.-Ditto, Erlenmeyer, for two tubes. 7.50 2372. —Ditto, ditto, for four tubes. 9.00 2373.-Ditto, two thermometers, 1 gas burner, 1 gas regulator, extra. $10.00 2374.-Glass Tubes for ditto, heavy, strong, hard glass. 1.00 2375 2375.-Furnace Combustion, Bunsen's, improved, 25 burners, with stems, to turn on or off gas instantaneously. $60.00 Ditto, ditto. See also Combustion Furnaces. 2376.-Galactometer, consisting of a wooden standard, graduated with a tube attached to the same to receive the milk. $3.00 104 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2377.-Gallipots, French porcelain. i 1 2 4 8 16 32 oz. $4.00 4.25 4.50 8.00 10.00 12.00 15.00 per gross. 2378.-Ditto, German porcelain. i oz. ~ oz. $2.00 3.00 per gross. 2379.-Ditto, ditto, white porcelain, wood'en covers. 1 2 oz. $6.00 - 7.00 8.00 per gross. 2380.-Ditto, ditto, fine translucent porcelain, with cover of the same material, ~ ounce. Per gross, $18.00 2381.-Ditto, ditto, yellow clay, without,covers. i 1 Ii- 2 — 3 oz. $5.50 6.50 8.00 10.00 14.00 per gross. 4 6 8 12 16 oz. $16.50 30.00 40.00 50.00 60.00 " Galvanic Apparatus, for electro plating. See the back part of this book. Ditto, Batteries. See Electricity, under E. Ditto, Decomposing Cells, Bunsen's, Hoffman's, etc. See the back part of this volume. Galvanometers. See Electricity and Galvanism. Gas and Water Analysis, Apparatus for. See the back part of this book. Gas Bags, for air and hydrogen. See Balloons. 2382.-Ditto, of vulcanized rubber, oval..-. ~1 2 3 5 6 8 10 galls. $1.50 1.80 2.50 3.50 5.00 6.00 8.00 10.00 2383.-Ditto, ditto, with socket and stopcock additional. Extra, $1.50 2384.-Ditto, ditto, with socket and mouth-piece. ".7 2385.-Ditto, square and oblong, for holding oxygen, hydrogen,i etc., having cloth insertion, being well adapted to endure pressure, and warranted perfectly tight. - Size, 18x24 20x30 24x30 30x40 in, 15 25 35 55 galls. $6.50 8.75 11.00 13.50 each. 2386.-Ditto, ditto, with socket and stopcock. Extra, 32.00 2387.-Ditto, pressure boards for the above. Per pair, $10.00 Gas Bottles. See Bottles. OF CHEMICOL AND PHYSIUAL APPABATUS. 4105 2387 2392 2394 2394 2388. —Gas Bottles, fitted with cork, funnel tube and bent delivery tube. 8, 16 32 oz. o70.90 $1".25 each. 2389.-Ditto, ditto, fitted with perforated cork, funnel tube, connecting tube and wash bottle with connecting tube and bent delivery tube. 8 oz. 1 pt. 1 qt. $1.10 1.40 1.85 each. 2390. —Ditto, ditto, two necks, fitted with corks, funnel tube, and delivery tubes. pt. 1 pt. 1 qt. $1.00 1.50 1.75 each. 2391.-Ditto, ditto, with two-necked wash bottle.:pt. 1 pt. 1 qt. $1.80 2.30 2.80 each. 2392.-Ditto, ditto, Berzelius, with glass tube running to the bottom of the bottle and fitted by an air tight joint, and also having a lateral tube on the shoulder. $2.00 2393.-Ditto, ditto, Liebig's, with funnel, having plug stopper fitted with an air-tight joint and with delivery tube. 4 oz., $1.10 8 oz., 2.25 each. Gas Burners. See Burners. Gas Flasks, with tube on the side. See Flasks. 2394. —Ditto, with delivery tube sealed in the neck, for the manufacture of sulphuretted hydrogen. Each,.25 2395.-Ditto, consisting of an ordinary gas flask, fitted with safety funnel and delivery tube, for generating chlorine, etc. 1 pt. 1 qt.. gall..90 - 1.10 1.35 each. 106.E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Gas Furnaces. See Furnaces. 2396.-Gas Generator, Kipp's, for sulphuretted hydrogen, ordinary. form, with safety tube in top. $6.00 = ) 2396 2397 2397.-Ditto, ditto, Bohemian, with double concentric and inner stoppers. $7.50 2398.-Ditto, ditto, small, with safety funnel in top. 3.50 2399.-Ditto, ditto, for hydrogen, of copper, brazed, to hold 15 gallons. Price, including bell and fittings, $35.00 This is a first class apparatus, and will give an abundant supply for a large laboratory. 2400.-Ditto, ditto, sulphuretted hydrogen, Babo's, consisting of two bulbs, with open mouth, united by a semi-circular tube, for the prompt supply of gas in small quantities. Price, mounted, $2.50 The bulb, on therignt of the illustration, is half filled with lumps of sulphide of iron; the other bulb is partly filled with diluted sulphuric acid; the apparatus being placed on the support, revolves on the center, and can be fixed by the thumb-screw in any required position; when the bulb contaniing the sulphide of iron is raised above the other bulb, the acid is thrown back into the right bulb, and its action on the sulphide of iron ceases; otherwise, when this bulb is placed below, the sulphuric acid flows upon the sulphide of iron, and a continuous current of sulphuretted hydrogen gas passes off by the bent, glass tube, into the washing flask, and thence outward. When the apparatus is not in use, it is simply necessary to elevate the bulb containing the sulphide of iron and close the pinchcock on the flexible tube. OF CHEMICAL AND PHYSICAL APPARATUS.- 107 2400 2402 2403 2401. —Price of the glass part of the above apparatus, without wash bottle. Per doz., $12.00 2402.-Gas Generators, hydrogen, of glass. Each, 5.00 2403. —Ditto, ditto, of extra heavy, French crystal glass jar, containing bell shape gas holder, leaden tripod, stopcock, and gallow-screw connector. Height, 9 10~ 13~ 16 19 in. $10.00 12.00 15.00 20.00 25.00 each. 2404.-Ditto, for sulphuretted hydrogen, ". by the employment of asbestos. $1.00 2405.-Ditto, ditto, for Oxygen, of copper, double bottom, and iron top, carefully 240 secured. 1 qt., $4.50 ~ gall., 6.00 each. Gas Globes. See Deflagrating Globes. 2406.-Gas Holders, Pepys', made of japanned zinc, and having a glass tube on the side to indicate the quantity of gas in the gas holder. 10 galls. 15 galls. $20,00 25,00 each. 2407.-Ditto, ditto, of copper. 10 galls. 15 galls. $27.50 37.50 each. 2405 2408.-Ditto, ditto, for oxygen and hydrogen, containing 15 gallons of very heavy japanned zinc, withbells, complete. $70.00 108 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2406 2409 2409. —(as Ifolders, for oxygen and hydrogen, 23 gallons, new arrangement for holding the bells always in perpendicular position, mounted on castors, and having weights enclosed in a frame. $100.00 Gas Jars. See Bell Jars, Bell Glasses, etc. 2410. — Gasometer, Bunsen's mercurial, graduated to millimeters. $2.75 2411. —Gas Meter, large, with exposed indices, covered with glass, stopcock, pressure indicator, regulator, and delivery jet. $50.00 2412.-Gas Regulation Burner. $ 5.00 2413. —Gas Regulator, Kemp's, improved by Bunsen. $3.5o 2424.-Gas Pistols, japanned tin..50 2415.-Gas Pipettes, Ettling's, of glass. 2.00 Other Gas Apparatus. See Gas Analysis. 2416.-Gas Tubes, plain, small, 6 inches in length. Per doz., $2.00 2417. —Ditto, Bunsen's. 2416 25 in i 60 in I 100 in 4 200 in 1 $1.25 1.75 2.00 2.50 each. OF CHkLMICAL AND PHYSICAL APPARATUS. 109 2410 2419 2420 2418.-Gas Tubes, Bunsen's, a cubic inches in 10. Each, $1.75 2419. —Gas Washing Apparatus, consisting of two porcelain dishes, fitting the one into the other, with concentric shoulders. $5.00 2420.-Gasogenes, French, cane covered, for two bottles. Each, $7.50 2421.-Gauge Tubes, for steam boilers. Per lb. 1.00 2422 —Gauze, of brass wire netting, a, 10, 20, 40, 60, 80, and 100 meshes. Per square foot,.60 to.90 2423.-Ditto, of copper. ".85 2424.-Ditto, of iron. ".30 to.40 Geissler Tubes. See Electric Tubes. 2425.-Glass Blowers' Table, with sheet iron top, drawers, double bellows, and brass discharge pipe. $40.00 2426.-Ditto, ditto, of wood, with double bellows. 15.00 2427.-Glass Plates, colored, for examination of colored flames, assorted. 3x3 3x4 4x4 in..10.15.20 each. 2428.-Ditto, of fine French mirror glass, j inch thick. 3 4 6 8 9 10 12 in..25.35.60 $1.00 1.25 1.50 2.25 each. 2429.-Ditto, ditto, ground on both sides, 1 inch thick. 6 7 8 12 in. $2.00 2.25 2.75 8.50 each. See also Covers, glass. 2430.-Glass Ends, for burettes, drawn. Each,.05 110 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2436 2325 2437 2431.-Glass Pieces, small broken pieces. Per lb.,.25 2432.-Glass Rods, assorted sizes and qualities..60 to.75 Glass Tubing. See Tubing. 2433.-Glass Shades, furnished to order. 2434.-Ditto, feet, to ditto. Each,.40 to $4.00 2435.-Gloves, india rubber, of best manufacture, without seam, for handling acids and acidulous preparations. Per pair,' $5.00 See also Finger Tips. 2436.-Goniometers, Hauys', for measuring the angles of crystals, in morocco case. Each, $10.00 2437.-Ditto, Wollaston's, reflecting. " 30.00 2438.-Ditto, German, reflecting, with eye lenses to read the graduations. A very fine and accurate instrument. Each, $50.00,2439.-Graduate Glasses, for test purposes, not engraved, with glass foot. 1 2 4 8 16 32 oz..12.15.20.25.40.50.75 each.;2440.-Graduates, registered minims, German, vase form. 60 120 minims..50.75 each.,2441. —Ditto, English form, glass foot. 60 120 minims..50.75 each. 2440 2441 OF CHEMICAL AND PHYSICAL APPARATUS. 111 2442.-Graduates, registered, English shape. 1 2 4 8 16 32 oz..25.30.45.60 $1.00 1.50 each. 2443 2445 2446 2447 2448 2449 2450 2443.-Ditto, ditto, tumbler shape. i 1 2 4 6 8 16 32 oz..35.40.50.65.70.80 $1.50 2.00 each. 2444.-Ditto, ditto, French, carefully and accurately graduated. 8 12 16 32 oz. $1.00 1.25 1.7 2.2.5 each. 2445.-Ditto, porcelain. 8 16 oz. $1.00 1.50 each. Grain and Gramme Weights. See Weights. 2446. —Hammers, blow-pipe, Plattner's, usual form, square head, Nos. 2 and 3. Each,.75 2447.-Ditto, ditto, Freiberg style, octagonal, Nos. 1 and 4. " $1.00 2448.-Ditto, mineralogical, pointed at both heads, for trimming, No. 5. Each, $1.00 2449.-Ditto, ditto, one end pointed and the other flattened, No. 6. Each, $1.25 2450.-Ditto, for watchmakers, small and round head. " 1.00 2451.-Ditto, geological, one head flattened and the other pointed, for breaking ores. Each, $1.75 2452.-Ditto, ditto, extra large and heavy, for field work." 2.00 2453.-Ditto, ditto, and polished, for use with two hands (small sledge). Each, $2.50 2454.-Handles, of wood, for files, hammers, etc. ".06 to.50 2555.-Hand-bladder Glasses. Each,.75 to $1.00 Hardness of Minerals, tests for. See Minerals. 112 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE 2458 2456 2452 2455 2457 2459 Hessian Crucibles. See Crucibles. Heat Apparatus. See collection at the latter part of this book. Hoffmann's Ditto, collection of. See the list of the same at the back of this book. 2456. —Holders, for caustic, ivory, with silver ends. Each, $4.00 2457.-Ditto, for platinum spoons and wire. ".60 Ditto, for burettes, supports, test tubes, etc. See Supports, Test Tubes, etc. 2458. —Holsterique Barometer, with thermometer, accurately adjusted, fine polished brass mounting, in velvet-lined morocco case. Each, $35.00 Hot Water Funnel. See Funnels. 2459.-Hydroclese, or metallic syringe, French, in velvet-lined, mahogany cases. For males, $4.00 The chief merit of this clyso-pump is, that a piston is dispensed with, the liquid drawn acting in this capacity. Its construction is based on the simplest laws of Hydraulics, and is purely metallic. It can be employed advantageously for all kinds of injections, and, by increasing its volume, acts as a medicinal douche. 2460.-Ditto, ditto, ditto. For females, $5.00 Hydrogen Generator and Pistols. See Gas. Hydraulics and Hydrostatics. See collection at the close of this book. OF CHEMICAL AND PHYSICAL APPARATUS. 113 HYDROMETRY. 2461.-Hydrometers, for Acids and aceteous fermentations, Balling's. Each, $1.25 2462.-Ditto, Otto's, 0 to 12, in fourths. " 1.25 2463. —Ditto, for Acids, Beaume's, 0 to 70, in fourths, in pasteboard cases. Each,.75 2464. —Ditto, ditto, ditto, for liquids heavier than water, Beaume's scale, graduated about 70. in li i.75.80.85 each. 2465.-Ditto, for Alkali, or fluids lighter than water, Beaunme's scale. Each,.75 2466.-Ditto, for ditto, in pasteboard cases, in 1. ". 2467.-Ditto, ditto, ditto, in tin cases, No. 204. ".60 2468.-Ditto, ditto, ditto. ".50 2469.-Ditto, for Acid, in chamois-lined leather cases, with thermometer and glass jar complete. No. 995 996 997 $4.00 4.50 5.00 each. Ditto, for alcohol. See Alcoholometers. 2470.-Ditto, Manual containing tables for alcoholometers, Pyle's. Each,.50 2471.-Ditto, empty cases for Hydrometers. " 50 2472.-Ditto, for Bark, in pasteboard cases. " 1.00 2473.-Ditto, Beer and Wort, Balling's, in pasteboard cases." 1.00 2474.-Ditto, ditto, with thermometer, in " " " 2.00 2475.-Ditto, for Brine, pasteboard cases. " 1.00 2476.-Ditto, for Coal oil, 30 to 50. ".75 2477.-Ditto, up to 80. " 1.00 2478.-Ditto, Densi.meter. 1.00 2479. —Ditto, Ether, Beaume's scale.. 2480.-Ditto, ditto, pese, French, No. 2585. " 1.00 2481.-Ditto, for Fluids heavier than water, 0 to 70. Each,.75 2482. —Ditto, ditto ditto, with thermometer and specific gravity scale, 1000 to 2000. Each, 82.00 2483.-Ditto, for Fluids lighter than water, 10 to 40. 75 2484.-Ditto, ditto, ditto, with thermometer and specific gravity scale, 700 to 1000. Each, $1.50 114 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2485. —Hydrometers, for petroleum, etc. Each, $2.00 2486.-Ditto, for Milk, ordinary style. ".50 2487.-Ditto, ditto, 0 to 25. ".7 2488.-Ditto, Milk Essayers, Chevalier, jar and therm'r," 1.50 2489.-Ditto, ditto, Quevenne, with jar and thermom'r, " 1.00 2490.-Ditto, for Most and Wine, French, in tin cases. " 1.50 2491.-Ditto, ditto, Oechsle's. " 1.50 2492. —Ditto, for rich Oils, French, Lefebre, with thermometer in pasteboard cases. Each, $2.00 2493.-Ditto, ditto, ditto, 22 to 50. " 2.00 2494.-Ditto, for Salt. ".75 249. —Ditto, Saccharometers, French, for testing syrup, in pasteboard cases. Each,.75 2496.-Ditto, ditto, Beaume's, for Syrups and Sugar. ".75 2497.-Ditto, ditto, Balling's, for " " " $1.00 2498.-Ditto, ditto, with thermometer enclosed. " 2.00 2499.-Ditto, ditto, thermometer and Specific gravity scale extra. Each, $2.50 2500.-Ditto, ditto, for testing Sugar and Syrups, according to Dr. Scheibler. In chamois-lined morocco case, with three spindles, and cylinder. Each, $15.00 2501.-Ditto, ditto, for Shellac, one spindle, in pastebo'rd cases. 1.00 2502.-Ditto, ditto, Universal, for Specific Gravity, one spindle registering 700 to 2000, for fluids heavier or lighter than water, in pasteboard box. Each, $2.00 2503. —Ditto, ditto, two spindles, 700 to 1000 and 1000 to 2000, in pasteboard boxes. Per set, $3.00 2504.-Ditto, ditto, single spindles, in pasteboard boxes. 700 to' 850 1000 to 1200 1400 to 1600 700 to 1000 1000 to 1400 1400 to 2000 750 to 1000 1000 to 2000 1800 to 2000 85a to 1000 1200 to 1400 Each, $1.50 2505.-Ditto, ditto, sets, Specific gravity, from 700 to 2000, finely and accurately divided, in light glass jars, swelled top, with wooden feet. Per set, $3.50 2506.-Jars alone, for the above. Each,.50 2507. —Ditto, for Specific Gravity, single spindle, 1000 to 2000, with thermometer and fine glass jar, in chamois-lined leather cases. Each, $5.00 OF CHEMICAL AND PHYSICAL APPARATUS. 115 ~ —' 11I1R[ - 2511 2524 2525 2508. —Hydrometers, for Specific Gravity, two spindles. Each, $6.50 2509.-Ditto, ditto, ditto, in fine chamois-lined mahogany cases. with thermometer and glass cylinder. Each, $9.75 2510.-Ditto, ditto, three spindles. " 11.50 2511.-Ditto, ditto, six " " 14.00 2512.-Ditto, ditto, seven " " 16.00 2513.-Ditto, Twaddle's, in sets of six spindles. No. 1, 0 deg. to 24 deg., specific gravity, 1000 to 1120 No. 2, 24 " to 48 " " " 1120 to 1240 No. 3, 48 " to 75 " " " 1240 to 1370 No. 4, 74 " to 102 " " " 1370 to 1510 No. 5, 102 " to 138 " " " 1510 to 1690 No. 6, 138 " to 180 " " " 1690 to 2000 The entire set of six, with spherical bulb. Each, $6.00 2514.-Ditto, sets of six, with cylindrical bulb. " 5.00 2515.-Ditto, single spindles. " 1.25 2516.-Ditto, sets of five spindles, in black walnut box. " 5.50 2517.-Ditto, for Urine, French. Each,.50 2518.-Ditto, ditto, with one spindle, of fine graduation, indicating from 1000 to 1040, with solution tube. Each, $2.00 2519.-Ditto, Solution tubes, extra. ".25 2520.-Ditto, for Vinegar. c".75 2521. —Ditto, Jars, with brass foot. Each, $1.50 Ditto, Jars, with glass foot. See Jars. 2522. —Hydrometers, Nicolson's, of japanned tin, for ascertaining the specific gravity of minerals, etc. Each, $2.00 2523.-Ditto, ditto, with a set of decimal weights. " 4.00 2524. —Ditto, ditto, brass, finely adjusted with a set of weights, all in case, without jar, complete. Each, $6.00 116 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Hydrogen Lamps. See Doebereiner's Lamp. 2525. —Hygrometers, Daniels' on polished stand and gilt marks, Each, $9.00 2526.-Ditto, Mason's, on boxwood stand. " 4.50 2527.-Ditto, Saussure's, hair, mahogany stand. " 4.00 2528. —Ditto, ditto, on brass stand. $8.00 to 12.00 2529.-Ditto, August Psychrometer, two thermometers, wet and dry bulb, and fine divisions. Each, $12.00 2530 2534 2539 2530.-Ice Freezer, Carr6's apparatus, importec only to order. $150.00 It consists of a generator and receiver, made of iron boiler-plate, the receiver being conical in shape, both connected by means of a strong iron tube. In the generator is placed a strong solution of ammonia saturated at 00, and this is heated over a large gas flame, the receiver meanwhile being immersed in the water. The liquified ammonia passes again into the gaseous state, and is re-absorbed by the water in the generator. But in this evaporation, great cold is produced, and the vessel of water is soon frozen. The ammonia going over can be used indefinitely. 2531.-Ditto, Hoffman's apparatus, in glass, showing the principle of Carr6's ice freezer. $15.00 2532. —Ivory Scale, Harcourt's, for measuring the button in assay, very accurate, made speciallv to order for me. $5.00 2533.-Ignition Tubes. Per doz. $2.50 2534.-Indicator of Fire Damp, Electric. 7.50 The large cup is filled with porous plaster of Paris, and is connected with the bulb-tube opposite to it (which contains a small quantity of mercury), by means of a brass tube. The uop of the bulb has a screw cap to hold one of the electrodes. The other electrode is screwed to the base, and connects with large cup; when the porous cup absorbs the fire-damp gas, the mercury presses on the narrow tube, making connection with upper cup, completing the circuit, and ringing the bell. OF CHEMICAL AND PHYSICAL APPARATUS. 117 Infusion Jars. See Jars. Ingot Moulds. See Moulds. 2535.-Iron Ladle, used in assay, 3 in..40 2536. —Jars, Battery, glass, cylindrical shape and flat bottom. 4x4 4x5 4~x5j 4x6 4~x6 5~x8 ill..40.45.50.55.60.75 each. 7x8 6x9 8x12 9x12~ 9x15 in..80.85 $2.00 2.50 3.00 each. 2537. —Ditto, ditto, fluted, for bichromate potash solution. Pints,.25 quarts,.50 each. 2538.-Ditto, cold cream, French, smooth, rounding and highly glazed inside. I 1 2 oz..75.85 $1.00 dozen. Ditto, chloride of calcium. See Chloride of Calcium. 2540 2542 2543 2544 2550 2539.-Ditto, conserve, with cut-glass covers, and two rings, made of the finest French Baccharat cut crystal. It is the finest quality of glassware in the world, bought by me directly from the factory, and suitable for showing specimens, etc., in show-windows, counters, etc. Height under the cover, 14 16 18~ in. $7.50 10.00 15.00 each. 2540.-Ditto, ordinary, French, pure white crystal; sides perfectly parallel; single and double rings. Measure under cover, 27 c. c. 32 to 33 c. c. $2.00 3.50 each. Ditto, Decanting. See Decanting 2541. —Ditto, hydrometer, French, swelled top, polished box-wood feet. Each,.50 2542.-Ditto, ditto, heavy swelled top, with glass feet. Height, 16 18 24 in..75 $1.00 1.24 each. 118 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2543.-Ditto, ditto, with glass foot and ring around the neck, ground top to receive glass plate. 5xl- 6x1l 8x1 10x2 10 x12 10xl} in..30.35.40.45.50.55 each. 122x14 13x2 15x2 18x2+ 2Ox2~ 25x3 in..60.65.70.75.80 $2.00 each. 2544.-Ditto. ditto, lipped. 5x4 6x1l 7~ x11 8x1~ 10x2 11~x2~ in..30.35.37.40.45.50 each. 13x2.15x 15x2 20Jxl 25x3 in..52.50.55.75 $2.00 each. Intermediate sizes of the above jars will be in proportion. 2545.-Ditto, Infusion. Pints, $1.50 quarts, 2.00 each. 2546.-Ditto, Leech. Quarts,.50 galls., $2.50 each. 2547.-Ditto, Leyden. j pt. 1 qt. ~ gall. 1 gall. 2 galls. $1.25 1.50 2.50 3.25 4.00 each. 2548.-Ditto, Mercury, glass. Each, $1.00 to 1.50 2549.-Ditto, ditto, or Powder, cylindrical, of porcelain, about 4 inches high and 2~ inches diameter, with small opening at the top. Each, $1.75 2550.-Ditto, specie, ground tops, if desired. E pt. 1 pt. lqt. ~ gall. 1 gall. 2 gall..15.18.25.35.50 $1.00 each. 2551.-Ditto, ditto, fluted sides. Pints,.30 quarts,.50 2552.-Ditto, ointment, glass, flat shape, swelled tops. 1 oz., 81.50 2 oz., 2.00 per doz. 2553. —Ditto, ditto, porcelain, glazed, flat covers. 8 oz. 16 oz. I qt..60.75 $1.25 each. 2554 2554.-Ditto, ditto, fine French choice porcelain, with fire-gilt bands. I oz., $3.50 4 oz., 4.00 per doz. 2555.-Ditto, ditto, white porcelain, conical cover, knobbed. 8 16 32 oz..75 $1.00 1.25 each. 2556.-Ditto, ditto, French, labelled, 17 c. c. high. Each, $1.30 OF CHEMICAL AND PHYSICAL APPARATUS. 119 Q 11 ltUlll'l TS I/ III 2557 2561 2563 2564 2565, 66 2557. —Jars, ditto, round, with conical top, knobbed, tall shape, of the very best translucent and highly glazed china porcelain, with fire-gilt decorations, and labelled. 42x28 4Jx34 7~ x4 8x4 6x3WI 61x41 in. $1.50 1.75 2.25 2.50 2.75 2. 8 64x41 7x4~ 7~x4j 8x4J 9x'5 in. $3.00 3.00 3.15 3.25 3.50 each. The above measurements a e made under the cover, and are approximate, the actual measure being in millimeters, do not precisely correspond with English measures. These jars are well known to be about the only kind through which ointments will not penetrate. 2558.-Ditto, ditto, ditto, octagonal shape, 4~x8. Each, $2.50 2559.-Ditto, ditto, octagonal and oblong, 4~x6x78. " 1.50 2560.-Ditto, Preparation, employed for the collection of anatomical preparations,of fine white and clear glass, having the stoppers thoroughly ground in with fine emery, and provided with glass hook from which to suspend the objects to be preserved. 8 oz. pts. qts. I gall. 1 2.70.75 $1.25 1.75 3.00 6.00 each. 2561. —Ditto, ditto, of Bohemian glass, havingf the mouth parallel with the sides. 2x4 2~x5 3~x6 4x7 6x13 10x8 in..50.75 $1.15 1.75 6.00 15.00 each. 2562.-Ditto, ditto, with stopper ground into the base of the jar, the top being oval; used for laying down preparations or exhibiting specimens. 4 8 16 32 oz..30.50.75 $1.00 each. 2563.-Jets, brass, for hydrogen. Each,.40 2564.-Ditto, ditto, with stopcock and cap. " $2.00 2565.-Ditto, for washing bottles, ordinary glass, bent. ".06 120 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2566.-Jets, for Faraday's washing bottles, drawn. Each,.10 2567.-Ditto, for Berzelius's washing bottles. ".25 2568.-Ditto, for Bunsen's burners, flattened ends. ".25 2508 2569 2570 2573 2581 2569.-Ditto, Blast, to place in a Bunsen burner, having an extra tube to connect with blow-table and produce blast. Each, $1.00 2570.-Jewelers' Globes. " 1.50 2571.-Julep Tubes, straight or bent. Per doz., 2.50 2572.-Kettles, porcelain, small. Each, 3.50 2573.-Ditto, ditto, large. " 8.50 2574.-Knife, for cutting cork, wooden handle..40 2575.-Ditto, for blow-pipe use, with file on back..75 2576. —Ditto, for cutting around glass tubing..50 2577.-Ditto, sharpeners, of porcelain. 5 in..40 6~ in..50 each. Kipp's Apparatus for sulphuretted hydrogen. See Gas. g578.- Labels, Chemical, with the old and new nomenclature, and old and new symbols on the same paper. Per set,.20 2579.-Ditto, Mawson's, in book form, with gum backs, double nomenclature. Per book,.50 2580. —Ditto, blank. Per doz. sheets,.36 Lactometers, milk. See Milk Assayers. 2581.-Lactosc ope, Vogel's, or optical milk test, in wooden case. $12.00 The above illustration consists of a vessel in a semi-circular brass frame and parallel glass sides, one-fifth of an inch apart. When this vessel is filled with a mixture of new milk and water, the appearance of the mixture is exs amined by placing a candle at a distance of three feet from one side of it, an(l the eye close to the other side; the presence of a certain proportion of cream renders the figure of the candle flame indistinct. The smaller the quantity of milk required to obviate the candle light the better is the quality of the milk. With the above comes a glass graduated vol cylinder on foot, with spout, and a graduated vol pipette. The manner of operating with this, showing the precise quantity of butter indicated in the milk, will be furnished with the instrument. OF CHEMICAL AND PHYSICAL APPARATUS. 121 2591 2582 2583 2586 2590 2593 2582. —Ladles, iron, for pouring metals. 3-inch bowl,.40 5-inch,.50 each. 2583. —Ditto, tinned, long handles. 5 5j 6 in..60.70.80 each. 2584. —Ditto, porcelain, long handles. Each,.50 2585. —Lamps, for perfuming rooms, without flame. " $1.25 Ditto. See Davy's Safety. 2586. —Ditto, alcohol blast, Russian. 1.50 2587. —Ditto, brass blast, consisting of a large brass reservoir on stand, with jet bearing on a lamp underneath. Each, $7.50 2588.-Ditto, alcohol, of brass, mounted on three legs, with sheet iron jacket, containing a triangle to hold a crucible immediately over the flame jet; the jacket increases the heat. Each, $12.00 2589.-Ditto, ditto, Lang's, on tripod, with porcelain handle and support for crucibles, or perforated sheet iron shelf, on top. Each, $3.00 1'22 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 599 2603 2605 2607 2590.-Lamps, Berzelius, of brass, on tripod, with triangle perforated shelf, and porcelain handles. Each, $4.50 2591.-Ditto, ditto, of the very best manufacture, of heavy brass, and highly-polished mahogany and cocoa handles. Each, $7.50 2592.-Ditto, ditto, of brass, with reservoir about 10 inches distant from the burner, with a stopcock half way on connecting tube to regulate the flow of the spirits. Each. $6.50 2593.-Ditto, ditto, or Rose's form, on brass stand, wit h mahogany foot, with rings, triangles, etc. Each $6.00 2594.-Ditto, ditto, ditto, with porcelain foot. " 7.00 2595.-Ditto, ditto, Mfller's modification, mahogany base, having rotary motion around the stand. Each. $7.00 2596.-Ditto, ditto, or Spirit lamps, of brass. Small, $1.00 large, 1.50 2597.-Ditto, ditto, of glass, German, 4 oz., without caps. Each, 20 2598.-Ditto, ditto, with round caps. 4 oz.,.50 6 oz., 60 each. 2599.-Ditto, ditto, with large cap and square base. 3 5 8 oz..50.75 $1.00 each. 2600. —Ditto, ditto, vase form, 3 oz. Each,.50 2601.-Ditto, brass, for blow-pipe, with screw cap, for putting ov2r Each, $1.00 OF CHEMICAL AND PHYSICAL APPARATUS. 123 2602.-Lamps, brass, long stem, for heating tubes and soldering. Each, $1.25 2603.-Ditto, engravers, the top is to be filled with water to concentrate the light. Each, $4.00 Ditto, hydrogen. See Doebereiner's Lamps. 2604.-Ditto, Plattner's blow-pipe, brass, extra heavy, mounted on stand. Each, $3.00 Lamps, gas. See Burners. Lamp Stands. See Supports. 2605.-Lamps, Labratory, large wooden foot, with clamp, reflectors, etc. Each, $20.00 2606.-Ditto, Students. Each, $2.50 to 4.00 Ditto, electric. See Electric Lamps. 2607.-Ditto, Magnesium, with fan wheel and clock-work, for burning magnesium ribbon or wire. Each, $25.00 2608 2610 2608.-Ditto, oxhydric, of brass, mounted, on stand. Each, $7.50 2612 2609.-Ditto, ditto, ditto, larger. " 16.00 2610.-Ditto, ditto, larger, with extra arrangement for lime holder, moveable joints, etc. Each, $20.00 2611.-Ditto, ditto, ditto, very accurately adjusted, silver plated. Each, $22.50 2612.-Ditto, ditto, on stand, French, Duboscq's pattern." 25.00 2613.-Ditto, ditto, on iron stand. " 20.00 Ditto, cylinders. See Burner Furnaces. 124 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2622 2623 2613 2621 2628 2614. —Lamp Wicks, for Berzelius's, Rose's, Miller's, etc. Per doz.,.25 2615.-Ditto, for Plattner's blow-pipe lamp. Per yard,.25 2616.-Lead Trays, for etching, on glass, with hydrofluoric acid. Each,.40 Lead Retorts, for making hydrofluoric acid. See Retorts. 2617. —Leaf, Dutch. Per book,.25 2618.-Ditto, Gold. " $1.00 2619.-Ditto, Silver..75 2620.-Leech Tubes. Per doz., 1.00 2621.-Lenses, magnifying, for assayers' use, or reading fine print, etc. Each, $2.50 2622.-Ditto, Coddington, brass. Small, $2.25 large, 2.50 each. 2623.-Ditto, Stanhope, German silver, for examination of minerals. Small, $2.00 large, 2.50 each. 2624.-Ditto, ditto, silver. Small, $2.50 large, 3.50 each. 2625.-Ditto, ditto, silver, with cap, to keep the dust from them, small. Each, $3.50 2626. —Ditto, horn cases, single 9 lines,.75 11 lines, $1.00 each. 2627.-Ditto, ditto, double glasses. 9 lines, $1.25 12 lines, 1.50 each. OF CHEMICAL AND PHYSICAL APPARATUS. 125 2632 2633 2635 2636 2628.-Lenses, horn cases, triple glasses 9 lines, $1.50 11 lines, 1.75 each. 2629.-Ditto, Photographic, Steinheil, of Munich, a very correct and clear glass. $30.00 2630. —Ditto, watchmakers. 2.50 2631.-Ditto, a set of convex and concave, in a box. 2.50 Liebig's Potash Bulbs. See Potash Bulbs. 2632.-Light, Refraction of, apparatus for. 5.00 2633.-Light Recomposition, revolving disc, with prismatic colors, arranged consecutively. $2.50 2634.-Litmus Papers, blue, red or neutral, for test papers. Per sheet,.05 See also Tumeric Paper. 263a. —Litre Bottles, stoppered and accurately guaged. 50 cc. 100 150 250 300 ~ litre 1 2.35.45.50.75.85 $1.00 1.10 1.50 each. 2636.-Litre Flasks. 30 cc. 50 100 200 i litre i 1.25.30.40.60.65.85 $1.00 each. 2637.-Ditto, ditto, two marks on the neck. 50 to 55 100 to 1.10 200 to 220 cc..60.75 $1.25 each. 2638. —Limb, Safety, Liebig's. Each,.50 2639. —Magic Lanterns, French, square tin. Small medium large $6.00 10.00 15.00 each. 2640.-Ditto, ditto, black, oval shape, provided with a ratchet screw and pinion for drawing in and out the lenses. Ea. $25.00 Magic Circles. See Electricity. 126 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE 6241 2640 2647 2630 2641.-Magneto-Electric Apparatus, new invention, for firing the fuses, etc., in mine blasting. $100.00oo In this apparatus the armature A A is always in contact with the poles of the magnet N, 0, S. It is supported by a piece of metal, B, which turns around a horizontal axis, a; this piece presents a kind of handle, B a, having a knob at B, upon which one strikes with the finger in order to produce the withdrawing of the armature; thus, at the moment cf this withdrawal, a first induction current is produced, passing contemporaneously with the movement which causes it, through the wire surrounding the extremities of the magnet. As long as one keeps the armature withdrawn from the magnet, the apparatus is inert; but as soon as one ceases to bear down on the button B, the armature, impelled by a spring which acts on the lever a B, drawn besides by the magnet, it turns instantly to the contact of the poles NS; a second current is produced in a contrary direction to the first, of equal intensity, as can be easily demonstrated with the galvanometer. There is also connected with the instrument a stop X, the employment of which holds the armature in a fixed position, so that it is impossible for electricity to pass. This instrulment works in all weathers; and, while it is impossible to fire the fuse when the stop X is placed upon the armature, a simple withdrawal of the stop X, and a smart rap of the finger upon the handle B, will instantly fire a fuse by the electric current through a wire 500 to 600 yards in length. 2642.-Magneto-Electric Machine, in black walnut box, with battery, complete. $10.00oo OF CHEMICAL AND PHYSICAL APPARATUS. 127 2643.-Magneto-Electric Machine, fine polished mahogany box, with Universal lock. $35.00 2644.-Magnesium, ribbon and wire. Per foot,.06 2645.-Ditto, ditto, ditto. Per ounce, $3.25 2646.-Magnets, steel, straight. Each, 1.00 2647.-Ditto, Horseshoe, best English quality. 21 3 31 4 5 6 10 in..25.30.60.75.90 $1.25 2.50 each. 2648.-Ditto, Horseshoe, compound. Each, $4.00 2649. —Ditto, pair of bar, in box. " 3.50 2650. —Magnetic Needle, on stand. 1.75 2651. —Ditto Dipping Needle, with brass stand, simple form. 2.00 2652.-Ditto, ditto, more elaborate. 8.00 2653. —Ditto, Toys, in boxes..50 to 1.50 Marchand's Drying Tube. See Chloride of Calcium Tube. 2654. — Mariotte's Law, apparatus for. $10.00 Marsh's Arsenic Test. See Arsenic. 2655. —Mattrasses, Bohemian, round bottom, long neck. 4 8 16 24 32 oz.20.30.35.40.45 each. See also Bolt Heads. 2656. —Measures, gutta percha, tall. 1 quart, $3.00 i- gallon, 3.50 each. 2659 2657. —Ditto, conical, quart. Each, $3.00 2658.-Ditto, Harcourt's, for assayers, ivory, very accurate." 5.00 2659.-Ditto, lead, for blow-pipe apparatus. ".50 2660.-Ditto, porcelain, with handle and lip. 2 4 8 16 oz..35.55.75 $1.00 each. Mechanical Powers. See Apparatus, Mechanics. 2661.-Mercury Box, earthen, oblong, glazed, 2x5..75 2662.-Ditto, Bottles, or Flasks of iron. Each, $1.50 2663.-Ditto, Jar, or Powder Cup, porcelain, 5 lbs. 1.50 2664.-Ditto, ditto, glass. 16 18 24 in. $1.00 1.50 2.00 each. 2665. —Mercurial Receiver, Cooper's, plain, small..50 2666.-Ditto, ditto, larger. $1.00 2667. — Ditto, ditto, stoppered at the topx 1.50 128 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2668.-Mercurial Receiver, graduated, plain. $1.25 to 1.50 2669.-Mercury Shower, through porous wood. 3.00 2670. —Ditto, Trough, porcelain, to hold 5 lbs. 1.00 2671.-Ditto, ditto, to hold 16 lbs. 2.00 2672. —Metre Measures, graduated to millimeters on one side, English inches on the other side, graduated by government standard, folding together in short lengths for the pocket, of box-wood. Each,.50 2673.-Ditto, ditto, ditto, of ivory. " $2.25 2674.-Ditto, ditto, fine ivory ruler, or paper cutter, for the desk, with a knob in the center. Each, $7.50 2675. —Ditto, ditto, ivory, small, graduated 10 to 12 centimeters. 2676.-Microscopes, No. 1, Universal joint, on flat standard, small. Each, $7.50 2677.-Ditto, ditto, No. 3. " 10.00 2678.-Ditto, ditto, No. 4. " 15.00 2679.-Ditto, No. 1, supported on two columns, with thumb screw, allowing the tube to rest in an upright or vertical position, having two objectives and a jointed light reflector. Ea. $25.00,2680.-Ditto, ditto, by Natchet, compound. " 20.00 2668 2681 2681.-Ditto, large, Gundlach's, English stand, thumb screw delicately adjusted, in fine polished mahogany case, lock and key, with strap for carrying, two eye pieces, five objectives, including one of his fine immersion lenses of very high power, slides, chamois skin, etc. $225.00 The high reputation of this celebrated manufacturer is too well known to need any further description of the foregoing instrument; it is precisely the same make and character in every particular as the one I exhibited at the meeting of the American Association for the Advancement of Science, held at Troy, which was so favorably spoken of in the notice of their proceedings. OF CHEMICAL AND PHYSICAL APPARATUS. 129 2~88 2671 2690 2692 2680 2693 2682.-Microscope, solar, complete, with all the appurtenances, in fine polished box, comprising colored glasses, mounted; several objectives, manufactured expressly for me by the manufacturer for the University of Vienna. $200.00 Ditto, pocket. See Loups or Lenses. Ditto, aplanatic, Steinheil. See Photographic Lenses. 2683.-Microscopic Covers, circles. Per doz.,.35 2684. —Ditto, ditto, ditto. Per ounce, ~$4.00 2685.-Ditto, ditto, square. Per doz.,.30 2686.-Ditto, ditto, ditto. Per ounce, 3.00 2687.-Ditto, Slides. Per doz.,.70 Minerals. See full list and description at the latter part of this book. 2688.-Mineralogists' Slates, of unglazed porcelain, for showing the streak. 2x2~,.40 4xS5,.50 each. Mineralogical Hammers. See Hammers. Minim Glasses. See Graduates. 2689.-Miser's Plate. $2.50 2690.-Mixing Capsules, of brass, for blow-piping and assay, according to size..50 to $1.00 Larger sizes made to order. 2691.-Ditto, ditto, horn. Each,.25 2692.-Ditto, Bottles, ground stoppered, carefully ground and graduated. 500 c. c., $2.50 1000 c. c., $3.50 2693.-Ditto, Jars, carefully ground and stoppered. 500 c. c., $2.50 1000 c. c., $4.50 130 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE ~'694.-Models, of Crown Diamonds, imported to order, comprising four of the largest crown diamonds. Each, $20.00 Ditto, of Precious Stones, Crystals, etc. See Collections. Models of Mining Machinery, Tools, Furnaces, etc., as employed in the School of Mines at Freiburg, Saxony; duty free; imported only to order, viz: 2695.-Model, of Arch Protector. $6.00 2696.-Ditto, amalgamating apparatus. 40.00 to 45.00 2697.-Ditto, of apparatus, for the Ascent and Descent of men in a mine. 18.00 to 25.00 2698.-Ditto, of deep Shaft Bucket-lift, with bucket. 7.50 2699.-Ditto, of shallow Shaft and Bucket-lift, with bucket. 7.50 2700.-Ditto, of iron Bucket-lift, with bucket. 18.00 2701.-Ditto, of Buddle, for stamp ore.. 9.00 2702.-Ditto, Horse Capstan. 60.00 2703.-Ditto, Miners' Cage. 3.00 2704.-Ditto, Mulderhutte Cinder hoister. 37.50 2705.-Ditto, Hydraulic Composing-machine. 30.00 2706.-Ditto, usual form Composing-machine. 12.00 2707.-Ditto, of Constructing Tools, various. 150.00 to 210.00 9708.-Ditto, Patterson's Concentration Apparatus. 60.00 2709. —Ditto, " Crab," for hauling and heaving vessels into dock. $12.00 2710. —Ditto, of ore. 2711.-Ditto, of ore Crushing Machine, with lifter. 350.00 2712. —Ditto, ditto, without lifter. 225.00 2713. —Ditto, of round Buddle, for dressing stamped ore. 45.00 to 52.50 2714. —Ditto, of Buddle stationary frame. 45.00 to 52.50 2715.-Ditto, of cylindrical blast Bellows, in wood. 87.50 2716.-Ditto, ditto, ditto, in metal. 225.00 to 315.00 2717.-Ditto, of Driving Ton, for flat shaft. 2.50 2718.-Ditto, of Delivery shaft. 2.50 2719.-Ditto, of separating Drum for well hole. 15.00 2720. —Ditto, of Drill, with drilling apparatus. 75.00 to 90.00 2721.-Ditto, of steam Engine, with horizontal cylinder and paddle-wheel movement, in wood. $45.00 to 60.00 2722.-Ditto, ditto, ditto, in metal. 225.00 to 300.00 2723.-Ditto, steam Engine, with working beam, in wood. $120.00 to 150.00 OF CHEMICAL AND PHYSICAL APPARATUS. 131 2724.-Model, steam Engine, in metal. $270.00 to 375.00 2725. —Ditto, of steam Engine, with air-condensing cylinder, in wood. $135.00 to 165.00 2726.-Ditto, ditto, ditto, in metal. 250'00 to 350.00 2727.-Ditto, oscillating steam Engine, in wood. $150.00 to 200.00 2728. —Ditto, ditto, ditto, in metal. $300.00 to 450.00 2729.-Ditto, water-pressure Engine, complete. $150.00 to 450.00 2730.-Ditto, Extraction apparatus,, $30.00 2731.-Ditto, of refining Forge, German. 2726 $15.00 2732. —Ditto, Hartz linen-covered Frame, for dressing slime. $18.00 2733.-Ditto, annealing Furnace, or oven. 25.00 2734.-Ditto, assay Furnace. 12.00 2735.-Ditto, blast Furnace, for iron. 37.50 2736.-Ditto, cupola Furnace, with ventilator. 37.50 2737.-Ditto, ditto, ditto, without ventilator. 24.00 2738.-Ditto, Freiburg Furnace, with double draft. 21.00 2739.-Ditto, ditto, lead Furnace. 18.00 2740.-Ditto, Hartz lead Furnace. 27.00 2741. —Ditto, puddling Furnace. 24.00 2742.-Ditto, iron refining reverberatory Furnace. 60.00 2743.-Ditto, reverberatory smelting Furnace. 22.50 2744.-Ditto, English reverberatory smelting Furnace. 60.00 2745.-Ditto, Mansfield roasting Furnace, with double draft. 22.50 2746.-Ditto, of reverberatory Furnace, for the concentration of copper ore. $55.00 2747.-Ditto, of Hungarian reverberatory roasting Furnace. 33.00 2748. —Ditto, English roasting Furnace, with four work openings. $35.00 2749.-Ditto, muffle roasting Furnace. 33.00 2750. —Ditto, Furnace, for silver refining. 27.00 2751.-Ditto, Mansfield "Spectacle" Furnace. 12.00 2752.-Ditto, Saxony Furnace, for tin ore. 10.00 2753. —Ditto, Furnace, for zinc ore. 45.00 132 E. B. BENJAMIN'S DESCRIPTIVE CATALOQUE 27-4. —Mod,; curved Furnace, or oven. 12.00 2755.-Ditto, of Gold washing machine. 30.00 2756.-Ditto, of lift Hammer, in wood. 24.00 2757.-Ditto, ditto, ditto, in metal. 45.00 2758.-Ditto, steam Hammer, in wood. 37.50 2759.-Ditto, ditto, ditto, in metal. 67.50 2760.-Ditto, forge IIammer, of wood. 24.00 2761.-Ditto, ditto, ditto, of metal. 40.00 2762.-Ditto, tilt Hammer. 24.00 2763.-Ditto, of Hearth of a foot wall. 9.00 2764. —Ditto, Freiburg refining Hearth. 50.00 2765. —Ditto, English refining Hearth. 30.00 2766.-Ditto, of inclined Plane, with drawing weights. 36.00 2:67.-Ditto, of Cross Lever, in wood. 7.00 2768.-Ditto, ditto, ditto, in iron. $12.00 to 18.00 2769.-Dltto, of Machine, for ore washing. 15.00 2770.-Ditto, ore Mill, with water wheel. 125.00 2771.-Ditto, ore Mill, without " 100.00 2772.-Ditto, stamp Mill, for two wet and one dry charge, with wheel. 75.00 2773.-Ditto, ditto, ditto, ditto, without wheel. 45.00 2774.-Ditto, of rolling Mill, for bar iron, in wood. 57.00 2775. —Ditto, ditto, ditto, in metal. 275.00 2776.-Ditto, warm air Oven. 15.00 2777.-Ditto, hand Pump. 7.50 2778.-Ditto, Rail "Dog," with truck, English. 15.00 2779.-Ditto, ditto, ditto, without truck, Hungarian 7.50 2780.-Ditto, plain Reel. 6.00 2781.-Ditto, of sinking Shaft, of iron. 37.50 2782. —Ditto, ditto, ditto, of wood. 22.50 2783.-Ditto, ditto, ditto, with round wall. 30.00 2784.-Ditto, upright Shaft and under-ground workings. 225.00 2785.-Ditto, Shaft timbering, for hoisting windlass. 12.00 2786.-Ditto, Screening, or Sifting Machine. 40.00 2787.-Ditto, Sweep Table. 18.00 2788.-Ditto, of "Dolly Tub." -2.50 2789. —Ditto, Trunks, for the precipitation of the slimes in stamping mill. $40.00 to 45.00 2790.-Ditto, Ventilator, as used in the Hartz mines. 22.50 OF CHEMICAL AND PHYSICAL APPARATUS. 133 2791.-Model, Ventilator, according to Fabry's method. 75.00 2792.-Ditto, ditto, ditto, Karsten's method. 37.50 2793.-Ditto, under-ground working of mines, with ridging und stoping; also chambering and mason-work up to the deposit bed. $45.00 to 60.00 2794.-Ditto, Wheel-barrow. 3.00 2795. —Ditto, of tread Wheel. 15.00 2796.-Ditto, hand Windlass. 22.00 2797.-Ditto, turning Wheel;l" 40.00 2798.-Ditto, Water-wheel, Forneron's method. $60.00 to 75.00 2799.-Ditto, ditto, Chouvel's. 60.00 to 75.00 2800. —Ditto, ditto, Schwamkrug's, with vertical motion. 75.00 2801.-Ditto, ditto, overshot. 30.00 2802.-Ditto, ditto, undershot. 22.50 2803.-Ditto, ditto, breast. 30.00 2804.-Ditto, ditto, for back water. 30.00 2805.-Ditto, ditto, for drawing engine according to Schwamkrug's method. $270.00 2806.-Ditto, Water-wheel tools, as used by Schwamkrug. 235.00 2807. —Ditto, of the two above-mentioned, in one collection. 425.00 2808.-Ditto, Water-whim, with crate of iron. $150.00 to 22a.00 2809. —Various models of shaft, pit, and underground timbering and mason-work, for mines. $5.00 to 10.00 Other models can be made by the same manufacturers, in metal or in wood, accompanied with full drawings and descriptions. 2810.-Monochromatic Light Apparatus, for showing Sodium Flames, complete, with lamp, after Dr. Morton. $12.00 2811.-Mulders' Absorption Meter, for determination of carbonic acid from all bases, according to Fresenius. $5.00 Mohr's Apparatus, various, distributed under different headings throughout the Catalogue. 2810 2812.-Mordaunt Cloth, for dyers' test. Per yd., $2.00 2813. —Mouth Pieces, of horn, for blow-pipes, trumpet shape; also cylindrical and trumpet combined. Each,.25 134 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2811 2814.-Mouth Pieces, cylindrical, of ivory. Each,.50 2815.-Ditto, ditto, of turned wood, for inhaling gases, or to attach to gas bladders. Each,.25 2816.-Ditto, ditto, of bone, for inhaling bags. Each,'25 to $1.00 2818 2820 2821 2817 %822 2823 2827 2817.-Ditto, ditto, box-wood, for nursing bottles..25 2818.-Mortars, agate, with pestles. 1~ 14 it 1 1 i 2 2 in. $1.90 2.00 2.15 2.20 2.25 3.00 3.25 each. 21 21 2j 24 24 4 24 3 in. $3.75 4.00 4.50 5.00 5.50 6.00 7.00 " 3~ 3~ 4 4{ 5 5~ 5~ in. $8.50 9.00 15.00 17.00 20.00 z5.00 30.00" 2819.-Ditto, ditto, mounted in wood. Extra. Each, $1.00 Ditto, diamond. See Diamond Mortars. OF CHEMICAL AND PHYSICAL APPARATUS. 135 2820. —Mortars, glass, with lip and pestle, shape conical. Nos. 1176 1175 1174 1173 1172 Size, 3~ 31 4- 41 4- in. Price,.75 $1.00 1.25 1.50 1.75 each. 2821.-Dltto, hemispherical, glass, with pestle. 2 3 5 6 in..30.35 A.65 $1.00 each. -2822.-Ditto, iron, bell shape. 4 oz. 8 16 32 ~ gall. 1 2.40.70 $1.00 1.25 2.00 3.50 4.75 each. Ditto, iron. Other styles, special prices. 2823.-Ditto, porcelain, emulsion, with pestle and strainer. Each, $2.00 2824.-Ditto, ditto, with knobbed handles on either side, containing ~ galion. Each, $5.00 2825.-Ditto, ditto, ditto, ditto, 1 gallon. " 8.00 2826.-Ditto, ditto, ditto, ditto, 1 " emulsion, sharp lipped, and ring around the top, cover and porcelain handles. Each. $6.50 2829 2830 283a 2834 2835 2836 2827. —Ditto, ditto, deep mixing, glazed outside. Nos. 0 1 2 3 4 5 6 7 8 Diam., 3 3~ 41 51 6 7 8 91 in. Price,.45.60.75 $1.00 1.25 1.50 2.00 3.00 4.50 each. 2828.-Ditto, ditto, ditto, glazed throughout. Nos. 0 1 4 6.55.70 $1.25 2.50 each. 2829.-Ditto, ditto, shallow, for powders, glazed on the outside, with or without lip. Nos. 00 0 1 2 3 4 5 6 Size, 21 2} 3 3 44 5 5- 61 in. Price,.35.40.50.60.70.75.80 $1.00 each. Nos. 7 8 9 10 11 14 16 Size, 7 7t 84 9 9~ 12- 144 in. Price, $1.25 1.40 1.65 1.85 2.00 5.50 18.00 each. 136 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2830. —Mortars, wedgewood. Nos. 0000 000 00 0 1 2 3 4 Price,.40.50.55.65.70.90 $1.10 1.40 each. Nos. 5 6 7 8 9 10 11 12 Price, $1.70 2.00 2.50 3.50 4.00 4.50 5.25 6.00 " 2831.-Ditto, steel polished inside and out. 3 inches, $2.00 6 inches, 5.00 each. 2832. —Moulds, of boxwood, for rolling the paper for cartridge cases in blow-piping. Each,.20 2833.-Ditto, ditto, with pestle, for forming clay basins in blowpiping. Each,.75 2834.-Ditto, brass, for making charcoal crucibles in quantitative blow-pipe analysis, in four pieces. Each, $4.25 2835.-Ditto, ditto, for making cupels. Each, $2.50 to 4.50 2836. —Ditto, ditto, for making scorifiers. " 5.00 to 7.00 2837.-Ditto, charcoal of wood, for forming oblong charcoal pieces. Each, $1.25 2838 2842 2845 2847 2848 2838.-Ditto, iron, for making gold and silver ingots. Each, $1.50 to 2.50 2839.-Ditto, steel, for cupelling before the blow-pipe, two sizes and two pestles, with support. Each, $2.75 2840.-Ditto, suppository. " 7.50 2841. — uffles, sand, large. " 1.50 2842.-Ditto, ditto, ditto, for Hibb's furnaces, fire clay. " 1.25 2843.-Ditto, ditto, for Kent's furnaces, round ends. ".35 2844. —Ditto, French, thin and strong, No. 5, 2-x3l. ".30 2845.-Ditto, ditto, ditto, No. 6, 2jx3. 4".35 2846.-Ditto, ditto, ditto, No. 7, 3x4j. 4".45 OF CHEMICAL AND PHYSICAL APPARATUS. 137 2847.-Muffles, French clay, best. A B C D E F G - I 3 34 44 34 44 44 44 44 34 34 44 5 44 54 6 61 74 44 41 6 64 74 74 8 84 10 11 Price,.50.60.70.75 $1.00 1.10 1.20 1.50 2.00 each. 2848. —Mullers, Glass. 3 in., $1.25 4 in., 2.25. Slabs for above. See Plates. Ditto, Agate. See Agate Slabs, with Muller. 2857 2849 2853 2855 2856 2849.-Nicholson's Hydrometers, for ascertaining Specifie Gravity of solids, minerals, etc., made of brass. Each, $4.00 2850.-Ditto, ditto, ditto, including jar. " 6.00 2851.-Ditto, ditto, ditto, of tin. " 2.00 2852. —Nitrogen Bulb, Will & Varrentrapp's, 3 bulbs. ".65 2853.-Ditto, ditto, ditto, 4 " ".75 2854.-Ditto, Limbs, Liebig's, for connection. ".75 2855. —Nitrous Oxide Gas, apparatus for forming. " 3.50 2856.-Ditto, ditto, ditto, smaller. " 2.50 Nipper Taps. See Pinch Cocks. 2857. —Nipple Shells, French, with ring. Per doz., 4.50 2858.-Nursing Bottles, ditto. Per doz., $1.25 2859.-Ditto, ditto, corks. Per doz., $.50 2860. —Ditto, ditto, tops box-,,ood. Per doz., $1.00 2856 138 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE'2861 H__..-_....._, —— = —---. 2862 2865 2875 2861.-Oil Receivers, Florentine. Pints,.75 quarts, $1.00 each. Organic Analysis. See Apparatus for. Optical Apparatus. See Optics. Oxygen Retorts. See Gas Generators. Oxhydrogen Blow-pipe. See Blow-pipe. 2862.-Ozonometer, Sieman's. 2863.-Ditto, to attach to the new Borchard electrical machine, for collecting ozon $6.00 2864.-Page's Rotating Apparatus. 16.00 2865.-Ditto, Revolving Electro-Magnet. 8.00 2866. —Paper, bibulous. Per bundle of 1000 sheets, 4.50 Ditto, filtering. See Filtering Paper. 2867.-Ditto, glazed. Per sheet,.05; per quire,.75 2868.-Ditto, litmus. Per sheet,.05 2869.-Ditto, neutral. ".05 2870.-Ditto, parchment. ".25 2871.-Ditto, tea, No. 1. Per quire,.10 OF CHEMICAL AND PHYSICAL APPARATUS. 139 2872.-Paper, tumeric. Per sheet,.05 2873.-Ditto, weights.50 2874.-Pallettes, small. Each,.25 2875.-Ditto, large. ".30 2876. —Pans, expectorating. ".25 2877.-Ditto, for gold washing. ".50 Ditto, horn. See Horn Pans. 2878. —Parabolic Reflectors. 13 in., $16.00 15 in., 25.00 10 in., 13.00 2879.-Ditto, ditto, nickleized or silvered, additional. $2.50 2882 2880 2881 2881 2884 2880.-Perculators, Mohr's glass and tin. Each, $8.00 2881. —Ditto, of glass. Pints,.50 gall., $1.00 each. See also Displacement Apparatus. 2882.-Perfume Bottles, French, fancy shaped, ground, stoppered with ball top. Per 100, $7.50 2883.-Ditto, ditto, amber and blue diamond, pressed, 1 oz. Ea..40 2884.-Ditto, ditto, ditto, pressed, ball stopper. ".50 2885.-Ditto, ditto, green, cut crystal glass. " 3.00 2886.-Ditto, ditto, square, crystal, cut top. Per doz., 6.00 2887.-Pestles, porcelain. Each,.50 2888.-Photometers, Bunsen's, graduated, 5 foot bar, with scale, diaphragm and candle holders. Each, $30.00 2889.-Ditto, regulation burner. " 5.00 2890.-Ditto, candles. Per lb.,.75 Ditto, Meter. See Gas Meter. 140 E. B. BENJAMIIN'S DESCRIPTIVE CATALOGUE 2888 2891.-Photographic Baths, porcelain, small. Each, $4.00 2892.-Ditto, ditto, ditto, large. " 5.00 2893.-Ditto, Dishes, porcelain, shallow, with lip, Royal Berlin, 9 inches. Each. $2.75 2894.-Pill Boxes, for rounding and silvering pills. ".75 2895.-Ditto, tiles. 5 6 7 in..40.50.75 each. 2896.-Pincers, gas, with corrugated jaws, for handling gas and other pipes, with screw driver on handles. $1.00 to 1.50 2897 2898 2899 2900 2901 2897.-Pinch Cocks, Mohr's, brass. Small,.25 large,.35 each. 2898. —Ditto, ditto, with bent lip and screw, to regulate the flow of liquids. Nos. 1 2 3 4.30.40.50.60 each. 2899.-Ditto, ditto, with rubber attachment and glass tips. Small,.35 large,.65 each. OF CHEMICAL AND PHYSICAL APPARATUS. 141 2900.-Pinch Cocks, Mohr's, with steel spring and heavy plate brass, with steel bow, having number and register screw in fractions to regulate the drops, in careful estimation. Ea. $1.75 2901.-Ditto, ditto, brass wire, with protecting plate. ".25 2902. —Ditto, ditto, Bunsen's. Per doz., 7.50 2903.-Ditto, ditto, Dr. Squibb's modification, arranged to employ but one screw. Each,.50 2904.-Pipes, for hydrogen bubbles..75 2905.-Ditto, organ; special prices. 2906 2907 2909 2910 2911 2912 2913 2906.-Pipettes, straight, 6 in. long, drawn to the end..Each,.10; per doz., $1.00 2907.-Ditto, cylindrical, or ball. Each,.25 2908. —Ditto, with rubber ball, plain. ".50 2909.-Ditto, fixed, or volume. 1 2 5 10 20 25 30 50 75 100 150 200 cc..15.20.25.30.35.40.45.50.65.85.90 $1.00 each. 2910.-Ditto, Ettling's. Each,.75 2911.-Ditto, filling. " $1.00 2912.-Ditto, dropping, graduated, 100 in 10..75 2913.-Ditto, Mohr's, graduated. 5 5 10 10 10 15 20 cc. MS O -1101.1 o L I -l-.70.75.75.90 $1.00 1.10 1.15 each. 25 25 30 50 50 100 100 cc. i1 i X L 1 i $1.15 1.20 1.20 1.35 1.40 2.00 2.50 each. 2914.-Ditto, ditto, graduated from 0~ to 5~, 0~ to 10~. 1 in-f $1.00o in o, 75 in -6.85 each. 1 in ir.75 142 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2915.-Pith Balls, per dozen..25 2916.-Ditto, Birds, " $1.25 2917. —Ditto, Images, per pair..7a 2918.-Plates, brass sliding rod, hook and check screw. Ea. 5.50 2919.-Ditto, earthen, glazed, 6 inch. ".25 2920 2925 2926 2921 2928 2933 2934 2920.-Ditto, ditto, perforated, with rim around the top, flat. 3 4 4 5 in..25.30.35.40 each. Ditto, glass. See Covers and Glass Plates. 2921.-Ditto, porcelain, deep, rectangular. Each, 1.25 2922.-Ditto, ditto, for arsenic and color tests, assorted sizes. Each,.50 to $1.00 2923.-Ditto, porcelain, perforated. Small,.90; large, $1.00 2924.-Ditto, porous, square. 41 41 51 5~ in..40.45.50.55 each. 2925.-Platinum Dishes.'I i 1 2 3 4 oz. Per grain,.3 2926.-Ditto, Boats, for combustion. 21 24 3s1 in. ".3 2927. —Ditto, Spatulas. 34h 31 3- 3+1 41 in. ".3'2928. —Ditto, Spoons, with or without covers; 2 sizes, ".3;2929.-Ditto, Scrap. ".1j 2930.-Ditto, Sponges, German. Each,.30 2931.-Ditto, ditto, French. " 75 Ditto, spongy. See Chemicals. 2932.-Ditto, Jets or Tips. Each,.75 to $1.00 2933.-Ditto, End Tongs, steel, double bend. Each, 6.00 2934.-Ditto, ditto, German silver, double or single bend. " 6.50 OF CHEMICAL AIND PHYSICAL APPARATUS. 143 Platinum Retorts, special prices. 2935. —Ditto, Sheet and Foil, ordinary size and thickness. Per grain,.2j 2936.-Ditto, wire ditto, ditto, fine as hair. Per foot,.25 2937.-Ditto, Foil, very thin for batteries. Per grain, 3~ 2938.-Ditto, Wire, for blow-pipe. Per foot.30 to.60 Ditto, ditto, and Foil Gauze..29:)9. q~, 2941 2945 2939.-Ditto, Covers. 11, 1, 1~, lt, 13, lj, 2 in. Per grain,.3 2940.-Ditto, Crucibles. ~, ~, 1, 1, 2, 3 oz., and larger sizes, special to order. Per grain,.3 2941.-Pliers, steel wire, round ends, square ends, and cutting ends. Each, $1.00 to 1.25 Pneumatic Apparatus. See the end of the book. 2942.-Ditto, Cistern. $12.00 2943.-Ditto, Pumps, Sprengel's mercurial, of glass, in fine polished walnut frame, French make. This article being excessively frail and delicate, is only imported on special order, with deposit, and at the risk of the purchaser. Each, $150.00 2944.-Ditto, ditto, or lever Air pump, heavy, hard wood frame, 40 inches high, barrel 12x3s inches, and plate 12 inches in diameter, with manometer attached. Each, V200.00 294[5.-Ditto, ditto, ditto, Carre's, with separate arrangements, for exhausting air and freezing water on same apparatus. Each, $150.00 144 L B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2946 2946.-Pneuniatic Pump, on flat base; barrel 8x2j inches; plate 10 inches diameter, with manometer. Each $100.00 2947.-Ditto, ditto, with cylinder, 7~x2~ inches, and plate 8 inches diameter, barrel placed vertically. Each, $50.00 2948.-Ditto, ditto, barrel 7x1 inches, plate 71 inches diameter. Each, $25.00 2955 2951 2952 2956 2949.-Ditto, ditto, barrel, 7xl inches; plate, 6 inches diameter. Each, $18.00 2950.-Ditto, ditto, without any stopcock. " 15.00 2951.- Ditto, ditto, not mounted, for organic analysis. " 10.00 2952. —Ditto, ditto, " " 15.00 OF CHEMICAL AND PHYSICAL APPARATUS. 145 2953.-Pneumatic Trough, of tin, japanned, 9x12~, with shelf 2954.-Ditto, ditto, ditto, A 11x15 in., with shelf. $3.50 2955.-Ditto, ditto, ditto, 13x16 x12 in., with shelf. $5.00 2956. —Ditto, ditto, of best annealed glass, without a joint, without shelf, 10x5 in. $4.50 2957.-Ditto, ditto, ditto, ditto, 12x6 in. $7.00 2958.-Dittb, ditto, ditto, ditto, 14x7 in. $8.50 Polariscope. See Turmaline Pincers. 2959 2959.-Polarization Apparatus, Mitscherlich's, careIully constructed, on a metallic stand, double tubes. $60.00 2' 61 2960.-Ditto, ditto, Wild's, for the examination of sugars, syrups, and beet sugar, in a fine polished mahogany case, with tubes, lamps, etc., complete. $17-.00 2961.-Ditto, ditto, Soleil's, of finely polished brass, with three 146 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2962 tubes, complete, in a fine polished mahogany box, lock, key, etc., with instructions. $150.00 2962.-Ditto, ditto, according to Soleil-Ventzke, with microscope for the micrometer scale, 1 tube 100 millimeters, and 1 tube 200 millimeters; complete, with the apparatus and Instructions which usually come with this instrument; also having Dr. Scheibler's attestation as to its accuracy, it having been thoroughly tested by him. $225.00 2964 2965 2966 2968,963.-Ditto, ditto, Norremberg's, for the analyzing of light. Imported only to order. $60.00 Pressure Boards. See Gas Bags. 2964.-Pomades, glass. 1 oz., $1.25 2 oz., 1.50. Ditto, porcelain. See Jars. OF CHEMICAL AND PHYSICAL APPARATUS. 147 Porous Cups. See Cells. Ditto, Plates. See Plates. 2965.-Potash Bulbs, Mitscherlich's. Each,.60 2966.-Ditto, ditto, Liebig's latest form. ".75 2967.-Ditto, ditto, Mohr's. ".90 2968.-Ditto, ditto, Geissler's. " $1.00 2970 2969 2971 2973 2976 2969. —Ditto, Pipettes. Each,.30 2970.-Precipitating Glasses. 4 8 16 32 oz. I gall..25.30.40.60.80 $1.10 each. 2971.-Preparation Glasses, flat bottom, thin glass. 6x1l 7x1 7WxlI 8x1l in. $1.25 1.40 1.50 2.00 per doz. 2972.-Ditto, ditto, round bottom. See Specimen Tubes. Ditto, Jars. See Jars for Analytical purposes. 2973. —Prisms, hollow bottle, 60 deg. angle. Each, 7.50 2974.-Ditto, ditto, extra fine, ground, of one piece of glass, and carefully stoppered, by Steinheil. Each, $50.00 2975.-Ditto, ditto, mounted in brass, on stand. " 15.00 2976.-Ditto, ditto, series of 3, mounted.. " 30.00 2977.-Ditto, flint glass, 3 in. ".75 2978.-Ditto, ditto, 4 in. " 1.10 2979.-Ditto, ditto, 5 in. " 2.00 2980.-Ditto, ditto, 6 in. " 3.00 2981.-Ditto, for dark chamber, 15 lines. " 2.00 2982.-Ditto, " " 21 " " 2.50 148 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 2983. —Prisms, acromatic, 30x27 m. m. Per pair, 5.00 2984.-Ditto, ditto, 35x32 " " 6.00 2985. — itto, ditto, dio, 40x38 " " 7.25 2986.-Ditto, ditto, 45x43 cc" 9.00 2987. —Ditto, equilateral flint, 33x30 m. m. Each, 4.00 2988.-Ditto, ditto, 35x33 " " 5.00 2989. —Ditto, Nicol's assortment. Each, $6.00 to 10.00'2990 2992 2993 2994 2990.-Proof Glasses. $Each, 1.25 2991.-Punch Sticks, with porcelain ends, for crushing crystals in deep vessels, etc. Each,.25 2992. —Pulse Glasses. (See also Water Hammer.) Each,.50 2993. —Pumps, glass model, for lifting. " $1.50 2994.-Ditto, ditto, for forcing and lifting. " 1.50 2995.-Ditto, Hydraulic, for blowing, by barometric pressure. ~ Each, $30.00 2996.-Ditto, glass apparatus, for showing the principle of the forcing pump as applied to the fire engine. Each, $5.00 2997. —Ditto, Bunsen's quick filtering apparatus, consisting of pump, platinum cone, mould and holder, set of funnels, bottles and support. Complete, $18.00 2998.-Pungents, white,. or large open mouthed, ground, stoppered bottles. 1 oz.,- $4.50 2 oz., 5.00 per doz. OF CHEMICAL- AND PHYSICAL APPARATUS. 149 2999 3000 3001 3003 3o10 2999. — Pungents, amber, large open mouthed.: 1 oz., $4.50 2 oz., 5.00 per doz. 3000.-Ditto, cut glass, with ground stopper and hinged silver caps, assorted colors. No. 1, $20.00; No. 3, 35.00 per doz. 3001. —Ditto, cut glass, union or double ends; one end hinged and the other screw, silver top, assorted- colors. No. 1, $35.00 No. 3, 45.00 each. 3002.-Ditto, ditto, ditto, gold plated on silver. No. 1, $45.00 No. 2, 65.00 each. 3003.-Ditto, cut glass, with ground stopper, and hinged caps, gold plated on silver. No. 1, $25.00 No. 3, 40.00 per doz. 3004. —Pyrometers, on mahogany base, with dial and needle, spirit lamp, brass and iron rods. Each, $6.00 3005.-Ditto, ditto, larger, with spirit reservoir of brass, running the whole length of the apparatus, for heating the rods uniformly, having sliding cap to shut off the flame. $12.00 Quetschhahne. See Pinch cocks. Quick Filtering Apparatus. See Filtering Apparatus. Quilled Receivers. See Receivers. 3006. —Radiator, Leslie's. $2.50 3007.-Rasps, round, for filing corks. 4 5 6 7 8 in..25.30.40.45.50 each. Reagents. See Chemicals at the back of the book. 3008.-Reagent Boxes, for sets of 9 reagents, filled. Each, 2.50 3009. —Ditto, ditto, ditto, having places for blow-pipe, platinum box, tweezers, etc., filled. Each, $4.00 3010. —Ditto, ditto, including blow-pipe, tweezers, etc. " 6.00 ~3011.-Ditto, Chests, medium size. " 10.00 3012.-Ditto, ditto, large. " 12.00 3013.-Receivers, for retorts, plain, genuine Bohemian glass. 2 24 5 galls. $2.00 3.50 5.00 each. 160 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3012 3014.-Receivers, for retorts, tubulated, unstoppered. 8 16 32 oz..45.55.70 each. 3015.-Ditto, Bohemian glass, quilled. 8 oz. 16 32 ~ gall. 1.70.80 $1.20 1.70 2.00 each. 3016. —Ditto, glass, tubulated and stoppered. 2 oz. 4 8 16 32 ~ gall. 1.30.40.50.60.75 $1.00 1.50 each. 3013 3U14 3015; o', ozo 3017.-Ditto, spherical, long-necked and ring top, tubulatures at the side, of Bohemian glass. i 1 2 gall. $2.00 3.00 4.00 each. 3018.-I)itto, Florentine, French, plain, quarts. Each,.75 3019.-Ditto, ditto, Bohemian, with ground glass stopper in neck. 1 qt. J gall. 1 $1.50 2.25 2.50 each. OF CHEMICAL AND PHYSICAL APPARATUS. 151' 3020.-Receivers, porcelain. 4 oz., $1.25 8 oz., 1.50 each. 3021.-Ditto, earthen-ware, i gall. Each, $1.25 3027 302'2 3023 3025 3029 3031 3022.-Reduction Tubes, of glass, with 1 bulb. Each.20 3023.-Ditto, ditto, ditto, 2 " ".30 3024.-Ditto, ditto, ditto, 3 " ".50 3025.-Ditto, ditto, ditto, 1 "bent end.".25 3926. — Ditto, ditto, porcelain, for reduction by hydrogen. " 1.25 Reflectors. See Parabolic Reflectors. 3027. —Retorts, plain glass, single tube, best Bohemian glass. loz. 2 4 8 16 32 E gall. 2 4 7.20.25.30.40.45.60.90 $2.25 3.50 6.00 each. 3028.-Ditto, ditto, ditto, with double tube, Liebig's. 8 oz.,.80 16 oz., $1.00 each. 3029.-Retort Glass, plain Bohemian, two bulbs in the neck. for preparing oxygen gas from red oxide of mercury. 2 4 6 oz..30.35.55 each. 3030.-Retorts, glass, light, French tubulature, without stopper. I oz.,.12 2 oz.,.15 each. 3031.-Ditto, ditto, Clark's, plain, with tube receiver. Each,.50 3032.-Ditto, ditto, Faraday's. ".50 3033 3034 3033.-Ditto, ditto, best Bohemian, tubulatured and stoppered. 2 oz. 4 8 16 32 gall. 1 3 4 5 7.35.40.50.55.70 $1.20 1.50 3.50 4.50 7.00 9.00 each. 152 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3034.-Retorts, porcelain, best, glazed inside, tubulated and stoppered. 4 8 16 oz. $1.40 1.65 1.90 each. 3035.-Ditto, ditto, detached heads. Each, $1.50 3036.-Ditto, glass, German, for micro-chemical operations, plain, assorted sizes. Per doz., $2.50 3037.-Ditto, tubulated and stoppered. " 3.30 Retort Funnels. See Funnels. 3038.-Retorts, stoneware. 4 8 16 32 oz. $1.00 1.25 1.50 2.00 each. 3039.-Ditto, iron, loose cover. ~ 1 2 3 4 8 16 pts. $2.75 3.00 3.75 4.25 5.00 6.50 10.00 each. 3045 3040 3053 3059 3040. —Ditto, copper, loose heads, ground and fastened with clamp, for making oxygen. 1 qt., $4.50 2 qts., 6.00 each. 3041.-Ditto lead, for making hydrofluoric acid. Each, $5 to 25.00 3042.-Ditto, platinum, according to size. Per gramme,.40 to.45 Ditto, holders. See Supports. Revolving Electro-Magnet. See Magnet. 3043.-Riders, of aluminum. Each,.75 Ring Burners, various kinds. See Burners. 3044.-Rings, concentric, sets of 7..80 Ditto, of straw. See Straw Rings. 3045. —Roasting Dishes, according to size. Per 100, $7.50 to 10.50 3046.-Roasts, Plattner's, used in quantitative analysis of metallic ores before the blow-pipe. Each, $2.00 3047. —Roasting Charcoal, pieces. Per doz.,.75 OF CHEMICAL AND PHYSICAL APPARATUS. 153 3048. —Roasting Charcoal, forms for making, complete. Per doz., $3.75 3049.-Rods, of glass, for electric excitation. Each, 1.00 3050.-Ditto, ditto, ordinary, assorted sizes. Per lb.,.60 3051. —Ditto, ditto, extra large, Bohemian, or French, assorted sizes Per lb., $1.00 Ditto, ditto, stirring. See Stirrers. 3052.-Rod of Shellac, for resinous excitation. 2.00 3053. —Rubber Balls. Small, $5.00 large, 6.50 Per doz., 3054.-Rubber Finger Tips, for protecting fingers in handling acids and poisonous substances in the laboratory and in the dissecting room; thin, and of the very best quality. Each,.10 3055.-Rubber, sheet, French, thin. No. 8,.50 No. 11,.60 per oz. 3056.-Ditto, stoppers, American, solid. Nos. 5- 5 4 3 21 2 1 $1.50 1.50 2.25 3.75 5.00 6.00 9.00 per 100. 3057.-Ditto, ditto, of best French, flexible unvulcanizedgum, each cork accurately conical and perfectly smooth, cast in my own moulds, solid, 1, 2, and 3 holes. Nos. 1 2 3 4 5 6 7 8 9 10 11 12.08.09.10.15.20.25.30.35.50.60.65.75 each. Or $9.00 per lb. 3057 No. 9, 14 x 11~ x 1"8, 1$ x Ii x Sl; 6, 1 X x {~ x Other numbers, sizes in proportion to above. 3058.-Ditto, ditto, ditto, in the form of Whipstock, to cut off, as required. Each, $10.00 3059. —Ditto, Syphon Primers. See Rubber Tubing. " 1.50 3060. —Ditto, Urinals. " 1.00 3061. —Rupert Drops. Per doz.,.50 154 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE 3066 3079 30622 3082 3075 3069 3084 3062.-Russian Spirit Lamps. Each, $2.00 Saccharimeters. See Polarization. Saccharometers. See Hydrometry. Safety Funnels. See Funnel Tubes. Ditto, Lamps. See Davy's. 3063.-Salometers. " 1.25 3064.-Sand Baths, cast iron, with handles 8j to 9 in. 2.25 3065.-Ditto, ditto, spun, best, French, deep, very stout. 4 5 6 7 in..40.50.60.75 each. 3066.-Ditto, ditto, shallow. 2 3 4 5 6 in..20.25.30.35.40 each. 3067. —Ditto, ditto, copper, 3, 4, 5, and 6 inches. Per inch,.10 3068. —Ditto, Glasses, for mariners, wood. 15 seconds, $1.25 30 seconds, 1.50 3069.-Ditto, ditto, small, of wood, 3, 5, 10 minutes. Each,.50 3070.-Ditto, ditto, of brass, small, 5 minutes. ".,5 3071.-Saw, small, with cocoa handle..75 3072.-Scales, apothecaries, with brass beams and horn pans, without pedestal. 4 41- 5 6 7 8 in. beam. $1.40 1.50 1.85 2.10 3.00 4.00 each. 3073.-Ditto, ditto, with brass pans. 4 5 6 in. beam. $1.00 1.25 1.50 each. 3074.-Ditto, ivory, for measuring the button in assay accurately. Each, $5.00 3075.-Ditto, prescription, various. 5.00 to 20.00 3076.-Ditto, small, in tin boxes, with weights. Each, 1.25 OF CHEMICAL AND PHYSICAL APPARATUS. 155 3077.-Scales, prescription, in morocco cases. Each, $1.25 3078.-Scale Pans, of horn, adjusted with silk cord. Nos. 1 2 3 4 5 6 7 8 9 Diam., 13 2 2~ 3 3~ 4 4~ 41 51 in. Price,.40.50.65.75.90 $1.25 1.45 1.75 2.00 each. See also Balances, page 17. 3079. —Schuster's Dropping Flasks, stoppered. Each,.25 3080.-Scissors. Each,.50 to $1.00 3081.-Ditto, tinsmiths', for cutting metals. " c 2.50 3082.-Scoops, of horn. ".12 3083. —Scoriflers, Freiburg usual form. Per 100, 3.50 3084.-Ditto, ditto, urn shape. " 20.00 3085.-D)itto, holders, of iron, with 9 partitions, for holding scorifiers, when various assays are under examination together. Each, $1.50 3086.-Scorifying Moulds, of cast iron, with 9 small round cavities Each, $1.00 Scorifier Moulds. See Moulds. Ditto, Tongs. See Tongs. /!, 3087. —Scratch Brushes, or Button Brusaes, for use in assay, of 3086 3091 hard bristles. Each,.50 3088.-Ditto, Brush Wire, Per lb., $5.00 3089.-Screen, of iron wire, to surround the Bunsen or spirit lamp, when burning under a tripod, to protect the flame from currents of air. Each, $1.00 3090.-Screws, brass head. ".10 3091.-Seidlitz Powder Cups, with partitions. ".60 Sets of chemical anoDaratus for beginners. See the back of the book. Separatory Bottles. See Bottles. Ditto, Funnels. See Funnels. 3092.-Shades, Lilly, for covering rare objects. Each, $2 to 15.00 3093. —Sharpeners, for knives..50 3094.-Sieves, brass, 10, 20, 30, 40, 50, 60, 80, 100 meshes to the inch; 5 inches. Each,.50 to $1.25 3095.-Ditto, ditto, ditto, 7 inches. ".75 to 1.50 3096.-Ditto, ditto, ditto, 12 " 1.00 to 2.00 3097.-Ditto, horse hair. " 1.25 1(i6 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3098.-Sieves, silk bolting cloth, small, French. 3 4 5 6 in..50.75 $1.00 1.50 each. 3099._-Ditto, box, Griffin's, with two partitions. Each, $2.50 3100.-Ditto, Plattner's, for use before the blow-pipe. ".50 3101. — Silver, pure, for mineral tests. Per ounce, 3.00 3102. —Skins, Cat, for electrical excitation purposes..Each, 1.25 3103. —Ditto, Chamois, for handling brass apparatus. ".75 3104.-Slips, of glass, with edges carefully ground, to prevent cutting the hand, for the testing of small quantities of liquid in quantitative analysis; also convenient for color test, 1x3 in. Per doz.,.75 3105. —Ditto, of unglazed porcelain, to try streak or color of minerals. Per doz.,.75 to $1.00 Smelling Bottles. See Pungents. 3106.-Soda Paper, for preparing cartridges in blow-piping..50 3107.-Soda Water, apparatus for making. $7.50 3108 3109 3110'11'12'13'14'16 3108.-Sodium Spoon, for holding sodium in water under cylinder..50 3109.-Ditto, Flame, apparatus for inverting. $3.50 Soufflets, cylindric, or glass-blowing table. See Glass blowers' table. 3110.-Spatulas, bone, with pointed handle. 44 in.,.20 5 in.,.25 each. 3111. —Ditto, with spoon. 4 5i 6 in..20.25.30 each. 3112.-Ditto, bone, with double end. Each,.25 3113.-Ditto, and spoon, ivory, assorted, small. ".15 OF CHEMICAL AND PHYSICAL APPARATUS. 157 3114.-Spatulas, of glass, 6 inches. Each,.15 3115.-Ditto, of brass, double end, 4 inches. ".75 3116.-Ditto, and spoon, of brass, adapted for weighing small quantities. $1.25 3117.-Ditto, of horn. 24 4 5 6 7 74 8 in..10.15.20.25.30.35.40 each. 3118.-Ditto, ditto, with spoon. 3 34 4 44 5 54 6 7 8 in..15.18.20.23.25.28.35.40.50 each. 3119.-Ditto, platinum. Per grain,.3 3120 3121 3122 3123 3126 3128 3120.-Ditto, porcelain, with handle. 4j 54 64 74 84 in..40.45.50.65 70 each. 3121.-Ditto, ditto, square end. 114 141 174 in..75.90 $1.25 each. 3122.-Ditto, ditto, double. 114 141 17 in..50.60.90 each. 3123.-Ditto, ditto, with spoon. 11 14i 17 in..55.70 $1.00 each. 3124. —Ditto, steel, double ends. Each,.25 to.75 3125.-Ditto, ditto, cocoa handle, length of blade3 4 5 6 7 8 9 10 in..25.30.35.40.50.60.80 $1.00 each. 3126.-Specific Gravity Bottles, plain, solid stopper, cut glass 100 500 1000 grs. $1.00 1.75 2.50 each. 3127.-Ditto ditto, ditto, ditto. 10 25 50 100 grams. $1.25 1.50 1.75 2.00 each. 158 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3128.-Specific Gravity Bottles, perforated stopper, light blown glass. 100 250 500 1000 grs..75 $1.00 1.50 2.00 each. 3129.-Ditto, ditto, ditto, ditto, in fine chamois-lined leather cases, with counterpoise. 100. 250 500 1000 grs. $2.50 3.00 4.00 5.00 each. 3130.-Ditto, ditto, ditto, ditto. 10 25 50 gram's. $2.50 3.50 4.00 each. 3131.-Ditto, ditto, ditto, ditto, in case, with fine chamois-lined leather case, of cut glass, with solid stopper. 25 grams. $4.00 100 grams. 7.50 each. 3132.-Ditto, ditto. ditto, ditto. 100 500 1000 grs. $3.50 4.00 4.50 each. 3133.-Ditto, ditto, ditto, with thermometer. 50 grm's, 3.50 3134. —Ditto, ditto, Flasks, round, stoppered, 1000 grs. Ea. $2.00 3135.-Ditto, ditto, ditto, not stoppered, 1000 ".75 3136.-Spectroscopes, Browning's, for direct vision, with five prisms. Each, $15.00 3137. —Ditto, ditto, with cover, larger. " 18.00 3143 3138 3147 3152 3138.- Ditto, ditto, "lHelaelberg laboratory," single prism, with 2 lamps, millimeter scale, 2 stands, 3 scales on drawing paper, 1 small chart and an assortment of platinum holders for the salts, complete. Each, $65.00 3139.-Ditto, Browning's elegant " model," two prisms, in a highly polished mahogany case, with lock and key, and handle to carry it, having a swivel arrangement for the telescope, so that the OF CHEMICAL AND PHYSICAL APPARATUS. 159 spectrum may be extended and clearly defined, with tangent screw motion. It will widely separate the D lines. Ea. $160.00 3140.-Spectroscopes, larger; imported only on special order. Spectroscopic Charts. See Charts. 3141.-Ditto, Lamps, for evaporating metallic substances. Ea. $3.50 3142. —Ditto, Stand, for holding salts in lamp flame. " 1.50 3143.-Ditto, Lamp and Stand together. "' 4.75 3143A.-Ditto, ditto, for alcohol. " 2.50 Ditto, Support. See Supports. 3144. —Spectrum, Browning's lantern arranged for showing on screen, small size. $50.00 3145. —Ditto, large size, complete. 150.00 Spirit Lamps. See Lamps. 3146.-Spiral, or Spotted Tube. $3.00 to 5.00 3147.-Spoons, Blow-pipe, of iron. Each,.25 to.50 3148. —Spoons, bone. 2~ 5 6 in..10.20.25 each. 3149.-Ditto, brass, turned, for weighing powders. Each, $1.25 3150.-Ditto, tea, of glass. Per doz., 1.50 3151.-Ditto, dessert, of glass. Each,.40 3152. —Ditto, table, " ".50 3153.-Ditto, dipping, ladle form, of glass. " 1.00 3154.-Ditto, horn, first quality. 3 6 7 8 9 in..18.25.30.35.50 each. 3155. —Ditto, horn, ordinary. 5 5 7 71 8 in..15.18.20.25.30 each. And wide bowl, 71 in.,.40. 3156.-Ditto, iron. Each,.40 3157. —Ditto, porcelain. 54 7 9 94 13~ in.,30.50.60.75 $1.50 each. 3158. —Ditto, tea, porcelain. Per doz., $3.00 3159. —Ditto, ditto, ditto, perforated, for dipping crystals or leeches, oval. Each,..50 3160. -Ditto, ditto, ditto, ditto, round. ".60 3160 3161.- -Sticks, of prepared coal, for breaking glass. Per doz.,.60 3162,- -Ditto, ditto, ditto, ditto, larger. ".70 160 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3163 3177 3178 3180'"'[ 3)186 3176 3198 3163.-Stills, of copper, with worm, tinned. i 2. 3 galls. $12.00 15.00 20.00 each. 3164.-Stirrers, of glass, ends polished. 6 9 12 in..30.45.60 per doz. 3165.-Stool, insulating. $5.00 3166.-Stop Cocks, of brass, mounted on foot, with double ends, for tubing, with screw knobs, for securing to table. Each, $1.50 3167.-Ditto, ordinary. " 1.25 3168.-Ditto, with double ends, for tubing. " 1.25 3169.-Ditto, one end for tubing, 1 male screw. " 1.25 3170.-Ditto, double male screw. " 1.25 317 1.-Ditto, ditto, female " " 1.25 3172.-Ditto, male and female screw. " 1.25 31 73.-Ditto, brass, one end for tubing andsone for inhaling. Ea. 1.00 3174.-Ditto, earthenware, English. 41 in. long, $3.00 91 in. long, 4.50 each. 3175.-Ditto, ditto, French. 7~ 9 10 12 15 in. $2.50 3.00 4.00 5.00 6.00 each. 3176. — Ditto, glass, for vinegar and acids, small. Each, 1.25 3177.-Ditto, ditto, Geissler's, of glass, for connections. " 1.50 3178.-Ditto, ditto, heavy. " 1.50 3179.-Ditto, for gas generators. " 1.25 3180. —Ditto,Deleuil, of silver, for assay, by the wet way. " 30.00 OF CitEMICAL AND PHYSICAL APPARATUS. 161 3181,- Stop Cocks, brass, for Marsh's arsenic test. Each, $1.50 3182. —Ditto, one end bent and the other end ground, for fitting tubulatures, of glass. Each, $1.25 3183.-Ditto, of glass, one end enlarged to receive a cork." 1.25 Stoppers, caoutchouc. See Rubber. 3184.-Storm Glasses, plain. " 1.00 3185.-Ditto, with thermometer. " 2.50 3186.-Stoves, gas, small vulcan. ".75 3186A.- Ditto, ditto, larger. Nos. 1 2 3 81.25 1.50 1.75 each. 3187.-Ditto, Kerosene. No. 3, $5.00 No. 4, 6.00 each. 3188. —Ditto, ditto, rwith boiler, for heating purposes. Each, $4.50 3189.- Straining Baskets, porcelain, with handle on the side. Each, $3.25 3190.-Ditto, with handle on the top, shallow. " 3.00 3191.-Ditto, ditto, deep. " 3.50 3192. —Ditto, earthenware, with handle on the side. Each, $2.00 to 3.00 3193.-Ditto, with handle on top. " 2.50 to 3.50 3194.-Straining Dishes, porcelain, perforated for crystals, flat bottom. 7 9 10~ 12 ins..75 $1.00 1.25 1.50 each. 3195.-Ditto, porcelain, round bottom, large size, glazed inside and out. 13 in., $3.50 15~ in., $4.50 each. 3196.-Ditto, porcelain, with handle on each side, holes small, 6 in. diameter. Each, $1.00 3197.-Ditto, porcelain, small hemispherical, with handle on one side. No. 1, $1.25 No. 2,.75 each. 3198.-Ditto, Plates, French, with rim around the top. 20 25 30 cc..35.40.50 3199.-Straw Rings, French plaited, for supporting round bottom vessels, dishes, flasks, retorts, 3 31 4~ 5j 7 9 in..18.20 22.27.35.40 each. Suction Tubes, for filling bulbs, etc., see Filling Tubes. 3200.-Supports, for potash bulbs, with hooks. Each, $1.50 162 B. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3202 3.204 3201.-Supports, for objects in lamp flame. Each, $1.50 3'202.-Ditto, for burettes, of brass, of light iron base, and clamps, with cork lining for two burettes. Each, 3.50 9203.-Ditto, of brass, new style, with porcelain foot for two burettes, for micro-chemical purposes, the holders shaped to the burette, and nicely cork lined. Each, $5.00 3206 3207 3208 3204.-Ditto, of brass, for two burettes, spring clamp, with cork lining, and fine oiled black walnut foot. $4.00 OF CHEMICAL AND PHYSICAL APPARATUS. 163 3205.-Supports, of iron, for two burettes, cork lined clamps Each, $3,50 3206. —Ditto, ditto, of soft wood, with cork lined jaws, for 1 $1.25 2 burettes, $1.50 3207.-Ditto, ditto, with round wooden foot, with clamps, hinged and cork lined, for 4 $3.50 6 burettes, $5.00. 3208.-Ditto, ditto, revolving, of highly polished pear wood, for 5 8 12 burettes, $4.50 5.00 6.00 each. 3209.-Ditto, for burettes, revolving, japanned tin, with base and staff, of walnut. 8 burettes, 4.00 each. 3213 3212 3216 3210 3215 3218 3210.-Ditto, ditto, pear wood, square porcelain base, with brass staff. 6 8 12 burettes. $5.00 6.00 7.50 each. 3211.-Support, Hoffman's, new, with four Bunsen's burners, of highly polished brass. $8.00 164 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3212.-Support, Mischterlich's, for the examination of fluids under the spectroscope. $7.50 3213.-Ditto, earthen, for crucibles, or "fromages.".20 3214.-Ditto, porcelain, for small dishes..25 3215.-Ditto, Table, including fork and drying tripod. 6 9 12 131 in. high..75 $1.00 1.25 1.50 each. 3216.-Supports, or Filter Stands, for single funnel. Each, $1.00 3217.-Ditto, or ditto, for two funnels, single arm. " 1.25 3218.-Ditto, ditto, for six funnels and double arm. " 1..25 3219.-Ditto, or Filtering Stands, to cover beaker, according:to Fresenius. Each, $1.25 3220. —Ditto, with large wooden ring. " 1.50 3221.-Ditto, with two wooden rings. " 1.50 3226 3233 3227 3234 3229 2236 3237 3222.-Ditto, of iron, with triangular base arranged for holding spirit lamp. Each, $1.50 3223. —Ditto, Hoffman's, with wood-lined rings. " 2.75 3224.-Ditto, wood, for sustaining tubes and connecting apparatus, black varnished wood, Griffin's form, 314. Each, $1.75 3225.-Ditto, ditto, ditto, ditto, mahogany. " 2.00 3226.-Ditto, Test tubes, for 13 tubes. c".75 OF CHEMICAL AND PHTYSICAL APPARATUS. 165 3227. —Supports, Test tubes, polished mahogany, with pins, for draining. Each. $1.50 3228.-Ditto, ditto, for 18 tubes. " i.O0 3229.-Ditto, ditto, mahogany, with drawer and draining pins. Each, $2.00( 3230. —Ditto, ditto, universal, circular. " 2.00 3231.-Ditto, ditto, japanned tin, for six test tubes, Each,.60 3232. —Ditto, for retorts, wire, two rings. ".90 3233. —Ditto, ditto, iron, " "$1.00 3234. —Ditto, ditto, " three rings. " 1.25 3235. —Ditto, ditto, brass, " with porcelain foot. " 4.50 3236.-Ditto, ditto, of wood, Gay Lussac form. " 1.25 3237. —Ditto, ditto, " Shellbach, round iron base, two joints and sliding clamp. Each, $2.00 3238.-Ditto, ditto, iron base, two joints and sliding clamps, polished. Each, $2.50 3239..-Ditto, ditto, French, upright. " 1.50 3240 3247 3250 3240.-Ditto, ditto, universal. " 2.00 3241.-Ditto, ditto, " fine quality, heavy. " 3.50 3242.-Ditto, ditto, " highly polished, pear wood. " 4.00 3243.-Ditto, feet of porcelain, round. ".50 3244. —Ditto, japanned, for flasks in Bunsen's quick filtering apparatus. Each, $3.50 Supports, other forms made to order. 3245.-Stand, of iron, with polished fork, Hoffman's. " 1.50 3246. —Ditto, " wood, with fork, small. ".75 166 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Swimmers. See Burette Swimmers. 3247. —Syphon, glass, plain. 12 in.,.25 15 in.,.30 each. Ditto, Acid. See Acid Syphons. 3248. —Ditto, pipette, glass, new style, various. Each,.75 3249.-Syringes, glass. Each,.50 to $1.50 32483248 3253 3254 3262 3250.-Ditto, metallic, male, in mahogany cases. Each, $4.00 3251.-Ditto, male and female,:' c 5.00 3252.-Ditto, Fire, of glass. " 6.00 Ditto, brass. See Air Pumps. 3253.-Tank, for holding solutions when under examination by the Lantern; consists of two glass plates, separated by rubber partition which forms the wall of the tank, on three sides. $3.50 32554. —Tantalus Cup. 2.00 3255.-Tapers,- wax, in small boxes. Per box,.25 3256.-Ditto, ditto, to burn in oxygen, etc. Per pair,.20 3257.-Telescope, with mounting support, on legs, made by the celebrated Merz, of Munich, in leather case, achromatic, power 50 times. $30.00 3258. —Telegraph, working model, with reel. 8.00 Telegraphic Apparatus, other, special to order. 3259.-Tellurian, for showing the phenomena of the seasons. $13.00 Test Chests. See Reagent chests. Tests, blow-pipe cases. See Blow-pipe Cases, etc., at the end of the book. OF CHEMICAL AND PHYSICAL APPARATUS. 167 1260.-Test Dishes, porcelain, for colored precipitates. Each,.25 1261.-Ditto, Glasses, conical, on foot, without lip. ".40 C262.-Ditto, ditto, French, ditto, ditto, with lip. I 1 2 4 8 16 oz..15.18.25.30.40.50 each. ]263. —Ditto, ditto, micro-chemical, of thin glasss, very small, made by blow-pipe. Per doz., $1.75 3264 3266 3269 3271 3272 3273 3274 3264.-Test Lead Measure, Plattner's. Each,.50 3265.-Ditto, ditto, Sieve, brass, Plattner's. ".50 Test Metals. See Minerals, at the back part of this book. 3266. —Test, Marsh's, arsenic. 75 3267.-Test Papers, assorted. Per sheet,.5 3268. —Test Tubes, infusible Bohemian glass, 6 x - in. Per doz., $1.25 3269.-Ditto, French and German, with the ends even thickness throughout; free from lhad. 3 4 5 6 7 9 10 in. long. to k a to 4 i to 4 85 to:} 1 1- 1 in. wide about..30.40.50.60.75 $1.50 2.25 per doz. Each one of the above Test Tubes is carefilly wrapped in paper. to keep them from chenical contact, and to preserve the lips from breakage. The diameters are' averaged. 3270.-Ditto, in nests of 3 6 9 16.20.30.50.70 each. 3271.-Ditto, with pasteboard cases, in nests of 6 9.40.60 each. 3272. —Ditto, on foot. I1~ 2 4 6 8 in..40.45.60 $1.00 1.25 per doz. 168 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3273. —Test Tubes, stoppered, 5 in. Per doz., $1.25 Test Tube Brushes. See Brushes. 3274. —Ditto, Holders, wood, new form. Each,.20 3275. —Ditto, ditto, brass, with sliding band. ".50 3276. —Ditto, ditto, " " wood handle. ".60 3277. —Ditto, ditto, wire, with wood handle. ".50 Ditto, ditto, and supports. See Supports. 3278.-Testing Slab, plain, of porcelain. ".50 3279 3281 3279.-Theatre Pantin, with glass pillars, for dancing figures. $15.00 3280. —Thermo Electric, pair of bismuth and antimony. $2.00 3281.-Ditto, ditto, Pile. Each, $30.00 to $35.0 3282.-Thermometers, Axillary. 6 in., $2.00 7 in., $3.00 each. 3283.-Ditto, Beer, accurately registered, Fahrenheit and Centigrade. Each, $2.00 3284.-Ditto, chemical, 8 in. long, up to 212 deg. Fah., paper scale in glass tube, and pasteboard cases. Each,.85 3285.-Ditto, ditto, ditto, ditto, 10 in. long. ".90 3286.-Ditto, ditto, ditto, ditto, 12 " " $1.00 3287. —Ditto, ditto, ditto, ditto, 15 " ".20 3288.-Ditto, ditto, ditto, ditto, up to 260 deg. 12 in. long, $1.25 15 in. long, 1.25 each. The largest thermometers are smallest iu diameter. 3289.-Ditto, ditto, Celsius paper scale, 50 to 100 deg. Each, 1.50 3290.-Ditto, ditto, Celsius, or Centigrade, up to J350 or 410 deg. Each, $2.00 OF CHEMICAL AND PHYSICAL APPARATUS. 169 3291.-Thermometers, Chemical, Milk scale, Fah., enclosed in glass tube, graduated up to 212 deg. Each, $1.50 3292. —Ditto, ditto, ditto, ditto, running from 280 to 330 deg. Each, $1.75 3293.-Ditto, ditto, ditto, ditto, running from 400 to 640 deg. Each, $2.00 3294.-Ditto, ditto, ditto, ditto, running up to 660 and 800 deg. Each, $2.25 3295.-Ditto, ditto, ditto, Fah. and Reamur, up to 700 deg. " 3.00 3296.-Ditto, ditto, ditto, engraved on the tube, Centigrade or Celsius, up to 100 deg. Each, $2.25 3297.-Ditto, ditto, ditto, up to 200 deg. " 2.50 3298.-Ditto, ditto, ditto, up to 360" " 3.00 3299.-Ditto, ditto, ditto, Fah., up to 200 deg. " 2.25 3300. —Ditto, ditto, ditto, ditto, " 400 " " 2.50 3301.-Ditto, ditto, ditto, ditto, " 600 " " 3.00 3302. —Ditto, ditto, ditto, ditto, above. " 3.50 3303.-Ditto, ditto, ditto, ditto, double scale, large, with brass top Fahrenheit, 300. Each, $3.00 3304.-Ditto, Differential, Leslie's. $2.00 to 4.00 3305.-Ditto, ditto, ditto, having two limbs, joined with tightly fitting ground glass stop-cock. Each, $4.00 3306. —Ditto, Day and Night, glass. " 4.00 3307. —Ditto, House, in mahogany, Fahrenheit and Centigrade, French spirit. Each,.40 3308. —Ditto, ditto, ditto; japanned tin, Fahrenheit. 6 9 12 in..50.75 $1.00 each. 3309.-Ditto, Medical, for ascertaining heat of the human body, during fever or otherwise. Each, $5.00 3310.-Ditto, Metallic, watch form, silver case. " 20.00 3311.-Ditto, ditto, revolving, for pocket, Fahrenheit and Centigrade, German silver case. Each, $10.00 3312. —Ditto, Sugar-house, French, accurately graduated, Fahrenheit and Centigrade. Each, $10.00 3313. —Ditto, Window, Milk glass, silvered, etc., Fahrenheit, Celsius, and Reanour. Each, $1.00 to $5.00 3314.-Thermometer Tubes. Each,.25 3315.-Thieves, for drawing or decantihg spirits, glass. ".75 170 E. B. BENJAMIN'S DESCRIPTITE CATALOGUE 3316.-Thunder House, mahogany. Each, $8.00 3317.-Tin Foil, for blow-pipe experiments. Per square foot,.15 3318.-Tissue Figure. $1.50 3319 3320 3322 3323 3319.-Tongs, coal. 13 14 17 in. $1.25 1.50 1.75 each. 3320. —Ditto, ditto, ditto, heavy, with twine wound handles to protect the hands from frost in cold weather. Each, $1.00 3321.-Ditto, crucible, 6 in. japanned iron. ".50 3322.-Ditto, ditto, single bend steel, 9 in. " 1.00 3323.-Ditto, ditto, double bend. " 1.25 3324.-Ditto, ditto, ditto, German silver. " 1.50 3325. —Ditto, ditto, ditto, nickleized. " 2.25 3326. —Ditto, ditto, steel, with heavy platinum points, double bend. Each, $6.00 3327. —Ditto, ditto, German silver, with heavy platinum points, double bend. Each, $6.50 3328.-Ditto, ditto, steel, with large double bend. " 1.50 3329.-Ditto, wrought iron, for sand crucibles, with ditto. " 1.75 3330.-Ditto, for lifting crucibles vertically, extra heavy. " 2.00 3331.-Ditto, ditto, French, double bend, 14 to 18 inches long. Each, $1.50 3332.-Ditto, ditto, wrought iron, single bend, heavy, for handling sand crucibles. Each, $1.00 to $1.25. 3333.-Ditto, cupel, bent in the ends, of steel, to surround the cupel. Each, $1.50 OF CHEMICAL AND PHYSICAL APPARATUS. 171 3334.-Tongs, cupel, of galvanized iron, single bend. Each, $1.50 3335.-Ditto, ditto, straight. " 1.50 3336.-Ditto, ditto, French, bent on the end, with strap 2.75 3329 3330 3331 3332 3333 3334 3335 3336 3337.-Ditto, Scorifier, one limb to fit around the scorifier, and one to fit over it, so that it can be moved in and out of the cupelle furnace very steadily. Each, $1.25 Tools for Blow-piping, in chests. See Blow-pipe Apparatus at the close of the book. 3338. —Torricellian Experiment. $4.50 3339.-Touries, or Carboys, with 2 necks and tubulature near the foot, of French earthenware, for the distillation of acids, etc. 60 litres, $12.00 100 litres, 15.00 each. 3340. —Ditto, connecting pipe, for above. Each, $1.50 3341.-Ditto, of German stoneware, glazed outside, 200 litres. Each, $50.00 3342.-Ditto, stoneware connections, for ditto. " 5.00 3343.-Ditto, set of 2, with connecting pipe. " 1.00 3344.-Trays, lead. Each,.50 3345.-Ditto, shallow porcelain, for holding jars containing corrosive liquids. Each,.20 to.40 12, BE. B. BENJAMINIS DESCRIPTIVE CATALOGUE 3337 3350 3339 3352 3353 3 3 6 3343 3360 3346.-Trays, walnut, with partitions, for batteries. Each, $1.50 3347.-Trellis Top, for furnace, of gauze wire. " 1.50 3348.-Triangles, of glass. ".30 3349.-Ditto, Plattner's Blow-pipe..25 3350.-Ditto, ditto, porcelain. ".50 3351.-Ditto, ditto, wire. Per doz.,.60 Trimming Hammers. See Hammers. 3352.-Tripods, of galvanized iron, for gas burner. " $7.00 3353.-Ditto, ditto, brass, for spirit lamp. " 9.00 3354.-Ditto, of wrought iron, with two concentric rings. Ea., 1.00 3355.-Ditto, ditto, ditto, with 7 concentric rings. " 2.00 3356.-Ditto, of iron, triangular shape, sets of three. 1.75 3357.-Ditto, ditto, singly. Smallest,.50 Medium,.60 Largest,.75 each. Tubes, Arsenic, Chloride of Calcium, Combustion, Condensing, Communicative, Gas, etc. See respective heads. OF CHEMICAL AND PHYSICAL APPARATUS. 173 Tubes, delivery. Per doz., $1.50 Ditto, drying. Each,.50 Ditto, filling. ".50 Ditto, julep. Per doz.,.50 Ditto, for Liebig's condenser, ordinary size. Each, $1.00 Ditto, ditto, ditto, 6 ft. " 3.00 3358.-Ditto, for musical sounds. c".50 3359.-Ditto, -containing phosphorescent substances, in cases, $3.00 and in frames, $5.00. 3360.-Ditto, sealing, for receiving substances, the neck being afterwards closed by lamp flame. Per doz., $2.00 3361. —Ditto, spiral electric. Each, 3.00 3362.-Ditto, T large, of thermometer tubing. " 1.00 3363 3364 3365 3366 3363.-Ditto, 3 way, small, made of ordinary glass. Each,.25 3364.-Ditto, U, 6 9 10 in..25.50.60 each. 3365.-Ditto, ditto, 3 bulbs, small. *".40 3366.-Ditto, ditto, ditto, large. ".50 3367.-Ditto, ditto, ditto, wide, with large bulbs. ".75 3368.-Ditto, ditto, Bohemian, with draining tube in the middle, long. Each,.75 3369.-Ditto, ditto, with stop-cock. ".75 3370.-Ditto, for vaccine. Per hundred, $5.00 3371.-Ditto, Specimen, perfectly round bottom, extra heavy glass, to bear corking. 1JxJ 2xj 2x% 2x~ 2s- 2x in..20.25.30,35.40.43 per doz. 2j x 3xj 4xi 4x 4x 4~ x I in..45.48.50.55.60.65 per doz. 5xj 5sx- 6x1 in..75.80 $1.00 per doz. 174 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3367 3371 3372 3373 3a$8a 3372. —Tubes, Vogel's modification of Woulis apparatus, a substitution for Woulff's bottles by insertion into the neclk of an ordinary bottle. $1.00 3373.-Ditto, ditto, with funnel tube. 1.25 3374. —Tubing, barometer. Per lb. o75 3375.-Ditto, capillary, 3 ft. length. Each,.06 3376.-Ditto, colored. Per lb. $2.o0 00000 OO00oo 0ooo 9 i j k I m nop 3377.-Ditto, soft Bohemian, French and German. Per lb.,.75 3378.-Ditto, ordinary soft glass, according to quantity. Per lb.,.50 to.60 3379.-Ditto, single up to i in. bore. Each,.10 3380.-Ditto, of hard glass, from pure silicates, entirely free from lead, manufactured expressly for making combustions in organic analysis; of genuine Bohemian glass and no other, i to I in. Per lb., $1.00 3381.-Ditto, hard, free from lead, j to I in. " 1.25 3382.-Ditto, glass, white, of large bore. " 1.50 LI TST OF Numbers, Diameters and Yards Per Pound OF DIFFERENT SIZES OF C OPP ER WIRE, ACCORDING TO THE BIRMINGHAM WIRE GAUGE. Dialieter Yards Diameter Yards Diameter Yalrds No.. In per IBW.G. in per B. W. in per B.W.G. Inches. Pound. Inches. Pound. Inches. Pound. _-'_ _.I - 10.134. 6 007 19.042 62 98 28 014 569.5 1i1 -120 7 646 fi 20 035 89.86 29.013 651 -3 12.109 9.705 /21.03.2 1t08.5 30.012 771.6 13.09.9 13 12 2).028 141 7 31.010 1111 14.083, 17.36 23.025 176.1 32.009 13 1 15.07' 22.67 24.02'2 2;19.6 33.008 17 T6 16.0f65 2!i.29 25.0-20 277'- 34.007 2-267 17 0.058 33 03 26.018 342.9 35.005 44,44 18.049 45.83 27.016 434- 36.004 6944 No. NEW YORK, January, 1873. 176 E. B. BENJAMIfIN'S DESCRIPTIVE CATALOGUE 3383.-Tubing, Earthen, 1 inch bore. Each, $1.50 3384. —Ditto, Porcelain. ~ in. bore, 1~ in. bore, 30 in. length..75 $1.50 each. 3385 3394 3396 3400 3385.-Ditto, ditto, with flanged ends. 1 2 in. $1.00 1.50 2.25. 3386.-Ditto, Rubber, black or unvulcanized. ii6 ~a in..20.25.30 per foot. 3387.-Ditto, ditto, vulcanized, lengths cut to order. Q t 8 ~ i in..10.12.1.20.22.30.35 per foot. 3388.-Ditto, ditto, ditto, full pieces. ~,' - i~- i gi in..08.10.1 A1.29.25 per foot. 3389.-Ditto, ditto, ditto, heavy, i in. 25,.it in. 30 per foot. 3390.-Ditto, rubber, extra heavy, barometer, to stand a heavy pressure, assorted sizes. Per lb. $2.00 3391.-Ditto, thermometer. c.75 3392.-Turmneric Paper. Per sheet,.05 Twaddle's Hydrometer. See Hydrometer. 3393.-Twine Boxes. Each, $1.00 3394-.-Tourmaline Pincers. Each, $9, 10, 11, 12 3395.-Twine, small, colored. Per lb. $1.50 3396.-Upcast and Downcast Draught, model of, in glass, ~.~~~~ ]~L~~~Each, $5.00 3397. —lrinals, male, of glass. ".25 3398.-Ditto, t" of rubber..50 OF CHEMICAL AND PHYSICAL APPARATUS. 177 3399.-Urinals, female, of glass, Each,.25 Other articles under this letter. See their respective headings in the Catalogue under other titles. 3400. —Vases, large glass, with flaring top, capacity 2 gallons, for holding sponges, etc. Each, $2.50 3401. —apor Index, Lippincott's. 3402.-Vases, earthen, French, flat bottom, for silver and other solutions held in acid, 10 galls., Each, $12.00 3403. —Y Tubes, for condensing limb, 7 ins. long and - in. bore. Eaclh,.50 3404. —Vials, Homeopathic, 1 drachm.15, 2 drachms.20 per doz. 3405.-Ditto, Sample, of fine white French glass, for the preservation of samples; 4 oz. capacity. Per doz. $4.50 Vogel's Gas Bottle. See Woulff's Tubes. 3406.-Washing Bottles, Faraday's. 8 oz. pts. qts..60.75.90 each. 3407.-W-W1atch G*lasses, French, used in pairs, or singly as covers to beakers. 1 1~ 1~ 2 24 2~j 3 in..45.50.55.7 5 $1.25 1.50 2.00 per doz. 3408.-Ditto, Bohemian, ditto, ditto, ditto, ditto. 21 3 31 4 4- 5 in. $1.65 2.25 2.75 3.25 3.75 4.50 per doz. Ditto, ditto, holders. See Holders. 3409.-Watch Springs, for burning in oxygen. Per doz..30 3410. —Water Baths, copper, with 3 concentric rings and-spun bottom. 5 o5 6 in. $2.00 2.50 3.00 each. 3411.-Ditto, ditto, ditto, nickleized. 5 5- 6 in. $2.50 3.00 3.50 each. 3412. —Ditto, copper, of extra large size, $4.50to $10.00. 3413.-Ditto, porcelain. U 4 6 8 oz. 3406 3415 $1.25 1.50 2.00 each. 3414. —Ditto, ditto, with handle on side. Each, $1.00 3415.-Water Hammer..75 3416.-Ditto, ditto, singing. 1.00 178 I. B. BENJAMIN'S DESCRIPTIVE CATALOGUE H. TROEMNER'S STANDARD WEIGHTS. Weights, either gramme or grain, in French polished boxes lined with velvet, every piece fitted separately. Brass weights lacquered; the fraction of the gramme are platinum, except below 20 milligramme, which are made of aluminum. Adjusted to the utmost accuracy. Special weights furnished to order. 3417. —Weights of Precision, in fine velvet lined polished block, 1 platinum gramme to 1 milli. $6.00 3418.-Ditto. 1 " i" to mili. 7.00 3419.-Ditto. 10 gramme to I mili. 7.50 3420.-Ditto. 10 " -lu mili. 8.50 3421.-Ditto. 50 " 1 mill., 3 riders. 10.50 3422.-Ditto. 100 " " " 12.00 3423.-Ditto. 100 " Ad milli., 3 riders. 13.C0 3424.-Ditto. 200 " 1 mili. 16.00 3425.-Ditto. Gold Assay Weights. 7.00 All riders weigh 10 mili., unless otherwise ordered. 3426.-Assay Ton Weights, 4 A. T. to ioy A. T. $6.50 (The assay ton weights have been introduced by Dr. C. F. Chandler, of the School of Mines, Columbia College, New York, where they are in use for convenience in the assay of ores. The weight denominated by Dr. Chandler "One A. T." equals 29,1666 grammes, and contains, consequently, as many milligrammes as there are troy ounces in a ton avoirdupois of 2,000 lbs. Therefore, if One A. T. of ore assays 1 milligramme, the ton contains, of course, 1 ounce troy.) 3427. —Weights, 10 platinum grains to o grain. $5.00 3428.-Ditto. 10 " " T-O grain. 6.00 3429.-Ditto. 10 " " o0v grain. v.00 3430. —Ditto. 100 grains to TOW grain. 7.00 OF CHEMICAL AND PHYSICAL APPARATUS. 179 3431.-Weights, 1000 grains to & grain, 3 riders. $10.00 3432. —Ditto. 1000 grains to T- grain, 3 riders. 11.00 3433.-Ditto. 1000 grains to Two grain, 3 riders. 12.00 3434.-Ditto. 4 oz. troy to -~A grain. 8.00 3435. —Gramme Weights, in mahogany block, 500 grammes to 1 gram. $8.00 3436.-Ditto. 500 grammes to 1 centi. 12.00 3437.-Ditto. 500 grammes to 1 mill 14.00 3438.-Ditto. 1 kilo. to 1 gram. 12.00 3439.-Ditto. 1 kilo. to 1 centi. 16.00 3440.-Ditto. 1 kilo. to 1 mili. 18.00 3441.-Ditto. 1 oz. troy to i grain. 4.00 3442.-Ditto. 2 " " " 5.00 3443.- Ditto. 5 " " 7.50 3444.- Ditto. 10 " " " 10.00 3445.-Weights, sets of fractions of millegrammes, accurately balanced. Each, $2.50 3446.-Ditto, French, brass, ~ to -fa oz. $1.50 3447.-Ditto, ditto, mahogany boxes, 50 grammes down. $3.00 3448.-Ditto, ditto, 100 grammes down. 4.00 3449.-Ditto, ditto, 300 cc" " 5.00 3448 3450.-Ditto, ditto, 1000 " " $7.50 3451.-Ditto, ditto, in polished wood boxes, 1 lb. to ~ grain down. 3452.-Ditto, subdivision of grammes..50 3453.-Ditto, from 1 lb. avoirdupois, down to i oz. $4.50 3454.-Wire, brass, for making scratch brushes, etc.; No. 20 up to No. 40. Per lb. $3.00 to 5.00 3455.-Ditto, copper, ls- in. Per lb. $2.00 3456. —Ditto, silk wound. " 3.00 3457.-Ditto, copper, silk wound, for making Ruhmkorff's coil and other electrical apparatus. Per gramme,.12 3458.-Ditto, piano, for blow-pipe experiments. Per lb. $1.50 3459.-Ditto, magnesium. Per foot,.06 3460.-Ditto, gauze of copper, according to fineness. Per sq. ft.,.50 to $1.00 3461.-Ditto, brass ".40 to.90 180 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. 3462. —Wire, iron, price according to fineness. 3463.-Woulff's Apparatus, for washing Gases. 8 oz. 16 oz. qts. $5.50 6.60 8.00 3463 3464.-Ditto, with lamp. 8 oz. 16 oz. qts. $10.00 12.00 14.00 Wurtz' Apparatus, for Fractional Distillation. See Distillation. 3465-Woulff's Apparatus, with gas bottles instead of flasks, and dispensing with lamp and stand. $4.00 to 6.50 3466. —Zinc, Filings. Per lb..25 3467.-Ditto, Sheet. ".20 3468.-Zincs, for bichromate batteries, cast..25 to $3.00 3469.-Ditto, for Bunsen's batteries, heavy rolled. $1.50 to 3.00 3470.-Ditto, for Daniells'..75 to 1.50 3471.-Ditto, for Grove's or Smee's, cast. Per lb.,.18 No. 10 BARCLAY STREET, NEW YORK, November 1, 1876. Thanking my many kind patrons for their generous support the past years, I beg respectfully to present this list to their careful perusal and attention. The long established and celebrated house of Dr. Trommsdorff having granted me extra facilities on their pure chemical products, I beg permission to present to my kind patrons the following low prices for rare and pure chemicals, prefacing the same with the observation, that as I have no trade for drugs, buyers will perceive that I have no temptations to substitute ordinary chemicals for pure; therefore, the accompanying list is intended for only the best article of its kind of the sort named. There is also added to the list of chemicals, some few new styles of Apparatus which are not in my catalogue, and I beg to add that I am also making material reduction in such American made articles as the lower prices of labor at this time warrant. For example: Combustion Furnaces, 25 Burners, quoted formerly at $50.00, I now sell at $40.00; ordinary Bunsen Burners, at $7.00, net, the dozen, &c., &c. Buyers will kindly compare the German and Bohemian glassware as to quality, and as there is about 50 per cent. difference in cost abroad, any ordinary offer of discount is not likely to cover the difference in quality, any more than such discount will cover the difference between Semi and Royal Porcelain. By comparing, for example, the Bohemian Funnels No. 2318 with the German Funnels No. 2322, an approximation of the difference may be arrived at. The genuine Bohemian Flasks and other glassware may be distinguished from the German, French and American by a delicate greenish tint across the tops of the vessels; other glass, Fren(ch especially, being nearly white, or straw color tint. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. Again, the Beakers ordinarily quoted at 1/3 are identical in size with my 0/2, and those called 1/5 are identical with my 0/4, &c. -my estimate of capacities allowing for boiling. The sizes named by me are the same as filled in Eunrope, and I am not responsible for sizes made up here by any other dealer. A comparison will show that my prices are, and have been very low, and so of other goods. RECOMMENDATIONS. Those of my patrons who have always taken an active interest in my success, will be pleased to learn that the Prize Medal has been awarded to me, alone, at the International Exhibition at Philadelphia, over all competitors in the United States, " for Pure and Rare Chemicals and Chemical Apparatus of excellent design and finish," by the Judges in the group comprising this class of goods. The Judges are: Charles A. Joy, Ph. D., Professor of General Chemistry, Columbia College, N. Y.; F. A. Genth, A. M., M. D., Professor of Analytical Chemistry, University of Pennsylvania, Philadelphia; Dr. J. Lawrence Smith, the celebrated Chemist of Louisville, Ky.; Professor C. F. Chandler, Ph. D., M. D., LL. D., Professor of Analytical and Applied Chemistry, School of Mines, Pharmacy, &c.; Pi ofessor J. W. Mallett, Ph. D., University of Virginia, and the following eminent gentlemen from Europe, viz.: Dr. William Odling, F. R. S., and Professor of Chemistry, Oxford University, of Great Britain, chief among English chemists; R. Van Wagner, of Germany, editor of the Jahresbericht der Technologischen Chemie; J. F. Kuhlman fils, of Lisle, France, probably the largest manufacturer of chemicals in the world; Prosper de Wilde, Belgium, and Emanuel Paterno, Italy, all of whom are justly celebrated in the scientific world. The award of which these renowned gentlemen have deemed my goods worthy, will, I trust, stimulate my countrymen to encourage all efforts to place this establishment on a par with any other abroad. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. PLATINUM. The increasing demand for the " non-blistering" Platinum, of which my establishment is the depot, has enabled the company which I represent to grant me extra facilities in this line of goods, and I would respectfully request a comparison of the quality of these goods with those sold elsewhere. FRICTIONAL ELECTRICAL MACHINES. I have nearly perfected arrangements for bringing forward a new Patent Electric Maohine, yielding long sparks, and adapted to the means of our academies and schools. The price will be about twenty-five dollars each. The larger electric machines now made here are materially reduced in price, in consequence of decline in cost of making. BALANCES AND WEIGHTS. My patrons will receive herewith a list of Balances and Weights published by Henry Trceemner, which they will please substitute for those of Becker & Sons, published in my Catalogue of'12. Mr. H. Trcemner having appointed me a special agent here for his Analytical Balances and Weights, all sold by me are guaranteed fully equal to any sold in this country. CHLORIDE OF CALCIUM TUBES. Two Bulb with Interior Tube...................... each, $0 50 This is a new form of Chloride of Calcium Tube, devised by Prof. Mixter, of Sheffield Scientific School, New Haven, and in use at that Institution. It is an improvement upon the old y,) form of drying tube, the difference consisting in the addition of a small interior tube, reaching nearly across the smaller of the two bulbs. The advantage which it has over the old form can be seen at a glance, although no one can fully appreciate its usefulness without having used both styles. When in use, the gas is caused to flow from the smaller end to the larger one, the large bulb and tube being filled with the drying material, chloride of calcium. During the passage of the hygrometric gas, the aqueous vapors condense, for the most part, in the smaller bulb, only L a comparatively small amount being carried over into the No.3678. chloride of calcium. For this reason the latter may be used over again, and the operation repeated several times without reliling the tube. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. The part which the small interior tube plays is, to keep the water which collects in the small bulb from running into the large one, a disadvantage to which the old form is subject. Furthermore, the tube may be used in an inclined or even vertical position without inconvenience, and still do excellent service. The use of cotton may be dispensed with in this form of apparatus, as the very small bore of the interior tube will, if care be taken to select lumps of chloride of calcium (instead of the same powdered), prevent them from falling through into the small bulb. RADIOMETERS. Crookes'....................................each $S 50 to $9 00 The Radiometer, invented by Wm. Crookes, Esq.,;', > F. R. S., of England, and manufactured in its most elegant form by Dr. Geissler, of Germany, the manufacturer of the world renowned " Geissler Tubes," (who has appointed me his agent for their sale), is shown in the accompanying figure. It consists in the main of four radial arms of very thin metal, carrying at their extremities diamond-shaped pieces of a peculiarly light substance, the character of which varies somewhat in each manufactory. The system - -~~ is delicately poised at its centre upon a needle fasNo. 3672. tened into the extremity of an upright rod of glass, and kept from falling from the same by a vertical glass tube, whose lower extremity projects over the cap of glass which rests upon the needle, and upon which the arms are fastened. The whole is enclosed in a shell of glass, pleasing in design and strong enough to resist the pressure of the external atmosphere (for the apparatus is exhausted as perfectly as can be done by a sprengel pump, to obviate as much as possible the resistance which would be caused by the air). Upon placing the apparatus in the sunlight, or allowing the light from a magnesium or electric light to fall upon it, the radial arms begin to revolve, and continue to move as long as the light rays last, the velocity of revolution increasing or decreasing in proportion to the intensity of the light. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. PROF. RICHARDS' ASPIRATOR. A substitute for the Bunsen Pump...................each, $1 50 C represents the Aspirator invented by Prof. Robert H. Richards, of the Mass. Institute of Technology, Boston,, and used for the purpose of quick filtration. It is the result of a number of careful experiments made by the above gentleman. and for simplicity of design and the ease with which it can be manipulated, together with its efficacy, it recommends itself to all who wish a good effective filterpump, without being compelled to pay the high price which a more elaborate piece of apparatus would obviously command. In order to use this pump, all that is necessary to do is to connect the tube at the top with the faucet of an ordinary hydrant, by means of a length of rubber tubing, whilst the filtering flask carrying the funnel is attached to the tube at the left of the pump. Upon allowing the water to flow through the latter, the air in the cylindrical No. 3673. part surrounding the small interior tube is caught, as it were, by the water, and drawn into the lower tube, thus producing a rarefaction of the air in the tube at the left and in the filtering flask. The result is a flow of water through the funnel and its contained precipitate, and a thorough washing of the latter. By continuing the working of the pump after washing the precipitate, the latter may be so completely dried as to be ready for ignition in a crucible, and the pump is also cleared well at the same time. As a certain ratio exists between the size of the orifice of the interior tube, the diameter of the exterior tube, and the force of water issuing from the hydrant, it will be necessary for parties ordering the apparatus of me to state the approximate fall and force of water at their command, that the pump may be made to correspond. FUNNEL FOR RAPID FILTRATION. Casamajor's modification of Carmichael's process.......each, $0 50 This is represented at D as a small inverted funnel. The original funnel, as conceived by Carmichael, was made entirely of glass, with a bottom perforated with fine holes, these holes being produced, whilst the glass was in a state of semi-fluidity, by means of a red-hot No 3674. needle. This being a very uncertain, if not an impossible undertaking, the idea occurred by Mr. P. Casamajor, of Williamsburgh, that by making use of a funnel provided with a movable bottom or diaphragm of platinum the end might be attained. This funnel was tried and found to answer all that was required of it, and it is now offered to the chemist as a cheap, E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. efficient and very convenient apparatus for rapid filtration. It is made, as shown in the cut, of glass, with its stem bent at a right angle, the part shaped like a bell being provided with a circular disc of platinum perforated with fine holes. (The disc is not shown in the diagram.) The modus operandi is as follows: The disc, whose diameter is about 20mm., is laid upon a piece of filter paper (Swedish being generally preferred), and a circle of 25mm. is cut out of the latter, thus leaving a small margin all around the edge of the platinum. The latter is then separated from the paper and laid upon the funnel, completely covering the large opening. The paper is then moistened and laid over the platinum, covering it and extending over the edge all around, where it is brought in contact with the glass. The funnel is then connected by means of a rubber tube attached to its stem with the flask, which is in turn put in communication with the filter-pump. The mouth of the funnel, which is quite small, is then placed in the platinum or porcelain vessel in which the precipitate is to be ignited, and the liquid containing the latter is poured into the vessel. Upon starting the pump the filtration begins, and is continued as long as necessary, with a small disc of washing, etc., being a precipitate in the dish the final result, after paper upon it, the ash of which, after ignition, may be disregarded. The upper edge of the funnel holds a little of the precipitate which may be weighed with the funnel itself. IMPROVED FORM OF LIEBIG'S POTASH BULB. By Alvergniat Freres, Paris...each, $1 00 This piece of apparatus is shown at E, and differs from what has alwayvs been known as Liebig's Potash Bulb, in having the lower bulbs connected by curved instead of straight tubes; at the same time the circular bulbs at the side are replaced by pear-shaped ones, the latter as well as the extra No. 3675. length of Tubing giving increased contact of gas and liquid, and thereby increased absorption. Again, the extension of the tubes (at the lower part) to one side, forms a base of support, so that the apparatus may be placed upon the pan of the balance and readily weighed, without the trouble of attaching wires to the upper part, and hanging it to the beam. These bulbs. are used by many at present in preference to the older form, and bid fair, in time, to supersede them; for this is an age of progress as well in the chemical laboratory as anywhere else, and it is but natural for the analyst to select for his work those pieces of apparatus which can be most conveniently used, while at the same time performing their work satisfactorily. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. FILTER QUICK, CASAMAJOR'S. Each, $0 75. This Filter has been fully described in the August, 1875, number of the American Chemist, and is found to be very useful, not only in filtration, but also in thoroughly drying the precipitates afterwards. No. 3676. CONSTANT WATER BATH LEVEL. Each, $7 50 The cut annexed represents a very useful copper apparatus, contrived by A^ Dr. J. Lawrence Smith, of Louisville, to maintain a continued level of water { in a series of water baths. The outer vessel has an arm which sustains a glass pipette drawn at the lower end (C), and held in position by small pieces of caoutchouc tubing (A. & B). This pipette passes through the metallic swimmer (E) placed within the above named vessel. Under the bottom of the swimmer is an elbow supporting a rubber cushion (F), which-when the swimmer is buoyed above the desired level-presses against the drawn point AfIIII IIIE~ of the pipette, and stops the flow of water. The top of the glass pipette (B) is united to the water supply, and the No. 3677. discharge tube (D) projecting from the foot of the outer vessel, is connected with the water baths. Bunsen's Improved Water Bath for Constant Level, Consists of the usual copper bath with concentric rings, with the addition of a connecting tube running from the bottom and joined to a simple arrangement by which the level of the water in bath is maintained. The inner tube (A) passes through the bottom of the attachment (C), being held in place by a rubber tube, so that it may be lowered or raised to answer to the height of water required in the water bath. (B) is an outer tube through which the water is supplied from the hydrant, the overNo. 3679. plus passing out through the tube (A). This supplies a want long experienced by chemists, for in using the old form, in case the analyst is called from his work, there is a risk of the water being evaporated from the bath during his absence. A tripod may be attached to the apparatus to support it. E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. Buyers cannot be too much impressed with the absolute advantage of purchasing direct from a responsible dealer in chemical apparatus, who understands the uses of such goods, and has a reputation at stake in his special line; who has the goods in stock adapted to the purposes advertised, and has no occasion to provide any makeshift of supposed resemblances to catalogue illustrations. Very frequently I receive advices from chemists, stating that they have handed orders for apparatus, chemicals, etc., selected from my catalogue, to dealers near them, which goods were never bought from me by their agents, resulting in furnishing the chemist with poor apparatus, and reflecting unjustly on the character of my stock. Only by buying direct can the chemist be sure that his entire order comes from a dealer in chemical apparatus. Every intelligent chemist knows that the labor of preparing an analysis is liable to be lost from the use of imperfect or badly annealed vessels, and will therefore avoid investing in poor articles because they may happen to be cheap. E. B. BENJAMIN. CHEMICALS AND REAGENTS. THis List comprises the majority of Chemicals I keep, though there are a number of strictly commercial articles that usually rank under the head of Chemicals, which are omitted, but which I have the fullest facilities for shipping at the lowest market rates. The prices given are for usual quantities. If large amounts of -any article herein priced are desired, I should be pleased to give the benefit of the lowest market quotations, according to the market values at the time. I have frequently procured Crude Stock Chemicals, Drugs, and other articles for class illustrations in Organic and Applied Chemistry, for my patrons at a distance, and will take pleasure in serving them in this manner in the future, charging only a small per centage for my time and trouble. Standard Test Solutions, according to Fresenius and other authorities, carefully prepared to order at moderate rates. Great attention is paid to neatness, cleanliness and accuracy in dispensing reagents. Complete collections of the elements made and arranged on demand; also suits of the principal spectroscopic salts, neatly put up in glass stoppered vials, for either class illustrations or Laboratory purposes. E. B. BENJAMIN. 182 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE ABBREVIATED TERMS AND TRADE MARKS, USED IN THIS WORK. Sol.=Solution; Precc.=Precipitated; lb.=-pound; oz.= —ounce; dr.=drachm; gr.==grain; grm.=gramme; Mg.=Milligramme; C. C.= —Centimeter; pt.=-pint; qt.==quart; gal. —gallon; Opt.=best, next to pure; pure-=next to C. P.; C. P.=Chemicallypure; U. S. P. =United States Pharmacopaeia; Puriss=extra C. P.; T=Trommsdorff's; M.=Merck's; Spec.==Specimen; Corn'l=Commercial; corn. = —common; Sub.= —Sublimed; F. F.=-Forte Fortisimo, or very strong; F. F. F. F.= —Double; Conc. —Concentrated; Fren. or F. T. —Fresenius' Test; Sp. Grav.=-Specific Gravity; Am.=American. COMPARATIVE TABLE OF WEIGHTS. 1 pound Avoirdupois, 7000 grains. i ounce " 4371 " 1 drachm, - 54.69" 28.35 grammes, - 1 ounce Avoirdupois. 31.10 " 1 " Troy. 453.60 " - 1 ppund Avoirdupois. 1 " - 15.431 grains. 100 " - 3.53 ounces Avoirdupois. 100 " - 3.214 " Troy. 1000 " -- 1 Kilo I Kilo., 2 —1- 2.20 lbs. Avoirdupois. PRICE LIST. A. Acetone, C. P.................................. Per oz., $.30 Acid, Acetic, U. S. P., Sp. Gray., 1047............... Per lb.,.30 Ditto, strictly C. P., Sp. Gray., 1047 U. S. P., same quality as Batfoy's best Eng...............Per lb.,.50 Ditto, Acetic, Glacial............Per lb., $1.25, Per oz.,.15 - Antimonic, C. P............................ ".15 " Arsenic......................... Per lb., $1.50 ".15 " Arsenious, C. P................. " 1.00 ".10 " Ditto, Lump Coml., very com.... ".20' Boracic, C. P. fused, pow'd....................15 " Benzoic, True........................... ".25 " Ditto, Com. Artificial........................ ".15 " Butyric, Puriss.............................. ",40 Camphoric, True........................... per oz., 2.50 " Chloric................................. Carbazotic, Puriss.............. 1.00 " Capronic.............. 3.50 Carbolic, White Cryst........... Per lb., $1.50 Per oz.,.15 " Ditto, Com'l............ " 1.00 ".10 Chromic, C. P., Cryst....................... ".30 Cresylic, C. P., Cryst........................ " 0 Citric, C. P., Cryst...Puriss.......Per lb., $2.50 Per oz.,.20 F" ormic, C. P................................ 2.5 " Fluoric. See HydrofluoTic, in 1 oz. and 8 oz. bottles. Gallic, Puriss... ".40 Gallotannic..................................65 " Hippuric................................... " 3.00 H" ydriodic........... "1.25 " Hydrobromic........................ ".60 184 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Acid, Hydrocyanic, U. S. P........................ Per oz., $.10 " Hydrofluoric, in gutta percha bottles, with bottle. Per lb., 2.25 " Hydrofluosilicic, C. P........................ " 1.00 cc Hydrochloric. See Muriatic. "c Hypophosphorous, Sol.......................Per oz.,.40 " Iodic, C. P................................. I, 2.00 " Lactic, C. P., Cone............................ 50 M" alic...................................... " 1.50 M" argaric, C. P............................. Per dr.,.40 ". Meconic..................................Per oz., 8.00 " ucic...............1.00 " Molybdic, C. P., T...................... Per oz.,.50 " Muriatic, C. P., in 1 and 6 lb. bottles.. Per lb.,.27 " Ditto, Com'l.l.....................06 Ditto, special price for Carboy. Nitric, C. P., 1 and 7 lb. bottles.. ".35 c' Ditto, Com'l. Per carboy, special prices......15 Ditto, Fuming Red. C. P. (rare quality)..... " 2.25 " Ditto, ditto, ditto.' 1.50 -" Nitrohydrochloric, Pure......................50 is Oxalic, C. P. T., according to quality. " 1.25. Ditto, C. P., Am., very superior..".50 " Ditto, Coml......................'.25 " Oleic, C. P................ Per oz., 1.50 " Phosphoric, U. S. P.......................... ".05 Ditto, Glacial, C. P- T....20 Phosphorous, C. P., Sol.......................10 Phenic, Crystals, Pure......................15 " Phosphomobybdic, Sol....................... " 1.00 " Phosphowolframic, Sol...................... cc.80 " Pyrogallic, Leviss, C. P. T........... c"'80 " Ditto, Alb. Sub. Puriss........................50 Pyroligneous, Refined....................... Per lb., 1.00 " Prussic, "Scheeles.........................Per oz.,.2l 6c Salicylic.................................. ".50 " Pictric, True............................... Per oz.,.40 " Silicic, Pure Native, Pow'd.................. Per lb.,.25 " Ditto, C. P., Precc., T....................... Per oz.,.25 " Succinic, Pure Alb. Cryst................... " 40 OF CHEMICAL AND PHYSICAL APPARATUS. 185 Acid, Stearic, Puriss., for delicate analysis.........Per dr., $.60 Ditto, Com................................... Per oz.,.10 " Suberic..................., Per dr., 1.75 "Suberic...Per dr., 1.75 " Sulphuric, C. P., 1 and 9 lb. bottles...!..,....Per lb.,.40 Ditto, Com'l..................................06 Ditto, Nord, in cans and bottles.".35 Ditto, per Carboy, special price. Tannic, C. P., Leviss.........................Per oz.,.30 " Ditto, Pure.............15 "Tartaric, Pure, Cryst..........................Per lb.,.75 Ditto, C. P., for accurate analysis...... 1.75 Ditto, Powdered, Corn................60 Titannic Per dr.,.40 "Uric, C. P., Cryst..............................Per oz., 1.25 Uranic, Comr.n........................... Per oz., 1.25 Valerianic....................Per oz.,'.60: Vanadinic, C. P........................... Per dr. 8.00 " Wolframic. See Tungstic Acid.................Per oz.,.40 Alcohol, 95pr.c.; special price large quantity... Per gal. 3.00 " Absolute............. Per lb..80 " Ammoniated............................ " 1.00' Amylic.................. 2.50 (L" Methylic, nearly inodorous and free from Amylic Alcohol. This will be found to be an excellent and cheap substitute for Wine Alcohol in all heating operations. It possesses decidedly greater heating power than Wine Alcohol, and is recommended to the attention of all chemists and experimenters living where gas cannot be procured or used. Per gal., $1.65, by the keg or cask............................... Per gal. 1.40 Albumen, from blood............................. Per oz..25 " " milk.............................50 " eggs........................... ".20 Aldehyde....................Per oz.,.40 Aluminlum,Mett, foil...............*............ " 2.2 " wire............ 3 Chloride, C. P...C. 186 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Aluminium, Fluoride. Native; see Minerals........ Per lb.,.50 Alumina, Precc., Puriss., hydrated................ Per lb., 2.00 " Acetate......................Per oz..30 Is Bromide...............................Per oz.,.50 Sulphate, Pure Cryst. Leviss............Per oz.,.20 "' " and Ammonia, Puriss.........Per lb., 1.00 a' " c "; " " Crude, Com.... ".10 c" Ammonia, Cryst. and Pulv........... ".25 Alum; Potassa C. P. T......................... ".25 " Iron..................................... Per oz.,.10 " Chrome, Cryst., Pure...................... ".10 " Ammonia, Ferric........................... Per lb., 1.00 Amber, small pieces..............................Per oz.,.20 Ammonia, Aqua, Conc., U. S. P., 4j lb. bottles...... Per lb.,.35 c" Liquor. F. F. F., 26j per cent. of gas......Per lb.,.35 Per oz.,.05 It" Spirits, U. S. P Per lb.,.20 "c Acetate, Cryst., C. P.Per oz.,.50 "r Ditto, Sol., C. P....................... c.25 c" Arseniate............................. ".30 c" Benzoate, C. P........................ ".90 ~" Bichromate............................. ".40'" Bromide............................... ".35 Carbonate, pure........................ Per lb.,.75 Ditto, Com............................ ".60 Citrate and Citrate Iron................ Per oz.,.25 Citrate................................ Per lb., 2.50 (" Gallate, pure.......................... Per oz., 1.50 Hydrosulphide, Liq.................. Per lb.,.75 Hydrofluorate, Cryst., C. P..............Per oz., 1.50 " Hypophosphite.......................... ".30 -" Molybdate, C. P., Cryst................ ".75 Monocarbonate, C. P...................Per lb., 1.50 C" Chloride, C. P..........................50 "C Ditto, Com'l........................... u' Nitrate, Cryst., C. P.......Per lb., $1.00, Per oz.,.10 cc" fused Am., Pure...............Per lb.,.40'a Oxalate, C. P., Cryst....... Per lb., $1.80, Per oz.,.20 C'".Phosphate, Cryst., Pure..........,. ".20 OF CHEMICAL AND PHYSICAL APPARATUS. 187 Ammonia, Succinate, T., Cryst.................... Per oz., $.80 Sulphate, Com........................ Per lb.,.12 " " C. P.......................70 e" Sulphocyanide..........Per lb., $3.00, Per oz.,.25 i " Urate, C. P............................80 " Valerianate..............80 " Vanandate............................ Per gr.,.20 Ainygdalin......................................Per dr. 2.75 Amyle, Acetate..................................Per oz.,.50 " Butvrate................................ c".50 " _Formate..................................50 c" Nitrite, Pure..............................60 Valerianate............................. ".75 Hydrochlorate............................. ".75 A malgam, Mercury.............................. Per box,.75 " Fusible...............................50 Antimony, Chloride, Sol................Per lb.,.40 te" " Cryst., C. P..................Per oz.,.40 (" Iodide, Cryst., C. P.....................90 Proto Oxide, white, C. P.............. ".15 " Golden Sulphide.......................Per lb.,.75 — " Black " Levigated. Per lb.,.35, Per oz.,.05 Ditto, Native..........................Per lb.,.20 " Tartrate, Cryst., Pure." 2.00 "' Ditto, and Tart Potassa." 1.25 Mett, Best...... ".20 Aniline, Pure, Liq............................... " 2.50 " Sulphate, C. P........................... Per oz.,.75 " Red................................. " 90 " Scarlet................................. " " Blue................................. " " Violet................................. " " Pink..................................... " " Green.................................... " " Black................................... " " Yellow................................. " Orange................................... " Purple.................................... Animal Charcoal, Gran., Best.................... Per lb.,.10 188 E. B. BENJAMIN'S. DESCRIPTIVE CATALOGUE Animal Charcoal, Corn.....................Per lb., $.08 " "( Pulv. Fine.................... ".10 Arsenic, Native Mett.............................. ".50 (" Pulverized............................. ".25 e" Bromide................................ Per oz., 1.25 Iodide..................................75 c" Chloride...............................'..80 "a Oxide Proto. See Acids. " Per " Sulphide Per............................Per lb.,.20 " " Proto........................ ".25 Argols, Crude.................................".25 " Refined...................".........30 Asparagln, C. P..............................Per dr.,.30 Asphaltum, Opt................................ Per lb..15 Asbestos, Long Fibre......................... Per oz.,.15.." Short "........................... Per lb.,.60 Atropia, Pure................................... Per gr.,.06 " Sulphate............................... ".06 B. Barium, Chloride, Com................. Per lb.,.20, Per oz.,.05 " " ( C. P................ " 230, ".05 cc c" Puriss., T....................... Per lb..40 " Fluoride............................... Per oz., 1.00 " Mett., Spec...........................Per Gram. 4.50 " Iodide, C. P............................ Per oz., 1.00 Hyperoxide, C. P., T..................... ".45 " Proto-oxide, "......................30 " Sulphide................................10 Baryta, Acetate................................. ".20 " Caustic, Cryst., C. P.......... Per lb., $1.00, ".10 " Carb., Native............................ Per lb..25 " Precc., C. P., T.....................80 " Chlorate, C. P., T........................ Per oz.,.40 Nitrate, Cryst., C' P......................Per lb.,.50 " " Com'l........................... ".30 Sulphate................................." 75 sc " " Opt., Pure.......................Per oz.,.1.0 OF CHEMICAL AND PHYSICAL APPARATUS.. 189 Baryta, Water, per fluid oz........................ Per oz., $.05 Beeswax, White...............................10 *-" (C Yellow...............................Per lb.,.75 Berberine, Pure.................................Per oz. 3.50 " Sulphate............................ " 4.25 Benzoin, Gum...................................Per oz.,.10 Benzole, Genuine................................ Per pt.,.60 Benzine........................................." 15 Bismuth, Mett.................................. Per oz.,.75 " Ammoniocitrate........................ ".10 " Mett, Puriss........................... ".75 cc Acetate, Pure.......................... ".25 " Carb.................................. ".75 -c "Chloride............................... ".30 Oxide, Hydrated........................ ".75 Nitrate, Cryst.......................... ".40 (" Sub. ditto, Powdered.................... ".50 Tannate................................ ".80 "' Valerianate, C. P....................... " 1.50 Black Flux..................................... Per lb., 2.00 Bone-Ash, Am. (by the bbl., or 50 lbs., or more, special price)............................25 " French............................... ".40 c" Washed............................... ".60 Bleaching Powder. c".15 Borax, Refined. ".16 G" Glass.......................Per lb., $3.00, Per oz.,.25 " Pulverized............... c.10 Brazil Wood, True..............................Per lb.,.25 Bromoform, C. P................................Per oz., 2.50 liromine, Pure.................................. ".25 " Chloride............................... ".75 Brucia, C. P.................................... Per oz., 4.00 " Nitrate................................... c" 4.50 C. Cadmium, Mett, in stick; Pure, T................. Per oz.,.25 ((" " Ribbon........ ".75 " Bromide.... ".05 190 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Cadmium, Carbonate........................Per oz.,$.75 "( Chloride........................ 4".60 Iodide................................ ".75 Sulphide.............................. " 1.00 "C Oxide.................................. ".75 " Sulphate...............................40 Caffeine, Pure; very superior...................... " 4.50 " Citrate................................. Per oz., 5.00 Casein, " Pure...........................Per oz.,.10 Calcium, Mett, per Spec......................Per gram. 10.00 Acetate, C. P................... Per oz..15 Carb., Precc.; Pure.....................Per lb., 1.50 Chloride, Fused; C. P., T................ " 1.00' " Gran'l ".............. ".50 "' " ( Cryst. ".............2 " Bromide, Pure................. Per oz.,.30 Iodide............"............. ".50 " iNitrate, C. P., Cryst."..20 r" Fluoride, Pow'd.........................Per lb.,.10 " Cryst., native selected.......... ".30 r" Phosphide, Pure, T...................... Per oz..65 (" Phosphate................. Per lb. $2.00, ".25 " Sulphide................................08 Camphor, Best Borneo............................07 Carbon, Bisulphide............................... Per lb.,.50 " Trichloride, Liquid....................... Per oz., 1.25 Carbo, Animalis..................... Per lb.,.10 Carmine, Opt................................... Per oz. 1.00 Cerium, Mett, per specimen..................... Per gram 7.50 " Chloride...............................P er oz., 2.00 " Nitrate.............. c" 1.50 " Oxalate, Pure........................... " 1.00'Csium, Chloride.............................. Per Gram.6.00 " and Rubidium, Chloride............... Per gr..25,Cethyle.........................................Per lb., 1.00 Chameleon, Mineral, Pure.......................Per oz.,.12'Chloral, Hydrate................................ ".25 Chlorine, Aqueous Sol. of..................... Per lb.,.15 Charcoal, Willow, Pow'd, Pure.................... " 35 OF CHEMICAL AND PHYSICAL APPARATUS. 191 Charcoal, Willow, Prepared in blocks.............. Each, $. 10 Chloroform, Opt.................. Per lb., $1.25, Per oz.,.20 Chromium, Mett,............................. Per gram. 1.20 Chrome, Alum. See Alums. Chromium, Chloride, C. P.......................Per oz.,.50 " Sesqui Chloride...................... ".40 " " Oxide........................ ".30 " Green "..".30 " Carb................................ 1. 00 Cinnabar. See Minerals. Copper, Acetate, C. P., Cryst.T................... ".15 cc cc Corn., Pulv'd...05 "C Arseniate. C. P. T..40 " Arsenite..................................25 Ammoniated, C. P., T.................... ".2,0 Carbonate, C. P., Precc......................15 Chloride, C. P., T...........................50' " Di. " c;.25 " Chromate.........................20 Cyanide, C. P............................50 " Formate................. Per dr.,.40 " Iodide, C. P..................Per oz.,.75 Nitrate, Cryst., C. P, T....... Per lb., $1.00, ".10* " Oxalate....................25 " Oxide, C. P., Gran. Pow'd, T. Per lb., $2.50, ".25 cc" " Pure, Pow'd, " 2.00, ".15 " Reduced Puriss, Pow'd.....................35 " Mett, Pure Gran.............. Per lb., $1.85, ".15 " " Thin Foil, Pure......... ".75 ".10 " Sheet....................... ".65 ".08 " Scraps....................... 50 ".06 Turnings........40 ".05 " Sulphate, C. P., T............ ".45 ".10 Com'l...15 ".05 Ammoniated. C. P. T.....................15 " Sulphide.................................12 Cobalt, Acetate, C. P........................... ".75 " Mett, Cubes............................. " 1.25 cc C" C. P., T........................... 2.50 192 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Colbalt, Chloride, C. P., T..................... Per oz., $.60 " Carb., C. P., T........................... ".75 - " Nitrate, C. P., T..........................65 " " C. P., Sol. F. T................. ".40 " Oxalate, C. P., T.................." 1.00 " Oxide, C. P............................ " 1.00 (" " Com'l.......................... " Codeia, Pure..................................... Per dr., 1.00 Collodion, E. Sol................................. Per oz.,.18 " Cotton. Best Parry's................... ".75 Conine, Pure German............................Per dr.,.m7 Cream Tartar, Pow'd.......................... Per lb.,.50 Creasote, White.................................. Per oz.,.15 Crocus-Martis,........................ Per lb.,.12 ".05 Cryolite, Best. See also Minerals...Per lb.,.25 to.50 D. Dextrine, Opt., Pow'd............................ Per lb.,.20 Distilled Water..................................Per gal.,.20 Dutch Leaf......................................Perbook.10 Didymium, Chloride........................... Per gram. 7.00 E, Ether, Sulphuric...................... Lot,.0.... Per lb.,.90 V" Veritable, Cone............... 1.35 (' Acetic, Pure Cone................. Per oz.,.10;" Butyric....30 " (Chloric...20 Formic.................................40 Nitric, Spirits of..................Per lb., 1.25 " Oneanthic, Pure........................... Per oz., 8.00 Emery, Flour................................... Per lb.,.25 " Pow'd................................. c.20 F. Fehlings Sol., for physicians' and sugar-house use, indicating percentage of grape sugar...Per oz.,.12 Pelspar, Pow'd, White........................... Per lb.,.15 "i Native, Cryst........................... ".19 OF CHEMICAL AND PHYSICAL APPARATUS. 193 Fire Clay, Fine................................. Per lb., $.10 Fluor Spar, Cryst............................... ".15 ". " Pow'd........... ".10 Formyle, Chloride...............................Per oz.,.20 " Bromide............................. 2.50 " Iodide................................ Per dr.,.150 Fusible Metal.................................. Per oz.,.40 Fusel Oil, Pure..................Per lb., 1.00 Fruit Essences, Artificial; all varieties kept. G. Galena, Fine, for Blow-pipe work.................. ".30 Galls, Ground...................................Per oz.,.05 " Tincture of.......................".......15 Glass of Borax..................................25 Glucina, Carbonate.............................. Per dr., 1.50 " Hydrate............................... 1. 50 Glucose, in lumps............................... Per lb.,. Glycerine, Puriss.; water free, T................. " 9' Best American; very fine; free from lead and all earthy matters............... ".56 Gum, Arabic, picks.............................. ".7 " " sorts......... ".50 " Benzoin...................................Per oz.,.10 Tragacanth...............................,.10 Gums, of all kinds, at lowest market rates. Gold, Chloride, Sol.............. 2.00 Ditto, Dry, Pure, 15 gr. bottles............... 25.00 Oxide..................................... 35.00 " Metallic Leaf, xx Deep, Per book.............75 Graphite, Pow'd. Pure T........................ Per lb., 1.00 " In Lump..........................25 Gutta Percha. Pure. In Sticks..................Per oz., 1.00 Gypsum, Pulv........................... Per lb.,.10 Gelatine, Pure.................................. Per oz.,.15 H. ltlmatoxyline.............................Per. gr.,.03 194 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE I. Indigo, Pure, Best Bengal.......................Per oz., $.1.5 " Sulphate Sol..............................10 Iodine, Pure, Resublimed, T.................... c.50 " Crude........................... ".40 Iridium, Mett.............................. Per gram. 2.50 " Chloride.............................. 1.80 Iridosmium ".50 Indium, Mett.............................. " 6.50 Iron, by Hydrogen, Pure......................... Per oz.,.15 " Pulv., Sub., Pure........................... ".10 " Wire, Pure...................... ".20 " Acetate..................................40 " Ammoniated............................. ".10 Limatura, Alcoholized.......................05 " Arseniate.".40 Bromide..".35 "Carbonate, Precc. T.............. Per lb.,.60, ".10 C" " Proto, Precc..................... ".15 ( Chloride, Sesqui, Sol..............Per lb...;O, ".06 tC" " Fine Cryst., C. P.. " $.100, ".10 " " Proto............ ".75, ".10 " Chromate, Native........................... Per lb.,.25 Citrate, U. S. P........................Per oz.,.15 "' " and Ammonia....................... ".15 " and Manganese...................... ".20 " and Magnesia....................... ".20 C' Ferrocyanide, Pure..........................12 " " Coin.................".....10 " Filings..................................... Per lb.,.10 " Iodide, C. P...............................Per oz.,.50 " " Con..............................40 Lactate, Pure..............................2 " Oxide, Hydrated Peroxide................... Per lb., 1.50 " " Proto...............................Per oz.,.10 " " Red Oxide, Precc..................... Per lb., 1.20 c " (C Black Oxide, C. P...................Per oz.,.15 " " " Com'l............. Per lb.,.75, ".10 OF CHEMICAL AND PHYSICAL APPARATUS. 195 Iron, Nitrate, Per. Sol................ Per lb., $.50, Per oz., $.10 " Phosphate, Proto............... ".60, ".10 cC" " Per................. " 1.00 ".15 " Pyrophosphate, in Plates.................... ".15 " Sulphate, C. P., Cryst................ Per lb.,.09 " " Dried.............................18 " " and Ammonia, C. P................ ".20 " " and Potassa............ Per lb.,.80, Per oz.,.10 " " Sub., Pure..........................15 Sulphide, Fused, Opt.................Per lb.,.20 t" " Gran..............................30 " Tannate, Pure..................Per oz.,.40 " Tartrate................................... ".20 C " " and Ammonia......................15 Tersulphate, Sol., Opt..............Per lb.,.60 "' " ( and Potassa.................. Per oz.,.15 Tungstate................................Per lb.,.40 " Valerianate.............................Per oz.,.60 Jalapine,...................................... Per oz., 2.00 Kermes, Mineral............................Per lb., 2.50 Kaolin, Pure, White.................1............ ".15 Kreatine................................... Per gram. 5.00 L. Lead, Acetate, C. P., T.................. Per lb.,.75 " " Com'l............................. ".50 t " " Tribasic......................... Per oz.,.40 " Sub., Sol........................Per lb.,.40 Bichromate, Pure...........................Per oz.,.25 " Carb., Neutral............................ Per lb.,.35 " " Native. See Minerals. " Chloride, C. P..............................Per oz.,.10 Chromate, for Organic Analysis.............. ".1 " Hyposulphite.............................. ".10 " Iodide................................... 4". 04 j196 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Lead, Mett, C. P., in drops, for Assay purposes....... Per lb., $.75 Nitrate, Pure................................70 " Oxide, Red................................. 1.00 " " Proto, Pure...........................25 "....................................Per oz...10 " Phosphate, Pure..............30 " Sulphate, C. P.............................Per lb.,.50 " Tartrate, Pure.............................Per oz.,.20 " Tannate...................................25 Lithia, Carbonate, C. P........................... 1.50 " Citrate.................................. 1.25 " Sulphate.................................. 1.50 Lime, Chloride, Com'l............................ Per lb.,.20 Lithium, C. P............................. Peroz., 1.50 c" Bromide.............................. Per oz., 1.20 Iodide................................ " 1.25 Litmus. In Cubes, Pure......................... ".10 cc Paper, Blue and Red....................Per sheet.05 Logwood. In Chips............................. Per lb.,.10 cc Extract..............................Per oz.,.10 c" In Billets...........................Per billet,,50 Lupiline........................................ Per oz., o10 Lycopodium.....................................10 Magnesia, Caustic. C. P. T.........................Per lb.,. 00;" Carbonate, Precc........... Per oz.,.15 " Native. See Minerals. Citrate, Pure........................... Per lb.,.20 "..Nitrate............................. Per oz.,.20 r" IltHypophosphite...................... ".75 Phosphate..............................40 ".Sulphate, C. P.........................Per lb.,.30 ".Valerianate.........~...............Per dr.,.30 ~" Sulphate, Com'l........................ Per lb.,.10 " Sulphite..............................Per oz.,.10 Magnesium, Ribbon....................Per foot,.05, " 3.75 " Wire.................... ".05, Bromide............................ 1.00 OF CHEMICAL AND PHYSICAL APPARATUS. 197 Magnesium, Iodide............................... Per oz.,$ 1.00. " Chloride, C. P.......................Per lb.,.30 Manganese, Mett........................... Per gram. 1.00 Acetate............................... Per oz.,.30 " Bromide....................2....... 1. 25 (" Carbonate. T.........................35 cc Citrate...25................... C" Per Oxide; high test; Pulv...........Per lb.,.10 Chloride, Pure.................... Per oz..20 e" Hypophosphite................ Per oz.,.65 cc" Iodide.................... c" 1.10 " Phosphate........................... cc.50 cc Nitrate..35 Sulphate, C. P., Cryst......Per lb., $2.00 ".20 Mannite......................................... Per dr.,.30 M]Ieconin.......................................... Per dr., 2.50 Morphia, Pure Alkaloid.' Price, per oz., 9.00 cc Bimeconate......................" " 12.00 Chloride......................... " " 10.2O " Nitrate......................... " 12.00 " Sulphate......................... 7.00 -"' Valerianate....................... " " 8.50 Mosaic, Gold..Per oz.,.35 MZercury, Redistilled, Best,....... Per lb., 1.25 cc" " in quantities, special price. Acetate...............................Per oz.,.50.' Bromide................. ".50 Chloride, Proto......................... ".30 " Per Am........................ "cc.15 cc Cyandide, T............................ cc.50 c; Chloride, C. P. T., Per................... ".35 Iodide, Proto...........................'.55 cc c" " Deuto..................... ".50 c" Oxide, Black........................... "c.50 " Proto, Red....................... ".25 it cc Yellow.......................... ".35 c" Sulphide, Black.........................20 " Red......................... ".25 "c Sulphocyalidde...........................35 198 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Mercury, Sulphate, Basic......................... Per oz., $.20 " " Neutral..................... ".35 " Nitrate, Proto, T............... ".30 *' " Per, T.........................45 Me'.hyline........................ Per lb., 1. 00 Minium, Opt....................................15 Microcosmic Salt, Pure............. Per lb., $1.50, Per oz.,.15 Molybdenumn, Mett..........................Per gram..50 t" Oxide, C. P...............Per oz.,.55 " Sulphide........................... ".60 Menisperin, Pure..... 2.00 N. Naptha, Refined............. Per lb.,.55 "' Wood...................................75 Naphaline, Pure, T................. Per lb., $1.50, Per oz.,.20 Narceia.......................................Per dr., 7.50 Narcotine, C. P...............................Per oz., 2.50 Nessler's Solution, for delicate Ammonia reactions, Per fluid oz.,.25 Nickel, Mett, Cubes.............................. Per oz.,.40 " Carb, Pure.............................. ".75 " Chloride, T..................7.5 Nitrate, C. P. T.....80 Oxalate, ".......................... 1.00 " Oxide................................... 1.00 " Sulphate, C. P............................50 ( c" " and Ammonia..75 Nicotine........................................ 16.00 Nicotine.." 16.00 Nitro-:enzol....................................Per oz.,.15 0. Ores and Minerals. See Minerals and Fossils. Osmium, Mett.......................Per gram. 3.50 Olive (Oil, True.................................Per pt.,.60 Oils, Essential; all varieties kept; True........... " Rapeseed...................................Per pt.,.50 OF CHEMIICAL AND PHYSICAL APPARATUS. 199 P. Palladium, Mett............................. Per gram. 3.00 Chloride, 1 dr. bottles................. dr., 7.00 Parafine, Opt., Pearl............................. Per lb.,.40 Phosphorus. In Sticks.............Per lb., $1.50, Per oz.,.15 "r Amorphous....................... ".30 e" Chloride..........................Per dr.,. 75 Paiicreatine.................................... Per oz..75 Picrotoxine, Pure................... Per oz.,12. 00 Pyroxilic Spirit, Pure................. Per qt.,.50 Pipcrine...................Per oz., 1.30 Pepsine, Best, Refined.................. Per oz., 1.25 Phloridizine................................... " 3.50 Platinum, Chloride, Sol......................... Per oz.,.75 cc " Dry, T...." 7.50 "' and Sodium.......... cc 7.00 " Sponge.....................Per gr.,.03 " for Hydroplatinic Lamp....... Each,.25 " Wire...................................Per gr.,.21 Sheet....................2 " Plate................................ ".03 Potassa, Acetate, Pure...................Per oz.,.10 " Antimoniate............................ ".30 " Arseniate................................10 " Arsenite..................................10 "' Bicarbonate, C. P. T............... Per lb.,.50 (" " Com'l..."................. ".10 " Bichromate............................ re" " Puriss.......... Per lb. $1.00, Per oz.,.10 " Binoxalate. C.20 " Boro-Tartrate. T...15 (" Bisulphate, C. P. T...................... Per lb.,.60 Bitartrate, Cryst............... ".50 (C" " Puriss., T............... cc 1.00 " " Pow'd........................40 " Bromide.............................. Per oz.,.15 " arbonate, C. P., Sicc................... Per lb., 2.00 te" " Com...................... Per lb.,.20 200 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Potassa, Carbonate and Carb. Soda, C. P............ Per lb., $ 2.00 " SCaustic, Fused, White, C. P. T............. ".60 c" " " Brown..........."......... ".50 Cc" " " C. P., Am.................. ".75i C" " "L Dep. Alcohol, Puriss........ " 2.00 " Chlorate, Cryst., Best..................... ".40 " " Puriss........................... 1. 00 Chromate, Puriss............Per lb., $1.50. Per oz.,.15 " " Com............................ Per lb.,.60 " Citrate........Per oz.,.15 " Cyanide, Fused, Alb., Opt................1.15' -" " " " In 10 lb. cans......Per lb.,.80 c" " " " C. P. T., Per lb., Per oz.,.75 Chloride, C. P., T............." ".10 " Ferrocyanide, Pure..T........... ".15 Ferridcyanide ". T " ".2 Fluoride, C. P., T........................ ".75 "' Hypochlorate...40 Hypophosphite.............................25 "' Iodide, Pure Cryst(variable price) ".30 c " " Fused Puriss, T....................75 " Iodate................................... i" Hypermanganate............. ".20 Manganate................... " 15'" Lactate................................. 1.00 "' Liquor......................... Per lb.,.40 ".10 ~" Nitrate Cryst............................. Per lb.,.20 cc " C. P., Gran..50 Phosphate, Pure. cc 2.50 Nitrite, Pure, T.... in sticks............. Per oz.,.30: Oxalate............. ".20 " Bin..............................10 Pictrate, very scarce................... 2.50 " Silicate, Sol., C. P., T..............05 Dry " "..................... Per. lb.,60 (" Sulphate, Cryst., Pure.................... Per lb.,.50 " " Pulv...16 " Sulphite, Cryst.......................... Per oz.,.45 (" Sulphide, Fused C. P...................20 OF CHEMICAL AND PHYSICAL APPARATUS. 201 Potassa, Tartrate, Cryst. C. P. T..................Per oz., $.15 Potassium. In 1oz. vials........... Per oz., $3.50, Per'oz., 1.00 c" Sulphocyanide... C. P. T..............Per oz.,.40 Propylamin, Pure...............................Per oz., 1.50 c" Chloride.................... Per oz., 6.25 Proteine.......................................Per oz., Prussian Blue.................. cc.10 Quinia, Pure.................................... Per oz..4.25 Acetate................................ Per oz., 4.25 " Arseniate................................. " 6.00 " Chloride................................Per oz., 3.50 (" Sulphate....................Per oz., " 2.35 R. Itare Resinoids-Podophyllin, Leptandrin, Cimicifugin, Macrotin, Alnuine, Ampelopsine, Apocynin, Asclepidin, Baptisin, Barosmin, Caulophyll, Cerasine, Chelonine, Colocynthine, Cornine, Corydalia, Cypripedine, Digitalin, Dioscorein, Eryngine, Euonymine, Eupatoidin, Eupatorine, Eupurpurin, Fragerin, Gelseminine, Geranine, HIamamelin, Helonin, Humulin, Hydrastine, Hydrastin, Hydrastia Mur., Hydrastia Sulp., Hyoscyamine, Irisin, J alapin, Juglandin, Lobelin, Menispermin, Alyricin, Panduratin, Phytolacin, Populin, Prunine, Rhusin, Rumicin, Sanguinarina, Sanguinarina Sulph., Scutelarine, Senecionine, Stillingine, Trillin, Veratrin, Verbenine, Viburnin, Xanthoxylin. Rheine, Tilden's................................. Per oz., 4.25 Rhodium, Mett............................Per gram. 5.00 Rubidium, Chloride.............".........50 Rhigoline, Inoderous; Sp. Grav. 620..............Per botl.,.75 Ruthenium, Mett........................... Per gram. 6.50 S. Salicine............................... Per oz.,.50 Sanguine, Best Fr.................... Per lb., 1.25 202 E. B. BEsNJAMIIN S DESCRIPTIVE CATALOGUE. Selenium.................................. Per dr., $.75 Silicium................................. Per gram. 4.00 Santonin, Pure, Alkaloid................... Per oz.,.75 Silica, Fine ground................... Per lb.,.15 Silver, Mett Foil................... Per oz., 1. 5 " Gran., Pure............................... " 2.50 Leaf, "............................. Per book,.25 Acetate, Pure............................ Per oz., 3.50 " Bromide................................. " 2.50 Chloride.............. -. " 1.60 " Cyanide. Sol.. " 2.50'" Carbonate........................Per oz. 3.60 "' Iodide, Pure....................Per oz., 2.50 Nitrate, C. P., Cryst....................... 1.00 " Oxide.................................. " 1.75 "' Sulphate, Pure "................. 3.00 Soda, Acetate......... Per lb., 1.00 " Arseniate.......................Per oz.,.15 "c Arsenite....................................10 " Bicarbonate, Eng., Best................Per lb.,.07 C. P.. T................60 " Bromide.......................Per oz.,.15 Bromide, C. P....................Per lb., 1.50 " Biborate, Puriss... 1.00 " Bisulphate, Pure........................... ".60 " Bisulphite, C. P...................... c 1.20 Carbonate, Cryst., C. P., T............. ".40 c" Dried, Puriss., T...90.05 c" " Cryst., Corn...................... " Caustic, White, by Lime, Fused...............90 (C" " Alcohol, Dep., C. P., T.. 2.00 "'" by Sodium......................... Per oz., 1.25 " Chlorate, Cryst................".25 Chloride, Sol., U. S. P...................... Per bottle.20 ((" " Dried, C. P..T.................... Per lb.,.35 " Citrate, Pure................................Per oz.,.25 Fluoride.....................................Per oz.,.75 " odide, Pure, Cryst.. ".60 " Hyposulphite, C. P., T......................Per lb.,.70 Lime, Gran., C. P. T......... " 1.00 e {' yPow'd, C. P, rT $-O-25,w~o e OF CHEMICAL AND PHYSICAL APPARATUS. 203 Soda, Hyposulphite, Am., Opt...................... Per lb., $.09 "l Hypermanganate, C. P......................Per oz.,.10 "i Hydrosulphite. Cryst T...................... Per lb.,.75 " Hypophosphite......................... Per oz.,.75 " Iodate.................................... 2.0 " Lactate, Sol., Cone...........................60 Phosphate, Cryst., C. P. T.................... Per lb.,.65 " Pyrophosphate............................. " 1.30. " Nitrate, Cryst, C. P......................... ".35 " " " "Refined.......................20 " Pyrophosphate............................. Per oz.,.10 " Sulphite.................................. Per lb.,.75 " Santonate................................. Per oz., 1.50 " Sulphocarbolate.............................30 " Silicate, Sol., 3 lb. bottles....................Each,.90 " Sulphate, Com'l.......................... Per lb.,.04 "c cC Pure....30 - " " Pure........................ ".30 Tungstate................................... Per oz.,.15 Sodium, Mett................................... ".50 " Bromide.... C. P. T...................... ".10 c" Nitroprusside........................... " 2.00 c" Sulphide, Fused.......... Per lb.,.80 c " c Cryst.........................'.75 c ( " C. P.......................... Per oz.,.10 Solanine..................................... Per dram. 5.00 Spermaceti, Pure............................... Per lb.,.35 Spirits, Ammonia, U. S. P........................ ".35 Strontium, Mett.................................Per gr..60 Strontia, Carbonate, Precc................ Per oz.,.10 " Caustic............................... ".30.." Chloride, C. P., T.......... Per lb., $1.50 ".10 r" Nitrate, Dried.......................... Per lb.,.75 " Cryst.C................ P 1.25 (" Sulphate., See Minerals. "c " C. P.T.................... Per lb.,.75 S t rontianite. Strychnia, Cryst., Pure.......................... Per oz.,3.00 Acetate........................... " 3.50 " Chloride.............................. Per dr.,.75 204 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE Sulphur, Flos................................... Per lb.,$.0 " Roll................................06 " Chloride...............................Per oz.,.25 Iodide.............................45 (" Precc., Pure...........................Per lb.,.25 T. Tellurium, Mett........................... Per gram, 1.50 Thebaine, Pure................................. Per gr.,.50 Theii!e, Pure, Alkaloid............Per dr., 5.6(0 Thallium..................................... Per gram..50 " Chloride.........................50 Thymol........................................ Per oz., 1.50 Test Paper, Litmus, Blue..........Per sheet,.05, Per quire,.80 re" " Red.......... ".05, ".80 " " _Neutral....... ".05, ".80 c" Brazil Wood.......... ".05, ".80 c" Georgina............. ".06, " 1.00 c" Guaicum............. ".06, " 1.25 c" Turnleric............... ".0, ".80 c" Sulphate, Manganese... ".05, ".80 c" Schonbein's Ozone............Per pack,.10 c" Hydrosulphuric Acid.. Per sheet,.05, Per quire,.75 Tin, Mett., in bars................................ Per lb.,.60' " c Pure, in sticks......................... c" 2.50 Foil, Tissue............................ 1.25 " Mett., Granulated............................ 1.25 " Chloride, Pure, proto..........................75 C c" " " Liquid, non Aqueous..........Per oz.,.50 " "cc Crystals, Opt., T.................... Per lb., 1.00 4" " " Com'l.................... ".50 C Oxide. Pure, T.............................. " 2.00 " Bisulphide................................... Per oz.,.25 Sulphide, Proto............................ ".20 Tungsten, Mett............................. Per gram..50 " Oxide................................45 Turmeric, Pow'd................................. Per oz.,.05 Toluol. OF CHEMICAL AND PHYSICAL APPARATUS. Z05 I. Uranium, Acetate, Pure, C. P..................... Per oz. $ 1.00 "i Chloride "......................... " 00 " Nitrate.............................. " 1.00 " Sulphate.............................. ".00;' Oxide................................. Per oz., 1.00 Urea, Cryst., Pure............................... " 1.25 cNitrate. 1.00 " Nitrate................................... "!.00 V. Vermillion...true."....................10 Z. Zinc, Mett........................ Per lb..20 " " Puriss, Gran'l, T.......................Per lb.,.50 " Acetate, Cryst., C. P............ Per lb., $1.00, Per oz.,.10 " Gran'l, Com'l...Per lb,,.25 ((" " C. P., Arsenic, Free................... ".60 " " Bromide............................. Per oz.,.45 " Reduced, C. P., Puriss........................ Per lb., 1.25 Chloride, Dry, Opt....................... Per oz.,.10 Carbonate, Pure, Precc.......... Per lb.,.35, Per oz.,.05 Cyanide.................................... ".30 FerrocVaice.".30 Ferrocyanime.................................. ".30 " Hypophosphite.............................. 1.00 Iodide........................................60 " Lactate.................................... ".50 Nitrate, Pure............30 " Oxide, Precc................................ Per lb., 1.25 " Phosphate................................. Per oz.,.30 Phosphide................................... Per oz., 1.30 " Sulphate, Com'l............................. Per lb.,.10 Puriss., T.......................30 Valerianate................................Per oz.,.60 Zirconium, Oxide, Pure...... Per dr...50 Zircons, Native. See Minerals. MIN ERAjO GICAIL AND GEOLOGICAL DEPARTMENTS. DURING the past year, I have organized and incorporated into this establishment a Mineralogical and Geological department. My aim and desire is to furnish to those requiring them, characteristic, and, at the same time. Good Cabinet Specimens, for lecture and other purposes, at moderate prices; also, the usual sets and series for Students' use, Blow-pipe purposes, etc. Each specimen, without regard to size or price, will be distinctly labeled with full name and locality. Dana will be followed in all instances. MINERALS. 3473. —A Complete Set of Minerals, with pasteboard trays for placing them in, each specimen being perfectly characteristic and illustrating all the ordinary crystalized forms in which they occur. In all, 200 specimens; size about 2~ x 2j inches. This series will be found to be very suitable for academies, seminaries, the smaller colleges, etc. $50.00 3474. —A Collection similar to the above, but more complete, containing 300 specimens, 2~ x 2~ inches, neatly and securely packed in wooden boxecs; each mineral being numbered, with catalogue or same. This collection is put up and selected by a practical and experienced mineralogist, and will be found quite complete. Packed, $75.00 OF CHEMICAL AND PHYSICAL APPARATUS. 207 COLLECTION OF THE PRINCIPAL ORES OF THE METALS. Aluminum-Cryolite, Alunite, Lead-Galena. Kaolin. Manga nese-Pyrolusite. Arsenic-Arsenical Iron. Mercury-Cinnabar. Bismuth-Carbonate Bismuth, Molybdenum-Molybdanite. Native Mett. Nickel-Nicoliferous Pyrites. Chromium-Chromate of Iron Osmtium-Iridosmine. Cobalt-Zaffre. Platinum-Native Grains. Columbium-Columbite. Silver-IHorn Silver Copper - Sulphide, Malachite, Tin-Stream Tin, Sulph. Tin. Native. Titanium —Sphene, Rutile. Glucinum-Beryl. Tungsten-Tungstate Iron. Iron-Magnetic Oxide Hlematite. Yttria-Yttrotantalite. Lithium —Spodumene and Le- Zirconium-Zircons. pidolite. Zinc —Calamine, Blende. Price of this collection, $15.00 to 25.00 3475.-Set of 100 Minerals, of the most commonly occurring forms, neatly packed in pasteboard trays, etc. $15.00 3476. —Collection of Chemical substances, for beginners in Blow-piping, put up in tightly corked and correctly marked Homeopathic vials, of two drachms capacity, all C. P. Recommended by Kobel. About 50 in all, $7.00; about 25, $3.50 This includes a specimen of all the ordinary metals in a pure state for experimental reduction with Blow-pipe. 3477.-Blow-pipe Reagent Cases, for prospectors, mineralogists, travelers, etc.; consisting of Berzelius's Blow-pipe, with Platinum tip, Platina wire and foil, pair Pincettes, and ten of the most useful dry Blow-pipe Beagents, as follows: Borax, Boracic Acid, Oxide, Copper, Carbonate Soda, Microcosmic Salt, Fluoride Calcium, Sulphate Lime, Silicic Acid, and pure Tin. All complete, in an elegant polished mahogany case. $7.00 3478.-The same, with the addition of one Agate Mortar, one Mineral Hammer, one Anvil, three pieces of Charcoal,'six glass Tubes right size for making Blow-pipe Flasks, three glass Stirrers,-heavy glass Spirit Lamp, and four glass stoppered bottles filled with Hydrocloric, Nitric, Sulphuric Acids, and Cobalt solution. $12.50 3479. —Ditto, ditto, ditto, with Plattner's Blow-pipe Lamp instead of Spirit Lamp. $3.00 extra. 208 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3480.-A Collection of minerals of most excellent size, and of a character suitable for placing on the shelves of the College Cabinet, at the uniform price of 50 cents per specimen, averaging about 3x3 inches in size. These minerals were collected by a well known mineralogist of this city, and each specimen is a perfect example of its kind. They are not completely classified, and, therefore, I will sell them singly at an extremely low figure. Some of these, for example, Kyanite, Tourmaline, Zinc Ores, etc., are really deserving of very much higher prices. The greater part of this collection is from American localities. Agate, Chalcedony, Felspar, Allanite, Chalcopyrites, with Fluorite, Analcine, Epidote, Flint, Apatite, Chlorite, Franklinite, Asbestos, Calcified Wood, Flos. Ferri, Augite, Cinnabar, Float Stone Azurite, Clay, Concretions, Galenite, Asphaltum, Clintonite, Garnets, Massive, Arragonite, Coccolite, " Rhomboidal, Augite, Pyoxene and Columbite, " Precious, Scapolite, Copper, Native, Gibbsite, Amygdaloid, Copper, Native, with Graphite, Massive, Alunite, Epidote, " Cryst., Actinolite, Cryolite, Gypsum, Massive, Anhydrite, " with Spathic Iron, " Cryst., Anthropolite, Copper, Native, with Halite, Barite, Epidote and Ortho- Heavy Spar, Bismuth, Mett. clase, " " with Iron Beryl, Chondrodite in Cal- Pyrites, etc., Blende, cite, 11aematite, Brucite, Chlorophane, Heulandite, Calamine, Chalcocite, Hornblende, Massive, Calcite, Ferruginous, Dolomite, " Cryst.,: " Cryst., Dioptase, Hornstone, Massive, Diallage, HIypersthene, " Granular, Datolite, Hyacinth, Cassiterite, Emery, Idocrase, Celestine, Epidote, Ilmenite, Cerite, Ekelbergite, Iron Specular, OF CH'lEM1CAL AND PHYSICAL APPARATUS.' 209 Iron, Magnetic, Porphyry, Sulphur, " Pyrites, Pearl. Spar, " with Celestine, Jasper, Pectolite, Strontianite, Jaspery Trap, Petalite, Sphene, Jeffersonite, Plumbago, Spinels, pink and Kaolinite, Prase. Chondrodite, Kyanlte, Prehnite, Pargasite, etc., Labradorite, Pyrites, Iron, Spinels, Black, Lepid(olite, " Copper, Spathic, Iron, Lignite, " Magnetic, Steatite, Limonite, Pyrolusite, Syenite, Magnetite Cryst., Pyoxene, Sunstone, " Massive, Pyrrhotite, Staurotide, Malachite, Quartz, Crystal, Tabular Spar, Marrmolite, " Rose, Talc, Margarodite, " Smoky, Titaniferous, Iron, Mica, with green " Geodes, Topaz, Tourmaline. Realgar, Tourmaline, Massi, e, Mispickle. Rock Crystal, " Cryst., Molybdenite, Scapolite, " Green, Moscovite, Stibnite, Tremolite, Natron, Selenite, Wad, Obsidian, Seyberite, Willemite, Olivine, Schefeldite, Witherite, Opal, Common, Smoky Quartz, Wolframite, " Wood, Sepentine, Wood, Petrified, " Fine, Silicified Wood, " Opal, Orthoclase, Sillicious Sinter, Zinc, Blende, Orpiment, Stilbite, Zincite, Pargasite, Spodumene, Zircons. 3481.-A Set of Minerals, for illustrating the various shades assumed by minerals when generally in crystaline state: 1. Carrara Marble, White. 9. Dioptase, Green. 2. Calcites, " 10. Actinolite, " 3. Quartz, Gray. 11. Sulphur, Native, Yellow. 4. Talc, " 12. Common Opal, " 5. Obsidian, Black. 13. Jasper, Red. 6. Pyroxene " 14. Lepidolite,' 7. Azurite, Blue. 15. Agatized Wood Brown. 8. Fluor Spar, " 16. Mountain " i" Complete, in case, $10.00 210 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3482.-A Collection of substances well suited to illustrate the principal Blow-pipe Reactions, neatly put up in well corked vials or specimen tubes of uniform size. Very complete. $25.00 Carb, Soda, Alloy, Lead and Zinc, Molybdic Acid, Borax, " Tin and Copper, Oxide, Silver, Micro, Salt, Alloy, Zinc and Cad- Binoxide, Tin, Bisulph., Potassa, mium, Tungstic Acid, Boracic Acid, Zinc, Sesquichloride UraFluor Spar, Rock, Crystal, nium, Nitrate Cobalt, Gypsum, Oxide, Zinc, Oxalate Nickel, Cale., Spar, Chloride, Copper, Oxide Copper, Strontianite Arsenite, " Chloride, Silver, Witherite, Petalite, Lead, Magnesite, IaIamatite, Iron, Mica, Rutile, Tin, Felspar, Pyrolusite, Bone-Ash, Albite, Lepidolite, Chloride, Potassium, Sulphides, Cu., Sb., Apatite, Bromide, " and Pb. Franklinite, Iodide, " Sulphides, Arsenic, Pitchblende, Chloride, Sodium, and Antimony, Chromic Iron, " Ammonium, Onofrite, or Claus- Cerusite, Subchl'de, Mercury, thalite, Malachite, Protochloride, " Chlorate, Potassa, Gray Antimony, Antimony, Alumina, Iron Pyrites, Arsenic, Sulphate, Copper, Copper " Bismuth, Nitrate, Lead, Mispickel, Cadmium, Oxide, Antimony, Smaltine, Silver, Arsenious Acid, Cobaltine, Alloy, Mercury and Ox., Bismuth, Realgar, Tin, Ox., Cadmium, Cinnabar, Alloy, Lead and An- Sesquichloride Chro- Copper Nickel, timony, mium, Molybdenite, Alloy, Lead and Bis- Ox., Cobalt, Berthierite, muth, Proto-oxide, Mercury, Tetrahedrite. 3483.-A Set for illustrating the various temperatures of fusibleness of various minerals, according to Elderhorst. In case, $1.00 1. Gray Antimony, 4. Actinolite, 2. Natrolite, 5. Orthoclase 3. Almandine, or Iron Garnet, 6. Broncite. OF CHEMICAL AND PHYSICAL APPARATUS. -211 3484. —A Set of the various forms of Fossil Fuel. Price, $3.50 1. Anthracite, 5. Brown Coal, 2. Semi-Bituminous, 6. Lignite, 3. Bituminous, 7. Asphaltum or Bitumen, 4. Petroleum, 8. Peat. 3485.-Series of Ten Minerals, for illustrating and testing the different degrees of hardness of minerals: 1. Talc. Foliated, 6. Felspar, Cleavable variety, 2. Rock Salt, 7. Quartz, Transparent " 3. Calc. Spar, Transparent, 8. Topaz,' Crystal, 4. Fluor Spar, Crystal'd variety, 9. Sapphire, Cleavable variety. 5. Apatite, Transparent Cryst. 10. Diamond. Price, $5.00. In elegant wood case, $1.00 extra. 3486.-A Set of Minerals, for illustrating metalic color. In case, $3.50 1. Native Copper, 4. Native Antimony, 2. Magnetic Pyrites, 5. Galena, 3. Copper Pyrites, 6. Magnetite. 3487.-I have a few superior specimens of that curious variety of Quartz Rock, termed Itacolumite. The shape and size of these fine examples of this mineral are just right exactly, for class exhibition, viz.: in sawed slabs, about eight and one-half inches long, two inches wide, and one and one-eighth thick. Price, each, $2.00 3488.-A very Complete and well arranged cabinet of good sized specimens of minerals, intended for the use of Blow-pipe students and, public schools, put up in sections of about fifty minerals, each section enclosed in handsome case, with movable top, with numbered catalogues. Per section, $6.00 3489.-Ditto, ditto, consisting of full series of Rocks, of the various formations, arranged in accordance with Dana's System of Geology, with catalogue. For section of 50 specimens each, $5.00; 10 sections, $40.00. 3490.-A Set of Minerals, illustrating Cleavage: 1. Galena, 7. Felspar, 13. Sulphur, 2. Idocrase, 8. Calcite, 14. Pyromorphite, 3. Tournonite, 9. Fluor Spar, 15. Cryolite 4. Barite, 10. Blende, 16. Tabular Spar, 5. Gypsum, 11. Tungsten, 17. Iceland Spar, 6. Hornblende, 12. Limonite, 18. Rutile. Complete, in pasteboard case, $10.00 212 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE 3491.-A Suit of the various varieties of Mineral Oils, six specimens in all, put up in clear flint sample vials, for exhibiting to students the natural properties, color, etc., of petroleum, as found in the several localities of the United States. These samples range in specific gravity from 26 deg. Beaume to 50 deg. Beaume. $5.00 3492.-Minerals, chiefly American, unclassified; size about 2lx2T; excellent for completing amateur collections; all picked specimens; at the uniform price of, each,.25 The Calcite and Aluminous series in this selection are very well assorted, and are quite complete. Included in it are some specimens of that curious quartzose crystalization, from Bohemia, termed there, Kapp-Stein. 3493.-I have on sale a collection of Lava and Volcanic Tufa, which is, I think, worthy of considerable attention. It is a full series, from the various volcanoes in the Sandwich Islands, and was collected by Commodore Wilkes, in 1848, when there. It would be an exceedingly interesting addition to any college or private collection, possessing as it does also, great historical interest. Twenty specimens in all. $10.00 3494.-A Suit of Colorado Minerals, including all of the ores and minerals found in this great mineral-bearing Territory. This is a quite unique and interesting little collection, suitably labeled and arranged in fine pasteboard case, with partitions and movable top a0 in all. Price, $6.00 ELEGANT AND RARE CABINET SPECIMENS. This part of my collection I am giving great attention, and assure my patrons that nothing under this head will be found incomplete. Included in it I may mention some extraordinarily fine and beautiful specimens of Agate, finely polished. 3495. —Splendid Falherz Specimens, from Germany. 3496. —Magnificent Fluors, from Derbyshire and Cumberland, England. 3497.-Elba Iron Ores, Gstite, etc., of perfect beauty and size. 3498.-That very Rare and Exquisite, as well as wonderful, production of oceanic life, called " Venus' Flowing Basket," or "Explectella Speciosa," found 60 fathoms deep near the Phillipine Islands, OF CHEMICAL AND PHYSICAL APPARATUS. 213 and for a specimen of which Cummings, the great English naturalist paid, in London, ~30 only six or eight years ago. $5.00 each. 3499.-A Complete Set of Fossiliferous Rocks, of about 4 x 4 ins. in size, illustrative of the geological formations of New York. All of the New York groups and periods are fully illustrated with specimens from the principal localities in that State. Each specimen and group is characterized by its distinctive fossil or fossils. This collection of rocks has received the great approval of all the colleges who have purchased it, and is certainly deserving of notice, not only on account of its having been obtained entirely from New York State, but, also, for its completeness. It is believed to be the only collection of the kind ever put on sale in this country, and will be found to be eminently well adapted for teaching Dana's Geology in colleges, schools, etc. Carefully labeled with name of group, fossil, etc. 55 specimens in all. $25.00 3500.-There are left at my disposal two Cabinet Collections of Minerals, belonging to gentlemen of the highest standing in the World of science, but who, for private reasons, wish to dispose of them. Selected with rare taste and perfect mineralogical knowledge, through a long series of years, each specimen of these collections will be found to be unique examples of their class, and every class most fully illustrated. They have been gathered together from the most celebrated localities of the world, and contain specimens valued at $250 to $300 each. This is a rare opportunity for colleges. Price, $3,000 to 6,000 3501.-A Case of German Minerals, beautifully arranged, in an elegantly polished wood case, with drawers, containing 200 minerals, carefully wrapped for transportation, and completely classified and labeled; size of specimen averages about 1~ x 2 inches Price, with case included, $25.00 This case would make a very useful and handsome holiday present. 3502.-The same, as above, in all respects, except containing 150 minerals instead of 200. Price, $20.00 3603.-The same, as above, in all respects, except containing 100 minerals instead of 150. Price, $15.00 For the remainder of this department reference may be had to a separate Catalogue of Ward's Plaster Casts. APPARATUS IN SETS, AND FOR SPECIAIL P7URPOSES. The marginal figures in small type refer to numbers in regular catalogue. 3504 3504.-Set of Apparatus and Chemicals, for fifty initiatory experiments for boys and girls, with directions for using. These are packed in a neat wooden box, with compartments and hinged lids, and consists of the following- articles. Price $10.00 APPARATUS. 1 Glass Flask, 1 oz., 3 Test Papers, 1 each color, 1 Small Salnd Crucible, 50 Small Filters, cut, I Shallow Sand Bath, 2 in., 1 Jeweller's Blow-pipe, 1 Small Porcelain Crucible, 1 Corrugated Funnel, 2 in., I Glass Mortar and Pestle, 2 in. 1 Porcelain Evaporating Dish, 3 in., 2 " Stirring Rods, 1 Piece Tin Foil, 1 " Spirit Lamp, 1 " Rubber Tube, I Small Tripod, 1 Pair Iron Pincettes, 1 Test Glass, with lip, 3 inches Copper Wire, 4 Test Tubes, 3 " Iron " 2 Test Tube Holders, 2 ft. Magnesium Ribbon. OF CHEMICAL AND PHYSICAL APPARATUS. 215 CHEMICALS. Acid, Boracic, Galls, Tinct., Manganese, Oxide, Benzoic, Gum Arabic, Mercury, Nitrate, " Tartaric, Iron Filings, Pharoah's Serpents, Alum, " Sulphide, Phosphuretted Oil, Ammonia, Carbonate, " Sulphate, Potash, Prussiate, a. Chloride, Isinglass, Potassa, Bichromate, t" Oxalate, Lead, Acetate, " Carbonate, Antimony, Metallic,' Oxide, " Caustic, (( 6 Sulphide, Lime, Carbonate, " Chlorate, Baryta, Nitrate, " Chloride, " Nitrate, Borax, " Phosphate, Potassium, Iodide, Camphor, Litharge, Silver, Nitrate, Charcoal, Litmus, Soda, Carbonate, Cobalt, Chloride, " Paper, Red, Blue, " Phosphide, Copper, Nitrate, " Tincture, " Sulphate,' Sulphate, Logwood, Strontia, Nitrate, Fire Clay, Lycopodium, Turmeric Paper, Fluor Spar, Magnesia, Carbonate, Zinc, Granulated, Galena, Magnesium, Sulphate, " Sulphate. 3505.-Set of Apparatus and Chemicals, according to the following list, adapted for use in ordinary schools. Price, $10.00 APPARATUS. 1 Alcohol Lamp, I Test Tube Holder, 1 Pack. Cut Filters, 1 Retort Stand, 2 Rings, 1 Pneumatic Trough, ~ lb. Glass Tube, 3 Pint Flasks, 1 Small PorcelainMortar, 3 ft. India Rubber Tube, 3 Quart "'2 Small Evap'ing Dishes, 1 Glass Funnel, 3 in. 6 Test Tubes, ass'd sizes, CHEMICALS. 1 oz. Acid, Arsenious, 2 oz. Fluor Spar, I oz. Potassium, 1 " " Miuriatic, ~ " Iodine, 1" " Cyanide 1" " Nitric, 4 " Iron, Sulphate,. " " Iodide, 1 " " Oxalic, 4" Lead, Acetate, 1" Silver, Nitrate, i " " Sulphuric, 4" Lime, Chloride, 2" Soda, Sulphate, 4" Alum, 1 lb. Manganese, Oxide, " Sodium, 4 " Ammonia, 1 " Mercury, 2 " Strontia, 4" " Carbonate, 1 oz. " Chloride 4" Sulphur, 4 " Ammonium, Chl'de, i " Nut Galls, 2 " Wax, 4 Antimony,'2 " Potash, Prussiate 6 ft. Iron Wire, 4 " Tartrate, Yellow, 3 " Magnesium Wire, 1 " Baryta, I " Ditto, ditto, Red, 1 Piece Copper, " Bismuth, 2 " Potassa, 1 " Zinc, 4 " Borax, 2 " " Bichromate, 2 Sheets Litmus Paper, 1" Cobalt, Chloride, 4 " " Chlorate, 2 " rurmeric" 4 " Copper, Sulphate, 2 " " Nitrate, 1 Stick Phosphorus. 3506.-Set of Apparatus and Chemicals, the same as the foregoing, with the following additions. Price, $15.00 APPARATUS. 1 Deflagrating Spoon, 1 India Rubber Gas-bag, 2 Stop-cocks, 1 Evolution Flask, with 1 gal., 1 Tripod, Funnel and Tubes, 1 Jeweller's Blow-pipe, 1 Wash Bottle. 6 ft. India Rubber Tube, 3507.-Set of Apparatus and Chemicals, following, carefully packed in a dovetailed box, with sliding lid, and adequate to 216 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE the performance of the exueriments in " Steele's Fourteen Weeks in Chemistry." Price, $20.90 APPARATUS. I Alcohol Lamp, 4 oz., I Mortar and Pestle, 1 Deflagrating Spoon, I Ring Platinum Sponge, 2 Evaporating Dishes, 1 Stop-cock and Connector, for Gas, 1 Evolution Flask, with Funnel and bag, Delivery Tube, * 6 Test Tubes, assorted sizes, 1 Florence Flask, with Delivery Tube, 1 Tripod, 1 Flnllnel, 3 in., 2 Tubes, for Hydrogen Tones, 1 Jeweller's Blow-pipe, 1lb. French Glass Tube, 1 Small Lead Tray, 1 ft. India R'r Tube, for connections. CHEMICALS. Q oz. Acid, Arsenious, 2 oz. Fluor Spar, ~ oz. Potash, Yellow." Oxalic, " GunL Cotton, for Prussiate, 4 " Alum, Collodion, " " Red Prussiate, 4 " Ammonia, " Iodine, 1" Potassa, Bicarbou'e, 1 " Ammonium,Chlll'de, 2 " Iron, Sulphate, 4" " Chlorate, " Antiniony,Metallic, 2" " Sulphide, 1" " Nitrate, ~ " Barium, Chloride, 4" Lead, Acetate, 4 " Potassium, 4 " Bleaching Powder, I " Litharge, I " " Iodide, 2'" Bone Black, 16 " Manganese, Oxide, - " Silver, Nitrate, s" Calcium, Phosph't, - " Mercury, Chloride, Sol, Pieces, " Nat Galls, Ground, 1 " Sodiumn, -" Carbon, Bisulphide, 4 " Phosphorus, 4" Sulphur,' " Cobalt, Chloride, 1 " Platinum, Chlor'de, 2 ft. Magnesium Ribb'n, Solution, Sol., 1 Specimen Metal Alu2 " Copper, Sulphate, 2 " Potash, Caustic, mimuln, 4 " Ether, Sulphuric, Sticks, 6 Sheets Filter Paper. 3508.-Set of Apparatus and Chemicals, to illustrate Wilson's Course in Chemistry, packed in the same manner as the foregoing. Price, $85.00 APPARATUS. 1 Pneumatic Trough, 1 Woulff's Bottle, 1 qt., 1 Alcohol Lamp, 1 Nest Beakers, 1 Davy's Safety Lamp, 1 " Evaporating Dishes, 2 Bunsen Burners, 4 doz. Test Tubes, assorted, 1 Compound Blow-pipe, plain, 4 " Thistle 1 Mouth " - " Safety " 1 Liebig's Condenser, 1 Jar, for Iron Wire Experiments, 1 Glass Oxygen Flask, I Retort Stand, 3 " Retorts, each I pt., 2 Rubber Bags, 8 to 15 gals., 6 " Tall Jars, 1 " Gas-bag, 6 gals., 2 " Receivers, each 2 qts., 1 Piece Brass Wire Gauze, 6 ins. sq., 12 " Flasks asso'd sizes, 4 to 16 ozs, 1 " Platinum Foil, 4' Flnnels, assorted, 1 yd. " Wire, 2 lb. Glass Tube, 4 yds. 3 irns Rubber Tube, 1 "' Rods, 3 Detlagrating Spoons, 1 Graduate, 4 ozs., 3 Packs Filter Paper. 2 Pouring Glasses, CHEMICALS. Acid, Arsenious, Ammonia, Bismuth, " Muriatic, " Carbonate, Borax, " Nitric, Ammonium, Chloride, Cobalt, Chloride, " Oxalie, Antimony, Copper, " Sulphuric, " Tartrate Copper, Sulphate, Alum, Baryta, Nitrate, Fluor Spar, OF CHEMICAL AND PHYSICAL APPARATUS. 217 CHEMICALS.- Continued. Iodine, Nut Galls,: Potassium, Iodide, Iron, Phosphorus, Silver, Nitrate, Sulphate, Potash, Soda, Sulphate, Lead, Acetate, Potassa, Bichromate, Sodium, Lime, Chloride, " Chlorate, Strontia, Nitrate, Litmus Paper, " Nitrate, Sulphur, Magnesium, Potassium, Turmeric Paper, Manganese, Oxide, " Cyanide, Wax, Mercury, " Ferricyanide, Zinc. " Chloride, Ferrocyanide, 3509.-Set of Apparatus, to be used in illustrating Barker's Text Book of Inorganic Chemistry, packed in the same manner as the last. Price, $100.00 1942. 1 doz. Glass Cylinders, 12 in., 3016. lTubulatedRetort and Receiver, Fig. 10,p. 103, pint, 1516. i " Saltmouths, assorted. " 1 " " "~ i " 2276. t " Flasks, ~ pint, 2054. 1 Metal or Glass Cistern, 2322. " Funnels, assorted, 1 Porcelain Cistern, Fig. 15, p. 1540. L " Woulffis Bottles, i pint, 117, 1538. i " Woulfi's Bottles, 2 necks, 1 Adjustable Clamp, Fig. 15, p. 1446. i " Bell Glasses, 1 pt., 2 qts., 117, 1 gals., 1971,'72,'74. 1 Phosphorus Tripod Ap1453. - " Stoppered Bell Jars, quart, paratus, J ig. 17, p. 119. 3'262. " Conical Test Glasses, 1478. 1 Compound Blow-piile, 3269. 1 " Test Tubes, 5 in., 3108. 1 Wire Gauze Cage, Fig. 1, p. 91, 3269. 1 " " " 6 in., 1960. 1 Safety Lamp, 3364. ~ " U Tubes, 3186. 1 Gas Furllace, Fig. 7, p. 98, 3265. " Bulb " 1602. 2 Bunsen Burners, 2331. i " Funnel Tubes, 3234. 2 Retort Stands, 2335. A " Safety " Fig. 11,p. 104, 3066. 4 Iron Sand Baths, 1469. i " Combustion Spoons, 1969. 6 Combustion Spoons,with cov'rs, 2907. i " Pipettes, 3226. 1 Test Tube Rack, 2402. 1 Hydrogen Generator, 1405. 1 Hydrogen Balloon. 2395. 1 Sulphuretted " 2382, 2383. 1 Two-Gallon Gas-bag, with 2203. 1 Eudiometer, straight tube, Stop-cock. 2204. 1 " Ure's, 2221. 1 Nest Evaporating Dishes, 2189. 1 Diffusion Apparatus, Fig.3, p.9'2, 1422. 1 " Beakers, from 1 qt. down, 1714. 1 Calcium Chloride Tube, Fig. 6, 1899. 1 " Hessian Crucibles, p. 9;, 1885. j doz. Porcelain Crucibles, with 2862. 1 Siemen's Tube for Ozone, covers, 1 Apparatus for Decomposition 3378. 1 lb. Glass Tube, assorted, of Water, 3387. 8 ft. Rubber " 1452. 1 Copper Bell Glass, with Stop- 2938. 3 ft. Platinum Blow-pipe Wire, cock, oz. Platinized Asbestos. See 2055. 1 Drying Bottle, Fig. 7, p. 98, Chemicals. 3510.-Set of Apparatus, arranged for the purpose of illustrating a short course of Popular Lectures. Price, $200.00 2827. 1 Porcelain Mortar, 3j in., 3080. 1 pr. Trimming Scissors, " 1 " 5 " b 3321.1 "SmallTongs, withbentends, 2822. 1 Iron, " 6 " 1750. 1 "Tube Tongs, wood, 2598. 1 Glass Spirit Lamp, 3319. 1 "Charcoal Tongs, 2614. 1 doz. Wicks for ditto, 3322. 1 "Steel Crucible ditto, 2035. 1 Porcelain Dome for ditto, 2303. 1 "Platinum Pointed Forceps, 2590. 1 Brass Argand Spirit ditto, 2276. + doz. Glass Flasks, 4 oz., 2614. 1 doz. Wicks for ditto, i it i 8 " 2586. 1 Blow-pipe Spirit ditto, " t" " 4 16 " 218 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE APPARATUIS.-Continued. 2276. 2 Glass Flasks, 32 oz., 2040. 1 Ditto, ditto, ditto, stoppered, 2233. 1 " with DeliveryTube, 3406. 1 Washing Bottle, pint, i 1 Evoluti,n flask, with Delivery " 1 " " quart, Tube, 1542. 2 Woulff's Bottles, 3 necks, 3027. 3 Plain Retorts, 4 oz., 1519. 2 Bottles, with glass stoppers, for " 3 " " 8 " Distilled Water, " 3 " " 16 " 1519. 3 Ditto, ditto, ditto, quarts, 3031. 2 Clark's Retorts, 1519. 3 Ditto, ditto, ditto, i gal., 3040. 1 Oxygen " quart, 1524. 1 doz. Ditto, ditto, ditto, 8 oz, 3033. 2 Tubulated Stoppered Retorts, 1524. 1 " Ditto, ditto, ditto, 16 oz., 8 oz., 1532. 1 Bottle, for Chlorine, 2 Ditto, ditto, ditto, 16 oz., 3164. 1 doz. Glass Stirrers, 3 in., "2 Ditto, ditto, ditto, 32 " 3164. ~ " " 6 3016. 2 Ditto, ditto, Receivers, 4 oz., 3164. " " 9"' 2 Ditto, ditto, ditto, 8 " 2906. 1 Straight Pipettes, " 2 Ditto, ditto, ditto, 16 " 2907. i Bulbed " 3234. 1 Iron Retort Stand, with 3 Rings, 2955. 1 Japanned Pneumatic Trough, 1422. 1 Nest Beakers, plain, Nos. 0 to 8, 12x15, 1434. 1 " " lipped, 1 to 5, 2671. 1 Mercury Trough, 10 lbs, 3269. 3 doz. Test Tubes, 5 in., 3378. 2 lbs. Glass Tubing, assorted, " 3 " " 6 " 3387. 6 ft. Rubber Tubing, 1.575. " " Brushes, 2333. j doz. Funnel Tubes, 3274. 1 " " Holders, 1356 1 Arsenic 1 Nickle Plated Test Spoon, 302L2. " Reduction" with 1 Bulb, 3278. 2 Porcelain Test Plates, 3023. i " " " 2 3262. 2 Conical Test Glasses, 2 oz., 3358. 1 Set Tubes for Hydrogen Tones, 2 " " " 4 " 1583. 1 Pipe for Hydrogen Bubbles, " 2 " " " 8 1405. 1 Small " Balloon, 3226. 1 Test Tube Rack, 2402. 1 Glass " Generator, 3367. 1 doz. Sheets Test Paper, each 2220. 2 Sets common Evaporating Red, Blue and Yellow, Dishes, with lips, 1 Collection Test Metals. See 2225. 1 Porcelain ditto, 6 in., Minerals. 2225. 1 " " 10 " 2357. 1 Hand Furnace, Clay, with Iron 2'225. 1 " " 12 " Binding, 2216. 1 Set R(oyal Berlin Evaporating 3353. 1 Tripod Support, Dishes, small, shallow, 3215. 2 Table Supports, with Fork and 1885. i DOz., ditto, Crucibles, No. 2. Pins, 1897. 1 Nest of 5 Hessian " 3206. 1 Hinged Wood Clamp Support, 1893. 1 Platinum Crucible, 3237. 1 Shelbach's Support, with Iron 3408. - doz. Watch Glasses, 3 in., Foot, 3408. E " " 4 " 2322. 1 doz. Glass Funnels, assorted,:1408. 1 " "5 "'2335. 2 Safety " 3409. 1 " " Springs, 2331. 1 Com. Filte, ing ditto, 1690. 3 Small, shallow R. B. Casseroles, 2216. 2 Filter Dryers, 16~7. 1 Semi-Berlin Casserols, 4 in., 3255. 1 Pack Filters to fit Funnels, 1687. 1 "'. " 6 " 3216. 1 Wood Filter Stand, with 1 arm, 2002. 6 Assorted Porcelain Digesters, 3218. 1 " " " " 2 " 1283.'84. 3 " Glass Adapters, 2251. 2 Porcelain Filter Rings, each 1942.6 " " Cylinders, with with 3 arms, Ground Tops, 2442. 1 Graduated Measure, 4 oz., 1446. + doz. Bell Jars, pints, 1 " " 8 " 1446. ~ " " quarts, 1 " " 16 "' 1448. 1 Bell Jar, with Glass Foot, 6 x 2440. 1 Minim Glass, 12 in., 3065. 1 Deep Sand Bath, 7 in., 1452. 1 Bell Jar, with Brass Cup, Stop3066. 1 Shallow " 6 " cock and Connecting Tube, 1280. 1 Air Globe, 1 gal., 2550. 3 Specie Jars, with Ground Tops, 1971. 1 Deflagrating Globe, 2 gals., i gal., 1966. 1 " Spoon, " 6 Ditto, ditto, ditto, ditto, 1 gal., 1 " Cap, 1486. 1 Berzelius, Blow-pipe, 2039. 1 Schuster's Dropping Bottle, 1846. I Gross Assorted Corks, plain, 1851. Set of 12 " Corkborers, OF C11EMICAL AND PHYSICAL APPARATUS. 219 APPAATUS.- Continued. 2024. I Still:ind Worm, 2 eals.. 3256. 3 Tapers, mounted on Wires, 24'0. 2 Sets of Von Baboi Apparatus 1864. J doz. Glass Covers for Jars. for evolving Suiphuretted 3237. 1 Triangular File, Hydrogen, 3236. 1 Semicircular " 2382. 2 Five-gallon Gas-bags, fitted, " 1 Rat's Tail " 4 in., 2417. 3 Assorted Gas Tubes, " 1 " " 6 " 1441. 1 Small Beehive Shelf 2578. 2 Sets Chemical Labels. 3341. 1 Lead Tray, N. B.-When gas is employed in the place of alcohol, gas-burners, with rubber connections, may be substituted for the spirit lamps at a small increase of cost. A set of chemicals, adequate to the performance of experiments with the foregoing apparatus, can be supplied for about $25.00. ~~3511~ ~ 00 3511 3511.-Set of Apparatus, for conducting operations in Volumetric Analysis. Price, $60.00 No notice is taken, in this list, of instruments which are not volumetric; such as Balances, Weights, Boiling Flasks, Gas-burners, etc. Full information respecting such instruments may be found in other sections of this work. 1390. 1 Mohr's Burette, 100 c.c., in 1591. 1 Ditto, ditto, 50 c.c., in tenths, halves, with Stopcock, 2 Ditto, ditto, 50 c c., in fifths, 1587. 1 Bink's Burette, 100 c.c., " 1 Ditto, ditto, 25 c.c., in tenths, 3207. 1 Wood Support for 4 Barettes, 220 E. B. BENJAMIN' S DESCRIPTIVE CATALOGUE APPARATUS.- Continued. 3204. 1 Brass Support for 2 Burettes, 1946. 1 Graduated Cylinder, 1,000 c.c., 1597. 5 Erdman's Floats to fit ditto, 2693. 1 Mixing Jar, stopper'd, ],000c.c., 2913. 1 Graduated Pipette, 100 c.c., in 2692. 1 " Bottle, 1,000 c.c., ones, 3278. 1 Porcelain Slab, 5 in., "1 Ditto, ditto, 50 c.c., in fifths, 1333. 1 Alkalimeter, for Chameleon " 1 Ditto, ditto, 10 c.c., in fifths, Test, " 1 Ditto, ditto, 5 c.c., in tenths, 2924. 2 Porous Plates, for Drying Pre, 2907. 2 Bulbed Pipettes, cipitates,'2899. 4 Spring Clamps, with Tips, 1420. 1 Set of six Beakers, 1946. 1 Graduated Cylinder, with Lip, 326-2. i doz. Test Glasses, i oz., 50 c.c., 3164. 1 " Stirring Rods, 1 I Ditto, ditto, with ditto, 100 2318. i " Glass Funnels, 1 to 4 in., c.c., 3378. lb. Glass Tubing. " 1 Ditto, ditto, ditto, 250 c.c., 3267. 1 doz. Test Papers, each color, " 1 Ditto, ditto, ditto, 500 c.c., 2265. f quire Swedish paper. 3512. —Set of Apparatus and Chemicals, for the perform. ance of experiments in Agricultural Chemistry. Price, $65.00 APPARATUS. 1399. 1 Small Balance for Grain w'ts, 2970. 1 Conical Jar, tall, 4 oz., 2827. 1 Porcelain Mortar, No. 8, 3262. 3'" Test Glasses, assorted. 3410. 1 Copper Water Bath, small, 3066. 1 Iron Sand Bath, 5 in., 3226. 3269. 1 Test Tube Stand, filled, 2598. 1 Glass Spirit Lamp, 4 oz., 3274. 2 Test Tube Holders, wood, 2615. 3 ft. of Wick for the same, 2322. 1 Glass Funnel, 2 inches, 2442. 1 Graduated Measure, 1 oz., " 1 "' 2j 2279. 3 French Flasks, 4 oz., " 1' " 3 " " 3 " " 8 oz., 1897. 1 Sand Crucible, No. 0. 2276. 3 Bohemian " 8 oz., " 1'i " No. 1. " 3 " " 16 oz., " 1 " C" No. 2. 2389. 1 Evolution " with Delivery 2255). 1 Pack Filters, 5 in., Tube, pint, " 1 " " 6 in., " 1 Glass ditto, with ditto, " 1 " " 7 in., 3040. 1 Oxygen Retort, quart, 3217. 1 Filter Stand, 2402. 1 Hydrogen Generator, 1483. 1 Black's Blow-pipe, 1943. 1 Cylinder, with Lip and Glass 2925. 1 Small Platinum Capsule, a oz, Foot, 2x12 in., 312). 1 " Steel Spatula, 1446. 1 Knobbed Bell Jar, pint, 3321. 1 pair Japannea Tongs, " 1 " " " quart, 3155. 1 Horn Spoon, 1453. 1 Stoppered" " " 3350. 1 Porcelain Triangle, ~ 1 " " " gallon, 3164. I doz. Stirring Rods. 1687. 1 Porcelain Casserole, 3407. 1 pair Watch Glasses, 2002. 1 " Digester, 1755. 1 Watch Glass Holder, 3033. 1 Stoppered Retort, 4 oz., 2868. j doz. Sheets Litmus Paper, each 3027. 1 Plain Retort, 4 oz., color, 1 Brass Retort Stand, 1516. ~ doz. Salt-Mouths, 1 oz., 1971. 1 Defiagrating Globe, 1 gallon, 1517. ~ " Tinctures, I oz., 1966. 1 " Spoon and Cover, 1504. 11 doz. Packing Bottles, corked, 2222. 6 Semi-Porcelain Deep Evaporat- 2 oz., ing Dishes, " 1 " Ditto, ditto, ditto, 4 oz., 2210. 2 Berlin ditto, about 8 in., 2935. 1 Specimen Platinum Foil, " 2 ditto ditto, " 10 " 2938. 1 " " Wire. CHEMICALS. 1 oz. Acid, Acetic, 3 oz. Amnmonium Chlo- 2 oz. Copper, Bl'k Ox1i " " Tartaric, ride, ide, 4 " Alum, Crystals, 2 " Barium, Chloride, 2 " Iron, Proto-Sul1 " Ammonia, Carbo- 2 " " Nitrate, phate, nate, 4 " Calcium, Chlor- 4 " " Sulphide, 2 " " Nitrate, ide, Fused, - " Magnesia, Calc'd, 1 " " Oxalate, 4 " " Hydrate, 4 " " Sulphate, OF CHEMICAL AND PHYSICAL APPARATUS. 221 CHEMICALS.- Continued. 8 oz. Manganese, Per- 1 oz. Potassa, Carb'e, 1 oz. Soda, Biborate, Oxide, 4 " " Chlorate, 1 " " Carbonate, 1 " Mercury, Red Ox- 1 " " Hydrate, 1 " " Phosphate, ide, 4 " " Nitrate, 6 " Zinc, GraLlulated. - " Phosphorus, 3." Silica, in powder, 3513,-List of Apparatus, for use in the Volumetric Analysis of Urine. Price, $20.00 1590. 1 Mohr's Burette, 2322. 1 Glass Funnel 21 in., 3206. 1 Burette Support, 2255. 1 Pack Filters for each size, 2899. 1 Clamp and Tip, with Rubber 3216. 1 Funnel Holder, Attachment. 3262. I doz. Test Glasses, i- oz., 2913. 1 Graduated Pipette, 25 c.c. in" " " 1 oz., fifthls, 3269. i " " TestTubes, withwide "' I ditto ditto, 25 c.c. in tenths, mouths for Hydroleter, 1946. 1 ditto Cylinder, 500 c.c. lipped, 3226. 1 Support for ditto, 2909. 3 Fixed Pipettes, ass'd, 5 to 20, 1420. 1 Set of six Beakers, 2906. 3 Straight " for decanting, 1438. 1 Beaker Flask, 2276. 1 Bohemian Flask, wide mouth, 3278. 1 Porcelain Slab, 6 in., I pint, 2922. j doz. Porcelain Plates for IndiI 1 " " 8 oz., eating Test, I " " 16 " 2634. 1 doz. Sheets Litmus paper, each'd I " " 25 " color, 2636. 1 Litre " 1519. 1 Bottle forLitmus Tincture, " I quart'rLitre " 3406. 1 Wash Bottle, pint, 2322. 1 Glass Funnel, 1, in., 3164. i doz. Glass Stirrers, 6 inch. " 1 " " 2 " 3514.-Set of Apparatus and Chemically Pure Tests, for use in the Qualitative Analysis of Urinary Deposits. Price, $37.50 APPARATUS. 1400. 1 Balance, with Weights, 3321. 1 pr. Tongs for holding the same 2598. 1 Spirit Lamp, 1675. 3 Porcelain Capsules, assorted, 2615. 1 yard Lamp Wick, 3269. 8 Test Tubes, 6 in., 1644. 1 Lamp Cylinder, 3269. 2 " " 4x1 in., 3233. 1 Iron Stand, with 2 Rings, 3267. 3 doze Assorted Test Papers, 3066. 1 Sand Bath, 2322. 1 Glass Funnel, 2 in., 3110. 1 Water " 22.:5. 1 Pack Filters, to fit the same, 3353. 1 Tripod, 3164. 3 Glass Stirrers, 3461. 1 sq. ft. Wire Gauze, 3104. 4 " Slides, 2518,'19. 1 Urinometer, with Solution 3407. 3 Watch Glasses, Tube, 2440. 1 Graduated Minim Glass, 1885. 1 Porcelain Crucible, No 1, 2906. 2 Straight Pipettes, 6 in. 2925. 1 Platinum Capsule, i oz., CHEMICALS. 8 oz. Acid, Acetic,. 2 oz. Ammonia, Oxalate, 4 oz. Copper, Sulphate, 8 " Hydrochloric, 8" " Spirits, i " Silver, Nitrate, 8" " Nitric, 2" Baryta,Nitrate, 1 " Zinc, Chlo'ide,fus'd. 2 " Ammonia Carbon'te 4 " Potash, Caustic Sol. 3515.-Apparatus, for Qualitative Chemical Analysis. PrIice, $50.00 2829. 1 Porcelain Mortar,'2 in., 1644. 1 Lamp Cylinder Furnace, 2599. 1 Spirit Lamp, 3 oz., 3351. 2 doz. Wire Triangles, 2615. 1 yd. Wick for ditto, 3066. 1 Five-inch Sand Bath, 3080. 1 pr. Trimming Scissors, 1885. 1 Porcelain Crucible, 1 in., 3350. 2 Porcelain Triangles, 2424. 1 sq. ft. Iron Wire Gauze, 222 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE APPARATUS.- Continued. 3234. 1 Iron Retort Stand, with 3 Iron 1755 1 Watch Glass Holder, Rings, 1690. I Small Royal Berlin Casserole, 2424. 1 Coarse Wire Netting for sup- 3462. i doz. l-oz. Test Glasses,.-. - porting Tubes when in the -2906. i " Straight Pipettes, 6 in., Sand Bath, 2907. 2 Cylinder 2003. 1 Porcelain Digester, " 1 Bulb " 3323. 1 pr. Steel Crucible Tongs, 3259. 1 doz. 6-in. Test Tubes, 1671. 6 Small Evaporating Capsules, " 3 Test Tubes, 2in. high, 1 in. wide, plain, glazed both sides, 3378. 1 lb. Glass Tubing, i-in. bore, 2276, 1 Cooking Flask, each 2, 4, 6 oz., 3-274. 2 Wooden Test Tube Holders, 1419. 1 Nest Beakers, I to 5, 1575. 2 Test Tube Brushes, 3027. 1 4-oz. Retort, plain, 3406. 1 Wash Bottle, pint, 3033. 1 " " stoppered, 3387. 1 ft. Rubber Tubing, 3014. 1 " Tubulated Receiver, 2039. 1 Shulster's Alkalinleter, plain, 3331. 1 Clark's Retort, 6 Pieces of ordinary Glass, 4x6 in, 3217. 1 Funnel Holder, 3267. 6 Sheets Test Paper, assorted, 3164. I doz. Glass Stirrers, 3 in., 1 Small collection of Test Metals, " i " Ditto, ditto, each 6 and 9 in, for Precipitating, 2318. 1 Glass Funnel, each 2, 2., 3 in., 2233. 1 Evolution Flask and Delivery 2255. 1 Pack Filters, each size to fit Tube, above, 2427.- 1 Plate Cobalt Glass, 3226. 1 Test Tube Stand, filled, 1 Hollow Glass Prism, small, 2221. - doz. Semi-Berlin Evaporating 3278. 1 Flat Testing Slab, Dishes, a set,. 2924. 2 Porous Plates, for drying Pre3407. 1 pr. Watch Glasses, 2 in., cipitates, A collection of forty Reagents can be included in the above, in bottles, if required, at reasonable prices. 3516.-Apparatus for Physicians, for Medical Tests. $125.00 2829. 1 Small Porcelain Mortar, No. 0, 2447. 1 Blow-pipe Hammer, 3125. 1 4-in. Steel Spatula, 1356. 4 large Bulb Tubes, Arsenic, 1400. 1 Apothecaries Balance, small, Clark's, 3451. 1 Set Grain Weights, for ditto, 2276. 4 Glass Flasks, 1 eachll, 2, 4, 6, 8 oz, 2439. 1 Graduate, 1 oz., 3268. j doz. Hard Bohemian Test Tubes 2598. 1 4-oz Spirit Lamp, for MReductions, 2615. 1 yard Wick for ditto,, 1434. 1 set Lipped Beakers, 1 to 5, 3352 or'53. 1 Tripod, 1420. " Beaers, s to 5,. 3234. 1 Retort Stand, with 3 Rings, -408. 2'Watch Glasses, 3 in., 3066. 1 5-in. Sand Bath, 2205. 1 set Bohemian Glass Evapora-. 2424.; 1 Coarse Wire Gauze, for support- tors, plain, ing Tubes, 1755. 1 Watch Glass H'der, Hoffmann's, 3351. 6 Wire Triangles, 1756. 1 " " " Mohr's, 2424. 1 sq. ft. Iron Wire Gauze, 3269. 1 doz. Test Tubes, each 3 and 5in., 1486. 1 Berzelius' Blow-pipe, 3269. j " " " 3 in. wide, 1494. 1 Plattner's Blow-pipe Lamp, on 1749. 2 Wooden Test Tube Holders, Stand, 3227. 1 Mahogany Test Tube Stand,;1704. 4 pieces Prepared Charcoal, small, with Drying Pins, -1705. 1 Charcoal Support, 3271. 1 nest of Test Tubes, in paste~2938. 1 ft. Blow-pipe Platinum Wire, boara box, 2935. 1 sq. in. Platinum Foil, 2002,'4,'5. 1 doz. Porcelain Digesters,'2940. 1 Plat. Crulcible, with cover,i oz, assorted,.2925. 1 Platinum Capsule, I oz., 3262. i doz. 1 oz. Test Glasses,'3455. 3 ft. Fine Copper Wire, 3164. X " Stirring Rods, ea. 3 & 6 in., -2303. 1 pr. Platinum-pointed Forceps, 2906. i " Plain Straight Pipettes, b ~ 2928. 1 Platinum Spoon, or 6 in, 2308. 1 pr. Blow-pipe Tongs, with Pla- 2907. 1 Bulb Pipette, tinum Points, 2969. 1 " " Bent Top, 2298. 1 pr. Steel Forceps, 3378. i lb. Glass Tubing, 3080. 1 pr. Scissors, 2318. 1 Glass Funnel, ea. 1j, 2, 2+, 3 in., 3149. 1 Brass Weighing Spoon, 2255. 1 Pack of Filters for each size, 1344. 1 Blow-pipe Anvii, 3217. 1 Wood Funnel Holder, OF CHEMICAL AND PHYSICAL APPARATUS. 223 APPARATUS.-Continued. 2251. 2 Porcelain Filter Rings, 3 arms, 1885. 1 Porcelain Crucible, with Covers, 2246. 1 Filter Dryer, each 00, 0, 1, 2, 3, 3406. 8 oz. Wash Bottle, 1350. 1 Marsh's Arsenic Apparatus, 3408. 3 Glass Covers, 3 in., complete, 2924. 2 Porous Plates. 1356. 2 doz. Assorted Arsenic Tubes, 1 Small Collection of Test Metals, 2233. 1 Evolution Flask and Delivery 2634. 1 doz. sheets Litmus Paper, each Tube, Red and Blue, 3031. 1 Clark's Retort, 3278. 2 White Glazed Porcelain Slabs, 3033. 1 4 oz. Stoppered Retort, 2211. 1 set Royal Berlin, Small, Eva- 1542. 1 8oz. Wonlff'sBottle, fitted Rubp6rating Dishes, ber Corks. ~2210. 4 ditto ditto, No. 6, The following bottles, containing Chemicals, as below: 1524. Tinctures, 8 L-oz., 14 3-oz., 3 4-oz., 1516. Salt-Mouths, 16 i-oz., 7 4-oz. 6 8-oz., I CHEMICALS. 4 oz. Acid Acetic, 1 Piece Copper Foil, 3x3 1 oz. Potass. Sulphocy'de, 2 " " Tartaric, in., pure, 1 " " Carbonate, 2 " " Oxalic, 4 oz. Ferrous Sulphide, 1 " " Cyanide, 6 " Barium Chloride, 8 " " Sulphate, 1 " SilverAmm'd, Sol., 4 " Nitrate, 1 " Indigo, sI "DittoNltrate, cryst., 2 " Cobalt Sol. " 4 " Charcoal,Powdered, 1 " Zinc, Chloride, 4 " Ammonia C'bonate, 4 " Ferric Chloride, i lb. " Pure, ill Sticks, 4 " Chloride, 4 " Flux Black, 4 oz. Potass. Ferrocy'de, 4 " " Oxalate, 8 " Lead Acetate, 2 " " Ferridcy'ide, 4 " " Sulphide, 2 " Mercury Chloride, 2 " " Hlydrate, 6 " Calcium, Chloride, 2 lb. Manganese, Oxide, 1 " " Iodide, 1 lb. " Sulphate, i oz. Platinum, Chloride, 4 " " Nitrate, 1 oz. CopperAmmoniated Sol, 8 " Sodium, Carbonate, Sulphate, i lb. Potass. Bichromate, 2 " " Phosphate, 1 lb. Copper Sulphate, 2 oz. " Ferricyanide, 3 " Tin, Chloride. 3517.-Apparatus, for Miners and Engineers. Price, $105.00 1 Small Cheap Balance and Set 2938. 2 ft. Platinum Blow-pipe Wire, of Grain Weights. 2935. 1 sq. in. "4 Foil, 2439. 1 2-oz. Graduate, 2925. 2 Small Platinum Capsules, 1998. 1 Steel Crushing Mortar, 2:305. 1 pr. " " Pointed Tongs, 2818. 1 2-in. Agate " 3455. 1 yd. Copper Wire, 3827. 1 3-in. Porcelain Mixing Mortar, 1701. 1 doz. Blocks Prep'd Charcoal, 3125. 1 Steel Spatula, each 4 aid 6 in., 1 Bottle Charcoal Powder, 16 oz., 2237. 1 Triangular File, in handle, I " Rice Flour, 4 oz., 2236. 1 Round " " 2833. 1 Mould for Pastiles, "' I Half Round File, 3351. 1 Small Wire Triangle, 2599. 1 Glass Spirit Lamp, 3 oz., 3278. 2 5-in. Porcelain Plates, 2615. 1 yd. Wick for same, 3269. 1 doz. Narrow Test Tubes, 3 in., 3080. 1 pr. Trimming Scissors, 3371. 1 " Small Specimen Tubes, 3321. 1 " Japanned Tongs, corked, 3234. 1 Iron Retort Stand, with3 Rings, 2621. 1 Magnifying Lens, in horn case, 1885. 1 Porcelain Crucible, each 0 No. 1. 3378. 1 lb. Glass Tubing I in. bore, 20092, 2005. 8 Assorted Porcelain Di- 3333. 1 pr. Cupel Tongs, gesters, 1:356. 1 doz. Assorted Tubes, Liebig's 1488. 1 Berzelius's Brass Blow-pipe, form, with extra Jet, 1432. 1 Set 3-lipped Beakers, 2940. 1 Platinum Crucible, i oz., 1421. 1 " of 6 " 0 to 6, plain, 2604. 1 Plattner's Blow-pipe, Lamp and 2'276.. doz. Flasks, assorted, 2 to 6 oz., Stand, 3407. 2 Watch Glasses, 2 in., 1344, 2446. 1 Anvil and Hammer, 1755. 1 Hoffman's Glass Clamp, 3226. 1 pr. Blow-pipe Tongs, with Pla- 2575. 1 Blow-pipe Knife, tinum ends, 1690. 1 Small R. Berlin Casserole, No. I, 3116. 1 Mixing Spoon, with Spatula, 1687.1 Semi " " "' No. 1, 224 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE APPARATUS.- Continued. 2233. 1 Evolution Flask, with Delivery 2906. 2 Plain Pipettes, Tube, 1 Hare's Foot, 3031. 1 Clark's Retort, 3226, 3271. I Test Tube Rack, fitted, 3378. i lb. assorted Glass Tubing, 3274. 1 Wooden Test Tnbe HIolder, 2322. 1 Glass Funnel, ea. 2, 21 & 3 in, 1575. 2 Test Tube Brushes, 1864. 2 Glass Covers, each 3 and 4 in., 3267. 6 sheets Assorted Test Papers, 23'1. 1 Nest of German Fulnels, 1 Small Collection of Test Metals, 3216. 1 Small Funnel Holder, 2210. 3 Smallest size Royal Berlin Evap2251. 2 Porcelain Filter Rings, orating Dishes, 00, 0, 1, 2255. 1 Pack. Cut Filters, 4, 5, 6 in., 3164. 1 doz. 6-in. Glass Stirrers, 1 Wash Bottle, Berzelius's Form, 3008. 1 Box Blow-pipe Reagents. The Chemical Tests, to accompany the above Apparotus, will be packed to order, according to the number of bottles required. 3518.-Apparatus, suitable to be dealt out to Students in Colleges; each set nicely packed in dovetailed boxes, with sliding covers. Price, $15.00 2498. 1 Glass Spirit Lamp, 4 oz., 2278. 1 16 oz. Flask, Round Bottom, 2615. l yd. Wick, in paper box, 3406. 1 Pint Wash Bottle, 3233. 1 Small Retort Stand, 3104. 4 Glass Slides, 3351. 1 Iron Wire Triangle, 3378. ~ lb. Glass Tubing, 3 in bore, 3066. 1 Sand Bath, 2279. 1 Flask for Stulphur'd Hydrogen, 3414. 1 Porcelain Water Bath, 6 in., 3408. 3 Watch Glasses, 2 in., 1484. 1 Jeweller's Blow-pipe, 3164. 2 Stirring Rods, 6 2935. 1 Small piece Blow-pipe Foil, 3226, 3371. 1 Test Tube Rack, filled, 2938. 1 Piece 6-in. " Wire, 3267. 6 Sheets, each kind, Test Papers, 1885. 1 Porcelain Crucible, each 1 and 3387. 1 ft.. Rubber Tubing, ~ in., 1 in., 2318. 1 2-in. Bohemian Funnel, 3321. 1 pr. Japanned Crucible Tongs, 2317. 1 American " 3 in., 31.25. 1 4-in. Spatula,. 2255. 1 Pack Cut Filters, 3" 2827. 1 Porcelain Mortar, 21 in., " 1' " 5 " 1418. 1 Small Set B~.aker Glasses, 0 to 4, 2237. 1 Triangular File, 2221. 1 Nest Porcelain Evaporators, 2236. 1 Round " 2276. 2 4-oz. Flasks, 3519.-Apparatus, for performing most of the experiments described in Stockhardt's Chemistry. Price, $15.00 3033. 1 4-oz. Retort, 2322. 1 Funnel, I i and 2 in., 2276. 1 Flask, each 2, 4, 6 and 8 oz., 22- 5. 1 Pack Filters, each 3 and 4 in., 1416. 1 Set of 4 small Beakers, 3104. 6 Glass Slides, 2281. 1 Flask, round bottom, each 4 26:34. 1 doz. Blue Litmus Paper, and 6 oz., 1 Piece Pure Zinc, 2498. 1 Small Spirit Lamp, 3164. 2 Glass Stirrers, each 3 and 6 in., 2615. 1 yd. Wick, 2221. 1 Semi-Porcelain Evaporator, 1483. 1 Black's Blow-pipe, shallow, 31 in., 1502. 1 doz. ass'd 4-oz. Bottles, stop- 3029. 1 Glass Oxygen Retort, 2 bulbs,. pered and corked, 6 oz., 2938, 2935. 1 Small piece of Platinum 2233. 1 Flask, wit.hDeliv'yTube, 16 oz, Wire and Foil, 1441. 1 Beehive Shelf, 2829. 1 Porcelain Mortar, 00, 2236. 1 Round File, with handle, 1644. 1 Cylinder, 3378. i lb. Assorted Glass Tubing, 3422. 1 ft. W ire Gauze, 3353. 1 Brass Tripod, 3274. 1 Test Tube Holder, 3147. 1 Iron Spoon, 3226, 3371. 1 Test Tube Rack, filled, 3233. 1 Retort Stand, with 2 Rings, 2331. 1 Funnel Tube, 3066. 1 Small Sand Bath, 4 in., 1885. 1 Porcelain Crucible, 1715. 1 Chloride of Calcium Tube, 3262. 1 4-oz. Test Glass, 1356. 3 Arsenic Tubes, ass'd. The above apparatus can be enlarged at the pleasure of the purchaser. A set of chemical substances, accompanying the above, will also be furnished, if desired, at reasonable rates. OF CHEMICAL AND PHYSICAL APPARATUS. 225 3520.-Apparatus, for Analysis of Urine, to accompany Manual, by Dr. Austin Flint, Jr. Price, $40.00 APPARATUS. a 1 Urinometer, 6 oz., k Burette, graduated in grains, b 1 Thermometer, I oz., graduated in 1 200-Grain Measure, drachnms, m Tube, graduated in cubic inches, c Graduated Glasses, 1 drachm, with vessel in which it can be d 4 Conical Glasses, with Porcelain. inverted, Covers, n Rings and Clamp for Graduated e Porcelain Evaporating Dishes and Tube, Watch Glasses, o Stirring Rods and Drop Tubes, f Test Tube Stands, with Test Tubes, p Swabs and Brushes, for cleaning, g 3 Funnels and Filtering Paper, q Platinum Spoon for Calculi, h 3 Flasks and Wire Gauze, r Blow-pipe, i Buuseu's Burner, Rubber Tubing, 8 Colored Papers, gummed for recordetc., or Alcohol Lamp, ing the color of specimens. CHEMICALS.-Case of Reagents containing: ] Nitric Acid, 8 Sol. of Soda, Specific Gravity, 112, 2 Hydrochloric Acid, 9 Liquor, Potassa, 3 Acetic 10 " Ammonia, 4 Nitros-Nitric " 11 Ether, 5 Nitrate of Silver, in solution, 9'58 12 Mercury, grains in an ounce, 13 Solution of Hypochlorite Soda, 6 Sulphate of Copper, in ditto, 94-73 14 Ditto, Chloride of Sodium, sat'rat'd, grains in an ounce, 1 Test Papers, 7 Neutral Tartrate of Potash solut'n, 16 German Yeast. 378-91 grains in an ounce, EXTRA APPARATUS AND CHEMICALS. a Hydrometer, of Banme's, for Li- f A Balance at least delicate enough quids heavier than Water, to turn with -I- of a grain, b 1000-gr. 500-gr. and 100-gr. Specific g Graduated Solution of Chloride of Gravity Bottles, Barium, 366 grains, in six fluid c Water Bath, ozs. of Water, for Quantitative d " Oven and Swedish Filters, Analysis for the Sulphates, e 2 Wash Bottles and 3 Precipitating h 3 Separate Solutions for QulantitaGlasses, tive Analysis for Phosph'ic Acid. 1 Sesqui Chloride of Iron; 9'33 grs. 2-400-grs. of Acetate of Soda:, and of Iron by Hydrogen dissolved 800-grs. of Acetate Acid, in 6 in Hydrochloric with a little fluid ozs. of Water. Nitric Acid, evaporated to dry- 3.12-grs. of Ferrocyanide of Potasness and dissolved in 6 fluid ozs. slum, dissolved in 6 fluid ozs. of of Water, Water. 3521.-Apparatus, for Assay. 1369. Assay Balance, No. 1........................... $50.00 1370. Ditto, ditto, No. 2.. 72.00 1371. Ditto, ditto, No. 3.... 72.00 1372. Ditto, ditto, ditto, with Apparatus for Rider............. 78.00 3417 to 3433. Weights, various prices. 3522. Basin for Washing Gold.................................. 1.50 1462. Assay Bellows................................75 to 1.00 1486 to 1490. Assay Blow-pipes.-................................2.00 to 4.00 1581. Assay Brushes, for cleaning Button..........................50 1712. Ditto, Chisels, for clipping Ingots............................50 1876. Ditto, Crucibles...................................Per doz. 1.00 1877. Ditto, ditto, Iron..................'. 2.50 1878. Ditto, ditto, French, Beaufay...............05 to.08 1879. Ditto, ditto, Covers..........................................50 to.75 1870. Ditto, Glass Covers.........................................50 to.75 226 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. APPARATUS.- Continued. 1882. Assay Crucibles, Plumbago................................. $.20 to 1.63 1893. Ditto, ditto, Platinum......................... Per gramme..40 to.45 1895. Ditto, ditto, Metallurgists.....................20 1896 to 1907. Ditto, ditto, Sand.................................05 to.35 1908. Ditto, ditto, Roasting.-..-....75 1911. Ditto, ditto, Supports --.-.-........... —-—. —--—.-.60 1919. Bone Ash Cupels........ Per doz..35 to 2.25 1920. Cupel Holders...... -1.00 1921. Ditto, Moulds............................................. 2.50 to 4.50 2007. Iron Dippers................................................40 to.50 2008. Tin Dippers..,...........60 to.80 2016. Roasting Dishes........,... Per doz.75 to 5.00( 2217. Evaporating Dishes........................... Per set 2.75 2219. Ditto, ditto.....,,..,.. ". 2.50 2236,'37. Files...,,...........18 to.50 2273. Parting Flasks............. Per doz. 1.50 2274, 2275. Assay Flasks.............50 2296. Forceps, for crushing the Button........................... 1.75 2358. Furnaces, Keut's...................... 21.00 2360. Ditto, Cupelling........... 15 to 35.00 2361. Ditto, Hibb's Patent..... 50.00 2365. Ditto, Griffin's Gas.... 20.00 2368. Ditto, Chilton's............................................ 40.00 2448. Hammers..,... ----- ----- 1.00 2451. Ditto...................................................... 1.75 2453. Ditto........................................... — 2.50 2838. Ingot Moulds.........1.50 to 2.50 2822. Iron Mortars....,..-. —.- ------- -.40 to 4.7.5 2532. Ivory Scale, Harcourt's...... 5..... —....- -------------—..00 2621. Lenses or Glasses, Magnifying.............................. 2.50 2623. Ditto, ditto, Stanhope's.-...-..-..................- 2.00 to 2..,0 2688. Mineralogists' Slates, for trying the Streak of Minerals..-...40 to.50 2841 to 2847. Muffles..........................................30 to 2.50 3008, 3009. Reagent Cases.........................................2.50 to 4.00 3087. Scoops, for Assay.......................................... 1.50 3085. Scorifier Holders..................... 1.,50 2836. Ditto, Moulds......,,.....................5.00 to 7.00 3086. Scorifying Moulds......................................... 1.0) 3180. Stop-cocks of Silver, for Assay............................. 30.00 2297. Tongs, for holding hot Tubes.... -,1.00 ~3319 to 3320. Ditto, Coal.........................................1.00 to 1.75 3321 to 3328. Ditto, Crucible............50 to 6.50 3333 to 33:36. Ditto, Cupelle.............. 1.50 to 2.75 3337. Ditto, Scorifier..................,,....... —--- 1.25 Apparatus for General Use in Analysis: Spirit Lamps, Furnaces, Flasks, Beakers, Test Glasses, Baths, Filtering Apparatus, Evaporating Basins, Retorts and Receivers, Hydrometers, Stills, Gas Bottles, and other Analytical Apparatus, will be found under their respective heads in this work. 3523. —Apparatus, for Assay before the Blow-pipe. Lingke's Freiburg complete set of Blow-pipe Apparatus, for Qualitative and Quantitative Analysis, in German silver, comprising every article used in blow-piping, with reagents of the most choice kind, put up in extra fine, close-stoppered bottles, each bottle covered with an extra rubber cap to preserve their purity, with accurate Specific Gravity Balance, enclosed in a glass and mahogany case, and each department packed in highly polished mahogany cases, and the apparatus and reagents again enclosed in an elegant mahogany case, with lock and key, and the whole apparatus and scales enveloped in leather envelope straps and handles, for hand transportation. $275.00 OF CHEMICAL AND PHYSICAL APPARATUS. 227 3524.-Apparatus, the same as the foregoing, in Brass. $260.00 3525.-Ditto, Lingke's, for Gold and Silver Assay. 200.0b The above are all manufactured to order, by Dr. Lingke, and have his stamp on, and are well known to be the most complete apparatus of the kind to be found anywhere. The Balances are very celebrated for their delicateness and accuracy. 1370, 1372. Balances.................... $72.00 to $78.00 1482 to 1497. Blow-pipes, various.................................. 50 to 12.00 2932. Ditto, Tips, Brass and Platinum.............................10 to 1.50 2568. Ditto, Jets.............................................25 1344 to 1346. Ditto, Anvils..75 to 1.00 1581. Button Brush...........................50 1694. Carbon Cells, for fusions....................50 1672. Blow-pipe Capsules................................ Per doz. 1.25 1673. Ditto, ditto....................... Each.'20 1674. Ditto, ditto........................................ Per doz. 1.20 1675. Ditto, ditto........................... " 1.75 1701. Charcoal, 4 pieces for......................... —------ ----..25 1702. Charcoal Borers, Spatula Handles..-..30 to.40 1703. Ditto, ditto, 4 points, Cocoa Handles.......50 to.75 1704. Ditto, ditto, 8 points, "..1.00 to 1.25 1705. Charcoal Holders.................................. 2.75 1706, 1707. Ditto, Saws. ------........50 to.75 1708. Ditto, Spatulas..............................................50 1711. Ditto, Sticks...............................................50 to.60 1709, 1710. Ditto, Tongs.-.. -..-.75 to 1.'25 17 12. Chisels for clipping Ingots......................50 3526. Clay Cylinder................................................25 1800. Compasses................................................. 2.50 1806. Ditto.......-..-.... —--------------------------------- 15.00 1870. Covers of Glass for covering Choice Specimens....50 to.75 3527. Crucibles, Iron, with Cover. 1919. Cupels, Bone Ah...........................Per doz..35 to 3.25 Bone Ash, for Cupels, according to quality. See Chemicals...30 to.70 1920. Cupel Holders.....................1.00 2941. Cutting Pliers............. 1.2 2282. Blow-pipe Flasks.......Per doz..60 2291 to 2312. Ditto, Forceps...25 to 2.50 3528. Funnel Holders, Platter's.................................25 1346. Hammers, French, with two ends, one fiat for crushing, and one round end for pulverizing, with round anvil, having one side fiat for crushing, and the other side with concave center for pulverizing, and provided with a brass circular cap to retain the powder in the mortar, finely finished, with German silver tip to the handle...... 10.00 2446. Ditto, Plattuer's................ —.. —....................-.75 2447. Ditto, Freiburg..... 1.00 2448,'49. Hammers..................................... 1.00 to 1.25 2451 to 2453. Ditto, heavier..1.75 to 2.50 3529. Hare's Foot...10 2457. Holders for Platinum, Spoons and Wire.....................60 2575. Knives, Plattner's ---—....................,...75 2 76. Ditto, for Glass Tubing.....50 2604. Lamp, Plattner's,.........3.00 2596 to 2601. Spirit Lamps........................................50 to 1.00 2659. Lead Measures.................-......-...-.......... ----.50 2621 to 2628. Lenses............................................. 1.00 to 3.50 2646. Magnets, Bar.............. 1.00 2688. Mineralogist's Slates, for trying the Streak of Minerals..40 to.50 2690. Mixers, or Mixing Capsules, brass............................50 to 1.00 2691. Ditto, ditto, ditto, horn.................................... E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE APPARATUS.- Continued. 2818. Mortars, Agate - -..................................$1.90 to 30.00 1998,'99. Ditto, Diamond, of steel..... 5.00 to 7.50 2822. Ditto, Iron....40 to 4.75 2831. Ditto, Steel, highly polished.......................... 2.00 to 5.00 2832. Moulds, Boxwood, for Cartridge Cases.........20 1909. Ditto, ditto, for Charcoal Basins..75 1910. Ditto, Brass, for Clay Crucibles............................. 4.25 1921. Ditto, ditto, for making Cupels............................ 2.50 to 4.50 2836. Ditto, ditto, ditto, Scoritier................................. 5.00 to 7.00 2838. Ditto, Iron, fer Gold and Silver Bars.........................1.50 to 2.50 1922. Ditto, Steel, for Cupels, with Supports..................... 2.75 2837. Ditto, Woodl, for forming Charcoal pieces, oblong............ 1.25 3530. Ditto, ditto, ditto, ditto, blocks, square. 2813. Mouth-Pieces of Horn.......................................25 2814. Ditto, ditto, Ivory..........................................50 1580. Pencils, Camels' Hair, for taking up fine dust from the Balance Pan, etc................................25 Platinum Foil and Wire........................ Per grain..02k 3008. Reagent Cases, with turned Caps, small. 2.50 3009. Ditto, ditto, with space for Blow-pipe, Forceps and Platinum Box... 4.00 3i11,'12. Reagent Chests........................ --.. —---. 10.00 to 12.00 3046. Roasts, Plattner's... 2.00 2658. Scales, Harcourt's, for Measuring the Button................ 5.00 3080. Scissors.............................................. — 50 to 1.00 3099. Sieves, Box, Griffin's........................................ 2.50 3100.' Ditto, Plattner's, Brass..............50 3117. Spatulas, Horn.......................... —-----------------.10 to.40 3124. Ditto, Steel, small......................................40 3154,'55. Spoons, Horn..........................................15 to.50 3147. Ditto, Iron, small and large. 3113. Ditto, Ivory, Plattner's, small and large. 2928. Ditto, Platinum. 3267. Test Papers... Per sheet.05 3117. Tin Foil........................ — -- ------- Per square ft..15 3349. Triangles, Plattner's.....................................25) 13.57. Tubes, Bulbs, for subliming................Per doz..75 3417 to 3433. Weights, various prices. 3455. Wire, Copper....................................... Per lb. 2.00 Files, Flasks, Funnels, and other Apparatus. See appropriate apparatus under their respective heads. 3531.-Set of Instruments, for Blow-pipe Analysis. $45.00 1 Brass Blow-pipe, with 2 Platinum I Bar Magnet, Tips, 1 Magnifying Glass, with 2 Lenses, 1 Ditto, Blow-pipe Lamp, I Alcohol Lamp, with Brass Cover, I Stand for Evaporating Dish, Trian- 2 Ivory Spoons, gles, etc., 1 Charcoal Saw, 1 Funnel Holder and Chimney, 1 Mattiass Holder, 1 Platinumn Pointed Forceps, 1 Knife, I Brass Forceps, 1 Assay Button Brush, 1 Steel Forceps, for Lamp, 2 Mixing Capsules, 1 brass, 1 horn, 1 Pair Cutting Nippers, 1 Steel Mixing Spatula, 1 " Flat Forceps, 2 Brushes, 1 Platinum Wire Holder, with 6 Wires, 1 Box for Soda Papers, 1 Hammer, 1 Wooden Form for Paper Cylinders, 1 Anvil, 1 yd. Lamp Wick, 1 Steel Mortar, 1 Cupel Holder, with 2 Cupel Cups 1 Agate ditto,'2 in. in diameter, and 1 Mould, 1 Charcoal Borer, club-shaped, I Charcoal Holder, with Platinum 1 " " four-cornered, Ring and Screw, 1 " " with Spatula, 1 Test Lead Measure, OF CHEMICAL AND PHYSICAL APPARATUS. 229 APPARATUS.- Continued. I Box for Clay Crucibles, 12 Bottles with Glass. Stoppers, flat, 1 pair Lamp Scissors, 1 Charcoal Holder Stand, 1 Wash Bottle, 1 Coal Tray, 1 Dropping Bottle, 1 Dirt " 3 Porcelain Dishes, 3 sizes, 1 Clay Cylinder, 2 " Cups, for Gold Assay, 2 Iron Rings, 2 Watch Glasses, 1 Hare's Foot. 6 Wooden Boxes, for Reagents, 3532.-Set of Apparatus, for Quantitative Blow-pipe Use. $15.00 1 pair Flat Pincers, 1 Charcoal Holder, with Platinum 1 Assay Button Brush, Ring and Screw, 2 Mixing Capsules, 1 Brass, 1 Horn, 2 Ivory Spoons, I Cupel Stand, with 2 Cupel Cups and 2 Porcelain Cups, for Gold Assay, 1 Mould, 1 Box for Clay Crucibles, 1 Charcoal Borer, club-shaped, I yd. Lamp Wick, 1 " " four-cornered, 1 Steel Mortar, 1 " " with Spatula, I Knife, 2 Brushes, 1 large, 1 small, 1 pair Lamp Scissors, I Box for Soda Papers, 1 Wash Bottle, 1 Wooden Form for Paper Cylinders, 12 Glass Bottles, with Flat Stoppers. 1 Test Lead Measure, 3533.-Apparatus, for illustrating Hinrich's Elements of Physics. For exclusive use in the Lectures (see School Laboratory, 1871, p. 66), the teacher should procure as much as possible of the larger apparatus and finer specimens of crystals, minerals, etc., mentioned in the work. No general directions can here be given; the wants and means of the school will have to be consulted in making out the order. The teacher ought, however, always to give the precedence to the apparatus to be used by the students in the Laboratory Practice, if the means of the school do not permit the purchase of this necessary apparatus and the more costly apparatus also This simple apparatus required for the demonstration of the Fundamental Laws of Electricity (see 341 to 372), is more important to the student, and therefore to the school. than the more expensive and more powerful siachines (373 to 380); that is, the simple apparatus for students' experiments must be obtained first; the fine electrical machines and batteries should thereafter be procured as soon as possible. The necessary apparatus for Student's Laboratory Practice is divided into two distinct groups, viz.: I. Apparatus placed at convenient points in the Laboratory, to be used by students in general; II. Sets of Apparatus, put up in a separate tray, of wood or pasteboard, sufficient to demonstrate any given article in the book. (See article 492 in the Elements of Pliysics.) Every piece of apparatus should be labeled. (See El. Phys, 495-'96.) Below, the principal fixed'apparatus for general use is enumerated. A few sets for the demonstration of separate articles have been added, simply to serve as examples. A full enumeration of all the sets required would demand too much space. I.-APPARATUS FOR GENERAL USE. 7. Meter Rods, of wood or brass, sev- 11. Graduated Cylinders, several, viz: eral, labeled No. 1, No. 2, etc. 100 c.c. divided to 1.0 c.c. Decimeter Rules, of card paper or 50 " " "0.5 " brass; a great number; to be 10 " " " 0.1 " distributed with the sets (see Of the last a considerable number II); also called Centimeter is required for the several sets Scale II. Meter Tape, 10 meters long. 15-21. Balances and Weights: 10. A Twenty-five Cubic Centimeter a Druggists' Counter Scales-set Flask. of Weights 0.1 gr. to 1000 grms., A 100 ditto. mainly for work in Chapter II. 230 E. B. BENJAMIN''S DESCRIPTIVE CATALOGUE APPARATUS FOR HINRICH'S PHYSICS.- Contnued. b Druggists' Prescription Scales- 136. Aspirator. set of Weights 0.1 to 50 grms. 148. Mortars, of Porcelain and Agate. c Ditto, with Weights 0.01 to 50 259. Astronomical Telescopes, Achro. grms.; with Equipoise for one matic. scale-pan, for use as Hydrostatic a Common, power 5 to ]0. Balance. See 123. b* Larger, mounted (best equa(Larger Laboratories require 8ev- torially), power 16 to 64; objeceral of each of these three bal- tive 6 to 10 cm. diameter. ances.) 277. Opera Glass. 35. Protractors, brass, horn; a con- 281 Microscopes. siderable number, both for sets a Common, imported, cost about ill ~ vi, Chap. III, and ~ iv Chap. $20.00. I. b* Large, bulbs, more powerful. 36. Goniometers; a considerable num- 286. Micrometer, on glass, I mm., in ber, for sets in ~ vi, Chap. III. 50 parts. 37. A Good Pendulum Clock. 288*. Microscope, with Polarizing Ap38. A Simple Second Pendulum; me- paratus, for observation of mitallic bob and double iron wire. croscopic crystals (290). (School Lab., 1871, plate 3, fig. 301. Horse-shoe Magnet, strong, with 6, upper pIendulum.) Keeper. 131. Baroilleter Scale, English inches, 323. Lodestone, in box, with iron filto 0.01 inch. Convert to mm., ings a:nd nails. by Table, p. 167. 327. Compass. II.-SEPARATE SETS. Each set, as far as possible, put up in a separate tray; all pieces labeled. (See article 495). 12. Volume -of One Drop of Water- tangular Block of Cork; 4. Rec1. Tube Pipette; 2. Graduated tangular Piece of Lead; 5. Cylinder, 10 c.c. to 0.1; 3. Bot- Sandstone; 6. Limestone; 7. tle for Distilled Water. Centimeter Scale. 13. Test Graduated Cylinder- 1. 29. Specific Gravity of Liquids —1. Graduated Cylinder, ]0 c.c. to Graduated Cylinder, 10 c.c. to 0.1; 2. A One-cubic Centimeter 0.1; Bottles contain'g: 2.Water; Pipette; 3. Bottle for Water. 3. Alcohol; 4. Gasolene. 14. Mensuration of Volume of Ves- 30a. Specific Gravity of Solids Insolusels-1. Graduated Cy linder, 50 ble in Water-1. Graduated Cylc.c. to 0.5; 2-3. Two Test Tubes; inder; 2. Bottle with Water; 4. Beaker; 5. Flask; 6. Porce- Specimen Tubes with Fragments lain Dish; 7. Cenltimeter Scale. of, 3. Galenite; 4. Gypsum; 24. Determine Weigllt of U. S. Coins 5. Iron (nails); 6. Lead (shot); — 1. Half Dollar; 2. Quarter 7. Sulphur; 8. Anthracite. Dollar; 3. Dime; 4. Five Cents, 306. Specific Gravity of Solids SoluNickel; 5. One Cent, Copper. ble in Water-1. Graduated As 24h, c, etc., similar Lots of Cylinder; 2. Bottle with GasoForeign Coin may be put up lene; Specimen Tubes with: separately. 3. Crystals of Nitre; 4. Crys28. Specific Gravity of Rectangular tals of Blue Vitriol: 5. Crystals Solids-1. Tablet of Wood; of Alum. 2. Prism of Wood; 3. Rec3534.-Set of Apparatus, Quantitative, to he Qealt out to each Student, as recommended by the School of Mlines, Columbia College, New York City. $47.50 2 Bunsen's Burners, 2 Test Tubes, 7 in., 2 Rubber Tubes for ditto, 2 ft. each, 1 " 8 " 2 Iron Ring Stands, 1 Nest of 6 Beakers, plain, 4 Filter Stands, 3 " " lipped. I Test Tube R;lck, 3 Funnels, 1i in., 12 Test Tubes, 4 in., 5 " 2t " 12 " 6 " 2 " 31 " OF CHIEMIICAL AND PHYSICAL APPARATUS. 231 STUDENTS' QUANTITATIVE APPARATUS.-Continued. 1 Funnel, 4 in., 1 File, 1 " 5 " 2 Steel Forceps, 1 Wash Bottle, pilnt, I oz. Bichloride of Platinum, Solu1 " 8 oz., tion, 1 " 4 oz., 6 " Nitrate of Silver, 3 Convex Covers, 3 ill., B2 Bottles for ditto, 3 " 4 2 " corked, 10 oz., 3 " 5" 2 " " 8"S 3 Ground Glass Covers, 3 in., 2 " " 4 ":1 " ",, 4" 4. " " 1 " 3 " " " 5 " 2 Sand Baths, 6 Watch Glasses, 4 Wire Triangles, 2 Cllloride of Calcium Tubes, 2 Towels, 1 Flask, I oz, for Carbonic Acid, 1 Scissors, 1 doz. Specimnen Tubes, 3 in., 1 Test Tube Brush, 2 Dessicators, 1 Horll Spatula, 4 ill., 2 Glass Tubes, 1 Package Cut Filters, 3 in., 2 Gltass Rods, 1 " " 4 ":3 Porcelain Crucibles, 1 in., 6 Sheets Swedish Paper,,2 ". 1 " 1' Glazed 1 Nest of 6 Evaporating Dishes, I Set Filter Patterns. 2 Casseroles, 4 ii., 1 ft Rubber Tubing, 6_ in., 1 Porcelain Mortar, 4 - iu., 2 Pieces Wire Gauze, I Blow-pipe, 1 Copper Water Bath, 2 ft Platinllun Wire, 1 Rat-Tail File, 2 Platinum Foils, 1 Watch Glass Clip. 3535. —Set of Apparatus, Qualitative, to be dealt out to each Student as recommended by the School of Mines, Columbia College, New York. $24.00 1 Bunsen's Burner, 1 Blow-pipe, 1 Rubber Tube for ditto, 2 feet, I Foot Platinum Wire, 1 Iroll Ring Stand, 1 Platinum Foil, 2 Filter Stands, I File, 2 Test Tu be Racks, 1 Steel Forceps, 24 Test'Tubes, 4 in., 1 oz. Bichloride of Platinum, Solut'n, 24 " 6 " 6 " Nitrate of Silver, 2 " 7 " 2 Bottles for ditto, 1 " 8" t2 " corked, 1 oz., 1 Nest of 6 Beakers, plain, -2 Sand Baths, 2 Funnels, 1 in., 2 Wire Triangles, 2 " 2 " 1 Towel, 1 Wash Bottle, pint, I Scissors, 6 Watch Glasses, 1 Test Tube Brush, 1 Flask, 4 oz., 1 IIorni Spatula, 4 in., 2 Glass Tubes, 2 Packages Cut Filters, 3 in., I Glass Rod, 2 " " 4 2 Porcelain Crucibles, 14 in., I Foot Rubber Tubing, -, in., 2 " 1 " 1 Piece Wire Gauze, 1 Nest of 6 Evaporating Dishes, 1 Deflagrating Cup, 1 Porcelain Mortar, 44 in., 1 Blue Glass. 232 E. B. BENJAMIN S DESCRIPTIVE CATALOGUE HOFFMAN'S APPARATUS. 3536 3537 3538 3539 3540 3541 3542 3543 Apparatus which may be Used to Illustrate Hoffman's MIodern Chemistry. Most of these Forms are constantly on hand, and all the Joints are carefully sealed and Stop-cocks groound in the most careful mannier. 3536. lHoffman's Glass U Tubes, 16 inches (a), with plain bent Tube sealed in below.... $1.00 3537. Ditto, ditto, ditto, ditto, 16 inches (b), with Platinum Electrodes sealed into the top of one of the Tubes......................... $1.2 3538. Ditto, ditto, ditto, ditto, 16 inches (c), with plain bent and inlettubes.-.-... ——........ —-- $1.00 3539. Ditto, ditto, ditto, ditto, 16 inches (d), withl Platinum Electrodes sealed into the top of one of the Limbs. $1.50 3540. Ditto, ditto, ditto, ditto, 16 inches (a), with deliver-cock at the base of one of the Tubes. -...$2.00. L _I f 3541. Ditto, ditto, ditto, ditto, 16 inches (b), with delivery-cock at the base of one of the Tutbes, and Platinum Electrodes sealed into one of the Limbs................... $2.50 3542. Ditto, ditto, ditto, ditto, 16 inches (c), with glass outlet-cock and waste-cock at the top of one of the Limbs $3.00 3546 3549 3543. Ditto, (ditto, ditto, ditto, 16 inches (d), with glass outlet-cock and waste-cock at the top of one of the Limbs, and Platinum Electrodes sealed into one of the Limbs.-.-............................................ $4 00 3544. Hoffman's Lecture Endiometer, mounted on stand, complete................................................................ $l5.00 OF CHEMICAL AND PHYSICAL APPARATUS. 233 HOFFMAN'S APPARATUS.-ConfinUed. 3545. Hoffman's Apparatus, for Recomposition of Water, consisting of three Eudiometers, mounted on stand, each provided with a Delivery Cockof glass, and two ofthem with cocks in the top................-.............. $15 00 3546. Ditto, ditto, for the Decomposition of Hydrochloric Acid in Hydrogen and Chlorine; of Water int,) Hydrogen and Oxygen, and of Ammonia into Hydrogen and 3550 3554 3556 Nitrogen, consisting of a V-shaped Tube, with Platinum Electrodes, mounted on stand.............................................................$6.00 3547. Ditto, ditto, ditto, ditto, unmounted.~.............. 2.50 354S. Ditto, ditto, for the Illustration that the Gas evolved from Hydrochloric Acid by the Electric Current contains equal volumes of Chlorine and Hydrogen, unmounted................................................ $3.00 3549. Apparatits, for Demonstration of Oxygen, Hydrogen anud Water, consisting of U Tube, mounted on stand, supplied with Stop-cock Delivery Cock and Glass Worm, complete...........$15.00 35$0. Ditto, for ascertaining the exact proportions of Hydrogen and Nitrogen in Ammonia, unmounted.$.................. $ 3.00 3.551. Metaclic,?tpports for the above, and other similar apparatus, each................................................................. $4.00 3~552. Hoffman's Apparatuts, for the Demonstration of Proportion, ate volumes of Water, Hydrochloric Acid and Ammonia, consisting of Ui Tube with Stop-cocks at top, Pinch-cock at bottom, with Platina Electrodes, n-ounted on stand, No. 913..._.$10.(0 3553. Ditto, ditto, for the Determination of Chlorine Water, consisting of IT Tube, with fine ground glass Stopper at the top, and having also Platinum Electrodes on arm, No. 259, mounted...........$7.00 3554. Ditto, ditto, for the Testing of Sulphuric Acid, consisting of a long glass -vessel or bottle, into the neck of which is ground stoppered with fine emery, a Glass Tube running about half way down the bottle, and bent at right angles at the top. Out of the shoulder of this bottle projects a Tube, having two fine ground glass Stop-cocks, with a bulb between them; the whole is firmly fixed by a cork into a strong cylindrical glass receptacle, having a flat bottom................-......................................$7.-,0 3555. Ditto, ditto, Four Burners, mounted on one stand, each Burner about 2 inches apart.................................................. $7.50 1755. Hoffman's Watch Glass Clamps, each -............20 3556. Hoffmanss Apparat'sn, for the Decomposition of Water, consisting of three Way Tubes, with two glass Stop-cocks for delivery and one large bulb in the Supply Tube, with Platinum Electrodes sealed in and communicating with the strips of Platinum Foil, unmounted.............. $6 50 3557. Ditto, ditto, ditto, mounted.............................$10.00 355S. Ditto, ditto, with Charcoal Points for the Electrolysis of Hydrochloric Acid and Ammonia, mounted.................................. $15.00 234 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. HOFFMAN'S APPARATUS.-COntinUed. 3559 3559. Apparatuq, for Volumetric Electrolysis of Carbonic Acid Gas, Water and Ammonia, through one Electric current, consisting of two Three Way Tubes with two glass Stop-cocks with Carbon Electrodes and one Three Way Water Decomposing Apparatus, each separately mounted, with special Binding Screws. All the above having largeglass Bulbs..... -........$30.00 3560. Ditto, ditto, for the Arrangement of Combustion Experiments, consisting of a large glass Tube drawn at the upper end and bent at right angles, into which is secured a glass Stop-cock, connecting with a rubber Tube delivery into the lower or open end is fitted, by means of a rubber stopper, a tube of medium width, into which is secured a glass Stop-cock tube with a burner of Platinum Foil in the end. There is also a blowing tube, bent at right angles, fitted into the same rubber stopper...............................- $10.00 3561. foffmanu' Apparatus, for showing the principle of Carre's Ice Freezer, by producing ice from.n water by the employment of Ammonia.$15.00 3562. Ditto ditto, for the condensation of the Elementary Gases, Hydrogen and Oxygen, in water, at boiling temperature, as well as for Eudiometric Analysis of the Fire Damp and the oil forming gases (as per Hoffman's Modern Chemistry, Fourth Edition; also per Records of the German Chemical Society, 2d Vol., p. 245), consisting of an Iron Stand with Toothed Bar, in which is secured a long glass tube, supplied with Platinum Electrodes, and fastened in a brass support, which can be easily moved up and down..........$30.00 3563. Ditto, ditto, for burning Sulphur by the Electric Current, demonstrating equal volu es of Oxygen and Carbonic Acid Gas, also Sulphurons Acid formed from it; consisting of an IU shaped tube, with a large bulb near the top, which is stoppered with a two-holed cork, and provided with a Wastecock. In each hole in the cork is a wire fastened, one of which is provided with a small spoon to receive Carbon, or Sulphur. The upper ends of the wire are supplied with Binding Screws. (See illustration, p. 236.)..... $12.50 3564. Ditto, ditto, to observe the ratio of volume of Simple and Compound Gases under the influence of pressure and changes in the temperature -(Per Hoffman's introduction to his work on Modern Chemistry, and Records of the German Chemical Society, 2d Vol., p. 257), consisting of a long U formed glass tube, ending in four vertical branch tubes in the shape or a fork and supplied with glass cocks. The apparatus is careflly' held in place by a nicely constructed support, which sustains four glass cylinders, fastened in OF CHEMICAL AND PH YSICAL APPARATTJS. 235 HOFFMAN'S APPARATUS.-Continued. place with metal spring caps, which envelope each branch tube. These caps are so arranged that they may be connected with a Steam-boiler by means of a metal pipe........$5................0.00 3563 3562 3564 3565. Hoffman's Steam- Tight Determzination Apparatus, consisting of. a Barometer Tube, 1 Meter long, graduated in * Centimeters, and secured with a middle sized cork into a middling wide encasing tube. The latter is drawn small at the top, in a right angle, which terminates in a boiling vessel, supportedo n an iroaL stand, over a lamp flame of 3 tubes. Out of the lower end of the encasing tn be runs a tube connecting with a condensing tub. The graduated tube descends into a Mercury trough, out of which also runs a nleasuring tube, graduated by a " Nonitns" graduating screw, showing the volume by the pressure of the quicksilver. 3566. Murrle's Distilling Apparatus. (See Ill., p. 237.) For either Chemical Laboratories, Polytechnic schools or Provisional Assay offices. Com 236 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE Hoffman's Steam-Tight Determination Apparatus. 3365 MURRLE)S DISTILLING APPAPIATtUS.-Contifnued. plete, ready to set into brick. The condensation of steam takes place in the cooling tub, generally; a large Sand Bath accompanies the apparatus, which can be heated at the same time and with the same fire in the hearth, in which case -the cooling tub must be placed elsewhere. The length of this apparatus is 6Q feet, depth 3 feet. The separate parts of this apparatus are: 1 Copper Steam-boiler, tinned illside; 1 Cooling Tub with cover and level tubes; 1 Filling Funnel; 2 large Caps with ball Stop-cocks; 5 small ditto; 1 Tin Alirnentary Feeding Tube; Glass Water Gauge; Copper tinned Steam Drying Box, with 15 compartments; 1 Steam-pipe, running from the Steam-boiler to the Drying Box; 1 ditto, to the Cooling Tub from the Drying Box; I Winding Tube; Detaining Pins; Filtering Funnel, with Binding Tubes; 3 Intermediary Stop-cocks on the Steampipe; 3 Dogshead Stop-cocks for the Steamboiler; Drying Case; Cooling Tulb; Steam-boiler Plate (2 entire); Pedestal for the Cooler; Board for the Drying Case; 2 Props for ditto; Fish-bellied Roast, etc., etc. OF CHEMIC4L AND PHYSICAL APPARATUS. 237 MUIRBLE'S DISTILLING APPARATUS.imported only to order. (For description, see pp. 233,'36.) 31566 3507 Distilling apparaltus', with Adjuncts, according to Dr. Moiohr, consisting of: 1 Distilling Alenibic of 2 gals.; Water Jacket., Steam-pipe, Neck; Angular Condensing Tubes; Steam-pipe, with Transverse Stop-cock; Condenser for distilling water; large and small Detaining Pins; Alimentary 4~~~~~~Z r 4!E! Feeding Pipes; 2 Apparatus Boxes of 24 oz.; 1 ditto,mof 12 oz.; I ditto, of Emilian shape, of 24 oz.; 2 Faucets; Steam-pipe, with Intermediary Stopcocks from the Cap into the Steam-pipe which conducts the distilled water into the Cooler; Casseroles, with cover, 31 qts.; ditto, of EmiEan, of 2 qts.; 2 Intermediary Stop-cocks; 2 - Dogshead Stop-cocks on the Steam-boiler and 3567 3568 Cooling Tube; 1 little Stop-cock on the Cap; Brass Connectors, hermetically sealed on the Apparatus, Tubes and Faucets; Copper Steam-boiler of 30 qts.; Cooling Tab ot 125 qts.; 2 level Tubes with Funnel; Glass Water Gauge; Cap of one of the Evaporating Dishes; Front Plate; Covering Plate; Side Frame; Hot-air Passage; Fish-bellied Roast; Iroa Steam-boiler Plate; Little Ring Plates on the Cap; Wooden Pedestal; Knob, Feet and Binding of the Crank Hands; Brush, Plaster Model, etc. 238 E. B. BEN-JAIIN' S DESCRIPTIVE CATALOGUE 356S. Distilling Apparatus, Dr. Mohr's, together with 1 Dry Box, 1 2-gal. Still, Water Jacket, Steam Tube, Neck, Angular-shaped Worm, Steam Tube, with Iutermediary Stop-cock; Worm for distilling water; Alimentary Feeding Pipe; 2 Apparatus Boxes, a, 24 oz.; I ditto, of 12 oz.; 1 ditto, Emilianl, of 24 oz.;'2 Faucets; Steam Pipes, with Intermediary Stop-cock, running from Steam-boiler to the Cooling Tub and Drying Box; little Stop-cock on Cap; Brass Connectors, hermetically sealed; Steam-boiler, of copper, of 30 qts.; Cooling Tub of 125 qts.; 2 Level Tubes, with Funnel; Glass Water Gauge; Cap of one of the Casseroles; Steam Drying Box, with two compartments with two perforated shelves; Front Plate; Covering Plate; Side Frame; Hotair Passage; Fish-bellied Roast; Iron Steam-boiler Plate; Wooden Pedestal; Little Rinlg Plates on the Caps; Knob, Feet and Binding of the Crank Handle; Brush, Plaster Models, etc. 3569 is of a construction similar to 3568, only with smaller dimensions, its depth being a space of 2 ft. 4 in., and, in its front, inclusive of a space under the Cooling Tub (to place Flasks) is 4 ft. 5 in., uad it consists of 1 Distilling Alembic, with Cover, of 6 qts.; Water Jacket; Steam Pipe, with Intermediary Stop-cock; Cooling Tubes for distilling water; 2 Detainining Pins; Alimentary Feeding Pipe; 2 Apparatus Boxes of 1 - oz.; 1 ditto of 6 oz.; 2 Faucets; Steam Pipe, with Intermediary Stop-cock, from the Cap.into the Steam Pipe which conducts the distilled water into the Cover; Casseroles, wvil Cover, of 1 qts.; 2 Intermediary Stop-cocks; 2 Dogshead Stop-cocks on Steam-boiler and Cooling Tub; little Stop-cock on Cap; Brass Conductors, hermetically sealed; Copper Steam-boiler of 18 qts.; Cooling Tub of 60 qts.;'2 Level Tubes, with Funnel; Glass Water Gauge; Cap of one of the Casseroles; Front Plate; Cooling Plate.; Fish-bellied Roast; Steam-boiler Plate; Pedestal on the Tub, with Stationary Screw i Knob, Feet and Binding of the Crank Handles; Brush, Plaster Model, etc. In addition to the foregoing illustrated styles, I have facilities for importing others similar in character. 3571. —BUNSEN'S APPARATUS, for GAS ANALYSIS. 1248a. Absorptiometer, for Measuring the Absorption Power of Gases $50.00 2410. Gasometer, Bunsen's, Mercurial Graduated Millimeters.-...... 2 75'888. Gas Photometer, Bunsen's, 5 feet long, carefully registered scale with sliding and reflecting screen, complete, as used in the University of Heidelberg, with gauge.................................................... $30.00 2411. Gas Meter, with Exposed Indices, showing tens, hundreds, and thousands Pressure Indicator Regulator, and Delivery Jet........$50.00 2859. Gas Regulation Burner...................... 5.00 3572. Ditto, Regulator, Kemp's, ordinary.............................. 3.50 2413. Ditto, with Bunsen's new improvement........................ 4.00 2407. Gas Tubes, registered in cubic Centimeters.. $...... L.2. 5 to 2.50 2418. Ditto, 5 cubic inches, in tenths, each..... 1.75 2417,'18. Ditto, or Absorption Tubes, lipped, in Millimeters....$1.75 to 2.50 1407. Ditto, Syphon Barometer, engraved scale, with support...,...15.00 3572. Apparatus, for the Determination of Sulphur by Chlorine.. 7.50 3573. Ditto, for preparing Nitrogen by Chlorine and Ammonia, consisting of Glass Flask, Receiver, Delivery Tubes, Support and Burner..........$7.50 3574. Ditto, for the Determination of Nitrogen, after Dumas........5.00, 3575. Ditto, for preparing Nitrous Oxide. consisting of Gas-burner or Lamp, Woulf,'s Bottle, Gallows Screw Connector, fitted with Mouth-piece and Stopcock, bent Tube with Connector, Pint Retort and Receiver, and Lamp Stand of iron...........$12.00 3576. Ditto, for combining the Gases requisite for forming Exhilarating Gas, consisting of Bell and Receiver, each with ground edges, between which is placed a Plate of Glass, ground on both sides............................$2.50 33577.. Ditto, for generating Chlorine Gas, consisti:ig of Lamp, Pneumatic Cistern, Iron Stand, Flask, Sand Bath, etc.......$.... $10.00 357S. Ditto, Deflagrating, for making Anhydrous Phosphoric Acid by burning Phosphorus in Oxygen.......50.........................$3.50:3579. Ditto, consisting of Carboys of Earthenware, with Filter for generating Chlorine. OF CHEMICAL AND PHYSICAL APPARATUS. 239 35SO. Apparatus for preparing Nitrogen by burning Phosphorus in air, $3.50 3591. Ditto, to illustrate the Diffusion of Gas...................... 2.00'2189. Ditto, for showing Enlosmlosis..... 150 3582. Ditto, to illustrate the Formation Qf Chloride of Ammonia by condensiiig the vapors of Hydrochloric Acid alrd'Ammonia, consisting of a Glass Flask holding one gallon, to which are attached two Tubes by means of an India Rubber Conneclion..................................-...........$2.50 3533. Ditto, for making Chloride of Sulphur, consisting of two tubulated Receivers, Chloride of Calcium Tube, Bulb Tube, Gas Flask, etc., after Mitscherlich.. $...7.00 3584. Ditto, Mohr's Ether Extraction.......$8.00 (See also list of Hoffman's Apparatus.) 3585. Ditto, Bunsen's, for obtaining pure Hydrogen Gas. -6.50 3585 3586 3586. Ditto, ditto, for obtaining pure Oxhydrogen by the Decomposition of Water... $6.50 2419. Porcelain Apparatus, for Washing Gases, consisting of two deep Porcelain Dishes, fitting into each other with concentric Chambers, Receiver and Vent.............................................................. $5.00 3463. Woulff's Apparatus, for Washing Gases, 8 oz............ 5.50 Ditto, ditto, ditto, ditto, ditto, pints..7.00 "Ditto, ditto, ditto, ditto, ditto, quarts.......................... 8.00 1602. Lamps, suitable for the above, each..... 1.25 3239. Iron Support for ditto... 1.50 1731. Apparatus, for Generating Chlorine, Safety Funnel and Delivery Tube, Quart Flask....... $1.35 2396,'97. Ditto, for Sulphurreted Hydrogen, large size, 2 Bulbs, Kipp's, $6.00 to 7.50 2401. Ditto, ditto, smaller, Babo's................................... $1.00 2194. Ditto, for the Extraction of Ether, 1 gal...... 14.00 2022. Ditto, for Displacenlent, after Guibourg........................ 12.00 2019. Ditto, for the Extraction of Ether, small, or Displacement Apparatus. 75 3406. Bottles for Washing Precipitates, Faraday's pints...............50 " Ditto, ditto, ditto, ditto, quarts..................................75 2233. Evolution Flask, complete....................................1.25 Gas Bottles, with Receiving and Delivery Tube...................75 2402. Hydrogen Generators....................$5 00 to 40.00 2405. Oxygen ditto, quarts......... $4.50 " Ditto, ditto, j gal-...............6.00 2407. Pepy's Gas Holder, of Copper, 10 gals........2.................7.50 " Ditto, ditto, ditto, ditto, 15 gals................................37.50 2406. Ditto, ditto, Japanned Zinc, 10 gals............................2.50 " Ditto, ditto, ditto, ditto, 15 gals...........................27.50 BRADLEYS APPARATUS FOR ELECTRIC MEASUREMENT. 35,70 3570. Bradley's Apparatns for Electric Measuremrent, for ac- For determining the specific condlctivity of metals, especially curately determining the electro-motive force, resistance anl of copper, a matter of great importance to those manufacturing e strength of batteries. For directly measuring-the resistance of or using wire for telegraphic or other electrical purposes, and all conductors of electricity, telegraph wires, etc., from the — L of in short, the capacities of all other instruments for similar purposes an ohm to -y -f ohms. For determining the insulation resistance combined are embraced in thi8 one, in a substantial and compact of telegraph lines up to millions of ohms. For locating breaks, form, convenient for transportation, and comparatively safe from faults and crosses on telegraph lines, cables, etc. For determin- injlry. Its operations are exceedingly exact, and ill nowise ing the qua.ntity of metal of any kind deposited in a given time complicated or difficult. Descriptive Pamphlets nlay be had on in the process of electroplating, gilding, etc. application. Price, each, $'200 DF CHEMICAL AND PHYSICAL APPARATUS. 241 APPARATUS FOR HEAT. 3587. Apparatus, for showing Specific Heat..-.. —..,,.. i 00 1828. Conductometer-................-...-.............2.50 3588, Apparatus to show Spheroidal State of Liquids, as per No. 52 of Tyndall, on Heat -............ —.......$2.00 35S9. Trevelyan Rocker, according to Tyndall, Fig. 27....... —. 6.00 3590. Straight Roller, Electrical, according to Tyndall, Fig. 30...... 8.00 3591. Elliptical Roller, according to Tyndall, Fig. 31...- -10.00 3692. Apparatus, to show Influence of Pressure at Boiling Point, Fig. 35 —--------- ------ --------------------- ---------------- 8.00 3593. Ditto, showing Development of Heat by Compression of Air, Fig 13, $4.00 1779. Bunsen's Furnace, for Organic Combustion, imported, 25 Burners 60.00 1780. Ditto, domestic, 25 Burners.......................... 50 00 3594. Ditto, 18 Burners.... —-. —-----------—. 40.00 1781. Ditto, 10 Burners................... 30.00 3595. Sefstrom's Chemist's Forge, imported to order.. -.. 175.' 0 1476. Blow-table and Blast-pipes.. —-........... —----------—... 40.00 1778. Liebig's Combination Furnace, 24 in., $3.25; 18 in.... 2.23 1809. Ditto, Condensers, Glass, small............................... 1.00 1811. Ditto, ditto, Japanned Tin.....0....... 3. 1812. Ditto, ditto, Brass, soldered................................... 6.50 1813. Ditto, ditto, ditto, brazed..................................... 10.00 3599 3603 3605 3596. Carre's Ice Freezer, imported to order.1.-.. — -—... —--- 150.00 2992. Pulse Glasses, carefully packed in pasteboard case, each -.......50 2190. Eolipile, or Ether Jet..........................................50 3597. Parabolic Reflectors, with Iron Balls, Support and Stand of Brass, 10 ill................................................................ $12.00 2878. Ditto, ditto, ditto, ditto, 13 in................................. 16.00 " Ditto, ditto, ditto, ditto, 15 in....-.. 25.00 2879. Ditto, ditto, ditto, ditto, ilickelized, 10 in...................... 15.00 Ditto, ditto, ditto, ditto, ditto, 13 in..... 19.00 " Ditto, ditto, ditto, litto, ditto, 15 in........................... 28.00 The Nickelized Reflectors are not easily corroded, and retain their polish. 2529. Psychrometer, August's, wet and dry bulb, mounted. $12.00 3304. Differential Thermometers, Leslie's, each....................... 2. 0 3598. Radiator, Leslie's, each...................................... 2 50 3004. Pyrometer, Three Metals, ordinary. -. —----. —---—.. —-—. 6 00 3005. Ditto, ditto, ditto, extra fine, with Brass Revolving Alcohol Holder. $12.00 3599. Brass Ball and Gauge Ring, wooden handle, sho-wing Expansion and Contraction, per pair --...:.. —----—.- $3.25 1808. Compound Bar, showing Unequal Expansion................... 1.00 242 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE APPARATUS FOR HEAT.- Continued. 1827. Apparatus, for showing the slow Conduction of Heat downwards by Fluids........................................................ $2.50 2268. Glass Fire Syringe, with Tinder, 10 in. long....................... 8.00 1347. Flameless amp...................... 1.50 1960. Davy's Safety Lamp, for Miners, etc...... 7.50 2422. Wire Gauze, in frame............. -....... 75 1912. Cryophorus, Wollaston's, double bulb.......................... 2.00 1913. Ditto, ditto, single bulb -........................... 1.75 2527,'28. Hygrometers, Saussure's.................... $4.00, 8.00 and 12.00 2526. Ditto, Mason's....................... 4.50 3306. Maximum and Minimum Thermometers........................ 4.00 3310. Metallic Thermometers, Watch Form........................... — 20.00 1290. Air ditto.....................................-.................25 3415. Water Hammers.............................,,.............75 2563. Brass Jets, for Burning Gases...................................50 2564. Ditto, ditto, ditto, with Stop-cock and Flat Tip-2.00 1791. Combustion Tubes... 40 to.50 3306. Day and Night Thermometers.............................. 4.00 1477,'79,'80,'81. Oxhydrogen Jets-.$4.00, 10.00, 15.00 and 20.00 each. 1649. Candle Bombs, per doz......................................... -30 3600. Hygrodeik, Edson's, for ascertaining the sensible Temperature due to Evaporation, the actual Humidity, Dew. Point and absolute amount of Moisture............................................................ $1.00 APPARATUS for HYDRAULICS AND HYDROSTATICS. 3601. Model of Forcing Pump, complete........................... $20.00 3254. Tantalus Cup................. 2.00 3620:! Il F' 2098 3606 3619 - 3629 3602. Archimedes Screw -.. 5.00 3603. Equilibrium Tubes, a set of 6............................... 3.50 2098. Hiero's Fountain, of Glass...................................... 18.00 3604. Barker's Mill, plain......................................... 6.00 3605 Ditto, ditto, with Stop-cock................................... -10.00 1686. Hydrometer Jar, with Balloon Car....................... 1.50 to 5.00 2524. Nicholson's Hydrometer ---—...................................... 6.00 3606. Archimedes principle, Brass Cup and Cylinder.......... 3 50 to 6 50 2461, 2520 Hydrometers, various............................... 75 to 2.00 2544,'44. Ditto, Jar, Glass Foot, with or without Lip........... ].00 to 2.00 - Specific Gravity Balance............... 15.00 to 20.00 OF CHEMICAL AND PHYSICAL APPARATUS. 243 APPARATUS FOR HYDRAULICS AND HYDROSTATICS.-Continued. 1684. Cartesian Imps..........20 to $1.50 3247. Glass Syphos.............................................. 50 to 1.50 3607. Wurtemberg Syphons........................................00 360S. Diving Bell................................................ 6.50 2994. Forcing Pump, of Glass....................., 1.50 2993. Lifting Pump, of 11.50 1656. Capillary Tubes and Pan............... 2.00 ]654. Ditto, Plates, with Pan, to show the Parabolic Cutve...... 2.00 3609. Apparatus for showing the Principle of Archimedes Screw, consisting of Archimedes' Screw, mounted on Wheels. When the Rod holding the Screw is swiftly revolved, the machine will be propelled.........$10.00 APPARATUS FOR MAGNETISM. 3610. Electro Magnet..50 3611. Ditto, ditto, on Stand, to lift Weights.16.00 2126. Ditto, ditto, Revolving, Page's................................. 8.00 3622 3625a 2624 3632 3612. Circular Magnets, with Ring.475 3613. Helix on Stand. 4.50 3614. Contracting Helix.............. 6.00 3615. Voltaic Pistol.. 4.00 2647. Horse-Shoe Magnets, 3 in....................................... -30 Ditto, ditto, ditto, 3 in........................................60 " Ditto, ditto, ditto, 4 in.........................................75 " Ditto, ditto, ditto, 4 in....75 Ditto, ditto, ditto, 6 in..................1....25 " Ditto, ditto, ditto, 10 in. 4.50 Ditto, ditto, ditto, compound......................... 4.00 244 E. B. BENJAMIN'S DESCRIPTiVE CATALOGUE APPARATUS FOR MAGNETISM.-Continued. 2646. Magnets, Single Bar.................................$1-.00 2649. Ditto, Pair, with Armature.................................... 3.50 3616. Ditto. ditto, ditto, Wheel Armature-........... 3.25 2650, 1,00. Magnetic Needle, on Stand........................ $1 75 to 2.. 0 261.' Dipping Needle................................. 2.00 3617. Adhesion Plates........................................... ——.. 1.50 3618. Lodestone, according to size...................... 50 and upwards 3619. Gassiot's Cascade..................................$2.50 (See also Electricity, in regular Catalogue, under E.) APPARATUS FOR MECHANICS, Made only to Order. 3620. Inertia Apparatus......................................... $250 177-2 Collision Balls, Lignumvitme, set of 5........................... 3.50 3621. Centre of Gravity, set of 8......... 11.00 3622. Leaning Tower.... 1.25 3623. Whirling Table and Accessories............................... 33.00 3624. Centrifugal Forces, per set...................................1'2.0 3625. Illustration of Weights and Pulleys...-33.00 I TI 3625 3626. Screw on Mahogany Frame.................................. 6 00 3627. Sets of Sulids 5.00 3628. Dissected Cone-.........................50 3629. Gyroscope.8.00 3630. Atwood's Fallingu Machine.............$75.00 to 150.00 3631. Apparatus, Brass, showing the principle of the Reverbal Balance. $15 00 3632. Inclined Plane 4.00 OPTICAL APPARATUS. 2168. Duboseq's Electric.amp.....................................$400.00 2169. Serrin's, ditto, litto................ —--------------- --— 45000 2640. Magic Lantern, German..........-2................ 25.00 2639. Ditto, ditto French, each......................$6.00, 10.00 and 25.00 OF CHEMICAL AND PHYSICAL APPARATUS. 245 OPTICAL APPARATUS.-Continued. 3633. Illustrations on Glass, for Magic Lanterns (Fancy Illustrations), per set....$........................................ $.00 to 10.00 3634. Electric Lamp, by clock-work. made to order...............$150.00 3035. Ditto, Lantern.............................................. 50.00 2607. Magnesium ditto.....................................,...... 25.00 2608, 26 i 2. Oxhydrogen Calcium Light.......... $7.50 to 25.00 2613. Carbon Points, mounted....................................... 20.00 3636. Ditto, ditto, ditto, with Reflector........................... 25.00 3637. Ditto, ditto, ditto, in Lantern............................... 27. 0 363S. Ditto, ditto, without Lenses and small Reflector............. 30.00 1679. Ditto, Pencils, per inch.......................................06 3639. Spectroscopes, Duboscq's, imported to order................210.00 3139. Ditto, Browning's, 2 Prisms.................. -...160.0O 31:38. Ditto, Heildelberg, single Prism, with 2 Lamps, 2 IIolders, 12 Platina Ends. -----------......... —. —----—....... —-----.$65.00 3136,'37. Ditto, Browning's, Hand... -$15.00 to 18.00 1728. Charts, showing the Spectra of Metals and Stars, translated illto English, each.-$..-.... $.............$3 50 3257. Merk's Telescope, High Power, with Strap for mounting on Stand. $30.00 2681. Gundlach's Microscope, 2 Eye-pieces, 5 Objectives, with Slides, etc., all in an elegant, highly polished case; a very superior article, comlplete. $200.00 2680. Nacht's Compound Microscope, French........................ 20.00 2678. Ditto, ditto, ditto, ditto.-........ 15.00 2682. Accurate Solar Microscope, complete, in fine box, hinged Cover, etc. $200.00 1768. Collection of Rare Specimens, for Spectral Analysis, with Platinum Wires on Glass Foot, and Stands to hold them, with Sliding Box........$7.50 2630. Watchmakers' Lenses......................................... 2.50 1769. Collection of Objects, for Solar Microscope, mounted............ 25.00 1871. Microscopic Covers, Circles, very thin, per ounce............. 4.00 1872. Ditto, ditto, Squares, per ounce................................ 3,00 2687. Ditto, Slides, assorted, per doz..................................50 26'29. Camera Lens, or Asplanat, by Steinheil........................ 30.00 2976. Set of 3 Hollow Prisms, mounted on Stand.....................30.00 3640. Ditto, Acromatic ditto, ditto, ditto............................30.00 3641. Single Rectangular, ditto, ditto..............................6.00 2973. Bottle Prisms..-....................................... $6.00 to 12.00 2988. Equilaterial ditto, 3.x:33 N. Y. in., each......................... 5.00 2983. Acromatic ditto, 30x27 N. Y. in., per pair....................... 5,00 2984. Ditto, ditto, 35x32 N. Y. in., per pair........................... 6 00 2985. Ditto, ditto, 40x,36 N. Y. in..................................... 7.25 2986. Ditto, ditto, 45x45 N. Y. ill..................................... 9.00 2981. Prisms, for Dark Ch;lambers, 15 Liines, each...................... 2.00 2982. Ditto, (litto, ditto, ditto, 21 Linrs, each-........................ 2.50 2974. Elegant Hollow Prism, Bisulphide of Carbon Prism, all the Joints fitted exactly, without flaw, blister or striated lines; a valuable gem for a Cabinet, anld madle by the celebrated Dr. Steinheil, of Munich.$50.00 2959. Polarization Apparats. s,Mitscherlich's, with Extr;l Tlube-.....60 00 3642. Model of the Human Ey,,, showing the Motion ----—.' 2.50 2234. Eye Model, showing the Reflection on the Eye Lens, with the use of Spectacles.......................................................... $15.00 2621. Magnify-ing Le: ses, for Assayers................................ 2.50 2631. Set of Glass Lenses, 6, for Demonstrations.................. 2.50 3643. Mirrors, Convex and Concave................................ 2.75 2632. Apparatus, for Defraction of Light............................ 7.50 2810. Ditto, for showing Monochromatic Light, 5 Burners............. 12.00 3109. Ditto, Hoffman's, for Invertinlg the Soda Flame........ $3.00 to 3.50 3644. Ditto, for showing the Oxidation of the Soda Flame-......... 2.00 3645. Ditto, IIoffnan's Flame Apparatus, with Arfgand Burner...... 5.00 2622. Lenses, Coddington.................................... 2 25 to 2.50 2623,'24,'25. Ditto, Stanhope, German Silver................. 2.00 to 3.50 246 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. OPTICAL APPARATUS.-Continued. 2526. Loups, single, 9 lines,.75; 11 lines, $1.00. 2627. Ditto, double..........................................$1.25 to 1.50 2628. Ditto, triple........................................ 1.50 to 1.7.; 2633. Apparatus, for the Recomposition of Light....................'2.50 2676. Microscopes, No. 1, Universal Joint............................. 7.50 2677. Ditto, No. 3...10 00 2678. Ditto, No. 4...................................................15.00 2679. Ditto, No. 1, in two columns, etc..............................'25.00 3144,'45. Lantern, Browning's, for projecting Spectra on the Screen. $50.00) to 150.00 APPARATUS FOR ORGANIC ANALYSIS. 2948. Air Pump Plate, 7~ in..................................... $25.00 2948. Air Pump Plate, 71 in....$25.0a 1362. Aspirator, the same as used in Apparatus 13.2, on p. 15...1.50 to 2 50 1360 to 1362. Aspirator, glass...................... 2......00 to 3.00 1365. Aspirator T'ubes..50 3646. Complete set of Apparatus for Organic Analysis, according to Liebig...................................$45.00 1714 to 1720. Chloride of Calcium Tubes..15 to.60 1776. Combustion Boats, porcelain...20 to.50 2926. Ditto, ditto, Platinum, per grain.................................03 2375. Ditto, Furnaces, Bunsen's gas............................ 60.00 1780. Ditto, ditto, American gas..................................( 1781. Ditto, ditto, French gas......................30.00 1782 to 1783. Ditto, ditto, to be used with Kerosene........... 12.00 to 40.00 1777. Ditto, ditto, Storer's. 1.0() 1778. Ditto, ditto, Liebig's Charcoal.2.50 to 3.00 1789. Ditto, ditto, Foil, of Copper, per ounce.....05 1791. Combustion Tubing..... 40 to..50 1792. Ditto, ditto, for Nitrogen determination.................35 to.45 Copper Turnings (see Chemicals), per lb........................ 1.00 2423 Ditto, Gauze, per sq. ft..85 2050. Drying Baths.................................................. 2.50 2061,'62. Drying Tubes, Liebig's............................ 50 to.60 2343. Filling Tubes..........50 2417,'18. Graduated Tubes for Nitrogen determination....... 1.25 to 2.50 2416. Glass Tubes, for weighing substances to be analyzed, per doz.... 2.00 3387. India Rubber Tubing, i in. bore, per ft...........................10 2664. Mercury Jar, of glass................................. 1.00 to 2.00 2670. Ditto, Trough, Porcelain, to hold 5 lbs. of Mercury.. 1.00 2671. Ditto, ditto,'litto, 16 lbs. ditto 2.00 2853. Nitrogen Bulbs, lforsford's......................................75 3647. Ditto ditto Simpson's....................................... 1.00 296(8. Potash Bulbs, Geisler's or Mohr's.... 1.00 2966. Ditto, ditto, Liebig'...........................................75 2969. Ditto, Pipettes.................................... —--—............-.50 2343. Suction Tubes.....50 3239. Wood Supports............................................... 1.50 CHEMICALS. Black Oxide of Copper. Chloride of Calcium, fused. Chromate of Lead, pure fused Chlorate of Potash, cryst. Soda Lime. Copper, in fine strips. Bichromate of Potash, cryst. Ditto, Turnings. Caustic Potash. Asbestos, long fibre. Chloride of Calcium, crude, dry. APPARATUS FOR PNEUMATICS. 2946. Air Pumps, large and powerful............. $100.00 2951. Ditto, ditto, Mischterlich's.....................................10.00 2950. Ditto, ditto, ditto, mounted.....................................15.00 OF CHIEMICAL AND PHYSICAL APPARATUS. 247 APPARATUS FOR PNEJUMATICS.-Continued. 2952. Air Pumps, Liebigs, Brass Cock...................... $15.00 2948. Ditto, ditto, with Plate and strong Clamp to attach to a Table in place of Mahogany baae.....0................... $20Q( 2948 2948. Air Pumps, mounted on a fine polished Mahogany base, with heavy ground glass Plate.-......................-..-... $-2. 0The more costly grades of Air Pumps can be furnished, when desired, of first-class workmanship. 1443. Swelled Glass Receivers, with knob, j gal. $1.50, 1 gal. 2.00, 2 gal. 3.00 1444. Ditto, ditto, ditto, open tops, 4" 1].75,1 " 2.50, 2 " 3.50 1449. Plain ditto, ditto,............... quarts, 75 cts, j " 1.00, 1 " 1.50 1446. Ditto, ditto, ditto, tall, with knobs, " 75!" " 1.00, 1 " 1.50 1442. Ditto, ditto, ditto, flat, ditto, -.6 in. $1.25, 8 in. 1.73 364S. Receiver, with sliding Rod, Hook and Ball.... 5.00 Ditto, the Cap and Stop-cock titted, extra....... 2.00 3416. Water Hammer................................ 1.00 2555. Bladder and Hand Glass...75 to 1.25 3649. Magdeburg Hemispheres.............$7.00 to 10.00 3650. Bolt Head Experiments.......... 4.00 3651. Mercury Shower.. 3.00 1289. Air Balloons, glass, for weighing Air, I gal...... 1.00 1405. Ditto, ditto, rubber and Goldbeater's, 2 gal............$1.50 to 5.00 Ditto, ditto. See Balloons. 3338. Torricellian Experiments. $4.50 3652. Guinea and Feather Tube, $8.00 to 10.00 3653. Bell, in Vacuo..... 4.00 1684. Cartesian Imps, singly, from i.25 to 1.00 1686. Ditto, ditto, in Bottles, from $1.50 to 1.75 3654. Model, Hydrostatic Press, $20 00 2459, Hydroclyse, or Forcing Pu p, producing a constant stream of water. enclosed in a fine polished Velvet-lined 3649 3652 Case................................................................ $4.00 248 E. B. BENJAM3IN S DESCRIPTIVE CATALOGUE APPARATUS FOR PNEUMATICS.-Continued. 2460. The foregoing can also be used as a Syringe, supplied with Male and Female Joints, in fine polished Velvet-lined Cases..-.... $5.00 The above is the best fornl of Injecting Syringe known, as its Valves and all its appurtenances are all Metallic. 3655. Hydrostatic Balance.,.,,...................................$10.00 3656. Apparatus, four upward and downward Pressure............... 14.00 3657. Baronleter Apparatus................................. 6.00 1822. Apparatus for Air Cylinder....................................12.00 2316. Freezing Apparatus..................................... 3.50 to 6 00 1912. Cryophorous................................................ 2.00 1648. Burstinlg Squares, per doz.........2 50 365S. Apparatus, for illustration of Marriotte's Laws.... 10.00 2904. Bubble Pipe, for Gas.-. —------------------------------.75 2313. Fountain, in Vacuo............. —-. ——. 9.00 2953,'54,'55. Pneumatic Tr;ough, Japanned, 12 in. 3.00, 15 in. 3'0, 16 in. 4.50 2956. Ditto, ditto, Glass, solid, 12x.5 inl.. -................-4.50 to 8.00 - Ditto, ditto, with Brass Sliding Shelf. 1.00 2957. Ditto, Turning Corners, very stout, 12x6 in..... 7.00 29 8. Ditto, ditto, ditto, ditto. 14x7 in..... 8.50 - Ditto, ditto, Porcelain, for use with Mercury. See Mercury Troughs. 1441. Bee-Hive Shelves, Porcelain, small....25 Ditto, ditto, large..........75 Ditto, ditto, ditto, Eartllen-........................................2 Fittings. See Stop-cocks, etc. 3659. APPARATUS, recommended by Dr. Scheibler and others, for the Analysis of SUGAR, SYRUPS, etc. 1257. Apparatus for determining the quantity of Carbonic Acid in Bone Ash, accompanied with instructions, bottles, etc., corrected by Dr. Scheibler, $35.00 12' 9. Dr. Scheibler's New Apparatus, for Quantitative Volumetric Analysis of Carbonic Acid. — —.. --—. —$45.00 131:3. Salleron's Alembic, for Testing the percentage of Alcohol in Saccharine Solutions...............$.......................... $25 00 1374. Balance for Specific Gravity, sensible to I0 of a millogramme..77.00 1376. Ditto, ditto, for 200 grammes............107.00 ]648a. Colorimeter, for the examination of Sugar and Syrups......... 1949. Mixing Cylinders........................................].30 to 4.50 2044. Drying Baths............................................... 15.00 2-205 to 2230. Evaporating Dishes..20 and upwards. 2495 to 2499. Saccharometers................................ 75 to 2.,-o 2500. Ditto, according to Dr. Scheibler......... 15:00 26:35. Centimeter bottles, stoppered..............................35 to 1].60 2636. Ditto, not stoppered......................................2.5 to 1.00 2637. Ditto, with two marks on the neck.........................60 to 1.'25 2692. Mixing Bottles...............-. 2.50 to 3.50'29-9. Saccharimeters, or Polarization Apparatus, Mitscherlich. —-. —.60.00 2960. Ditto, Wild's, in Mahogany Case.............................. 17..00 2961. Ditto, Soleil.-................................................. 0.00 2962. Ditto, Soleil-ventzke.........................................'225.00 APPARATUS FOR WATER ANALYSIS, ETC. 3660. Apparatus for the Decomposition of Water, mounted on stand, $2.50 3601. Ditto, ditto, ditto, with cup complete, according to Faraday.. 5.00 3662. Ditto, ditto, ditto, unmounted, Hoffman's.... 6.50 3663. Ditto, ditto, ditto, mounted.............. 10.00 3664. Ditto, for the Determination of Water and Carbonic Acid in the atmosphere, after Fresenins....... 2.00 3665. Ditto, for the Analysis of Mineral Waters, by Fresenius. - 10.00 OF CHEMICAL AND PHYSICAL APPARATUS. 249 APPARATUS FOR WATER ANALYSIS, ETC.-Continued. 2143. Bunsen's Apparatus, for Rapid Filtration......................$11.00 3660. Ditto, set usually employed, including Flasks, Funnels, Mould HoIder and Cone.................................................... 1.00 2247. Support of Japanned Tin for Bunsen's Apparatus........... 3.00 2252. Flasks, for Filtering, extra heavy glass, wide mouths, 16 oz....40 " Ditto, ditto, ditto, 4 oz..................................... -.50 " Ditto, ditto, ditto, 32 oz...-....-.......... —- ------ - ----.60 2319. Funnels, prepared expressly, and ground to an exact angle of 60 deg. on Moulds made for the purpose, 1 in.......................15 " Ditto, ditto, ditto, 2 in..'20 Ditto, ditto, ditto, 3 in..-0 " Ditto, ditto, ditto, 4 in.....-..................40 "Mould and Holder for preparing the Cone...... 1830. Platinum Cone, for Supporting the Filter, price according to weight, per grain, about........... VARIOUS FORMS OF APPARATUS, ACCOMPANIED WITII ACCURATE DRAWINGS AND SPECIFICATIONS, MAY BE MADE SPECIALLY TO ORDER, EITHER IN GLASS, BRASS, OR WOOD. ORDERS ALSO FOR TECHNICAL AND TEXT BOOKS, WILL BE EXECUTED PROMPTLV, AND PACKED WITH GOODS IN MY LINE, WITHOUT EXTRA CHARGE. 250 E. B. BENJAMIN'S DESCRIPTIVE CATALOGUE. 3667. Dr. SQUIBBS' NEWLY INVENTED UNIVERSAL LABORATORY SUPPORT, Adapted to sustain Tubes of any size, up to 3 inches. Price, $2.50 This SUPPORT supplies a want long experienced in the Laboratory, in substituting a single Apparatus for several varieties. 3668.-RELATIVE VALUE OF VARIOUS, WEIGHTS AND MEASURES. TROY AND AVOIRDUPOIS WEIGHTS. Pounds. Pounds. Pounds. Ounces. Grains. 1 Troy 0.822857 Avoir. 0= 13 72.5 1 Avoir. _ 1.215277 Troy 1 2 28.0 3669.-RELATIVE VALUE OF TROY AND FRENCH I EIGHTS. TROY. Millegramme -.015-4 grs. Centigramme -.1543 Decigramme = 1.5434 Gramme 15.4340 Pounds. Ounces Drachms. Grains. Decigramme _ 154.3402 = 0 0 2 34.3 Hectogramme = 1543.4023 - 0 3 1 43.4 Kilogramme = 15434.0234 - 2 8 1 14. Myriagramme - 154340.2344 = 26 9 4 20. 3670.-The French Metre, or Unity of Length, at temperature of 32 deg. Cel. - 39.371 Eng. inch, at 62 deg. Fah. The French Litre, or Unity of Capacity, at same temperature, - 61.028 Eng. cubic inches. The French Gramme, or Unity of Weights, at same temperature, - 15.434 Eng. Troy grs. INDEX. A.. PAGIo PAGE Ajparatus for Deconmposition ofWaAbsorptiometer, Bunsen's........ 6 ter.................... 248 Absorption Tubes.......108 " for Distilling Water, etc.... 69 Acetometers.................... 6 c," " " Milrrle's.....237 Acid Dishes.........7-8 " Electricity.......... 73, 75 Funnels..................96, 97 " "Electric Measurement, 83,240 " " with stopcock....... 97 " "Gas Analysis.....238, 239 " Jars..8 " "Heat................ 24 "Measures. -................ 8, 9 " "Hinricll's Physics.......229 Acidimeter......-............... 6 " "Hoffinan's Chemistry... 232 Adapters, various.............. 9, 10 " "Hydraulics and HydrostaAdhesion Plates........ 244 tics........ 42 Agate Centers.............. " "Illnstra'ng Mariott'sLaw,248 Bulrnishers............... 39 ""Influence of Pressure at " Mortars....................134 Boiling Point. -......... 241 " Slabs.......... 10 " "Magnetism.............243 Air Drying Baths............ 71 " " Mechanics........... 244 "' Furnaces.... -.............102 "" Medical Tests -...........222 " Globes.........10 " "Miners and Engineers...223 " Pumps......143, 144 " " Nitrogen, determination Alcoholometers.......... 10, 1 after Dumas............238 Alembics, Glass................. 11 " "Nitrogen, preparation by'" Porcelain-....... 11 Chlorine and Ammonia.238 c Salleron..- 12 " "Nitrous-oxide, prepara" Stone ware...... 12 tion of................238 Alkalimeters............ 13 " "Optics.. -..-..-....244 Amalgam..... 187 " " Organic Analysis........246 Aneroid Barometers..............19 " "Oxydation of the Soda Annealing Cups...... 14 Flame................. 245 Anavils -........................ 14 " "Pneumatics - 24.2.......7 Aphlogistic Lamps.......: 14 " "showing the principle of Apparatus for Agricult. Chemistry, 220 the Rev-erbal Balance...244'" "i Arsenic detection.._- - 14 " "Schools and Academies.. 215 Assay....... 5 " showing the Spheroidal state " Barker's Chemistry.. 217 of Liquids...........-... 241 " Beginners in "..214 " for Steele's Chemistry......216' " "Blowpipe Analysis...226 " "Stockhardt's Chemistry..224 "c "s "c ".c.227 " "Students and Colleges...224 ( " " qqnalitative.228 "' " Qualitative Chemcc" " " quantitative.229 ical sets....221, 231 " Bunsen's, for various pur- " " " Quantitative Chemposes.................38 icalsets.... 230' for Carbonic Acid deter- " " Sgar and Syrup An'lysis, 248 minations, various.. 12, 13 " "8ulphur Determinationby " for Carbonic Acid deter- Chlorine.............238 minations, inbone black 7' " Sulphuric Acid Manufac" "Chlorine Gas Genera- ture.......... 9 ting................45, 46 " "Upward and Downward " for a Course of Lectures.217 Pressure....,....- 248 352 INDEX. PAGE PA.GE Apparatus for Urinary Deposits by Biot's Hemisphere................... 76 Qualitative Analysis.. 221 Black's Blowpipe................. 25 " "Urine Analysis, Flint's Black Lead Crucibles.............157 method... - 225 Bladders....................... 24 " "Vol umetric Analysis of Bladder and Hand Glass —.....111 Urine.................221 " Pieces..................... 24 " "Volumetric Chemical An- Blast Attachments for Blowpipe.. 24 alysis............-..219 " Burners, Gas............-.:t6 " Water Analysis.......... 248 " Furnaces for Gas. 100, 101 " Mineral Water Analysis..248 " Lamps, Gas. 37 " "Water and Carbonic Acid " Lamp, Alcohol.............121 in the Air, determination 248 Blood Circulating Apparatus...... 24 " "Wilson's Chemistry...... 216 Blowpipes....................... 26 Archimedes Principle............. 242'" Compound.. 25 " Screw................ 242 " Oxhydric.............. 25 Argand Gas Burners..............35 Blowpipe Apparatus..............227 " SpiritLamp.... 121 " Flasks-......... — 93 Arsenic Plates.................... 14 " Tables................ 24 " Tubes.................... 15 Boards for pressing Gas-bags.....104 Aspirators....... 15 Boiling Glass... 148 Atomizers............... 15 Bologna Flasks................... 32 Atropia Bottles................ 15 Bolt Heads....................... 27 Atwood's Falling Machine........244 Bolt Head Experiments...........39 August's Psychrometer...........116 Borchard's Electric Machine.....73 Bottles, Acid................... 7 B "' Chlorine....... 30 Balances.......................16, 17 " Cobalt........ 7 Ballfng's Hydrometer............113 " Colored.-.-............. 28 " Sacharometer.. 1.........14 " Ether.................. 30 Balloons......................... 19 " Gas....'27 Balloon and Jar.................. 46 " Packing, narrow and wide Ball and Ring....................241 month.... 27 Barker's Chemistry, set...........217 " Glass stoppered, narrow " Mill.....................242 mouth -.-............. 29 Barometers................... 9. Glass stoppered, with wide Barometer Apparatus............. 248 mouth.....28 " Tubes................. ] 9 " Reangent.....- --....... 29 Baskets, Lead....................19 " Sample.................28 " Straining. 16 1. " Seperatory. 30 Baths, Drying...71." Tubulated at Foot....... 30 Batteries, Electric................ 80 " with Vitrified Labels..... 29 Beakers....................20, 21, 22 " Woulfi's.. 31 Beale's Quick Filter.............. 22 Bottle Brushes...................33 Beaume's Hydrometers-....113 " Caps... 3 " Sacharometer..........114 " Imps..................... 3 Beaufay Crucibles............... 57 Boxes, Ivory......................32 Becker's Balances............. 16 " Boxwood...... 32 " Weights................178." Japanned..............-.. 31 Bee-hive Shelves. 22." Pasteboard................ 32 Bells, Electric............7........76 " Porcelain................ 3 Bell Glasses.......... 22, 23, 24 Bombs........................... 32 Bell in Vacuo....................39 Bradley's Apparatus for Electric Bellows.......................... 24 Measurement.... -240 Berzelins' Apparatus for Carbonic Browning's Electric Lamp........ 63 Acid determination. 12 " Spectroscope.......... 160 Berzelius' Beakers.............. 21 Brushes, Acid.................... 7 " Blowpipe.............. —23 " Button................ 33 " Filtering Paper......... 91 " Camel's Hair............ 33 " Gas Bottle. 105 " Test Tube............... 32 Bichromate Batteries............. 81 Bubble Pipe...................... 33 Binding Clamps.................. 24 Bulb Tubes...................... 33 " Screws..................24 Bullion Scales.................... 18 Bink's Burettes................... 33 Bungs. 33 INDEX. 23 PAGE PAGE Bunsen's Absorptiometer -. 6 Capsules,Platinum............... 40 Absorption Tubes. - 108, 109 " Porcelain............ 40 " Apparatus for obtaining " Silver..................40 pure Hydrogen Gas. — 239 Carbon Points.................... 41 Apparatus for obtaining Carbons....... 41 pure Oxhydrogen gas. 239 Carbonic Acid, condensed --— 41 Apparatus for determina- " Generator. 41 t tion of Carbonic Acid.. 13 Carbon Cells..................... 43 Barometer.....19 Carboys.-............... 42 Battery.-.......... 80 Carre's Dielectric Machine.... 164 " Burner Tips for flat/tame, 39 " Air Pump.................143 " Blast Gas Lamp.. - 36 " Ice Freezer............... 116 " " Attachment -— 24 "' " Wohler's..116 " Blowpipe.......... 26 Carius' Oven..................... 103 " Burners.35 Carthesian Imps.................. 42 " Burner Jets............. 120 Cartier's Alcoholometers.......... 11 " Carbons................41 Casseroles... —- --....42 Charts.................. 45 Cassolettes..- 43 " Chlorine Absorbing Ap- Cat Skins........................43 paratus... - 46 Caustic Holders... 43 Clamp-............. 24 Cells, Porous.................... 43 Eudiometer.............85 Centre of Gravity.. 244 " Gas Tubes......108, 109 Centimeter Measures............. 43 Gasometer, Mercurial.... 108 Centrifugal Forces.-........244 GasRegulator..... 108 Chameleon Burettes.............. 34 " Hot Air Bath..........72 Chamott Furnaces...............99 " Meter for Gas..........- 108 Chandler's qualitativechemicalset,231'" Photometer...... 139 " quantitative " " 2:30 " Pinchcock..............141 Charcoal Borers.. 43 " Quick Filtering Appara- " Holders......... 43 tus...................89 " Pieces.. 4 4 " " "4 " complete.. 249 " Saw....... ---— 43 Burettes, Mohr's, Bink's, Gay Lus- " Spatula..43 sac's, Geissler's, Rammelsburg's, " Sticks...... 44 Chameleon, etc.....33, 34 " Tongs.................44 Burette Clamps.................. 3. 4 Chardin's Filtering Paper. 91 Floats................... 34 Charts...........................46 " Tips....................34 Cllemicals, List of........101 Burners................. 35, 36, 37, 38 Chevalier Cremometer............57 Burner Attachments.............. 36 Chilton's Furnace........102 " Forks......38 Chimes...................... 46, 47 " Furnaces................. 39 Circular Magnets.....243 " Plates............39 Chisels for Ingots.......... 44 Tips....................39 Chloride of Calcium Jars 44 " Tubes, flat ends ----— 39 "' Tubes —.. 41 Burnishers..39' " "' with bulbs. 45 Bursting Squares................. 39 Chlorine Bottles...................30' Distilling Apparatus..... 46 C. " Meter..................46 Candlebombs....................39 " Gas Apparatus ---— 46 Canules....-.... 40 Clamps, Binding.................- 24 Caoutchouc Caps..39 " Iron.. 47 " Balls.................39' Wooden..........47 Capillary Plates.. 39 " forWatch Glasses. -— 47 " Tubes 40 " " " Craig's.47 " Tul)ing.- - -40 "' " Hoffman's 47 Caps for Bell Jars, Gas Bags, etc. 40 " "' Mohr's...47 " " Gallipots............40 Clark's Retort.... ----- --- 151 " Porcelain, for lamp chimney. 40 Clay Cylinders.-.......... 227 Capsules......................... 40 Clips for Watch Glasses..... 47 " of Horn.-....... 40 Cobalt Bottles.-........47 of Iron.........154 " Glass Plates............... 49 Mixing.....-._129 Coddington Lenses................ 124 254 1NDEX. PAGE PAGE Coffee Machines, French..........48 Cork Knives............. 56 " German.... 48 Pressers, of Iron. 6 Coils for Induction............... 78 Pressers, ofSteel --------- 56 Colande.6 Squeezers.-.5. —,,,, —]61 5 Collections of Apparatus.. ------.214 Tongs-56 " of Artificial Gems 48 Cotton Wik..........124 " of Crown Diamonds. 48 Covers, Gss, convex-56 " of Crystalographic Models.. 48 flat 56 " of Specimens for Spectral An- square, ground 56 alysis..................... 48with ole in the side " of Nitrogen, Simpson's Appar- and center56 atus for 49 with knob. -.... 5749 Collision Balls...-. 49 Miroscopic sqrs and circles, 57 Collodion Balloons&...............19Crlamps. 47 Colored GIasses.................. 49 Cr ter " Glas s Plates. 49 Crown Burner.-38 Color Tests, on Porcelain slab.. 49 CrciblesAssay-57 Columbia College qualitative Blow- Beaufay.. 57 pipe, set...... - 228 Berlin...58 Columbia College quantitative...229 Biscuit Ware59 Combustion Boats.. 4 9r.. —-... 5849' Bricks51 " Covers..-51 " Foils, of Copper. 51 Hessian or Sand.9 " Furnace, Bunsen's Gas.. 49 Iron57 "' Liebitrg'sCharcoal.. 49 Metallurgist.59 "'-' "Storer's Gas....... 49s58 ~'- "'French........... 50Platinum.59 " " for coal oil.- -, 50 Plumbago57' Supports................ 51 9 " Tubes-.................5160 Commutators or Current changes. S " Silver 59 Compasses-............52 Crucible Moulds. -60 Compound Bar —-------— 52 " " of Brass —--— 136 Blowpip~e —----— 25 " of Boxwood.-..136 Condensers.....52 " Supports-........60 Condensing Tubes. - 53 " Tongs -.17 " Chamber-...53. Tubes for reduction.. - - - 59 " Cylinder-...53. Cryopherus..-.........60'~Pump.. 144 Crystals, Models of. 48 Conduction of Heat downwards, Crystal Drainers. —- ----— 60 Apparatus for -..54 Crystallizing Dishes-........60 Gonductometer- -...54 Kettle__-...120 Cone, Dissected..54 Cubic Centimeter Flasks-......125 46of Platinu-11 54. Cupels. - ------------— 61 Conical Beakers -.22 Cnpel Furnace-..........99'P4 est Glasses -.......167 kg Holders....61 Connecting, Limbs..... - - ------ 541 Moulds, of Brass. - 6 6 " C Tubes -........54 " " of Steel-.......61 Connecters. of Brass_ - 54, 55 Cupping Glasses.-.._ - 61 6 Gallows Screw --— 55 Cups, Annealing --------— 61 "9 of Rubber_._.__._55 "4 Feeding.-6 1 Co-oper's Mercurial Gas Receiver. 55 " Medicine-..........61 Copper Foil..51 "Porous.................43 " Gauze, —--—.. —~ 109 " Seidflitz, Powder-......61 " Sh-eet-..5i CuattingPliers-...........62 -' Wire-..........179 Cuvettes.6-2 Water Baths 177 "Cylinders, Glass. —--------- 62 Corks, Champagne......... " Graduated Cubic inches..- 63 " Chemical_....." " into " Centimeters. 63 "t Rubber - 153 ". " " 1 Grains. —---— 63 " Teats -.. So~~~~~5 " " Grammes-.....63 Cork Borers-SS "~~~~5 for Electric Machine -....64 INDEX. 25 PAGE PAGE D. Distilling Retorts, Copper....... 15 Dancing ImagG.......... 15 G1 Danci Plates................... 76 "4 Iron. 152 Daniel's Battery..... " " Lea I-152 Hygrometer.............116 " Stone Ware... 152 it. Zines... 180 Diving Bell 243 Day and Nit Thermometer..... 64 Dcebereiiner's HydrogeLamp- 70 DaysSftamp........ 64 Dome, Porcelain..70 Decanting Jar.................. 64 " Sheet Iron.....70 gSyries. 64 DouceleuLr Apparatus244 s.................64 Drainers.....60 Decimal Scales, Centimeters......43 Drawing Curves...71 Decoction rs..............135 " Protractors.71 Decompositio Water Apparatus.248 Drawing Tools -.70 Decrepitati Iron Spoon.........159 Dropping Bottles.. 7 Deflagrati Cover...... 64 " Flasks.71 Cup......65- " Pipettes.....1 Globes... 64 " Tubes.71 Hooks..............64 Druggist Mill...72 Jars..'23 Drummond Lanlps for Petroleum.. 71 Spoons 64. Gas........123 Stands. - 64 Drying Apparatus....6 Taper Holder. 65 " Baths, Copper..71 Dentists' Furnace....100, 101 " " Porcelain Regulator 71 Descroizille's Alkalimeter. 13 " " Electrical Relator 72 Dessicators............... 65 " Bottles.72 Dessicating Apparatus....... 65 " Oven....72' Fresenius... 66 "' Rammelsburs 72 Baths.... l. 71 " Plates —.72 s 7 " TuOvens........ 72 ---—. 72... 65' " Lielbig's.72 "4 Plates. 66 " " i Mitscherlisch —-— 72 Dessicator, Oblong...63 Duboscq's Lamp. —------— 82 " Porter's. —-65 " Spectroscope. —--— 245 " Schr~tter's. 63..D.tch.Metal.72 Dialysers._.__ 66 Dyer's Cloth............. 72 Diamonds for Cuttingf Glass.... 66 DeP t.42 writing- on "....66 Diamond Jar.76 B " Models..........48 Earthorn Dishes..........67 " Mortars..........66 Edson's Hygrodeik.........24-2 Dielectric Macblue.........75 Electrical Apparatus. —----— 13 Differential Therniometers, lplaini. -66 "4 Batteries. 82, 80 4 ~ with stopcock "t Bells..........7 connecting 66 "t Cyl inders. —----— 64 Diffusion of Gases, Apparatus for.. 8 "- Egg Stand........d6 Digestors, various_...._..67 " Flier..-.7 6 Dippers. -..............67 " Lamips......_.82 Dipping Batteries.........81 " Machines.........7 4 "4t Needles.. —--- 67 " Orrery..........d Dischargers, Electrical various.. 76 " Plates.7 —-----— 6 Dishes, Draining. 68 " Pistol...........77 " Earthern......... 6 7d Roller. -.. P4 "t Iron.67 " Sportsman.-..77 "4 Porcelain.........67 "4 Stool_ ----------— 76 94Roasting-. 68 "1 Tubes.78 Displacement, Apparatus. 68,69 "1 Vacuum Tubes......79 Dissected Cone....244 Electric Fire Damp Indicator...111 Distilling Apparatus....-...69 "4 Measurement Apparatus..240 "9 i Mlrrle....237 "4 Telegraph. —-----— 78 it 49 Iron. 6.) Electro Magnet on stand to lift "9 1 Wurtz.. 70 Heavy Wehight......243 "9 Flasks. 69 Electro Magnet, Pa-e's.......7 '255 1NDEY. PAGE?AGE Electrometer Gold Leaf-.......... 75 Filter, Calico...... 90 Jar................. 76 " Covers.56 " Pith Ball............ 75 " Dryer... -91 Thompson's, for Elec- " Holder.....................91 tric Measurement. 83 Hooks.....................91 Electrolfhorus..7. ]' Ring s.-91 Elliptical Roller -.....241 " Stands.....................164 Elutriating Apparatus............- 3 Filtering Flasks ----------------.91 Enamel -84 Filters, Felt......-91 Enamelers File -. 85 " French Grey 91 " Knife.................85 " " White.............91 Plates........85 Filtering Paper, Chardin..........91 Endosmosis -....................85 " French -.-. —---. 91 Eolipile of Glass ----------------— 85 " " German -..-_.- 92 Lamp, Brass.-.........85 " " Swedish..........92 "4'. Tin. - 85 Finger Tips, Rubber..-.........- 92 Eprouvettes.......................167 Fire Clay-.92 Equilibrium Tubes-.. 242 " Damp Indicator.-...........118 Erdmann's Apparatus for the de- " " Safety Lamps-....64 termination of Carbonic Acid.... 13 " Syringe.....................92 Erdmaun's Float................. 34 Fittings, Various... 92 Erlenmeyer's Oven... 103 Flameless Lamp -. —----------—. - 14 Ettling's Pipette.141 Flasks, Bohemian - --------------— 92 Ether Bottles. 30 " Bolognia -..................3 Distilling Apparatus........ 85 " Florence -.................93 " Extraction Apparatus, Bo- " with tubulature on the neck 93 hemian -...................... 85 " " " " bulb 93 Ether Extr'tion Apparatus, Mohr's 139 " Copper..._____....94' Jet-85 " Iron.......................94 Eudiometers, Bunsen's.. 85 " GasEudionieter, Hoffman's.....86 " Litre..125'~ Ure's -.............. 86 " Oxygen -107 Evaporating Dishes, Glass...... 87 Flints Urine Analysis Apparatus " " It-Iron......... 87 for.-...........................225 " " Platinum.... 87 Float, Erdmann's s -34' Porcelain.. - 87 Florence Flasks. -93 " Silver.......87 Florentine Receivers ------------— 150 " Berlin... 87 Foil Copper......................51 " French 88 " Platinum... 143 Meissen..... 87 Foot, Hares -.....................227'"Thuringian.. 88 Forceps, Brass ------------------— 94 Gold Washing 88 " Bending -................95 Kettles -89 " Cutting....95 Eye Baths........................89 Jewelers -.....94 " Models......................89 " Steel -...................94 Evolution Flask..................89 " Stubbs_ 94 Exsiccators.. 5 " German Silver. 95 " Wire -...................95 F. Forks for Gas Burners-..38 Faraday's Jets....................120 Fossils-....213 " Retorts.151 Fountain in -ao..95 " Washing Bottles.......177 Formation of Water ini Vacuo......95 Files, Enamelers. - - 89 Fractional Distillation of Water.. 70 " Cork....89 Frames —... 95 File Handles......__.89 Freiblrg Hammers-.........111 Filling Tubes -..................-98 Freezing in Vacuo-..........95 Filtering Apparatus, Beale's.......89 Fresenius' Acidimeter..... —.... 6 " Bunsen's. 89 " Arsenic Detection 14 Copper....89 " Apparatus for Carbonic Plautainour's 89 Acid in Carbonates......- 12 ~' " Porcelaii....- 89 Fresenius Chlorine Distillation..- 46 Filtering Apparatus, Bell, Glass and " Dessicating Apparatus.. 66 Slab. -........................... 90 " Hot Air Bath...... INDEX. 25? PAGE PAGE Fresenius' Fifer Support.....1....64 Gas Generator, Kipp's..... 1... 106 Funnels --—..-..- —.....................96 " Hydrogen Generator, Copper.. 106 Bohemian................ 96 " " " Glass...107 Quick Filtering, Bunsen's. 96 " Sulphuretted Generator. 1065, 107 Filling... 98 " Oxygen "...-. 107 Futed.-...............- 96 " Globes....................... 64 German...................96 " Holders, Pepy's of Zinc.......07 " Porcelain Safety..- 98 " "' Copper...107 " " Perforated..-. 98 " " for Oxygen and Hydrot " Retort-..... ~ 96 gen............................ 10o8 44" Percolating..... 98 Gas Jars...-'................ 23 " Gutta Percha.. 99 " Jets - 119'" Gutta Percha. Conical... 99 " Meter............... 108 " Gutta Percha, Spherical.. 99 Gasometer, Bunlsen's Mercurial....108 " Plattner's................. 227 Gas Regulation Burner —...........108 Separating Conical.. 97 " Regulator...................108 9' " Globe Shape... 97 " Pistols.-..-.. -.....- -- 108 Funnel Tubes, Conical -----—....- 97 " Pipettes -.... —--- --...- -108 "~' " Thistle Top........ 97 " Pipette, Ettlings.............108 " " Welter's Safety.. —-- 97 Gassiot Cascade.-.-........... 244'" "''' I..- 98 Gas Tubes.-.................... 108 "~' " Mitscherlisch..-.. 98 Gas, Washing Apparatus. —------ 109' Supports.... 164 Gasogenes....................109 Furnaces, Erduann's............. 99 Gauge Tubes...109 Porcelainl. —. 99 Gauge Ring and Ball.. —--—.... 211't for Gas....-.......161 Gay Lussac Alcoholometer.-...... 11 " " Kerosene. —-...... 161 " " Alkalimeter. -.- 13'~ Clay....99 " Burettes............33 C" Chamott.... —--- ---- 99 " " Supports.... 165 " Cupelling..............99 Geissler Burettes.......33, 34 " Iibbs..-.-.-. —-— 100 " Tubes....7, 79 Frenich Crown......... 101 " Apparatus for the deterL" Kent.....,. —--- 99 mination of Carbonic Acid...... 12 t" Griffinu's..101 Geissler Potash Bulbs.............147 " Perrot.............. 100 " Glass Stopcock.......... 160 Chilton's.-..-..... 102 Geological Hammer.... - 111 " Enamellers..........102 " Specimens.-.-..206 t" Lead Basin.-..........102 Gibbs' Thermometer Tubes.. -...173 Carius'................103 Glass Blowpipes.23........ 25'" Erlenmeyer........... 103 " Blowers Table..............109 Bunsen's.......-...... 103 " Condensers................. 52 ~" Combustion....... 103 " ends for Burettes.......109 " Pieces..............,,.. 11 0 G.' Plates, ground ].........109 Galactometer...,..................103 " " " 1 inch thick... 109 Gallipots. -..-....104 " " Colored........109 Galvanometers, Astatic............ 77 " Rods-.....110 4" Sensitive. 77 " Shades.._.....110 " Tangent........... 77 " Stirrers_....160 Galvanic Batteries..... —........80 " Tubing...174 " Decomposing Cell, Bun- Globes of Glass for Deflagratig...( 64 seu's. —--------- --—. —-- 239 Gloves, Rubber..1.. —--- It10 Galvanic Decomposing Cells, Hoff- Goniometers, Iauy's.... 110 matnns..... —--- 233 " Germnan... 110 Gas Analysis Apparatus.......- 238 " Wollaston's.......110 " Bags.- —................104 Graduate Glasses... 1 1l " Bottles...,. ----—.,,.2. —'7 pGraduates, Glass Minims, English 110 4" -.......................105 " German. 111I Blowpipes...' 25 " 2 English shape. 11 " Blow tables.... ---— 24 " French shape....11l " Burners.............. 37' ~ Tumbler shape. l11; Flasks.... —-. —--- ---- - 94 Graduated Apparatus, 13, 33, 34, 6]3, 64,'Furnaces.....,..............101 85, 86, 108, 1'25, 129, 141, etc. 258 I'mDEX. PAGE PAGI Graduates, Porcelain............111 Hydroclese.....1....1...2..1 Grain Weights -...1.79 Hydraulics, Apparatus for........242 Gramme Weights. 179 Hydrogen Generator........ 107 Griffin's Blast Gas Burner 87 " Pistol......... 108 "4 " Furnace. —-- 101 " Gas Holders............ 108 " Beakers.22 " Gas, Bunsen's Apparatus for239 Grove's Battery..-. —-.. —— 80 " Gas Lamps................ 70 " Zincs.-................180 Hydrometers........1..113. 114,115 Guinea and Feather Tube —......247 Hydrometer Jars.......-115. 117, 118 Guibourg'sDisplaceren t Apparatus 69 Hydrometer, Nicholson's......... 115 Gundlach's Microscope.1...........18 Hydrostatic Balance..-. 248 Gutta Percha Funnels............ 99 " Press................ 247 " Measures...........127 Hygrodeik, Edson's.242 Gyroscopes-...................244 Hygrometers, August's Psychrom'r 116 4" Daniel's.............116 H. " Mason's........... 116 "' Saussure's.......... 116 Hammers.......................11 " Blowpipe..-...111 I. " Geological.... —-- 111 Mineralogical.- 111 Ice Freezer, Carre's-.... 116 Plattner's -..111 "Il Hoffman's............ 116 " Watchmakers'. -_.. 111 Ignition Tubes...................116 " Water.................177 Illustration of Weights and Pulleys 244 Handles........................11l nmps.31 Hand Glass... I I Inclined Plane....244 Harcourt's Ivory Scale....-...... 116 Indicator of Fire Damp -.........116 Hardness of Mineral Tests....211 Induction Coils................... 78 Hare's Gallows Screw Connector._ 55 Indigo, Prism.....................147 Hauys' Goniometers..-.-.-110 Inertia Apparatus.......... 244 Head of Hair...... 75 Infusion Jars.....................118 Heat, Apparatus for. 241 Inorganic Chemistry Apparatus..217 Helix Contracting................ 77 Ingot Moulds..................... 136 on Stand.... 77 Illsulated Stool. —-.. —........ 76 " with ring armature -.......77 Illumninating Egg Stand........ 76 Hemisphere, Biot's. —------ -—. 76 Images, Dancing.................. 76' Magdeburg..........247 Iron Ladle.. 117 Hessian Crucibles.................59 " Blowpipe Spoon....19.......... 9 Hibbs' Furnace.......... -........ 100 Ivory "............156 ~ Muffles.- 4-.-.............. 136 Hiero's Fountain... -.- -... 76 J. Hinrich's Physics. —— 2-... —.229 Jars, Anatomical -..... 1...19 Hoffrnan's Apparatus, various, 232, 233, " Battery, plain............... 117 234, 235 " Fluted.-... 117 Hoffman's Supports............... 164 " Chloride of Calcium. —----- 44 Watch Glass Clamps.... 47 " Cold Cream Porcelain....... 117 Iolders for Flasks...... 164 " Conserve....................117 " Flame Apparatus....... 245 " Decanting............. 64, Holders for Burettes......... 162, 163 " Hydrometer, boxwood feet.. 1171 " for Caustic...-........... 112 " " glass feet, swelled top 1174 " for Crucibles............. 164 " " " with ring " for Funnels...............164 around the neck. —....- - -- 118 " for Platinum Spoons and Jars, Hydrometer, glass feet, lipped 118i Wire.....112' Infusion............... 118 Holders for Pipettes. 163 " Leech..............8 " Mitscherlisch's -.....164 " Leyden.....................118 " Retort..................165 " Mercury....................118 " Test Tube..............164 " Oinitment, of Glass...... 118 " for Salts in Lamp Flamles.159 " " Porcelain.........118 Holsteric Barometer..............112 " " " knobbed, 119 Holtz's Electric Machine....... 73 " Powder, of Porcelain........ 118 Hot Water Funnel................ 89 " Preparation.... 1 19 Hooks Deflagrating.............. 64 " Specie -.................118 INDEX. 259 PAGE PAGE Jets, Hydrogen.. -.........119 Leaning Tower......2.....44 "Wash Bottle-.,,....,.......119 L~clanche's Battery...... 80 " Bullnsell Burner, fiat flame....120 Leech Tubes.........1'24 " to produce a blast......120 Spoonu._....... 159 " Berzelius'..................120 Lelses, Coddington....... 124 " Faraday's........120 " Horn Setting —. —-124 Jewelers' Globes... -.....120 " Magnifying -...........124 Julep Tubes..........120 Stanhope....124 Photographic......125. " Watchmakers' —..........125 Kemp's Regulator........ 71 " Convex and Concave, etc.125 Kent's Furnaces..................99 Leslie's Alkalimeter -........ —--- 18 Muffles....136 " DifferentialThermometers. 66 Kettles, Porcelain..... 120 " Freezing Apparatus.......95 Kipp's Apparatus for Sulphuretted " Graduated Cylinder..-..63 Hydrogen..................... —105 Radiator...............241 Kipp's Apparatus for the determin- Leyden Jars.....118 ation of Carbonic Acid...... 12 " "movable coatings,,... 76 Knife for Blowpipe...... 120 " "with bell -..........76 it i cutting cork............120 Liebig's Apparatus for Organic An" " " tubing..........120 alysis............246 Liebig's A, pirator..-............ 15 L, " Charcoal Furnace for ComnLabels, Blank................120 bustion.___..........49 Chemical................120 Liebig's Condensers..............52 Label Book, Mawson's........120 " Drying Tubes. —.......72 Lactometers -.. —--------------— 114 " Gas Bottle................105 Lactoscope, Vogel's. ——.. —-----— 120 " Potash Bulb.......147 Ladles, Iron ------—. —--—......121 " Retort, double Tube.....151 " Porcelain-.......121 " Safety Limb.......125 Tinned........121 Lippincott's Vapor Index.......... 77 Lamps, Berzelius....122 Limb, Drying, Liebig's. 54 Bunsen's Gas.-.. 35 " Safety "...........125 " Alcohol, on tripod.........121 Light, Refraction of...- 125 "' Aphlogistic...... 14 " 6Recomposition of..........125 i Davy's Safety.............64 Litmus Paper, various colors......125 Drummond, for Coal Oil... 71 Litre Bottles.....................125 Drumnmond, Duboscq's....123 " Flasks,various....... 125 " Electric. 8...................3 Loadstone....... 244 " Engravers'.................123 Lnbin's Cassolettes......... 43 i Flameless.......... 14 Luminous Plate........... 76 " Furnaces...... 9....... 90 "' Gas Blast_.......37 M. " Hydrogen................. 70 Machines for Coffee making.....48 " Laboratory............... 123 Magic Lanterns.........125'd Magnesium..............123 " Slides. —---—. —244 " Muller's..................1'22 " Circle...........77 " Oxhydric,...............__..123 Magdeburg Hemisphere —- -......247 " Perfume. ---- --------— 121 Magnesium Ribbon and Wire.....127 Plattuer's Blowpipe....123 " Lamps.............123 Rose's.......122 Magnetic Dipping Needle..... 126 " Russian Alcohol Blast...154 Needle on Stand......127 Spirit, Brass..........121, 122 " Toys - -...- -...........127 " " Glass...............122 Magnetism, Apparatus for-.......243 " Student's...... 123 Magnets, Bar............127 " Stands..............165 " Compound.127........127 " Wicks. —--—.. —. —---— 124 Circular_.........243 Lang's Alcohol Lamp............. 121 " Electro._ _...........243 Lead, Basket................ 19 " Horseshoe...............127 Measures...127 " Revolving..............243 " Retorts....................15- " on Stand....2....43 " Trays............1..........124 " with Wheel'rmature...244 " Jars................118 Magneto-Electric Machine....126. 127 260 INDEX. PAGE PAGI Magnifying Lenses...............124 Mitscherlich's Polarization ApparaMarchand's U Drying Tubes-.......44 tus -........145 Mariotte's Laws, Apparatus.......-127 " Potash Bulbs -...147 Marsh's Arsenic Test.............. 14 Mixing Bottles-..........129 Mason's Hygrometer..............116 " Capsules, brass - -.. — -.....129 Mattrasses- _..............127 " " horn -.......129 Mawson's Labels-.................120 " Jars...................129 Measures, Assayers'...............127 Model showing motions of human " Glass.-.......111 eye-....................245 " Gutta Percha -........127 Models of Crown Diamonds -.......48 " Graduated -.-..110 " of Crystals.......__...-48 " Lead..................127 " of Eye.....-...89' Metre.......... 128 " of Precious Stones —------- 48 Porcelain..............127 " of Machinery....- 130 Measuring Bottles..._.......125, 129 " of Mining Machinery and " Cylinders -....-......63 Tools...............130, 133 " Flasks..-.-....125 " of Furnaces, &c...-...131, 132 Mechanical Powers.... —--- -----.244 " of Telegraph..............78 Medical Tests, Apparatus for......222 " Water-wheels, &c.........-133 Melting Furnaces. —-- 100 Engines...................131 Mendelsohn's Burners-..-..... 3....38 Mohr's Alkalimeter...............13 Mercury Bottles..................127 Apparatus for determinaBox. -,,,,,,,, 127 tion of Carbonic Acid...........12 Jar, Glass.-......... 127 Mohr's Burettes......... 34 " " Porcelain —... —.127 " Chlorine Safety Pipette..46 " Shower...-128 " " Gas Apparatus.... 46'~ Trough................. 127 " Clamps.-.. 47 Mercurial Receiver -. —.- - ------— 127 "Distilling Apparatus...- 46 Metallic Plates for Dancing Figures 76 i" "..237 " Syringe-.........166 " Perculators...-. 139 Thermometers............1 69 " Pinchcock................. 140 Metre Measures...................128 " Pipettes. — -....- -......141 Microscopes, Aplanatic -..-...-..125 " Potash Bulbs..-............147 McCullough's Manual............. 10 Monochromatic Light Apparatus.. 133 Microchemnical Flasks...- 13 Mordaunted Cloth-................133'~ Funnels..... 96 Mortars, Agate. -....-... 134 Retorts.-.....152 " Diamond................ 66 Watch Glass Heaters 38 " Emulsion..- -... -.135 Microscopes, Large.. - 1..........128 " Glass...................135 Pocket...-... 124 " Iron.....................-135 Small...............128 " Mixing.................. 135 " Solar...... --......129 " Porcelain. —........ 135 Microscopic Covers - 2..1.29 " Powder..-.....135 Dishes, Glass(No. 1436) 22 " Steel....................136 " Slides................129 " Wedgewood.... —.. 136 Milk, Essayers -................114 Morton's Monochromatic Lamp...133 Milk Test, Optical...............120 Moulds, Boxwood......136 Minerals. —. —---------------—..206 Brass..........136 " for Blowpipe reactions..-.210 " Charcoal........136 " Cabinets of -.......213 " Crucible.................136 " Crystaline colors -.......209 " Cupel (forming) 136 for Cleavage.....- 211 " Ingot....136 " for Fusibility..2..........21 " Steel (for cupelling)... -.136 " for Hardness.............211 " for forming Square Blocks Mineralogical Hammers...........111 of charcoal-......................228 Mineralogists' Slates... -.......129 Moulds, Scorifier...... —-—........136 Minim Glasses....................110 " Scorifying.......155 Mirrors, Convex and Concave....245'" Suppository.... -..... 136 Misers Plate......................129 Mouth Pieces, Horn... -..133 Mitscherlich's Apparatus for Arsenic for Inhaling -... 134 Detection.....14 " "I Ivory.__. 134 Mitscherlich'3 Drying Tubes-.. 72 " " Wood..-... - -. 134 ~'r'unnel Tubes..... 98 " Blow Pipe.. -.....-a.......5 INDEX. 261 PAGE PAGE Muffle Furnaces......... 99 Paper, Joseph..... 138 Muffles, French Clay..........136, 137 " Litmus....138 " Hibb's...................136 " Neutral.....138 " Kent's.136 " Parchment................138 " Sand......................136 Tea.......................139 Mulder's Absorption Meter.......133 " Turmeric..................139 Mullers, A g a ei-rte....................13 Malers, Ag~ate. 10 " Weights-' 139 Glass.....................137 Parabolic Reflectors..............139 Miller's Lamps...122 Parting Flasks —.................92 Mnnktell Filtering Paper..........92 Pencils, Carbon...................41 Mtrrle's Apparatus...............237 Pepy's Gas Holder................107 Percolators. —,..-.139 N-, Perfume Bottles..................139 Needles, Astatic....... 77 Permanganate Burettes...........33 Needles, Dipping.67 Perrot's Furnace....... 100 " Ma(rgnetic................127 Pestle's Porcelain................139 Nicholson's Hydrometers. 137 Phosphorus Apparatus............64 Nipper Taps......................140 Photographic Baths..........140 Nipple Shells.....................137 " Cuvettes..........62 Nitrogen Bulbs.137 " Dishes.......140 " Limbs...................137 " Lenses.....125 " Tubes...................51 Photometers......................139 " " Boh.......16. Photometric Burners..............139 Determination Apparatus 238 " Candles...,..139 Nitrous Oxide Gas Apparatus...137 " Meter...... 108 Noebel's Silt Apparatus:.........83 Pill Boxes.......'40 Nursing Bottles....... 137 " Tiles....................140 " Corks.137 Pincers...........140 " " Tops..............137 Pinchcocks, Brass.............141 Bunsen's.... 141 0, " Mohr's..............140 Objects for Spectral Analysis, col- " - "with Steel Spring 141 lection.............48 " with Screw and Bent Lip 140 Oechsle's Hydrometer.............114 Pinchcocks, Squibbs'.............141 Oil Receivers....................138 Pipes for Hydrogen Bubbles.....141 Hydrometers..................114 " for Organs................. 141 "Lamps............123 Pipettes, Plain.....141 Drummond Lamp......71 " Ball or Cylindrical....... 141 Optical Apparatus................244 " Dropping................141 Organic Analysis Apparatus......246 " Ettlings................141 Orrery, Electrical.................77 " Filling............1......41 Otto's Acetinieter.............- 6 " Fixed..141 Hydrometer................113 " Graduated..............141 Oxhydrogen Blow-pipes..........25 Pistol Electric....................77 " Lamps...... 123 Pith Balls........... — 142 " Bunsen's Apparatus, for.239 " Ball Electrometer........75 Oxygen Retorts...................152 " Birds........142 Ozonometer, Sieman's.............138 " Images............142 " Electrical..........138 Plantamour's Funnel..............87 Plate Electrical Machine.........75 P. Plate, Rod Hook, and Check Screw.142 Page's Revolving Electro Magnet..138 Plates, Brass..... 142. Rotating Apparatus........138 Dessicating................66 Palettes.......................139 " Earthen.. 14'2 Pans, Bed...139 " Glass.109..............109 Dessicating................65 " " Colored........109 " Expectorating.............139 " Luminous................76 " Gold Washing 139 " Miser......................77 4" Horn......................40 " Perforated..........142 Papei, Bibulous..................138 " Porous....................142 " Filtering..................92 " Metallic...................76 " Filters.91 Platinum Boats..................142 " 41azed.138 " Covers.................143 .,~2 INDEX. PAGE PAGE Platinum Crucibles.. 143 Pumps, Hydrauli.148 " Dishes.......-8142 " End Forceps............94 for Fire Engine, Illustra" End Tongs.............142 tion148 " Foil................... 143 Pumps, Pneumatic246 " Jets.................... 142 Punch Stick148 " Points-Pugents, Various...... 1482 Pu149 " Sheet............143 Pyramid Filter Case Japanned. 91 Scrap.1.4.2......142 Py149 Spatulas................ 142 Pyle's " Sponges................. 142 " SpongyrV................ 199 " Spoons................. 142 Qualitative and Quantitative Sets.227 " Tips.................... 14 2 Qualitative Blow-pipe Sets- 228 " Wire...143 Qualitative Chemical Set of AppaPlattner's Apparatus for Blow-pipe ratus 221 Assay....................227 Qualitative Chemical Analysis, StuPlattner's Blow-pipes26....dn St........ 23 Crucible Moulds........ 60 Quetschahne140141 " Charcoal Borer......... 43 Quick Filtering Apparatus 89 Porcelain Capsules..... 41 Quiled Receivers 150 Mixing Capsule........129 Quantitative Urinary A;aysis...221 " Roast.-.1.2.....152e Set- 22 " Sieves......156Chemical Students Set-23 " Triangle...............172 Quevenne's Cremometer57 Pliers............................143 Pluminbago Crucibles and Covers... 58 R. Pneumatic Apparatus............. 247 Radiator Leslies C4 Cistern - 143 Ramelsber's Burette34 Pumps, various....143, 144 Hot Air Bath 72 " Troulsll various 1 145 Rasps -......149 Pocket Compasses-.........q~2 Reagents, list of -.........183 Poelons Fire clay - -_ - -9 Reagent Boxes —-------— 149 Polariscope-............176 "4 6 with Blow-pipe.... 149 Polarization Apparatus. --- 145, 146 " Chests ---------— 149 Pomades Glass -..........146 Receivers, Florentine -.......1,50 " Porcelain- -i........ ",Q Eartheu Ware - 151 Porouis Cups............43 " Porcelain - 151 Porous Plates-...........143 " Plain-..........149 Porter's Dessicator.. -.......65...Q..illed - 15 Potash Bulbs, various-.........147 " Tubulated - -150 -' Piete - - 4 Tubula~ted& Stoppered.150 Powder Scoops - -.........155 ~ Tubulature at the side.-150 Spoons. - 157' " with Rod, Hook & Ball. 247 Prat-Dumas' Filterinig Paper..-..91 Reduction Tubes -151 Precipitating Glasses- - 147 Reflectors - - 139 Preparation Glasses, Flat Bottom.. 147 Relative Value of Weights and "Round Bottom. 173 Measures.-250 Jars, Various.-.119 Relative Value of Troy French Pressure Boards for Gas Bags....104 Weights-.............250 Prince Rupert Drops-........153 Retorts,7 Clark's................151 Prisms, Acromatic - -.........148 " Copper --- ------— 152 It i Mounted -.....245 " double bulb in the neck.. 151 " for Dark Chamber -....147 " " tube -.......151 Equilateral - 148 " Faraday's - 151 Mounted —.245 " Iron —--------- 15 2 " Hollow -.........147 " Miebrochemical - 152 "1 Bottle-.......147 Lead -- 152 " Flint Glass.........147 Plain-...........151 " Nicol's... 1 48 " Pl atinum - 152 Proof Glasses............ 148 Relative valuLe, French Metre, Litre, Pulse Glasses — 148 andGrme.20 Pumps, forcing.. - 148. Retorts, Porcelain..152 INDEX. 263 PAGE PAGE Retorts, Tbulated and Stoppered Scorifier Tongs............... 171 ~~~of Glass.-151 Scorifying Moulds..155 Retorts, Stoneware..152 Scratch Brushes.................. 155 Et Funnels 96 " Brush Wire... 15 Supports........165 Screen for Tripod................. 155 Revolving Electro Magnet.. 78 Screws, Brass head................ 155 Reverberatory Furnaces- 100 Sefstrom's Forge................241 Riders of Aluminum.....- 152 Seidlitz Powder Cups............. 155 Riess' Electrical Condenser. - 53 Separating Bottles....... - 30 1Rings, Concentric -152 " i F unnels... 96, 97 Straw-.....161 Sets of Solids...-244 Roasting Charcoal 152 " of Apparatus, various.214, to 231 it forms -.153 Serrin's Lamps................... 62 It Dishes. - - 152 Shades Glass, Lily................ 155 Roasts, Platters — 152 Sharpeners for Knives.. - 155 tRods of Glass, Electric.. - 53 Shellbach's Support............... 165 " ~Glass.- ~.153 SievesBolting Cloth............ 156 Rod of Shellac, Electric153 " Box, Griffin's.............. 16 RodsS160 " Brass.................... - 155 38 " Horse-hair -155 Ros CrtallographicModels 48 " Plattners.................156 Rubber Bals... - 153 " Silk............156 Finger Tips. - 153 Sieman's Ozonometer.. 138 "~ Gloves.. - 110 Silicated Filter.-89 it"~ Sheet -153 Sillimaun's Chlorine Gas Apparatus 46 Stoppers-...153 Silver Assay, wvet vway Stopcocks.. 160 Sh Primers. 153 " Pure, for Mineral Tests.. 156 rinals..53 " Capsules.............. 40 Ru7mkorff's Coils.8 " Crucibles.. 59 ~Rupert Drops.. 153 Simpson's Nitrogen Bulb......... 49 Russian Spirit Lamps.154 Slips of Glass. 156 "t Porcelain..156 S. ~~~~~~Smee's Battery..-_...80,Saceharimeters. -145, 146 it Ziucs.. -.-180 Saccharomneters -.-. 114 Smelling Bolttles..........149 Safety Funnels..97 Soda Paper.........~...156 Safety Lamp. - 64 " Cartridge Mould. —— 136 Sa~llerons~lembic. -...-. —- 12 Water Apparatus.......156 Salometer.154 Sodium Spoon. 156 Sand Burners-.. 38 "6 Flame Apparatus... - 156 Sand Baths, various........154 Soils, Analysis Apparatus.....83 "Crucibles ---------— 59 5 deil-Ventschke's Saceharimeter..145 Glasses, various..54Sofflets..109 Saussure's Hygrometers.......116 Spatulas Bone............156 Saw to Cut Charcoal........154 it Brass._...-_...157 Scales, Apothecaries........154 It Glass_.157 "t Button... 154 It Ivory............156 ItPrescription_._._. 154, 155 IC rn.5 Scale Pans...155 it Platinuin..... -.157 Scheibler' Apparatuis-...-..- 7 "I Porcelain. 157 it Colorimeter.... 39 it Steel, -various.......157 Schuister's Dropping Glasses. 7.-.11 Specific Gravity Balances. —— 16,17 Schulze Silt Apparatus...-. 83 "6 i Bottles.......157 Scissors, ordinary.. 155 it 4 it in cases...158 "1 Tinsmitlis'.. 153 "t " Flasks.. — -— 158 Schi 6tter's Apparatus for Analysis Spectra of Stars & Metals oii Charts 45 Carbonates-...12 Spectroscope, Browuniugs hand.... 158 Dessicator.. 65 " two prisms.158 Scoops, of horn... 135 Heidelburgr.158 Scorifiers, Freiburg_. 155 Spectroscopic Chart. 45 (I Urn shape. 1535 it Lamps for Alcohol..159 8lcorifier Holders, of Iron. 155 "C(I i Gas...159 II Moulds............. 136 4 Stands_.....159 264. INDEX. PAGE PAGE Spectroscopic Support, Mitscher- Supports, Mitscherlisch, for Examlisch's....-164 ination before the Spectroscope. 164 Spectroscopic Salts, inset — 4 Supports, Fresenit u. 48 Su4 Spectrum, Lantern for showing on Table- -164 Screen....159 Gay Lussac's............ 165 Spirit Lamps, various........122 Shelbach. 165 Spiral or Spotted Tube..159 Swedish Filtering Paper92 Spoons for Blowpipe. 15n9 Swimers- — 34 " Bone.................159 Sy " Brass159 Glass p............la..in.166159 " Desert- -.. 1i.5.......15966 Dipping, of Glass 159 Syringes, Fire, of Glass.166 " Horn-... Glass, small —.166 " IronMetallic................... 15966 " Leech -....-...159 Platinum.. —...... 142 T. " Porcelain. a................59 Table Supports' Tea, of Glass and Porcelain 159 Tables for Glass Blowers — 109 " Table.....................1.59 Tanks for holding Solutions — 166 Spreugel's Mercurial Pump......143 Tantalus Cup- -166 Squibb's Pinchcocks.- -.......141 Tapers to burn in Oxygen — 66 Stanhope Lenses — 24 Wax -.-.16624 Steatntight Determ'tn Apparatus.23, Teats, of Cork55 Sticks for breaking Glass, of Coal 159 Telescope - -166 Stills, of Copper.....160 Tellurian - -166 Stirrers, of Glass.................160 Telegraph Workin Model78 Stockhardt's Chemistry set..... 224 Clock Work8 Stool, Insulatingr —........ -160 Tests, Blowpipe226, 27 Stopcocks, Brass, various....160, 161 Test Chests149 " Earthe nware, various. 160 Dishes167 St. Claire de Ville Combustioll. Fur- Glasses, conical167 nace -- ~~~ ~~~50 " " Microchemical -.-.167 Stopcocks, Gl ass, various...160, 161 "Lead Measure.. - 167 " Silver wet wvay Assay...160 " Siev - - 6 Stoppers, Rubber - - 153 "Metals.............210 Storer's Combustion Furnaces.-_ — 49 "Marsh's Arsenic - -.......167 Storm Glasses.- 161 "Paper.. -.167 Stoves, Gas..- 161 "Soluttions - 183 to 205 " Kerosene - - 161 "Spoon withSpatula- -..._157 Straining Baskets, Earthenware..161 "Tubes, Bohemian- - 167 " Porcelain —161 " " French and German..167 "t Dishes 161 " " in nest. -167 Plates, Earthenware...161 " " on foot. ----------.167 Straw RingCs -- 16 1 "' stoppered - -.......168 Students Qualitative Chemical set-231 " Brushes.- - 32 Quantitative " 230 " Holders, Brass- -....168 Stubb's Forceps - - 94..........."94Wire..-......168 Streak of Mineral Tests....... 129.. 129 Wood- -....168 Students Chiemical Set-.. —-_ -224 "t " Supports -- -----— 165 Suction Tubes..-......... 98 Testing Slabs -- -----------— 168 Sulphuretted Hydrogen Gas Appar- Theatre Pautin - - - - ----------- 168 atus -.105, 106, 107 Thermo-Electric Pair........... —168 Sulphu~ric Acid Apparatus- -....9 " " Pile. —------ 168 i Testing Apparatus.233 Thermometers, Axillary. -.- —.168 Supports, Burette.. - - -_.. -162, 163 "t Beer —- --- -— 168 Crucible..__- - - -- -164 " Centigrade- -168 " Filter. —---- -----— 164 "t Chemical- -.....168 " Funnel. - - 164 " Day and Night....169 " Griffin's - -.........164 " Differential - —.169 " Hoffinan's'.-._.- _.163, 164 " Fahrenheit- -....169 "t Retort..- -.......165 "t House.~..- -.....169 it Test Tube. -- -... _164, 165 " Medical- -...... 69 Japanned for Flasks....16,5 "4 Metallic.........169 INDEX. 265 PAGE PAGE T~rmometers, Sugar House,... 169 Tubes, Vogels......174 Window.. - 169 Tubing Barometer 174 Milk Glass Scale. -.169 " Bohemian.........174 Milk Scale....169 " Capillary................. 174 Paper". 168 " Colored...................174 Reamur —-- 169 " Combustion.............. 174 Thermometer Tubes169 " Earthen...... 176 Thieves. —--— 169 " French..............174 Thompson's Electrometer. 83 " Free of Lead......... - - 174 Tunder House.....170 " Lead..........174 Tin Foil. —--— 170 " Porcelain.................176 TissuFigure170 " Thermometer...176 Tongs, Coal......170 " Rubber, Black............176 Crucible......170 " Vulcanized............ 176 Cupelle ------- -170 Turmeric Paper..............176 Scoritfier_...__~ 171 Twaddle's Hydrometers.......... 115 i~71Galvanized Irone....... 171 Twine................... 176 ~ German Silver.... 170 Iron.....170 U. ~ Niekleized_. 170 Universal Furnace......102 " Steel. —-170 " Hydrometer... 114 Tools for Blowpiping227 Universal Supports, Wood..... 165 Torricellian Experiment171 " " Squibbs'..250 ~Touries.~..171 United States Custom House AlcoTrays, Porcelain.171 holometers........... 10 " Lead..... -171 Upcast and Downcast Draught " Wood ------ --—...........7..M...1 176 ~Trellis top.....~172 Ure's Alkalimeter................ 13 Triangles, Blopipe 172 " E(udiometer............ 86 Glass7......17 Urinals, of Glass.............. 176 Porcelain.1.72 " lulber............ 176 " Wire.... —-----— 172 Urine Hydrometers. —------ 1 15 Trimming Hammers. —----— 111 66Test Apparatus Fl int's. 225 Trip~ods, Brass.............172 "9 Qualitative Analysis Test 44 Iron............172 Apparatus. —---------— 221 "4 Galvanized Iron. —-... —172 Urine Volumetric Analysis Appar46 Wrought IC. 17 atus. ---------------— 221 Troughs, Mercury............. 128 Combustion...........51 V. Tubes, Arsenic ----------.13 Vacuum Tubes...........79 Chloride of Calcium.....45 Vapor Index, Lippincott's......177 " Combustion..... 51 —-- ) Vases, Earthen...........177 Condensing.... 53 "Glass... —-------— 177 Connecting.........54 V Tubes.... —------------—.177 ]Delivery....... —---— 173 Vials, Honmeopatbic.. 1177 Drying...72 "Sample...177 Filling............98 Vogel's Gas Bottle Tubes. — -— 174 "t Gas...108 "9 Optical Lactonmeter. —-- 20 it Geissler's. ---- --—. — 78 Volumetric Analysis, Appanrattu - -f-1 219 " Julep ----—.. —-— 120 Von Babo's Sulphuretted H4 (roLiebig's Condensing....173 gen Apparatus. —------— 106 " for Musical Sounds. 173 Vomn Babo's Burner._ _..36." Phosphorescent.......173 Vulcan Burners..........38 Sealing. -173 Van Brunt's Electrical Condenser. 74 Spiral Electric. —- -— 173 " T.............173 W. " U —----------— 173 Washing Bottles........... 177 " U, with Bulbs........173 " " Faraday's.....177 U, with Draining Tribe. 173 - "1" Vogel's. 174 " " " " ~~~~~~and " \Tu1lff's -—. —180 Stcpcock...173 "t Gas Apparatus of PorceTubes, Specimen..1 73 lain...-109 "1 Vaccine..-........ 173. Watch Glasses, Bohemian.. -....177 266 INDEX. PAGE PAGM Waich Glasses, French...........177 Wire, Brass.......... 179 " Glass Holders, various..... 47 " Copper.......................17b " Makers Hammer..........11i1 " " Silk Wound...........179 " Springs..................177 " Gauge......................1 i Water Baths, Copper.............. 177 " Iron........... 180 Porcelain........... 177 " Magnesium..................179 " " Nickelized... 177 " Piano.......................179 Distillation Apparatlus.. (69 Will & Varrentrapp's Nitrogen Decomposition 232,'233, 239, 248 Bnlbs..........................137 " Freezing in Vacuo......... 95 Wirtemberg Syphon..............243 " Hammers.................177 Woulfi"s Alpparatus...............280 Weights and Pulleys..............244 " Bottles................31 " Various........178, 179 Worms, Condensing, various....54 Welter's Safety Tubes.. 97 Wurtz Distilling Apparatus..... 70 Whirling Table...................244 Wilson's Chemistry set........... 216 Z. Wild's Saccharimeter.............145 Zinc Filings......................180 Wollaston's Cryopherous........ 60 " Sheet.......................180 " Goniometer.......... 110 Zincs for Bichromate Batteries....180 Wetherell's Apparatus for deter- " " Bunsen's Battery........180 mining Carbonic Acid in Carbon- " " Grove's.......180 ates............................ 12 " " Emee's "....180