%^^''^* ^^r AGRICULTURAL APPARATUS "At the head of all the sciences and arts at fK- l,««j ^t • m. and progress, stands-not militarbmT th^ sc^lncr that ^'wn ^**"**': commerce, the art that accumulates wialth-but AGRICULTI R% ?u* mother of all industry, and the maintainer^f h^m^n Se^f?!^^^^^^^^^ II lllllhlli III III! lliMi mil iliMi Ml III! I in I 3 1924 084 895 485 Cornell University Library The original of this bool< is in the Cornell University Library. There are no known copyright restrictions in the United States on the use of the text. http://www.archive.org/details/cu31924084895485 AGRICULTURAL APPARATUS MANUFACTURED AND IMPORTED BY Central Scientific Co, 412 to 420 Orleans Street, CHICAGO U. S. A. SEPTEMBER, 1914 REPRINTED. JUNE, 1915 ALBERT R. MAN^l I-/BRAR\ A. H. McCONNELL, Prej. \ -p J.,,,;. . H. C. ARMS. Vice-Pre.. ~^ ' 1 fiRQ i-^- ROBERTS, Secy, l 'f)L> M C T J , '°\°'P°"ted '^^^ A.H.STANDISH,Tr.a.V^*) lar sie Lsi-gest cities. NOTE.— School warrants t ..;;;i:,.;; ; : ; - • - - ■ - - - -.h are not immedi- ately available, should, if loossiWe. toe resist,, cc yoro: - CENTRAL SCIENTIFIC COMPANY. CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. SOIL ANALYSIS INCLUDING PHYSICAL PROPERTIES OF SOILS Arranged Alphabetically. No. 9000. 9000. ABSORPTION APPARATUS, Moisture, for determining the power of dry soils to absorb hygroscopic moisture from a saturated atmosphere. A water-tight, water- proofed substantial wooden box with heavy cover so designed that it may be clamped air-tight to the box. (A metal box is not satisfactory, because it is so affected by temperature conditions that the results obtained have little or no value.) Wooden strips, not shown in the illustration, support the soil pans and have a device for hold- ing the strips of absorption paper which by capillary action absorb water, keeping the air within the box in a saturated condition. Complete with six soil pans $ 15.00 9001. SOIL PANS of zinc, 6% x 6% x 1% inches, as used in No. 9000 Absorption Apparatus. These pans are water-tight and will be found convenient for use in drying ovens. Each. .25 No. 9003. 9003. ABSORPTION APPARATUS, Heat, for absorption of heat by soils, as described by Stevenson & Schaub. This apparatus is used to compare the temperatures of various soils at different depths when the soils are exposed to the direct rays of the sun, and consists of four zinc boxes 4x4x8 inches deep, enclosed in a wooden box open at the top 4.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9005. No. 9006 (Shown with Nos. 9288 and 9289). 9005. ASPIRATOR, McCall. For studying the rate of the flow of water through soils of dif- ferent textures. This aspirator has no moving parts to cause errors from friction and the method of operation is exceedingly simple. The bottle is first filled with water to a definite mark on the scale and connections are made as shown in the illustration. The pinch cock is then opened and water allowed to run from the bottle until it stands at a much lower level. By noting the time required with different soils, the relative rate of flow is readily determined. Complete as illustrated, with metal support, but without soil tube or beaker $ 5.50 9005A. SUPPORT only of No. 9005 2.50 9005B. ASPIRATOR BOTTLE only of No. 9005. Complete with rubber stoppers, rubber tubing, and pinch cock 3.00 9006. ASPIRATOR, for determining the comparative porosity of soils by measuring the rate of flow of air through them under constant pressure. This apparatus consists essen- tially of a closed pressure chamber formed by a rubber diaphragm or bag placed be- tween a movable weight and a wooden base 15 inches in diameter. To the weight is attached a graduated rod, by reference to which definite quantities of air may be forced through the different soils under consideration. The pressure chamber is en- closed in a suitable easing for protection 15 00 For AUGERS see pages 24, 25 and 40. For BALANCES see pages 120 to 128. CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. SOIL BINS AND CONTAINERS No. 9010. No. 9011. 9010. 9011. SOIL BIN, of heavy metal, japanned oak, square front; with removable soil carrier. Size 10% X 11 X 21 inches. These soil bins will be found much more desirable than bins of wood, presenting a more handsome appearance at only a slight additional cost. Each $ 2.75 SOIIi BIN, strongly made of heavy galvanized steel with hinged cover and with angle steel reinforcements and legs, the bottom of the can being 4 inches from the floor. Size 22 inches by 30 inches by 30 inches high. Net 10.00 No. 9014. ,9014. SOIL CONTAINEB, made of galvanized iron, air and water-tight, with outside fitting cover; has a heavy steel band top and bottom, the lower one riveted through body and bottom; concave bottom raised 1% inches from ground; drop handles. Number 2 3 4 Size, inches 141/2 x 24 16 x 26 19 x 28 Capacity, gallons 17 22 32 Price, each, Net 2.25 2.50 3.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9016. S016. SOIL CONTAINER, of galvanized steel fitted with wheels and handles for wheel- ing about. Very convenient in transporting soils from one part of the laboratory to another. "With cover. Number 13 1* Size, inches 16 ^ 26 19 x 28 Capacity, gallons 22 32 Price, each, net. $3-50 4.00 No. 9018. No. 9019. ^^yf" No. 9021. 9018. 9019. 902L SOIL CONTAINER, of heavy galvanized iron, with handles and cover; will hold half- bushel. Each For other SOIL CONTAINERS see PANS, page 22, and SAMPLE CANS, page 27. SCOOP, of metal, retinned, for use in handling soils; size, 8 by 5% inches BOTTLE, Mechanical Analysis, convenient for separating soils into their constituent parts, as described in Hosier and Gustaf son's "Soil Physics Laboratory Manual." Complete with inverted rubber stopper and tubes -• $ 1.00 .22 .50 CENTEAL SCIENTIFIC CO., CHICAGO, U. 8. A. CARBONIC ACID APPARATUS No. 4691. No. 4692. 4691. ALKALIMETER, Bunsen's 4692. ALKALIMETEE, Geissler's 4693. ALKALIMETEE, Schroedter's 4694. ALKALIMETER, Mohr's, latest form 4695. CARBONIC ACID APPARATUS, Knorr's. 141) No. 4693. (See deseription and illustration on page Net 6.75 Nos. 9029 and 9033. 9029. CENTRIFUGE, Soil, for preparing soil samples for Mechanical Analysis. This ma- chine is of excellent design, having features suggested by agronoHiists. The motor is mounted with shaft vertical, thus obviating considerable vibration and allowing easy access to the soil tubes. A brass trunnion arm, mounted on this shaft, carries eight soil tubes, which are of heavy well annealed glass and are encased in alumi- num sheaths. These sheaths are held in trunnions to the trunnion arm by hardened steel bearings. The whole is protected by a metal covering, which extends to the floor or table on which the motor rests, access to motor and tubes being gained by means of a hinged cover. Complete with % H. P., 110 volt, 60 cycle, A. C. motor, of 1800 E. P. M. no load speed, ready for mounting on a table top, and eight soil tubes Net 75.00 9030. CENTRIFUGE, Soil, same as No. 9029, but with % H. P., 110 volt D. C. motor... Net 70.00 9031. CENTRIFUGE, Soil, same as No. 9031, but with 220 volt D. C. motor Net 75.00 9032. EXTRA SOIL TUBE, heavy glass, as used in Nos. 9029 to 9031 Net .15 9033. PLANK BASE, on which any one of the machines from No. 9029 to No. 9031 may be mounted. Substantially made of hardwood, 36 x 36 x 1% inches 7.75 9034. CENTRIFUGE, INTERNATIONAL, see page 190. 10 (;ENTRAL SCIKNTIFTC ro., rHICAGO, U. S. A. No. 9036. 9036. CENTRIFUGE, Moisture Equivalent, Briggs-lVrcLaiie, as described in the Proceedings of the American Society of Agronomy, Volume 2, 1910. This centrifuge is used for determining the relative moisture equivalents of soils where the term moisture equivalent designates the maximum percentage of moisture which a soil can retain in opposition to a known centrifugal force. For a standard of compar- ison, a centrifugal force equal to 1,000 times the force of gravity has been adopted. In making the determinations, the soils, suitably moistened, are placed in cups with perforated bottoms. These cups are then placed in the cylinder of the centrifuge and rotated at a constant speed, so chosen as to develop the required centrifugal force. ' ' Each soil now loses water until the capillary forces have increased sufficiently to balance the centrifugal force acting on the soil moisture. Since the moisture con- tent of each soil which has been treated in this way is in capillary equilibrium with the same force, it follows that if these moist soils are placed in contact in any order whatever no movement of water from one soil to another will take place. A condition of complete equilibrium exists throughout the series of soils thus treated. " It is then necessary only to determine the moisture content of each soil corresponding to this condition of equilibrium in order to determine its quantitative position in the scale of moisture retentiveness. The centrifuge here described is capable of maintaining the required centrifugal force well within the desired limit of accuracy. The instrument consists of a bronze disc cylinder containing 16 soil boxes with wire gauze bottoms, and attached to the shaft of a vertically mounted 110 volt D. C. motor. The motor is provided with a Kellogg Constant Speed Governor and a Frahm Tacho- meter (not shown in the illustration) is supplied which has a range from 2380 to 2500 thus bringing the desired point of speed, 2440 R. P. M., about the middle of the dial. Complete as described -^^^ a ^g^ qq 9037. CENTRIFUGE, Moisture Equivalent, Briggs-McLane, same as No. 9036, v/ith 220 volt ^- ^- '^°^°' Net 201.00 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 11 No. 4753. No. 4754. 4753. COLOEIMETEE, Schreiner's, as used in the Laboratory of the Bureau of Soils, United States Department of Agriculture. After designs by Oswiald Schreiner. All parts of the instrument which come in contact with the solutions are of glass. Broken parts can readily be replaced. The Colorimeter consists essentially of two graduated glass tubes which contain the standard and the unknown colorimetric solution, with two. smaller glass immersion tubes by means of which the column of liquid in the graduated tubes may be changed. These tubes are mounted on the colorimeter stand by an improved method which makes their adjustment exceedingly simple and permits a rapid and easy setting while the comparisons are being made. ' ' To make the comparison, the standard colorimetric solution is poured into one of the graduated tubes and put into place in the camera, together with the immersion tube. The unknown colorimetric solution, made up to definite volume, is put into the other graduated tube and similarly placed in the instrument. The tube containing the solu- tion of unknown strength is set at a convenient height, say 40 scale divisions, and the other tube containing the standard moved up and down, the operator watching the efCeet on the images in the mirror through the opening at the front of the camera. By moving the standard tube so that the image is alternately weaker or stronger than that of the unknown solution the setting can be accurately and quickly made. When both images show the same intensity of color the setting is read by noting the division mark on the graduated tube opposite the ground bottom of the immersion tube." For full description see "Journal of American Chemical Society," Volume XXVII, September 9, 1905, and "Bulletin No. 31, United States Department of Agri- culture, Bureau of Soils, ' ' from which the above quotation was made. Complete with graduated and plain tubes $' 16.65 4753A. TUBES, Graduated, of No. 4753, per pair 3.30 4753B. TUBES, Immersion, of No. 4753, per pair .90 4753C. COIiOBED GLASSES, Lovibond's Standard, to fit No. 4753 Colorimeter, each ] .50 4754. COLOKIMETEB, Duboscct's. For comparison of colors in liquids. The observations are made by means of a monocular telescope which gives a circular divided field, thus elim- inating the errors due to the difference of vision between the two eyes of the operator. The adjustment of colors is obtained by means of a rack and pinion which immerses the glass cylinders more or less in the liquids, the movement being registered upon a scale Duty Free 50.00 12 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. I No. 9041. 9041. COMPACTING MACHINE, designed for obtaining uni- form compaction of soils in tubes 18 inches or less in length and 4 inches or less in diameter. It consists of two uprights having sockets at their lower ends for attachment to the floor and a cross bar with wall attachments at their upper ends. A cross bar fastened rigidly to these uprights carries a rotating tube socket or holder which is rotated by means of a crank. Twice during each revolution the tube is raised to the height of % inch by means of inclined surfaces under the tube holder, and automatically dropped, which process jars the soil into position. A small "propeller" is attached to the end of the rod extending down from the sliding cross bar. This "propeller" is placed at the bottom of the tube to be filled and soil then poured into the tube. Twice during each revolution it drops with the soil tube, thus striking a definite number of blows on the soil column as it rises. This compactor is built to compact soils to approximately the same condition in which they are found in the fields and to give uniform compaction for comparative tests. It is simple in principle and does its work quickly and easily. With two propellers (one for 2-inch tubes and the other for 4-inch tubes) weight holder, and weights. $ 25.00 No. 9042. 9042. COMPACTOR, Spring Boaid, necessary for compacting soils in glass tubes. Base of wood 8x24 inches; spring board firmly fastened to base at one end; massive slip- weight slides on nickel-plated rod. A very substantial and well-finished piece 5.00 CENTEAL SCIENTIFIC CO., CHICAGO, XJ. S. A. 13 No. 9053. 9053. CONDUCTIVITY APPARATUS, for determining tlie thermal conductivity of soils. This design has been modified from the original design in use at the University of Illinois Soils Laboratory. A galvanized iron soil tray, 16x4x5 inches, has at one end a water-tight boiling tank, 4x4x5 inches. Attached to this tank is a heating coil, as shown in the illustration, by which the water in the tank can be kept at the boiling point indefinitely. By this method of heating, the errors present in the old apparatus due to direct heating from the flame are entirely avoided. The boiling tank is provided with tubulatures for thermometer, and for reflux condenser which may be used if desired. Complete as illustrated $ 5.00 No. 9054. 9054. CONDUCTIVITY APPARATUS. Similar to No. 9053, but without heating coil and with an electrical heating. unit. This method of heating was suggested by the Depart- ment of Soil Technology of the New York State College of Agriculture at Cornell University and has proved very satisfactory. For 110 volt current, either direct or alternating For CONDUCTIVITY BKIDGE see page 32. 9.00 9059. DIGESTION CUPS, porcelain, for acid digestion of soils (Hilgard's Method). Number 1 2 Capacity, c.c 50 90 Each, Net .35 .40 No. 9059. 14 CENTRAL SCIENTIFIC CO., CHICAGO, U^ 8. A. NO. 9063. No. 9065. 9063. DEAINAGE and WATER TABLE APPARATUS, Graham & McCaU's, designed to show the behavior of capillary and free water in the soil, and the principles involved in the proper construction of a barnyard to prevent loss of plant food; of copper, 3x, 6 X 12 inches high, with a solid bottom to represent hard clay or stone. Through the vessel are two brass tubes, sawed transversely, which communicate with the out- side, representing tile drains at difEerent depths. A standpipe shows the height of free water inside the vessel. To operate, fill the vessel with soil and pour on water at regular intervals, giving it time to soak into the soil. The water, instead of coming out at the tubes, will pass downward through the soil until the solid bottom is reached, when a water-table of free water will be formed at a height indicated by the free water in the glass stand- pipe. When the free water has risen to the first opening it will pass outside the vessel, thus proving that a tile drain placed as low as soil conditions will permit removes free water before one placed not so deep. Some Things Which the Apparatus Will Shew: Tile drains do not remove capillary water. A deep drain removes the first water. No water is removed until the soil at the drain line is beyond the point of satura- tion. The volume of soil available for plant food is greater in a drained soil. The volume of soil retaining capillary water is greater where the drains are deep. Plant food would not be wasted by leaching from a barnyard having a tight floor of clay or cement and some kind of retaining wall around the outside $ 5.00 For DRYING OVENS, see pages 157 to 161. 9065. ELUTRIATING FLASK, Benningsen's. The bulb has a capacity of about 400 c.c, and the neck is gradu- ated to 40 c.c. in 1 c.c. divisions 1.25 9068. EVAPORATION GAUGE, micrometer screw form, for measuring rate of evaporation, as described in Bige- low's "Manual for Observers in Climatology and Evaporation" (U. S. Weather Bureau No. 409). A micrometer screw is mounted on a cap suitable for supporting it on the top of a still well 3 inches in diameter. The screw proper is 5 inches long with 20 threads to the inch. The micrometer head is graduated in 50 divisions so that readings may be taken to 1/1000 of an inch. For convenience in reading a linear scale graduated in 20ths of inches is provided. The total distance from the head to the end of the pointer, which is of incorrodible material, is 12 inches. The pointer may be un- screwed and a hook screwed in its place, thus mak- ing the instrument serve as a hook gauge. Com- plete as described, with pointer and hook 10.00 For EVAPORATION TANK, see next page. CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 15 No. 9069. 9069. EVAPOBATION TANK, for use with No. 9068 Evaporation Gauge, of heavy galvan- ized iron 6 feet in diameter by 2 feet deep.. A still well 3 inches in diameter is firmly attached to one side of the tank and connected with the tank at the bottom by a galvanized pipe of sufiacient size to allow free flow of water between the tank and still well $ 25.00 Note — Tanks of different dimensions can be furnished if desired. No. 9071. 9071. EVAPOKIMETER, for determining the amount of water evaporated from the surface of various soils in a given time; for determining the effect on evaporation produced by different fertilizers, and different methods of cultivation. It consists of a brass tube 4 inches in diameter and 9 inches long having a perforated metal bottom to allow free ingress of water. This tube fits into a water-tight spun brass base. In operation the tube is filled with soil which is compacted by means of the Soil Compacting Machine (No. 9041). It is then placed in position in the base. Water of known weight is placed in the base whence it passes through the perforated bot- tom of the tube to the soil and is evaporated from its surface. The apparatus is entirely of brass, durably made, highly polished and lacquered. . . . 9072. EVAPORIMETBE. Same as No. 9071, but with brass tube 18 inches long 9073. EVAPORIMETBE, for finding the co-efacient of evaporation from soils. The soil con- tainer is of copper with brass bottom perforated with 1 millimeter circular open- ings. This container is placed in a copper water jacket 3x8 inches 3.35 4.25 2.25 16 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9078. No. 9078. (Cross-section.) No. 9080. 9078. 9079. 9080. FILTER, Briggs' Design, for the filtration of soil solutions, as described in Bulletin No. 31 of the Bureau of Soils. Made of brass, nickel plated outside, silver plated inside, and therefore especially suited for plant culture experiments. Capacity of reservoir approximately 800 c. o. Complete with Pasteur-Chamberland Filter Tube. . FILTER, Briggs' Design, similar to No. 9078, but of iron, porcelain lined. Capacity of reservoir approximately 750 c. c. Complete with Pasteur-Chamberland Filter Tube ; FILTER AND PUMP, Briggs' Design, for field use. Consists of a filter similar to No. 9078, but having a reservoir of only 250 c. c. capacity. Mounted on a base with a compression pump and air tank. Complete as shown in the illustration $ 10.00 1.35 16.65 9081. 9082. 9083. No. 9081. FILTER FIELD SET. Consists of an air reservoir of 10 gallons capacity, with pres- sure gauge and four No. 9078 filters mounted as shown in the illustration. -Complete with special compression pump 75.00 FILTER FIELD SET. Same as No. 9081, but with four No. 9079 filters 68.00 FILTER TUBE, Pasteur-Chamberland, French make, for use with any of the above filt"''^ Net 2.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 17 9090. 9091. 9092. 9094. No. 9090. No. 9094. 9094A. 9095. 9095A, 9096., 9096A 9097. .Net 22.00 35.00 FUBNACE, Muffle, for all work where exact temperatures are desired not exceeding the fusing point of copper. May be operated with illuminating gas, natural gas, or gaso- line gas without alteration. Complete with muffle, dome, crucible tongs and 6 feet of chimney pipe and burner. Inside muffle space 3x4x2% inches high; requires % inch clear bore gas pipe and tap; clay parts 7% x 7% x 8 inches high; inside space 5% x 5% X 5% inches high. Height from table to top of lid, 16 inches Net $ 17.00 FUBNACE, Muffle. Same as No. 9090, but inside muffle space 3% x 5% x 3 inches high; requires %-inch clear bore gas pipe and tap; clay parts 10x9x11 inches high; inside space 7% x Sy^ x 5% inches high; height from table to top of lid 19% inches Net FtJENACE, Muffle. Same as No. 9090, but inside muffle space 4% x 6% x 4 inches high; requires 1-ineh clear bore gas pipe and tap; clay parts 11% x 10% x 14 inches high; inside space 8% x 7% x 6% inches high; height from table to top of lid 23 inches. Net MUFFLES for above furnaces: Number 9090A. 9091A. 9092A. Each Net 1.25 1.50 1.75 FtTRNACE, Electric Muffle, with heating element of nickel chromium wire. This wire is wound on an alundum muffle which is surrounded by a packing of special heat-insulat- ing material enclosed in a sheet-iron case. Dimensions of chamber 3% inches wide by 2% inches high by 5 inches long. Maximum working temperature 1000° C.; for 110 volt direct or alternating currents. Consumes 800 watts. Accurate temperature regulation is accomplished by means of a r'heostat which is the only auxiliary apparatus required. This furnace is useful for ash determinations, ignition of precipitates, incinerations, fusions, combustions, enameling, hardening and annealing small parts, melting alloys and metals, etc. Complete with rheostat Net FURNACE, Electric Muffle. Same as No. 9094, but without rheostat Net FUENACE, Electric Muffle. Same as No. 9094, but with power consumption of 1250 watts and chamber dimensions 4% inches wide by 3 inches high by 8 inches long. Complete with rheostat Net FUBNACE, Electric Muffle. Same as No. 9095, but without rheostat Net FUENACE, Electric Muffle. Same as No. 9094, but with power consumption of 2400 watts and chamber, dimensions of 5%, inches wide by 3% inches high by 9 inches long. Complete with rheostat • Net FUENACE, Electric Muffle. Same as No. 9096, but without rheostat Net FUENACE, Electric Muffle. Same as No. 9094, but with power consumption of 4150 watts and chamber dimensions of 7% inches wide by 5% inches high by 11 inchos lo^ng.- Complete with rheostat. 43.00 35.00 60.00 50.00 85.00 65.00 9097A. FUENACE, Electric Muffle. Same as No. 9097, but without rheostat Net NOTE. — ^Furnaces of the above type can be furnished in other voltagea up to 250. 110.00 80.0C 18 e'llNTEAL SCIENTIFIC CO., CHICAGO, U. S. A. Copyright, 1904, by Abbe Engineering Co. No. 9100. For MICROSCOPES see pages 154 to 156. 9100. MILL, Ball, for grinding to an impalpable powder any materials either hard or soft, particularly those which must not come in contact with metal. Balls of porcelain are used in a porcelain drum, which is tightly closed by a clamped lid. With jar 8.75 by 9.65 inches, which will handle from a few ounces up to 5 pounds; requires a floor space 10% by 25 inches. Complete as illustrated, for hand power Net $ 30.00 9102. MILL, Ball, same as No. 9100, but with pulley for power Net 35.00 9104. BALLS, Porcelain. Per pound .25 9112. ^^iss:^ No. 9110. No. 9112. 9110. MILL, Grinding and Pulverizing, for pulverizing soils ready for sifting. Will also grind dry bones, corn, rock phosphates, etc. Height 11 inches, length 12 inches width 9 inches, dimensions of throat 3x2 inches, wheel 19 inches diameter, weight 471/2 lbs. Compact, strong and durable This Mill can be furnished for power fitted with 12x3 inch single ' pulley " for' $5 00 extra, or with double pulley for $10.00 extra. MILL, Grinding and Pulverizing, suitable for grinding soils, grains, coal, dry bone, limestone, etc. Will pulverize limestone fine enough to pass through 100-mesh sieve Three sets of grinding discs, coarse, medium and fine. Total weight, 24 pounds 7.S( 7.5( CENTRAL SCIENTIFIC CO., CHICAGO, 17. 8. A. 19 No. 9114. 9114. MILL, Grinding and Pulverizing, same as No. 9112, but larger and for power drive. Weight 65% pounds, height 24 inches, length 13 inches. Pulley 12 inches by 2% inches, speed of pulley 300 E. P. M. Power required 2 to 3 H. P $ 50.00 No. 9116. J 116. MILL, Grinding and Pulverizing, with automatic feed, adapted for grinding soils, coal, sand, gravel, stones, grit, etc., etc. Will take large material and run either way, to the right or left. The automatic feed is used for small material, while larger pieces are fed directly into the mill. Pulley 8 inch diameter for 4 inch belt; speed 600 to 1000 E. P. M. Weight 420 pounds; height 3 feet 10 inches; floor space 23x29 inches; distance from floor to shaft, 24 inches 60 00 20 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A No. 9117. 9117. MILL, Grinding and Pulverizing, made especially for pulverizing hard substances. Will take in material the size of shellbarks. The grinding surfaces are made of very hard material. Hand wheel, 20 inch diameter; weight complete, 22 pounds. . . .Not $ 9.00 9118. MILL, Grinding and Pul- verizing, Merker's. (Eeoora- mended by "Wiley in his ' ' Princi- ples and Practice of Agricultural Analysis," Vol. 3, Page 4.) A very efficient Mill for grind- ing coarsely shredded fodder, hay, and straw, to a fine state. The burrs consist of a cast steel rotat- ing mortar, 15 cm. diameter, with a ribbed bottom and a pestle 8.5 cm. diameter, fixed with wheel at- tachment to produce rotary move- ment of the pestle in an opposite direction to that of the mortar. Complete for hand power. Duty free $100.00 9119. MILL, Grinding and Pul- verizing, Merker's, same as No. 9118, but equipped for belt power. Duty free $80.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 21 No. 9125. No. 9129. > 19125. MULCH CYLINDER, McCall's, for determining the eifect of mulches upon the rate of evaporation from soils. Design as illustrated; of galvanized iion, 19 inches high; ap- proximate diameter at top 4 inches; at bottom 8 inches $ 2.00 9127. MULCH CYLINDER, McCall's. Same as above, but 29 inches high 2.25 9129. MULCH CYLINDER, Stevenson & Schaub's. Of galvanized iron 11 inches diameter by 13 inches high, with water supply tube 1.25 For NITROGEN DETERMINATION APPARATUS see pages 41 to 43. No. 9131. 9131. ORGANIC MATTER DETERMINATION APPARATUS, for determination of organic matter in soils by the wet combustion method (Bulletin No. 24, Bureau of Soils) . Con- sists of two flasks, two Mohr-Geissler Potash Bulbs, one Peligot Tube, two Winkler 's Spiral PotaslT Bulbs, Condenser, Dropping Funnel, rubber stoppers and connecting tubes 19131A. POTASH TXTBE, PeUgot 9131B. POTASH BULB, Winkler's 5174. POTASH BULB, Mohr-Geissler (C in illustraliou) 9131D. FLASK, Potassium Hydrate (Same as No. 4902 Flask, 6 07,.) 9131E. FLASK, Round Bottom (Same as No. 4902 Flask, 12 oz.) I9131F. FUNNEL, Separatory (Same as No. 4924 Funnel, 50 c.c.) • 19131G. CONDENSER (Same as No. 4773 Condenser, 15 in.) 8.35 .40 1.10 .75 .10 .14 .84 .95 22 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9132. No. 9135. No. 9137. 9132. OKGANIC MATTEB JAR. A l-gallon gla.s Jar provided with a round hole for drain- age 1 cm. m diameter, located 1 cm. above the bottom IT.' !t!' "' ""'''' "'*" *''"' '^*^^^*^^^/^ -<=^-- ^"^ - in Drying Ov^nr'Ea^h 9001. PAN. of zinc, 6%x6y.xl% in., as used in No. 9000 Absorption Apparatus. These pans are water tight and wi.l be found convenient for use in drying ovens. Each. yid7. PAN or BOX, of zinc, 4x4x4 inches, for volume-weight experiments. Each For SAMPLE CANS or BOXES, see page 27. $ 0.45 .20 .25 .40 No. 9139. No. 50, Bureau of SoTs ) ^^^ :''''°'^'^'^<'- "^ ^ ^^-p instrument. (See Bulletin referred to, but is suppled !thT ^^ """'""" ^' '''"'''''' '^ ^^^ ^""««" soil has be n pehtrat.d L tie , '• T" '°" '"^"^'^^ ^'^^*™^' '=°"*^«* -^- ^^^ Of the Universirof Cairn T , f '''' ^^ ^^^^^"^'^ '' ^^°^- "'^^^^^ ^- ^'^^ '-y 01 oaiitornia. Complete as illustrated Net 30.00 CENTEAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 23 No. 9142. No. 9144. 9141. PERCOLATION APPARATUS, McCall's, for determining pereolation of water through soils. Glass percolator, 1^/2 pint, with brass extension having lateral tubes. Com- plete with rubber gasket, copper gauze, etc $ 3.00 9142. PERCOLATORS, Oldberg's, heavy glass, narrow form, almost cylindrical. Capacity % pt. li^ pt. 2% pt. Each .30 .40 .50 9144. PESTLE, Rubber, for preparing soils for analysis; 7 inches long, wood handle with rubber tip .28 No. 9147B. No. 9147. 9147. PLASTICITY APPARATUS, for determining the effects of lime on plastic soils. Coa- sists of a clamp with two knife edges about 4' inches apart, across which the briquet to be tested is placed for breaking, a heavy canvas bag for holding weights and s'hot, and one No. 9147A Mold, 5 inches long, 1 inch wide and % inch deep, as illustrated. For those who wish a mold of more accurate dimensions, the purchase of No. 9147B Mold described below, is recommended. (This design has' been developed from the ' original in use at the University of Illinois, in co-operation with the Soil Physics staff of the University.) 9147A. MOLD only of No. 9147 9147B. MOLD, improved form, for No. 9147, as suggested by A. F. Gustafson of the Uniyer- sity of Illinois, identical and ah obtained are ac length, 5 inches 1.65 ,15 .67 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. SAMPLING APPARATUS ITos. 9164 and 9155. !U.52. SOIL AUGEB. (See piige 183.) 9154. SOIL AUGER for obtaining soil samples. Length 36 inches with graduations every 6 inches; handle detachable; steel cutting edge IVa inches in diameter. The length may be increased to 72 inches by the insertion of No. 9155 Extension. Complete with handle but without additional length 9155. EXTENSION of 36 inches for use with above auger No. 9156. 9156. SOIL AUGER, improved form with stem and handle of smooth finished steel. The han- dle is attached by means of a lock nut of new design which entirely does away with the loosening and tightening up at the joint which has caused so much diffi- culty in the earlier types of Soil Augers. This Auger has been made 24 inches long for convenience in carrying when in the field. For use at greater, depths ex- tensions 2 feet long and 4 feet long have been provided. (See Nos. 9159 and 9159A.) The auger bit is 1% inches in diameter and the stem is graduated every 6 inches. This is a thoroughly high-grade tool for the most exacting service 9157. SOIL AUGER. Same as No. 9156 but with auger bit 2 inches in diameter.. No. 9158. 9158. SOIL AUGER with Sleeve, for use in dry soils. This Auger is the same as No. 9156 except that it is provided with a steel sleeve which fits over the auger bit, resting on a projection at the lower end so that the diameter of the cutting edges is larger than the outside diameter of the sleeve. This sleeve is held firmly in posi- tion at the upper end by an ingenious locking device and serves to hold in posi- tion the dry soil which otherwise would not cling to the Auger when removed from the ground. 2 feet long, graduated every 6 inches. Complete with sleeve and handle CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 2S No. 9159. 9159. EXTENSION, for use with Nos. 9156 to 9158 Soil Augers. Complete with lock nut. Exactly 24 inches long and graduated every 6 inches $ 2.25 9159A. EXTENSION, for Nos. 9156 to 9158 Soil Augers. Same as No. 9159 but exactly 48 inches long 3 qq No. 9160. 9160. FOOT PLATE, for use with any Soil Auger 2 inches or less in diameter to prevent the crumbling away of the soil around the edge of the hole. Consists of a steel tube slightly over 2 inches in diameter provided at the upper end with a steel plate about 4.5 X 10 inches. The tube is driven into the ground before the sampling hole is started and the Plate makes a convenient rest for the feet during the entire operation of removing samples 2.00 No. 9161. 9161. CARRYING CASE, for Auger Field Set, substantially made of hard black fiber with lock and clasps, and handle for carrying. Compartments are provided for holding one No. 9156 Auger (or one No. 9158 Auger), one No. 9157 Auger, two handles for the above, four No. 9159 Extensions, and a wrench for the lock nuts. Complete with Wrench, but without Augers or Extensions Net 9161 A. AUGER FIELD SET, consisting of No. 9161 Carrying Case with wrench, one No. 9156 Auger, one No. 9157 Auger, and four No. 9159 Extensions Net 9161B. AUGER FIELD SET. Same as No. 9161A, but with No. 9158 Auger instead of No. 9156 Net 5.00 22.50 24.00 26 CENTRAL SCIENTIFIC CO., CHICAGO, IT. S. A. (S No. 9162. No. 9168. 9162. 9164. 9168. SOIL SAMPLING TUBE, King's. Tube of brass, 5 feet long, graduated every 6 inches. Cutting head of steel with area of opening one-ten millionth of an acre. Steel collar at top to receive blows of hammer shown at left of illustration. This hammer is of cast iron, weighing 8 pounds, and is of suitable shape to be held easily in the hand. To obtain soil samples the tube is driven into the ground to the desired depth by means of the hammer. A column of soil is thus forced up into the tube from which it is jarred after removal from the ground. The outside of the cutter being larger than the tube allows it to be drawn from the ground more easily. If, however, the tube is not withdrawn from the ground with sufacient readiness. No. 9170 Tube Hoist should be used. With Hammer • SOIL SAMPLING TUBE, King's. Same as No. 9162, but 3 feet long. With hammer SAMPLING TUBE BBUSH, for cleaning Nos. 9162 and 9164 Soil Sampling Tubes. Bristle brush, with strong wire handle. Total length, 65 inches $ 6.65 No. 9172. 9170. 9172. 9173. 9176. SOIL SAMPLING TUBE HOIST. This contrivance will fill the need for some device for removing Soil Sampling Tubes froijni the ground. Movement is imparted upward on the handle and, the leverage being ample, no great eflEort is needed to remove tubes from the most solid soils. Hoist only, without Sampling Tube SOIL SAMPLING TUBE, Whitney's. Especially useful for obtaining samples for determination of moisture content and nitrifying power of soils; a brass tube 9 inches long, sharpened at one end and with a mark 6 inches from that end, pro- vided with rubber" caps for closing each end air tight SOIL SAMPLING TUBE, Noyes' Bacteriological. (See page 183.) SAMPIiING CLOTH, 18 x 18 inches, for receiving soil samples from Soil Samplers. Im- pervious to moisture. Per dozen See also No. 9273 SPECIFIC GRAVITY TUBE, page 39. 6.6 .4 1.6 CBNTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 27 9178. SAMPLE CARRYING OUTFIT. The inconvenience of cumbersome fruit jars and soil bags is done away with in the design illustrated. A neatly finished carrying case, with door and handle, holding one dozen seamless tin cans of one pint capacity, with tight-fitting lids. (See No. .9178A.) The uitability of these cans for drying pans makes this an economical outfit, since special pans for the drying oven are not needed. Complete with one dozen cans 178A. SOIL SAMPLE CANS, Seamless Tin, same style as used in No. 9178. Capacity, ounces 4 8 16 Per dozen .22 .33 .55 $ 3.35 ng, No. 9183. No. 9183A. No. 9184. No. 9184A. No. 9187. 9183. SOIL, SAMPLE CANS, Aluminum, with aluminum screw top, as described in Clem- ents' "Besearch Methods in Ecology," 2% inches in diameter by 2% inches high. Each ■ 45 9183A. SOIL SAMPLE CANS, same as No. 9183, but with can and cover numbered. In ordering state what numbers are desired. Each .50 9184. SOIL SAMPLE CANS, Aluminum, with aluminum top. The diameter of these cans is uniform so that the cover fits the bottom of the can, making it possible to keep can and cover together while the can is open. Number 1 ^ Diameter, inches ■ 2 2% Height, inches % 1% Each -11 -15 9184A. SOIL SAMPLE CANS, same as No. 9184, but with can and cover numbered dering state what numbers are desired. Number ^ Diameter, inches J Height, inches -^ Each • -16 !9187. SOIL SAMPLE JARS, Glass, with metal screw cap, capacity 4 oz. Per dozen , .55 2 2V, 1% .20 Per dozen. 3 2 .20 In or- 3 2 .25 £8 CENTBAL SCIENTIFIC CO., CHICAGO, IT. S. A. No. 9190. 9190. SHAEEB, Chest of Drawers Design, for preparing soils for mechanical analysis. Es- sentially as described in Bulletin 84 of the Bureau of Soils, but with hinge mount- ing similar to that described under No. 9192 Shaker. (See page 29.) The gearing is of the enclosed type and is arranged to be belted to any % H. P. motor having V-groove pulley. The chest is substantially made of hardwood nicely finished, and has six drawers each with eight compartments for holding No. 9191 Sterilizing Bot- tles. Complete on a massive hardwood base with forty-eight No. 9191 Sterilizing Bottles, but without motor. (See below.) $ 55.00 MOTORS The following motors will be found satisfactory for use with No. 9190 Shaker. They are provided with "V" groove pulley for round belt. 9190A. MOTOR, 110 volt D. C, % H. P Net 9190B. MOTOR, 220 volt D. C, % H. P Net 2265K. MOTOR, 110 volt A. C, 60 cycle, % H. P Net The following motors will be found satisfactory for use with No. 9192 Shaker. (See next page.) They are provided with a "V" groove pulley for round belt. 2263W. MOTOR, 110 volt D. C, % H. P Net 2263WW. MOTOR, 220 volt D. C, % H. P Net 2265E. MOTOR, 110 volt A. C, 60 cycle, % H. P Net For other MOTORS see Catalog M. 24.50 25.50 29.50 15.00 16.00 22.25 No. 9191. 9191. BOTTLES, Sterilizer, capacity 8 oz. Per dozen .45 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9192. 9192. SHAEEK, Tray Design, for preparing soils for mechanical analysis. Two trays with compartments for eight bottles each are mounted on a wooden platform attached to a substantial wooden base by four hinged metal supports. The shaking movement is imparted through a worm gear mounted on the same base. Sufficient power will be furnished by a % H. P. motor. The trays are both made removable for conven- ience in handling and filling. Complete with sixteen bottles, but without motor. (For motor see preceding page.) * 30.00 No. 9194. 9194. SHAKEK, Soil Sieve. This shaker has been designed for use with No. 9200 Sieves (see next page) as described in Bulletin No. 84, U. S. Department of Agriculture, Bureau of Soils. A motor of 1/20 H. P. is mounted on the same base with an eccentric shaft, to which it is belted. The set of sieves is clamped m a frame at the end ot a long lever arm which rests on the eccentric. This lever arm is so attached to the eccentric that much of the noise which usually accompanies shakers o± this general type is done away with and a smooth running, efficient device is therefore secured. With motor for 110 volt A. C. current, but without sieves Note— No. 9194 Shaker may be supplied with motor for either A. C. or D. C. current of any desired voltage. Prices will be quoted on application. 0198, SHEINKAGE APPABATUS. (See page 183.) ^° 30 CENTKAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9200. 9200. SIEVES, as employed in the Laboratories of the Bureau of Soils, "Washington, D.C., for mechanical analysis. Set of four sieves with bottom pan, each about 2 inches in diameter by 1 inch high, perfectly fitted, so that the set may be well shaken without coming apart. Shaped so that there is no loss of soil, a great advantage where small samples are being tested. Sieves proper readily replaceable; upper two of brass, with perforations 1 mm. and 0.5 mm. in diameter; lower two of bolting cloth, 64 and 130 mesh ; with cover For SHAKER for No. 9200 Sieves, see No^ 9194. 9202. 9204. 9206. No. 9202. SIEVES, for preparing soils for analysis. Consists of a seamless brass frame 5 inches in diameter, having brass bottom with circular perforations. Diameter of perforations, mm % 1 2 3 5 Each 1.30 1.20 1.10 1.10 1.10 SIEVES, complete set of five as above (No. 9202) with brass cover and bottom pan. . SIEVES, set same as No. 9204 with 3 mm. and 5 mm. sieves omitted For COVERS and BOTTOM PANS see Nos. 5257 and 5257A on next page. CEMTRAL SCIENTIFIC CD No. 9209. 9208. SIEVE, without bottom, but with brass ring for holding bolting cloth. Same size as No. 9202 9209. BOLTING CLOTH, Silk, for making SoU Sieves, etc. The well-known Brand. ' ' Standard weight, 40 inches wide. Number 2 5 Mesh per linear inch 52 64 Per foot 95 i.io Number 13 15 Mesh per linear inch 130 148 Per foot 1.85 2.15 7 80 1.20 18 168 2.90 9 96 1.30 20 173 4.25 'Anchor 11 116 1.55 25 200 5.25 9210. BOLTING CLOTH, Metal, Phosphor Bronze Wire, 40 inches wide. This Boltine Cloth will outwear the Silk Bolting Cloth several times, and is of very accurate mesh. Number 65 80 Mesh per linear inch 52 04 Per foot 2.45 2.90 Number 170 2OO Mesh per linear inch 130 148 Per foot 6.00 7.50 100 80 3.35 230 168 10.00 120 96 3.75 250 173 12.00 150 116 5.00 300 200 15.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 3] Nos. 5249A-5251A. 5249A. SIEVES, Brass Frame, seamless, brass gauze, 5 inches in diameter. (For Covers and Bottom Pans see below.). ■Mesh 10 20 40 60 80 100 200 Each $1.00 1.00 1.05 1.10 1.20 1.40 3.35 5251A. SIEVES, same as No. 5249A; 8 inches in diameter. (For Covers and Bottom Pans see below.) Mesh 10 20 40 60 80 100 200 Each 1.70 1.70 1.80 1.80 2.00 2.40 5.00 5253. SIEVES, same as No. 5249A, in sets of five, one sieve fitting on top of another with one cover and bottom; set consists of 20, 40, 60, 80 and 100 mesh. Per set $ 6.55 5255. SIEVES, set same as No. 5253; 8 inches in diameter 10.70 L SCIENTIFIC CoH ^Jj 1|^ No. 5257. No. 5257A. 5257. COVERS, for Nos. 5249A, 5251A and 9202 Sieves. Diameter, inches 5 8 Each .40 .50 5257A. BOTTOM PANS, for Nos. 5249A, 5251A and 9202 Sieves. Diameter, inches ' 5 8 Each '.: .40 .50 5258. SIEVES, Wooden frame, brass gauze, diameter 6 inches. Mesh 20 40 60 80 100 200 Each 38 .40 .45 .60 .75 1.40 No. 9211. 9211. SET OF SIEVES. Consists of a heavy wooden frame provided with a slot in which may be placed bottoms of perforated steel, and hinged at one end to facilitate removal and replacement of these metal bottoms. Inside dimensions of frame, 17% x 14x5 inches. Ten bottoms are included with perforations %, %, %, %, 1, 1^, 1%, 2, 2%, and 3 inches Net 12.00 For SIEVES for Corn Testing see page 49. CENTRAL SOIKNTIFK; CO., CHICAGO, U. S. A. SOIL CONTENT TESTERS No. 9214. 9214. CONDUCTIVITY BRIDGE, for determining the soluble salt content of soils; made after designs approved by the U. S. Bureau of Soils. (See Bulletin No. 61, 1910.) The use of this bridge depends on the fact that the electric current is conducted by the salt in solution and that the conductance of the solution or, conversely, its resist- ance to the passage of the current, is determined largely by its concentration. The magnitude of current that will pass is increased by an increase of salt in solution; or the resistance to the passage of the current decreases with the increase of salt. The instrument is of general utility in measuring the resistances of solutions and of soils. It is designed primarily for use as a field instrument, and finds its great- est use in determinations of "alkali" or harmful excess of soluble salts, frequently present in the soils of arid and semiarid areas. In survey work is gives a con- venient method for determining in the field the percentage of alkali in a soil, so that the mapping may be carried on concurrently. It is also useful in determin- ing the salt content of irrigation and seepage waters. The instrument, by means of which resistances are measured, is a modified form of slide- wire Wheatstone's bridge. In operating the bridge, the cup is filled with the soil saturated with water, and placed in the clips provided for it. The resistance of the cup contents is then read, and from the resistance the amount of soluble salt present determined by reference to the tables given in the Bulletin mentioned above. Complete as described Net $ 100.00 Note. — ^Bridges of the above type made by us have proved satisfactory to and met the requirements of the U. S. Bureau of Soils, Washington, D. 0. Bridges of this type are used by the Atchison, Topeka & Santa Fe Railway Company for testing the alkali content of their tank water. 9215. DEY BATTERY, complete, as used in No. 9214 Conductivity Bridge. Each Net 1.00 CENTRAL SCIENTIFIC CO., CHICAGO, IT. 8. A. 33 No. 9217. No. 9219. 9217. TKUOG SOIL ACIDITY TESTES. This apparatus is made after specifications by E. Truog of the University of Wisconsin. The principle employed is an entirely new one and indicates clearly not only the presence of soil acidity but the degree of the acidity. Consists of a specially designed Alcohol Heater together with a 50 c.c. Graduate, Boiling Tlask, Measuring Cup, Spatula, and all necessary reagents. The test is completed in from 10 to 15 minutes, and the presence of acidity is shown by discoloration of the white test paper used, and the degree of acidity by the exact color assumed by the paper as compared with a chart of standard colors fur- nished. A full set of directions giving exact description of the test with all pre- cautions is included. Complete as described, in a neat hardwood carrying case. . .Net $ 5.00 9219. SPECIFIC HEAT APPARATUS (modified design after Prof. A. G. MeCall) for de- termining the Specific Heat of Soils; may also be used for determining the specific heat of any substance. Consists of a double-walled heater or steam jacket with large rectangular base and support rod, and a double-walled calorimeter. Both heater and calorimeter are of very substantial construction, and are well insWated. The heating chamber extends through the heater and is closed at both ends with heavy insulated coverings. The top cover has two openings, one for a thermometer, and the other for suspending the sample to be tested. The clamp which holds the heater rests on a collar which is clamped to the support rod, so that when the sample has come to a constant temperature the lower cover of the heater can be swung back ouf of the way and the heater rapidly swung around to a position over the calo- rimeter. The transfer of the specimen from heater to calorimeter can thus be read- ily and quickly effected. Heater and calorimeter complete as described, but with- out thermometers 30.00 9219A. CALOBIMETEE only of No. 9219 without thermometer 10.00 34 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9221. No. 9224. 9221. TANK, for holding water, of galvanized iron, 12 inches in diameter, with drop han- dles, for use with all soil tubes 14 inches long, or under, e. g., No. 9277, page 39.. 9222. TANK, for holding water, of galvanized iron, 12 inches in diameter. For use with soil tubes 36 inches long, or under; made especially for No. 9251 Tube, page 36.... 9224. TANK, for holding water, of galvanized iron, 26x6x6 inches. For use in all capil- larity experiments. Used with Tubes Nos. 9251-9263, pages 36 and 37 No. 9227. (Patent applied for.) 9227. TENACITY OF SOILS APPARATUS, for determining the tenacity of moist soils. In this new and improved design, which has been developed from the original in use at the University of Illinois, the inaccuracies due to friction, caused particularly by a collection of dirt on the moving parts of the instrument, have been completely obviated, and constant conditions thereby assured. Two brass soil containers are supported on a hinged frame which in turn is securely clamped to the table top. The soil containers are removable from the frame and are so constructed that they may be immediately replaced in exactly the same relative position. In use, the con- tainers are held firmly together by means of the metal stirrup shown in the illus- tration; the moist soil is compacted in the containers and smoothed level with the top, thus leaving one square inch section for testing. Weights are now placed in the hanger sufficient to pull the soil apart. Complete, as illustrated, with canvas hanger, but without weights CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 35 No. 1191. 1191. THERMOMETER, Soil, 10 inch glasS cylindrical thermometer, with paper scale in turned wood case with brass pointed bottom ' $ 1 40 No. 9233. 9233. THERMOMETER, Soil, standard grade, 10 inch glass cylindrical thermometer with metal scale, mounted on turned wood frame with brass pointed bottom 2.25 cE HTjaasciB fiTFreicoj p,f No. 9235. 9235. THERMOMETER, Soil. Thermometer set in oak with steel point. Scale engraved on stem. Range from -4° to 120° Fahrenheit, by %" divisions:- Supplied for use at four different maximum depths. Depth, cm 25 50 75 100 Depth, inches, approx 10 20 30 40 t'l'iee 5.50 6.65 7.75 9.00 9237. THERMOMETER, Soil, Recording. (See page 184.) Ng^. For CHEMICAL THERMOMETERS, see page 167. 48.00 \ No. 9240. 9240. TRAY, Color, for testing effects of color of soils on temperature. Waterproofed wooden tray, 6 ft. x 3 ft. x 6 inches deep, with drainage 15.00 9242. TRAYS, Drainage, for showing effects of drainage on temperatuie of soils. Two water-proofed wooden trays, each 3 ft. x 4 ft. x 6 inches deep, one made water tight, the other provided with drainage. Per set 20.00 9244. TRAY, Fuddling, for mixing and working soils. Water tight, waterproofed wooden tray, 25 inches x 25 inches x 2^4 inches. Will not warp 3.0Q 36 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. TUBES AND ACCESSORIES IsBBBB^p No. 9251. No. 9252. 9251. CAPILLARITY TUBE, McCall, with side tubes for studying the distribution of mois- ture in vertical columns of soil; also for determining the lateral movement of capil- lary moisture. Of brass, 36 inches long by 2 inches in diameter, with perforated bottom and small lateral tubes at definite intervals $ 2.25 9252. SAMPLING TUBE, for use in obtaining samples from the side openings of No. 9251 Capillarity Tube as suggested by Prof. John A. Slipher of Purdue University. A brass tube with diameter slightly contracted at the sharpened end is provided with a plunger by which the sample of soil may be ejected .50 Nos. 9253-4. 9253. CAPILLARITY TUBE, McCall, for determining the rate of the capillary rise of water in soils. Of brass, 36 inches long by 2 inches in diameter, with perforated bottom. Running lengthwise of the tube is a slot fitted with a window of thin celluloid through which the moisture height may be noted. The construction of this tube is such that an additional length, which the illustration shows in place, may readily be attached. Without additional length 3.35 9254. EXTENSION TUBE with coupling for studying rise of moisture to greater height than is possible with No. 9179 alone. Of brass, 36 inches long, with coupling 3.85 9254A. CELLULOID STRIP, 36 x 3 inches, for either No. 9253 or No. 9254 .30 No. 9257. 9257. CAPILLARITY TUBES, of celluloid protected by wire gauze. These tubes consist of a cylinder of galvanized iron wire gauze 2 inches in diameter, surrounding a cyl- inder of thin transparent celluloid formed of a strip of celluloid suflaciently wide to go 1% times around the tube. These tubes are soil tight, transparent, and durable, and are very satisfactory for studying the distribution of water in capillary rise experiments, since the inner tube may be withdrawn and unrolled, exposing the soil for easy sampling. Length, inches 12 24 36 48 ^ach 55 .75 1 10 1.65 9257A. CELLULOID STRIPS for No. 9257 Tubes. Length, inches 12 24 36 43 ^ach .20 .45 .60 .85 For CLEANING BRUSH, see No. 9282, page 39. For SUPPORT, see No. 9262, page 37. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 37 No. 9262. No. 9263. 9259. CAPILLARITY TUBES, Sectional, for determining capillary rise of water in soils. These sections are made of heavy brass tubing and are 8 inches long by 1% inches in diameter. Each section is threaded at both ends to receive brass couplings so that the tubes may be built up to any desired length. The tubes may readily be cleaned, and the breaking of the soil column which causes so much annoyance in long brass and glass tubes is obviated, because the section joints, which are tight enough to prevent evaporation losses from the soil, are loose enough to permit equalization of air pressure inside and outside of tube. (For Bottom Tube, see No. 9260 below.) Per section (with one coupling) $ 0.60 9260. BOTTOM TUBE. Same size as No. 9259, but with a perforated bottom. I'or use as lowest tube of set '. .75 9262. CAFILLABITY TUBE SUPPOET" for supporting 2-inch tubes 32 inches long or longer in a vertical position. Will hold six tub'es which may be readily removed or put in place. The base is constructed in form xif a tray and holds a water-tight zinc tank. A 'rod and rijig at the side of the traly ' is designed to hold an inverted flask so that the height of the water in the tray may be kej)t constant. Complete as illustrated, but without flask or tubes ,_....., 6.00 9263. CAPILLARITY TUBES, Glass. Diameter, inches Length, inches Price, each .11 2 2 1 15 24 60 45 .75 .55 9263A. PERFORATED BOTTOM, for 2-inch Glass Soil Tubes. May be used with tubes from lit inches to 2^ inches in diameter. Clamps firmly to the bottom of the tube, but may readily be removed for changing from one tube to another .15 For CLEANING BRUSH, see No. 9282, page 39. 38 CENTRAL SCIENTIFIC CO., CHICACO, V. S. A. n No. 6211. No. 9264. No. 9265. 6211. 9264. 9265. 2102. 9266. 6267. CAPILLARITY TUBE, Glass, student's lamp chimney form. Per dozen SXTPPORT, of wood, for holding four No. 6211 Capillarity Tubes SUTPORT, for four No. 6211 Capillarity Tubes, more substantial than No. 9264. Base of wood with metal uprights and adjustable shelf for supporting tubes; finely finished TUMBLERS, for use with No. 6211 Tubes; Vo-pint size. Per dozen For ORGANIC MATTER TUBES, see No. 9263 Glass Tubes. $ 0.70 1.00 1.65 .45 No. 9266. No. 9267. .90 1.25 No. 9269. 9269. SUPPORT BLOCK, for use with No. 9267 Percolation Tube ThU w v • when several soils are to be compared. .. . " ^^""^ '^ necessary For CLEANING BRUSH, see No. 9282, page 39. 1.50 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 39 No. 9274. No. 9273. No. 9275. B273. SPECIFIC GRAVITY TUBE, for determining the apparent specific gravity of surface soils under field conditions. Of steel, 12 inches long by 3 inches outside diameter," with cutting edge 9273A. SPECIFIC GRAVITY TUBE, same as No. 9273, but 4 inches inside diameter 9274. DRIVING HEAD of cast iron. For use with No. 9273 Specific Gravity Tube to pre- vent battering the upper edge when the tube is driven into fhe ground 9274A. DRIVING HEAD. Same as No. 9274, but for use with No. 9273 A Tube 9275. MAUL, for driving No. 9273 Specific Gravity Tube. Substantially made with a hick- ory head, reinforced by steel rings to prevent splitting. The handle is two feet long, and the Maul is sufficiently heavy for its purpose, without being clumsy. . . .Net 9277. 9378. 9280. 2.00 4.00 .40 1.10 2.00 No. 9277. No. 9280. VOLUME WEIGHT TUBE, for determining volume weight and pore space. Of brass, 12 inches long by 2 inches in diameter, with solid bottom, and crease one inch from the top VOLUME WEIGHT TUBE, for elementary work, of brass, l%x3% inches WATER HOLDING CAPACITY TUBE. Brass, 12 inches long by 2 inches in diam- eter, with perforated bottom, l^^ mm. perforations, and crease one inch from top.. .6C .2£ .6C No. 9282. 9282. TUBE BRUSH, for cleaning soil tubes of 2-inch diameter; has a wooden handle 3 feet long and is provided with a tuft of bristles at the end for reaching the bottom cor- ners of the tube. ,..#.... f ' ,...,...,, 40 CKNTRAL SCIENTI?'I(1 CO., CHICAGO, U. S. A. Nos. 9288-9290. No. 9291. 9288. SOIL TUBES. These tubes are so constructed that one style of tube may be used for all experiments. They are made from brass tubing 10 inches long. A cast brass base, -which is corrugated on its upper surface, is soldered into the bottom of the tube. On the lower surface of this casting is a connection for rubber tubing. A brass disc with circular perforations, and somewhat smaller than the inside of the soil tube, is dropped to the bottom of the tube and rests on the corrugated surface of the brass base, allowing free passage of air or water through the tube. By means of the connections shown, six soil tubes can be connected in series by means of rubber tubing so that a constant water level may be obtained in all the tubes. Each • $ 1.10 9289. TUBE KACK. The tube rack consists of a cast iron base, smoothly finished and japanned, to which is attached an upright standard. On this standard are carried two castings, the lower one being arranged to take and hold the lower ends of the soil tubes by means of lugs on its upper surface, and the upper consisting of a series of rings to support the upper ends of the soil tubes in a concentric position. This arrangement holds the tubes securely, but still allows them to be removed or replaced very easily. At the same time it is compact, the rack and tubes occupy- ing less than one square foot of desk room 1.65 9290. SUPPLY TANK used in determining the comparative rate of flow of water through various soils. This tank is made of polished brass and rests on the top of the standard of the tube rack by means of a socket in its base. Two short brass tubes extend downward from the base of the tank in such a position as to fall within the two soil tubes on opposite sides of the rack. The six soil tubes having been con- nected in series, the water flows from the tank to the soil tubes, maintaining a con- stant water level therein 2.2E 9291. SOIL TUBE AUGEK for removing wet soil from tubes. This auger is 1% inches in diameter, of twist pattern and made from polished cast steel. Will clean tubes to the bottom 2.0C No. 9295. 9295. WATER RETENTION CUP, for determining the maximum water retained by soil. (See Hilgard's "Soils," page 209.) Of brass 2 inches in diameter by % inch high, with dia- phragm of perforated metal fastened about ^ inch below top. This cup is used in studying the wilting point by means of the direct relationship which exists between the maxi- mum water retained by any soil and the wilting point. . . . .2( CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 41 NITROGEN DETERMINATION APPARATUS No. 5086. 5086. DIGESTING SHELF, KjeldaM's, oblong form, made of sheet iron, with rod to sup- port flasks. The shelf is supported on adjustable legs. Six burners in a row with stop coeks. Size of apparatus, 24 inches long, 5% inches wide, 9% inches high.. $ 15.00 5086A. DIGESTING SHELF, KjeldaM's, same as above, with 10 burners. Size of appara- tus, 40 inches long, 5% inches wide, 9% inches high 20.00 No. 5087. 5087. DIGESTING SHELF, KjeldaM's. Electrically heated, made of sheet iron with a sup- port for the flasks. Each heater being a unit, any one, or all, may be used at one time as desired. 24 inches long, 5% inches wide and 9 inches high, with six heat- ers. (See note.) N'et 5087A. DIGESTING SHELF, KjeldaM's, same as No. 5087, but 40 inches long and with 10 heaters. (See note.) N®* Note.— In ordering state voltage desired. Unless otherwise specified heaters for 110- volt current will be supplied. 45.00 65.00 42 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 5088. 5088. CONDENSER, Kjeldahl, copper tin lined, -with six coils of pure block tin tubing. Size of apparatus 24 inches long, 6% inches wide, 14 inches deep; height, includ- ing legs, 24 inches , $ 22.00 5088A. CONDENSER, Kjeldahl, same as No. 5088, but with 10 coils. Size of apparatus, 40 inches long, 6% inches wide, 14 inches deep; height, including legs, 24 inches 35.50 5090. KJELDAHL'S APPARATUS, consists of No. 5086 Digesting Shelf (6 burners) and No. 5088 Condenser 37.00 5090A. KJELDAHL'S APPARATUS, consists of No. 5086A Digesting Shelf (10 burners) and No. 5088A Condenser. 55.50 L-:i»-'^-^'-^ No. 5092. 5092. DISTILLING APPARATUS, Kjeldahl's, wall form. The most convenient form of this apparatus offered. All working parts of the apparatus are readily accessible from the front. The burners are provided with stop-cocks for individual regulation so that any or all of the burners may be used at once. The condenser tank is of heavy cop- per with block tin condenser tubes. With six burners but without glassware or shelf 42.00 5092 A. DISTILLING APPARATUS, Kjeldahl's, same as No. 5092, but with burners for gaso- line gas , 42.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 43 5094. DIGESTING SHELF, Johnson's, as used in Agricultural Experiment Stations. Shelf of iron, with holes 5 inches from center to center, of such shape as to support Kjeldahl flasks. The necks of the flasks may rest in holes in a large lead tube con- nected with a chimney so that all fumes are carried away. On account of the varying conditions in different laboratories, it is impossible to list this Digesting Shelf complete with the lead pipe and its support. It is recommended that tubing (No. 5094A) be purchased and fitted in position locally. In case this is not possible, see No. 5094B below. Complete with stopcock Bunsen burners, but without flasks, lead pipe, or sup- port for pipe. No. of Burners 6 10 13 Approximate length, in 30 50 65 Each $ 16.65 19.00 21.00 5094 A. LEAD TUBING for use with No. 5094, inside diameter 4 in., per foot 5094B. LEAD TUBE for No. 5094, inside diameter 4 in., complete with holes for necks of flasks, and with support. Outlet tube 12 in. long, located in middle of long tube. No. of holes 6 10 13 Each 11.00 15.50 18.00 Note. — ^If the outlet tube is desired in any other position, give exact specifications when ordering. No. 4906A. No. 5096. No. 5096A. 4906A. FLASKS, Kjeldahl's Digesting and Distilling, pear shaped, extra long neck. Jena glass. Capacity, e.c 200 500 1000 Price -23 5096. CONDENSER BULB TUBES, Kjeldahl's, as modified by Hopkins (Journal American Chemical Society, No. 3, 1896) .60 5096A. CONDENSEE BULB TUBES, Kjeldahl's, original design... . .45 No. 5097. No. 5098. No. 5099. 5097. NITEOGEN BULBS, Will-Varentrapp, 3 bulbs, pear shaped 5098. NITEOGEN BULBS, Fresenius 5099. NITEOGEN BULBS, Volhard 5100. NIXROMBTBE, ScJiiff .30 .45 .40 5.55 $ 0.8^ No. 5X00. ','KNTKAL (SCIIONTII'IC ( ( ).. (■im'.\(,(), U S. A. SOIL FERTILITY OR SEED CULTURE No. 9300. ;i:;"". model of germination, a model 40 cm. high by 60 cm. long, showing germina- tiiui of tlie lioan (I'hascolus \-ulgaris), rye (Secale cereale), and spruce (Picea excelsior). Tliis moilel shows in a very instrnctive manner the germination of the three named seeds. Tlie difference in the ilevelnpment of the monocotyledonons rye and the dicotyledo- nous bean is well lirought out, as is also the contrast Vietween their develo])ments and that of the spruce. In pasteboard box Duty Free 10.50 No. 9302. 9:;ni. 9302. GERMINATING BOX, for showing proper depth to plant seeds. (From Farmer s Bul- letin Xo. 21S.) Substantially made of galvanized iron 1.5 inches long by 8 inches hio-h with glass front and back. Since the distance between the front and back glass plates is but % of an inch, the observation of the germination of seeds planted at different depths IS made easy. To exclude light from the seeds during germination a metal shde or shield is provided for each side of the box GERMINATING BOX, Ganong Pattern, for sprouting and for observing root growths Light, rust-prooted metal box with inclined glass front. Dimensions, 7% indies long D inches deep, o% inches wide at the top, 4 inches wide at the bottom ^' 3.00 .55 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. BSBiSEBSEBBSE BBBBBBBBBBBB BBBBBBBBBBBB BBBBBBBBBESE BBBBBBBBBEBS BBBBBBBBBBBB^ BBBBBBSBBBBBi No. 9303. 9303. GERMINATING TKAY, 25 x 25 x 2% inches deep, for testing fertility of corn and other grain. This tray is substantially made of wood, water-proofed to prevent warping. A frame which fits into the tray is divided into 144 squares which may be numbered if desired $ 4.50 No. 9304. 9304. GERMINATING TRAY, 18x10x2 inches deep, well made of wood. 1.65 No. 9305. No. 8083. No. 9306. 9305. GERMINATING PLATE, of heavy glazed earthenware, 10 inches in diameter. For holding moist blotting paper in germination experiments , .15 5135. GERMINATING PLATE, of porous clay, 9 inches in diameter. Obviates the use of blotting paper in germination experiments -13 8083. GERMINATING PLATE, of porous clay, 4% inches in diameter by A inch deep, with straight sides -^^ 9306. GERMINATING PLATE, of graniteware, 11 inches in diameter by 1% inches deep. For use with moist blotting paper in germination experiments 22 9306A. SPROUTING CTTP, as described in Bulletin No. 35 of the Ehode Island Experiment Sta- tion, and on page 14 of Bailey's "Nursery Book." Of porous clay 3 inches in diam- eter by 1% inches high, with ventilated cover and glass dish .40 9295. WATER RETENTION CUP, for study of wilting point. See description and illustra- tion on page 40 •2'' For FLOWER POTS, see page 51. 46 CKNTRAL SCIENTIFIC CO., CHICAGO, T^ S. A. No. 9018, No. 9307. 9018. GRAIN CONTAINEK, of heavy galvanized iron, with handles and cover; will hold half -bushel. Each : \\" '-.' V "'•"■' "\'u ),!,+' q.in? SPROUTING APPx\RATUS, Schoenjahn's Patent, for quickly determining the percent- age sprouting value of barley, showing its malting quality. Equally efficient in show- ing sprouting value of all grains. This apparatus is simple and exceedingly practi- cal. Complete with directions 930S. SULPHUR DETERMINATION APPARATUS. (See page 185.) $ 1.00 6.65 2.00 No. 9309. No. 9311. 9.'?09. SPRINKLER, Rubber, bulb of extra quality. 8 ounce size. Straight neck. y;^ll. SPRINKLER, Rubber, same as above but with bent neck 1.00 1.10 n No. 9316. No. 9318. 9314. TROWEL, 6 inch cold rolled steel blade, with malleable iron shank firmly riveted on. .10 9316. TROWEL, first quality, made of one solid piece of steel and will outwear all others. Blade 6 inches long .50 9318. TROWEL, Transplanting or Collecting, with narrow and deeply curved blade 6 inches long; useful with the collecting case or as a transplanter, dibber, or weed digger. . .It CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 47 G350. G351. G352. G353. G354. G355. G356. G357. G358. G359. 9329. 9330. 1 9331. MOISTURE TESTERS OFFICIAL BE.OWN-DUVEL (See Bulletin No. 99, and Circular No. 72, Bureau of Plant Industry, United States De- partment of Agriculture.) These testers were developed primarily to meet the needs of grain dealers for a rapid and exact method of determining the moisture in corn. Methods have now been worked out for making moisture tests of the more important cereal grains and some of the more important seeds, aS'well as for flour and ground grain. The method is entirely practicable for making moisture determinations of practically all substances which admit of a free circulation of oil during the heating. The apparatus consists of a heating chamber divided into compartments for testing a number of samples at the same time; a cold water tank through which condenser tubes pass; burners; thermometers; special side-neck flasks; graduated cylinders; and No. G363 Automatic Oil Measuring and Grain Separating Device. All testers are 12% in. wide and 31 in. high. These testers are the standard form as specified in Paragraph 11 of the Federal Corn Grades, effective July 1, 1914. Note. — If Jena glass flasks are desired in the place of the regular glass flasks, add $0.50 per compartment to the prices below; if single-wall copper flasks, add $3.00 per com- partment; if double-wall copper flasks, as used in flour testing, add $4.40 per com- partment. MOISTUEE TESTER, two compartment, 13 in. long, with gas burners Net MOISTUEE TESTER, same as No. G350, but with alcohol burners Net MOISTURE TESTER, same as No. G350, but electrically heated Net MOISTURE TESTER, four compartment, 26 in. long, with gas burners Net MOISTUEE TESTER, same as No. G353, but with alcohol burners Net MOISTURE TESTER, same as No. G353, but electrically heated Net MOISTURE TESTER, six compartment, 39 in. long, with gas burners Net MOISTURE TESTER, same as No. G356, but with alcohol burners Net MOISTURE TESTER, same as No. G356, but electrically heated Net ACCESSORIES FOR MOISTURE TESTERS FLASK, Glass, 1000 c. c, for moisture testers Net FLASK, Jena Glass, 1000 c. c, for moisture testers Net FLASK, Copper, single wall, 1000 c. c, for moisture testers Net FLASK, Copper, double wall, inner vessel 900 c. c, for moisture testers Net For other ACCESSORIES see page 185. $35.00 35.00 50.00 50.00 50.00 80.00 65.00 65.00 110.00 1.00 1.50 4.00 5.40 CENTEAL SCIENTIFIC CO., CHICAGO, IT. S. A. STANDARD SEED TESTERS j-'^-w^WBxmr' Nos. 9338B to E. It gives us pleasure to announce that we are now sole School Agents throughout the United States for the Standard Seed Tester. For some time we have desired to add to our line of Agricultural Apparatus a high grade seed tester for School and College use, and after carefully looking over the field we selected the Standard Seed Tester as our choice because we believe it to be the cleanest, quickest and most accurate Seed Tester on the market. This is evidenced by the fact that within the short time since this device was marketed it has come into general use by the leading Schools and Agricultural Colleges, seedsmen, florists, canners, maltsters, pure seed commissioners and farmers throughout the United States and four foreign coun- tries. These machines work on the principle that germination should always be done in the presence of the three "germination factors" without which accurate results can- not be obtained: (1) moisture, supplied from beneath the seed as in the field, (2) fresh air, (3) proper temperature. (1) The water from the supply tank on the top of the machine drips through a tube into the gutter or "sub-reservoir" of the upper tray, passes around the tray, thence into the "sub-reservoir" of the tray below, and so on. Moisture from the "sub-reservoirs" is carried up and under the seed through blotters by means of capillary attraction. (2) The test-chamber is ventilated by a constant supply of fresh air admitted through the drip openings. This retards mold growth and prevents the accumulation of carbon dioxide which would otherwise injure the growth. (3) An oil lamp suspended below the tester supplies the heat. The gases of combustion pass through the test-chamber in four vertical flues which- serve as heating pipes. These cause a circulation of air within the ma- chine which carries the carbon dioxide away from the test-trays. The Field, Garden or Flower Seed, Seed-Corn or Seed-Grain to be tested is placed upon blotters and then laid on the test-trays. If desired, sawdust, sand, soil or cloth may be used in combination with the blotters, but the principle is always the same. In most eases germination starts very soon after the seed is placed, and the root systems and top sprouts rapidly develop almost in sight of the operator. The patented In- dented Test Pads, 100 of which are supplied with each machine, are a great aid in counting, placing, handling, and reading the tests of all small seeds, as with these the seeds may be handled quickly and easily without any danger of mixing or in- jury. The Standard Seed Tester will frequently start sprouts on Corn, Alfalfa, CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. STANDARD SEED TESTERS— Continued Beans and other seeds within twenty-four hours after the seeds are placed in test, and corn is often leaved out within four days' time. By the Standard method root sprouts are grown on the surface of clean blotters in plain sight of the operator, and their progress may be noted without disturbing the tender plants. Seedsmen and florists throughout the United States and Canada strongly advocate the use of Seed Testers because they have proved that " it pays to test. " Until recently it was the common practice of the seed trade to buy and sell solely on appearance, but today more than one-half of the seedsmen and florists in the United States fol- low the practice of testing germination of every lot of seed before offering it to their trade, and as a result the seed now offered on the market is of much higher quality than that obtainable a few years ago. It is to be regretted that many Schools which are supposed to teach practical Agri- culture are so far behind the times in this branch. Growing specimens produced within a few hours' time are of greatest value when used to prove and clinch the arguments of a lecture. For class-room use in Botany work, as well as in the study of Agriculture, we know of no device so effective as the Seed Tester which we now offer to our trade. Catalog No. Number of Trays Size Trays, Inches Seed Corn Capacity, Ears Capacity, Bus. per week Base, Inches Height, Inches Price, Net 9338B 9338C 5 10 5 10 15 xl5 I2y2xi2y2 22y2x22y2 22y2x22y2 500 Small seed only 1125 2250 10 to 12 y2 23x23 22x22 32x32 32x32 44 45 52 68 $ 30.00 45.00 9338D 9388E 22 ya to 25 45 to 50 60.00 • 90.00 No. 9339. No. 9340. 9339. CORN TEST SIEVES according to specifications of the United States Department of Agriculture. The set consists of one sieve with % iueh round holes, one sieve with 9/64 inch round holes, and one bottom pan, nested, of brass, 13% inches in diam- eter by 3 inches deep. Per set Net 9339A-E. SIEVES, see page 185. 9340. GRAIN TESTER. For determining rapidly the farinaceous condition of barley and malt. Fifty kernels may be cut through in a very short time and their interior con- dition clearly shown. In use the upper and lower perforated parts are placed together, with the center knife, clearly seen in the illustration, to ono side. Grain under test is then shaken into the fifty perforations. After the knife has been pressed into position, cutting through the seeds, the knife and upper perforated sections are slipped away, leav- ing the cross section of the kernels plainly exposed on the lower section. Hand- somely nickel plated t f f . . t , , • • , ,, • >>f 4.5( 8.0< 50 CENTRAL SCIENTIFIC CO., CniCAGO, TJ. S. A. No. 9341. No. 9341A. 9341. GEAIN TESTERS, of best construction, highly polished and lacquered. When cup is empty, the beam balances with the poise set at zero. Beam has three rows of gradua- tions which indicate the number of pounds per bushel of sample, the exact weight of sample, and the percentage of loss in cleaning. Capacity 1 pt. 1 qt. 2 qt. Price $13.00 14.00 15.00 9341A. GEAIN TESTEE FILLEES. For use with No. 9341 G ain Testers. This device is of special value when accurate testing is desired, since it allows the grain to flow in a uniform stream and insures a uniform density in the cup. Complete with pol- ished steel rod for striking off. Capacity, quarts 1 2 Price, each 5.50 6.00 Note. — The above fillers may be used with any grain testers of capacity equal to or smaller than that of the filler. A. . ) No. 9343. No. 9344. 9343. 9344. GEAIN TESTER, to indicate weight per bushel of grain or seed by testing in half- bushel measure. Measure of galvanized steel, standard of iron, beam of brass, highly polished. Beam graduated to indicate number of pounds per bushiei, 'actual weight of sample and percentage of loss in cleaning $ 32.00 SEED SCALE (Dirt Scale). For ascertaining the percentage of dirt in seed. The beam has two rows of marks, the upper indicating the weight, one pound by quarter ounces; the lower the percentage of dirt. In use a sample pound is weighed, sifted, and replaced in the scoop. The poise is then run back until the beam balances. The lower row of marks; jShows the percentage of loss by dirt removed, i. e., the percentage of dirt contained in the seed. Complete with brass scoop 6.00 For GEAIN AND SEED BALANCES, see page 127, CUNTEAL SCIENTIPIO CO.. OHTCAGO, TT. S. A. 51 No. 9345. 9345. FLOWER POTS, Earthenware, standard form, without saucers. These pots are first quality and the strongest made, and because of their lightness and extreme porosity, they are the best growing pots on the market. They have what is commonly known as a "round bottom," which assists the drainage and permits the plants to dump more easily without breaking the ball of earth. Full size inside measure. Diameter, inches 2 4 6 8 Per dozen $0.11 .20 .55 1.33 9347. FLOWER POT SAUCERS, first quality, to match No. 9345 Flower Pots. Diameter, inches 3 4 6 8 Per dozen .12 .17 .33 .60 ^ i No. 9349. 9349. FLOWER POTS, Paper. The cheapest fiowor pots on the market. They are made from waterproof fabric, and for liglitness, cleanliness and cheapness have no equal. They are absolutely unbreakable, and much lighter in weight than clay. Height, inches Per 100 3 .60 4 1.10 5 1.75 2.25 No. 9350. 9350 FLOWER POTS, Wire Gauze, as described in Farmer's Bulletin No. 257, and Bureau of Soils Circular No. 18. Made of galvanized wire gauze about 3 inches high and 31/0 inches in diameter. The construction of these pots has been so planned as to enable the comparison of the action of fertilizers of different kinds and in varying.,-,, i' f> quantities by actual measurements of the transpiration of growing plants. Wire poj;,, ^ ^^ only, not paraffined CENTRAL SCIENTIFIC CO., CHICAGO, IT. S. A. No. 9352. 9352. PLANT LABEL, Cypress, for use outside; will last for years. Size IBxlM, inches. Per dozen $ 0.40 Per hundred 2.50 No. 9354. No. 93CC. No. 9358. CENTRAL SCIENTIFIC CO. No. 9359. 9354. PLANT LABEL, Iron, heavily japanned and substantial. Length of stem 7 inches; label 1% X 2% inches, protected by mica sheet, and readily removable. Each 9356. PLANT LABEL, Wood, for pots. Length, inches 4 g 8 Per hundred .11 17 £8 9358. TREE LABEL, Wood, % x 3% inches, with copper wire. Per liundred 9359. TREE LABEL, Aluminum, 1x3% inches, with copper wire. Per dozen .20 .20 .33 No. 9360 (fuU size). 9360. TAG, Paper, of extra thick tough stock with a fine writing surface. Each tag has metal eyelet and a loop of the best twine. Per hundred .46 CENTRAL SCTKNTIFIC CO., CHKWGO, IT. S, A. 53 FARM CROPS LABORATORY MATERIAL No. 9361. 9361. 9362. 9363. 9364. With a view to overcoming the (Ufficulty iu securing and keeping jiroperly named specimens of the common farm crops, yet retaining much of the instructional value of the use of the entire specimens, the College of Agriculture of the University of Minnesota has prepared exhibits of a number of crops which are listed below. In addition to the sets Nos. 9361 to 9368 we are prepared to supply bulk laboratory material as furnished by the same source. This includes Ear Corn, Wheat, Barley, etc., both in the head, and as threshed grain, and a number of Grasses, Legumes, and Miscellaneous Plants. SEED SETS The sets listed below are put up in a neat and substantial case. Heavy cardboard properly punched to receive the material is enclosed between two 8x10 inch glass plates which are bound together firmly by a specially made galvanized iron frame so that the sets are as durable as is possible to make them. Each set is provided with a screw-eye to permit hanging. On the back of each case underneath the glass is a printed sheet showing the classification and other concise information regarding the crop or crops. With the material included in the case and the infor- mation on the back no other text or reference is necessary for the student to get accurate knowledge of the classification and characteristics of the crops being stud- ied. TYPES OF WHEAT Ppikes and threshed grain of Einkorn, Black Winter Emnicr, Bearded Spelt, Polish, Poulard, Bcardc.l Cluli, Macaroni, Common Spring, Comnion Winter TYPES OF BARLEY. Spikes and threshed grain of Six-row Common, True Six-row, AVhite Hull-less, Black Hull-less, Six-row Beardless, Two-row Chevalier, Two-row Im- perial, Two-row Hull-less, Two-row Beardless -f^let TYPES OF MILLET. Spikes and threshed grain of German, Hungarian, Red Sibe- rian, Kursk, White Ural, Black Voronezh, Early Fortune, Barnyard Net MISCELLANEOUS PLANTS. Inflorescence with threshed grain of Winter Rye, Spring Rye, Oats, Blue Dutch Flax, Golden Flax, Japanese Buckwheat, Sorghum, Rice, Cotton, Sudan Grass $ 1.00 1.00 1.00 1.00 54 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. n O ^ # O o O ^^ i n n o r- f^ "^ t No. 9365. 9365. SEEDS OF COMMON FARM OEOPS. Grains only. Wheat, six varieties; Emraer, two varieties; Oats, seven varieties; Eye, two varieties; Barley, five varieties; Buck- wheat, two varieties; Corn, eleven varieties; Millet, nine varieties; Grasses, five varieties; Sorghum; Sugar Beets; Mangels; Bape; Clover, four varieties; Alfalfa; Field Peas; Field Beans; Soy Beans; Winter Vetch ^ Net 9366. GKASSES. Spikes and panicles with threshed seeds; Timothy, Brome Grass, Bed Top, Orchard Grass, Kentucky Blue Grass, Canadian Blue Grass, Meadow Fescue, Perennial Bye Grass, Slender Wheat Grass Net 9367. LEGUMES. Heads and pods with seeds; Medium Bed Clover, Alsike Clover, White Clover, Alfalfa, Sweet Clover, Canada Field Peas, Soy Beans, Winter Vetch, Crim- son Glover Net 9368. ECONOMIC WHEATS. Spikes and grain: Blue Stem, Fife, Velvet Chaff, Humpback, Durum, Bearded Winter, Smooth Winter, Club, Emmer Net TYPES AND VARIETIES OF CORN In the following sets one ear each of the varieties mentioned is furnished. Note: It is frequently impossible to supply ear corn of a particular variety. In such cases the right to substitute ' is reserved. 93 70 A. POD CORN AND SOFT CORN (Zea Mays Tunicata and Amylacea). Pod Corn; White Soft; Blue Soft; Mixed Soft. Per set of four ears Net 9370B. POP CORN (Zea Mays Everta). Endosperm Corneous throughout. Includes White Bice; White Bice Sure Pop; Yellow Bice, Baby Golden; Chocolate Bice; Striped Bice; White Pearl, Mapledale Prolific; White Pearl, Eight Bow; Yellow Pearl, Queen 's Golden; B^ack Pearl, Black Beauty; White Bice, Ball; Bed Bice. Per set of eleven ears Net 9370C. FLINT CORN (Zea Mays Indurata). Small amount of white starchy endosperm en- closed by corneous endosperm. Includes Triumph; Longfellow; Smutnose; Dakota White; Squaw Flint; King Philip. Per set of six ears. Net 9370D. DENT CORN (Zea Mays Indentata). White starchy endosperm at center and ex- tending to summit of kernel. Corneous endosperm at sides. Includes Minnesota No. 13; Murdock; Pride of North; Silver King; Bustler White; Minnesota No. 23; Minnesota King; Northwestern Dent; Calico; Gingham; Illinois Bed or Bloody Butcher. Per set of eleven ears Net 9370E. SWEET CORN (Zea Mays Saccharata). Endosperm more or less wrinkled and trans- lucent in appearance. Includes Golden Bantam; Early Crosby; Stowell's Ever- green; Country Gentleman; Black Mexican; Indian Sweet; Early Minnesota. Per set of seven ears Net $ 1.00 1.00 1.00 1.00 .75 2.0C .7£ 2.0( 1.0( CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 55 T I I'MC. I ■ u ~U'\ jtfe-i . >i. i ,u(\ i i^" i w..i ' i ; . ;»-- -r No. 9371A. EAR CORN— MOUNTED SAMPLES Each set of Ear Corn listed below includes one representative ear of each of the varie- ties mentioned, mounted in a very neat, substantial, glass-covered, oak case. Kernels as well as ears are shown. Note; It is frequently impossilDle to supply good ears of certain varieties of corn, such eases the right to substitute, is reserved. In 9371A. MINNESOTA DENT CORNS. Includes Silver King; Murdoek; Bustler White; Min- nesota No. 13; Calico; Golden Glow; Pride of North; Northwestern Dent; Minne- sota No. 23; Minnesota King. Per set of ten ears Net $ 4.00 9371B. NORTHERN MINNESOTA CORNS. Includes Minnesota No. 23; Minnesota King; Pride of North; Northwestern Dent; Longfellow Flint; Smutnose Flint; Triumph Flint; King Philip Flint; Squaw Flint; Dakota Flint. Per set of ten ears Net 4.00 9371C. SWEET CORNS. Includes Stowell's Evergreen; Country Gentleman; Early Crosby; Golden Bantam; Black Mexican; Early Minnesota; Peep o'Day; White Cory; Ken- dall's Early Giant; Perry's Hybrid. Per set of ten ears .Net 4.00 9373 D. POP CORNS. Includes White Pearl; Tellow P^arl; White Pearl, Eight Row; Blue Pearl; White Eice, Sure Pop; Yellow Rice; Red Rice; Striped Rice; Chocolate Rice; Ball. Per set of ten ears Net 4.0C 9372. STUDIES IN CORN. This set consists of typical kernels and parts of ears mounted in a neat metal-bound glass-eovered 8 x 10 inch case illustrating points regarding corns that are emphasized in the Minnesota Score Card. Good as well as poor specimens are included. Depth of kernel, space at cob, chaffiness, starchiness, plump tips, adherence of tip cap to cob, adherence of chaff to kernels, color of embryo, size germs, moldiness, blistering, purity, uniformity, shape of kernels, character of dent, etc.. are shown and preserved for use indefinitely. Very valu- able in connection with the study of corn Net 3.5C 66 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. Nos. 9373L, 9379C, 9375H. TYPES AND VARIETIES OF WHEAT HEADS 9373A. EINKOEil (Tritieum monoeoeeum). Per box of 25 heads Net $ 0.20 9373B. SPELT (Tritieum spelta), beardless variety. Per box of 25 heads Net .20 9373C. SPELT (Tritieum spelta), bearded variety. Per box of 25 heads Net .20 9373D. xiMMEK (Tritieum diooccum), bearded white spring variety. Per box of 25 heads. Net .20 9373E. EMMEB (Tritieum dicoceum), bearded black winter variety. Per box of 25 heads . Net .20 9373F. COMMON WHEAT (Tritieum sativum vulgare), Blue Stem, beardless spring, with pubescent white glumes. Per box of 25 heads Net .20 9373G. COMMON WHEAT (Tritieum sativum vulgare), Fife, beardless spring, with smooth white glumes. Per box of 25 heads Net .20 S373H. COMMON WHEAT (Tritieum sativum vulgare), beardless spring, with smooth red (jiumes. Per box of 25 heads Net .20 9378J. COMMON WHEAT (Tritieum sativum vulgare). Velvet Chaff, bearded spring, with smooth white glumes. Per box of 25 heads Net .20 9373K. COMMON WHEAT (Tritieum sativum vulgare). Humpback, bearded spring, with smooth white glumes. Per box of 25 heads Net .20 9373L. COMMON WHEAT (Tritieum sativum vulgare), Turkey Eed, bearded winter, with smooth white glumes. Per box of 25 heads Net .20 9373M. COMMON WHEAT (Tritieum sativum vulgare), beardless winter, with smooth red glumes. Per box of 25 heads Net .20 9373N: COMMON WHEAT (Tritieum sativum vulgare), Fultz, beardless winter, with smooth white glumes. Per box of 25 heads Net .20 nnrSP. common wheat (Tritieum Sativum vulgare), Kharkov, bearded winter, with smooth white glumes. Per box of 25 heads Net .20 9373Q. CLUB WHEAT (Tritieum sativum compaetum), Little Club, beardless, with smooth white glumes. Per box of 25 heads ' Net .20 9373E. CLUB WHEAT (Tritieum sativum compaetum), Washington Club, bearded. Per box of 25 heads Net .20 9373S. POXILAED WHEAT (Tritieum sativum turgidum), Alaska, bearded spring, with branched spikes and smooth white glumes. Per box of 25 heads Net .20 9373T. DUKUM WHEAT (Tritieum sativum durum), Kubanka, bearded spring, with smooth glumes. Per box of 25 heads Net .20 9373U. POLISH WHEAT (Tritieum polonieum) Polish, bearded spring, with smooth white glumes. Per box of 25 heads Net .20 THRESHED GRAIN In Screw-capped Bottles. 9374B. SPELT (Tritieum spelta), beardless variety. Per 4-ounee bottle Net 9374C. SPELT (Tritieum spelta), bearded variety. Per 4 ounce bottle Net 9374D. EMMEE (Tritieum dieoccum), bearded white spring variety. Per 4-ounee bottle. Net 9374E. EMMEE (Tritieum dicoceum), bearded black winter variety. Per 4-ounee bottle. Net 9374F. COMMON WHEAT (Tritieum sativum vulgare). Blue Stem, beardless spring, with pubescent white glumes. Per 4-ounee bottle Net 9374G. COMMON WHEAT (Tritieum sativum vulgare), Fife, beardless spring, with smooth white glumes. Per 4-ounee bottle ' Net .20 .20 .20 .20 .20 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 5; No. 9374F. No. 9376A. No. 9378A. No. 9388A. WHEAT — THRESHED GRAIN— Continued. 9374H. COMMON WHEAT (Triticum sativum vulgare), beardless spring, with smooth red glumes. Per 4-ouiice bottle Net 9374J. COMMON WHEAT (Triticum sativum vulgare), Velvet Chaff, bearded spring,' with smooth white glumes. Per 4-ounce bottle Net 9374K. COMMON WHEAT (Triticum sativum vulgare), Humpback, bearded spring, with smooth white glumes. Per 4-ounee bottle Net 9374L. COMMON WHEAT (Triticum sativum vulgare), Turkey Red, bearded winter, with smooth white glumes. Per 4-ounce bottle Net 9374M. COMMON WHEAT (Triticum sativum vulgare), beardless winter, with smooth red glumes. Per 4-ounce bottle Net 9374N. COMMON WHEAT (Triticum sativum vulgare), Pultz, beardless winter, with smooth white glumes. Per 4-ounce bottle Net 9374P. COMMON WHEAT (Triticum sativum vulgare), Kharkov, bearded winter, with smooth white glumes. Per 4-ounce bottle Net 9374Q. CIiTJB WHEAT (Triticum sativum compactum). Little Club, beardless, with smooth white glumes. Per 4-ounce bottle Net 9374R. CLUB WHEAT (Triticum sativum compactum), Washington Clxib, bearded. Per 4-ounce bottle . Net 9374S. POTJIiARD WHEAT (Triticum sativum turgidum), Alaska, bearded spring, with branched spikes and smooth white glumes. Per 4-ounce bottle. Net 9374T. DURUM WHEAT (Triticum sativum durum), Kubanka, bearded spring, with smooth glumes. Per 4-ounce bottle Net 9374U. POLISH WHEAT (Triticum polonicum), Polish, bearded spring with smooth white glumes. Per 4-ounce bottle Net $ 0.20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 TYPES AND VARIETIES OF BARLEY HEADS 9375A. TRUE SIX-ROW BARLEY (Hordeum sativum, hexastiehum pyramidatimi), (1) Utah Winter or (2) Eeid's Triumph, bearded white. Per box of 25 heads Net .25 9375B. COMMON SIX-ROW BARLEY (Hordeum sativum vulgare pallidum), Oderbrueker, bearded white. Per box of 25 heads Net .25 9375C. COMMON SIX-ROW BARLEY (Hordeum sativum vulgare pallidum), Mandseheuri. Per box of 25 heads Net .25 9375D. SIX-ROW BARLEY (Hordeum sativum vulgare). Black Canadian, bearded black. Per box of 25 heads Net .25 9375E. SIX-ROW BARLEY (Hordeum sativum vulgare trifurcatum), beardless white hull- less. Per box of 25 heads .Net .2E 937.'5F. SIX-ROW BARLEY (Hordeum sativum vulgare violaceum), bearded black hull-less. Per box of 25 heads ■ Net .25 9375G. SIX-ROW BARLEY (Hordeum sativum vulgare Horsfordianum), Success Beardless, beardless white. Per box of 25 heads • Net .25 9375H. TWO-ROW BARLEY (Hordeum sativum distichum vulgare nutans), Chevalier, long- bearded white. Per box of 25 heads Net .25 9375J. TWO-ROW BARLEY (Hordeum sativum distichum ereetum), Svanhals, broad- bearded white. Per box of 25 heads Net .25 9375K. TWO-ROW BARLEY (Hordeum sativum distichum nudum), bearded white hull- less. Per box of 25 heads Net . .25 9375L. TWO-BOW BARLEY (Hordeum sativum distichum), bearded black. Per box of 25 heads Net .25 9375M. TWO-ROW BARLEY (Hordeum sativum distichum angustispicatum), beardless white. Per box of 25 heads Net .25 58 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. TYPES AND VARIETIES OF BARLEY THRESHED GRAIN In Screw-capped Bottles 9376A. TKUE SIX-ROW BARLEY (Hordeum sativum hexastiohum pyramidatum), (l)irtali Winter or (2) Eeid's Triumph, bearded white. Per 4-ouncc bottle Net * 0.25 O.-iZeB. COMMON SIX-ROW BARLEY (Hordeum sativum vulgare pallidum), Oderbrueker, bearded white. Per 4-ounce bottle Net .25 9376C. COMMON SIX-ROW BARLEY (Hordeum sativum vulgare pallidum), Mandscheuri. Per 4-ounce bottle Net .25 9376D. SIX-ROW BARLEY (Hordeum sativum vulgare), Blaek Canadian, bearded black. Per 4-ounce bottle Net .25 9376E. SIX-ROW BARLEY (Hordeum sativum vu'gare trifurcatum), beardless white hull- less. Per 4-ounee bottle Net .25 9376r. SIX-ROW BARLEY (Hordeum sativum vulgare violaceum), bearded black hull-less. Per 4-ounce bottle Not .25 9376G. SIX-ROW BARLEY (Hordeum sativum vulgare Horsfordianum), Success Beardless, beardless white. Per 4-ounce bottle Net .25 9376H. TWO-ROW BARLEY (Hordeum sativum distichum vulgare nutans). Chevalier, long- bearded white. Per 4-ounee bottle Net .25 9376J. TWO-ROW BARLEY (Hordeum sativum distichum ereotum), Svanhals, broad- bearded white. Per 4-ounce bottle Not .25 9376K. TWO-ROW BARLEY (Hordeum sativum distichum nudum), bearded white hull-less. Per 4-ounee bottle Net .25 9376L. TWO-ROW BARLEY (Hordeum sativum distichum), bearded black. Per 4-ounce bot- tle Net .25 TYPES AND VARIETIES OF OATS PANICLES 9377A. WHITE OATS (Avena sativa), spreading panicle, medium maturing. Improved Li- gowa, Minnesota No. 281. Per box of 25 panicles . Net .30 9377B. WHITE OATS (Avena sativa), spreading panicle, medium maturing. Swedish Select. Per box of 25 panicles Net .30 9377C. YELLOW OATS (Avena sativa), spreading panicle, early maturing. Sixty-day Min- nesota No. 261. Per box of 25 panicles Net .30 9377D. YELLOW OATS (Avena sativa), spreading panicle, early maturing. Kherson. Per box of 25 panicles Net .30 9377E. BLACK OATS (Avena sativa), spreading panicle, medium maturing. Per box of 25 panicles Net .30 9377F. WHITE OATS (Avena sativa), side panicle, medium maturing. Per box of 25 panicles Net .30 93i7G. WHITE OATS (Avena sativa), side panicle, late maturing. White Eussian. Per box of 2o panicles Net .30 9377H. BLACK OATS (Avena sativa), side panicle, medium maturing. Per box of 25 panicles Net .30 9377J. WILD OATS (Avena fatua). Per box of 25 panicles Net .30 THRESHED GRAIN In Screw-capped Bottles. 9378A. WHITE OATS (Avena sativa), spreading panicle, medium maturing. Improved Li- gowa, Minnesota No. 281. Per 4-ounee bottle Net .20 9378B. WHITE OATS (Avena sativa), spreading panicle, medium maturing. Swedish Se- lect. Per 4-ounce bottle Net .20 9378C. YELLOW OATS (Avena sativa), spreading panicle, early maturing. Sixty-day Min- nesota No. 261. Per 4-ounce bottle Net .20 9378D. YELLOW OATS (Avena sativa), spreading panicle, early maturing. Kherson. Per 4-ounce bottle Net .20 9378 E. BLACK OATS (Avena sativa), spreading panicle, medium maturing. Per 4-ounce Ijottle Net .20 9378F. WHITE OATS (Avena sativa) side panicle, medium maturing. Per 4-ounce bottle. Net .20 9378G. WHITE OATS (Avena sativa), side panicle, late maturing. White Russian. Per 4-ounce bottle ]i^g^ 20 9378H. BLACK OATS (Avena sativa), side panicle, medium maturing. Per 4-ounce bottle. Net 20 CBNTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 59 TYPES AND VARIETIES OF MILLET HEADS 9379A. FEABIi MILLET (Pennisetum glauciim). Per box of 4 heads Net $ 0.30 9379B. COMMON MILLET (Setaria italioa). Per box of 25 heads Net .30 9379C. HUNGARIAN MILLET (Setaria italica). Per box of 25 heads Net .30 9379D. GERMAN MILLET (Setaria italioa). Per box of 25 heads Net .30 9379B. RED SIBERIAN MILLET (Setaria italiea). Per box of 25 heads Net .30 9379F. KURSK MILLET (Setaria italica). Per box of 25 heads Net .30 9379G. EARLY FORTUNE MILLET (Panieum miliaeeum). Per box of 25 heads Net .30 9379H. RED TURGHAI MILLET (Panieum miliaeeum). Per box of 25 heads Net .30 9379J. RED RUSSIAN MILLET (Panieum miliaeeum). Per box of 25 heads Net .30 9379K, WHITE URAL MILLET (Panieum miliaeeum). Per box of 25 heads Net .30 9379L. BLACK VORONEZH MILLET (Panieum miliaeeum). Per box of 25 heads Net .30 9379M. JAPANESE BARNYARD MILLET (Echinochloa frumentaeea). Per box of 25 lieads Net .30 P380A. 19380B. 9380C. 9380D. 9380E. 9380P. 9380G. 9380H. 9380J. 9380K. BL. THRESHED MATERIAL In Screw-capped Bottles. PEA^FMIIiLET (Pennisetum glaucum). Per 2-ouiiee bottle Net .20 COMMON. MILLET (Setaria italiea). Per 2-ounce bottle Net .20 HUNGARIAN MILLET (Setaria italiea). Per 2-ounee bottle Net .20 GERMAN MILLET (Setaria italiea). Per 2-ounce bottle Net .20 RED SIBERIAN MILLET (Setaria italiea) . Per 2-ounce bottle Net .20 KURSK MILLET (Setaria italica). Per 2-ounce bottle Net .20 EARLY FORTUNE MILLET (Panieum miliaeeum). Per 2-ounce bottle "....Net .20 RED TURGHAI MILLET (Panieum miliaeeum). Per 2-ounce bottle Net .20 RED RUSSIAN MILLET (Panieum miliaeeum). Per 2-ounee bottle Net .20 WHITE URAL MILLET (Panieum miliaeeum). Per 2-ounee bottle Net .20 BLACK VORONEZH MILLET (Panieum miliaeeum). Per 2-ounce bottle Net .20 JAPANESE BARNYARD MILLET (Echinochloa frumentaeea). Per 2-oz. bottle. Net .20 9381A. 9381B. 9381C. 9381D. 9381E. 9381P. 9381G. 9381H. 9381J. TYPES OF GRASSES UNTHRESHED MATERIAL TIMOTHY (Phleum pratense). Per box of 25 heads. Net .30 BROME GRASS (Bromus inermis). Per box of 25 heads Net .30 RED TOP (Agrostis alba var. vulgaris). Per box of 25 heads Net .30 ORCHARD GRASS (Daetylis glomerata). Per box of 25 heads Net .30 KENTUCKY BLUE GRASS (Poa pratensis). Per box of 25 heads Net .30 CANADA BLUE GRASS (Poa compressa). Per box of 25 heads Net .30 MEADOW FESCUE (Festuea elatior var. pratensis). Per box of 25 heads Net .30 PERENNIAL BYE GRASS (Lolium perenne). Per box of 25 heads Net .30 SLENDER WHEAT GRASS (Agropyron tenerum). Per box of 25 heads. .;.. .Net .30 9382A. 9382B. 9382C. 9382D. 9382E. 9382F. 9382G. 9382H. 9382J. THRESHED MATERIAL In Screw-capped Bottles. TIMOTHY (Phleum pratense) . Per 2-ounee bottle Net BROME GRASS (Bromus inermis). Per 2-ounee bottle Net RED TOP (Agrostis alba var. vulgaris). Per 2-ounce bottle Net ORCHARD GRASS (Daetylis glomerata). Per 2-ounce bottle Net KENTUCKY BLUE GRASS (Poa pratensis). ' Per 2-ounce bottle, Net CANADA BLUE GRASS (Poa compressaj. Per 2-ounce bottle Net MEADOW FESCUE (Festuea elatior var. pratensis). Per 2-ounce bottle Net PERENNIAL RYE GRASS (Lolium perenne). Per 2-ounce bottle Net SLENDER WHEAT GRASS (Agropyron tenerum). Per 2-ounce bottle Net .15 .15 .15 .15 .15 ,15 .15 .15 .15 9383A. 9383B. 9383C. 9383D. 9383E. LEGUMES HEADS MEDIUM RED CLOVER (Trifolium pratense). Per box of 25 heads Net ALSIKE CLOVER (Trifolium hybridum). Per box of 25 heads Net WHITE CLOVER (Trifolium repens). Per box of 25 heads ^^t COMMON ALFALFA (Medicago sativa). Per box of 25 heads. ^et WHITE SWEET CLOVER CMelilotus alba). Per box of 25 heads i^et .30 .30 .30 .30 .30 60 9384A. 9384B. 9384C. 9384D. 9384E. 9384F. 9384G. 9384H. 9384J. 9384K. 9384L. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. LEGUMES— THRESHED SEED In Sciew-capped Bottles MEDIXTM RED CLOVER (Trifolium pratense). Per 2-ounce bottle Net ALSIKE CLOVER (Trifolium hybridum). Per 2-ounce bottle Net WHITE CLOVER (Trifolium repens). Per 2-ouiice bottle Net COMMON ALFALFA (Medicago sativa). Per 2-ounce bottle Net WHITE SWEET CLOVER (Melilotus alba), seed in hull. Per 2-ounce bottle. .Net CRIMSON CLOVER (Trifolium incarnatum). Per 2-ounee bottle Net WHITE CANADA FIELD PEAS (Pisium sativum var. arvense), medium. Per 2- ounce bottle Net GOLDEN VINE FIELD PEAS (Pisium sativum var. arvense), early. Per 2-ounce bottle Net SOY BEANS (Glysine hispeda). Per 2-ounce bottle Net WINTER VETCH (Vicia villosa). Per 2-ounce bottle Net COW PEAS CVigna sinensis). Per 2-ounce bottle Net $ 0.15 .15 .15 .15 .15 .15 .15 .15 .15 .15 .15 9385A. 9385B. 9385C. 9385D. 9385E. 9385P. 9385G. 9385H. 9385J. 9385K. 9385L. 9385M. 9385N. 9385P. 9385Q. 9385E. 9386A. 9386B. 9386C. 9386D. 9386B. 9386F. 9386G. 9386H. 9386J. 9386K. 9386L. 9386M. 9386N. 9386P. 9386Q. 9386E. TYPES AND VARIETIES OF SORGHUM (ANDROPOGON SORGHUM) HEADS SUDAN GRASS. Per box of 10-15 heads Net AMBER SORGHUM. Per box of 1 head Net WHITE AMBER SORGHUM. Per box of 1 head Net SUMAC SORGHUM. Per box of 1 head Net ORANGE SORGHUM. Per box of 1 head Net RED KAFFIR. Per box of 1 head Net BLACK HULLED WHITE KAFFIR. Per box of 1 head Net PINK KAFFIR. Per box of 1 head Net MILO. Per box of 1 head Net FETERITA. Per box of 1 head Net WHITE DURRA. Per box of 1 head Net BROWN DURRA. Per box of 1 head Net NEW SHALLU. Per box of 1 head Net RED KOWLIANG. Per box of 1 head Net STANDARD BROOM CORN. Per box of 1 head Net DWARF BROOM CORN. Per box of 1 head Net THRESHED MATERIAL In Screw-capped Bottles SUDAN GRASS. Per 4-ounce bottle Net AMBER SORGHUM. Per 4-ounce bottle Net WHITE AMBER SORGHUM. Per 4-ounce bottle Net SUMAC SORGHUM. Per 4-ounee bottle Net ORANGE SORGHUM. Per 4-ounce bottle Net RED KAFFIR. Per 4-ounce bottle. Net BLACK HULLED WHITE KAFFIR. Per 4-ounce bottle Net PINK KAFFIR. Per 4-ounce bottle Net MILO. Per 4-ounce bottle Net FETERITA. Per 4-ounce bottle '. Net WHITE DURRA. Per 4-ounce bottle Net BROWN DURRA. Per 4-ounce bottle Net NEW SHALLU. Per 4-ounee bottle Net RED KOWLIANG. Per 4-ounce bottle Net STANDARD BROOM CORN. Per 4-ounee bottle Not DWARF BROOM CORN. Per 4-ounce bottle Not .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .20 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 .25 MISCELLANEOUS PLANTS HEADS 9387A. WINTER RYE, Swedish Minnesota No. 2. Per box Net .20 9387B. SPRING RYE. Per box Net .20 9387C. FLAX, Blue Blossomed Dutch, Minnesota No. 25. Per box Net 20 93871). JAPANESE BUCKWHEAT. Per box Net '20 9387B. SILVERHULL BUCKWHEAT. Per box '// Net !20 9387F. RICE. Per box Net 20 9387G. COTTON. Per box Net !20 Note. — The number of heads per box of the above miscellaneous plants varies from six to twenty-five. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 61 THRESHED GRAIN 9388A. WINTER EYE, Swedish Minnesota No. 2. Per 4-ounoe bottle Net 9388B. SPRING RYE. Per 4-ounce bottle '.;.■.■.; iNot 9388C. FLAX, Blue Blossomed Dutch, Minnesota No. 25. Per 4-ounee bottle Not 9388D. JAPANESE BUCKWHEAT. Per 4-ounce bottle Not 9388E. SILVER HULL BUCKWHEAT. Per 4-ounce bottle Net 9388F. RICE. Per 4-ounce bottle ' Net 93886. COTTON. Per 4-ounce bottle V. ...'.[."'.".'.'.'.'.'.'.. ....Net For SQUARE BOTTLES only see page 90. 9389A, F, G, E. WEED and PLANT DISEASE SPECIMENS, see page 186. REB CLOVER WHITE CLOVER ALSIKE CLOVER CBIHSONCUIVER SWEET, CLOVER ALFAtEA 0.20 .20 .20 .20 .20 .20 .20 No. 9390A. SEED SPECIMENS FOR EXAMINATION UNDER SIMPLE MICROSCOPE. The sets of seeds listed below are mounted between two lantern slide plates, and are therefore especially well adapted for low power microscopical examination, since an abundance of illumination can be obtained from below; The seeds included are mainly those of clover, grasses and common weeds, and as they are put up under the direction of a prominent agriculturist at one of the large State Universities, their satisfactory character is assured. Both the common and the botanical names of the specimens are printed below them on both sides of the card. 9390A. LEaUMES Net Red Clover White Clover Crimson Clover Trifolium pratense Trifolium repens Trifolium inearnatum Alsike Clover Alfalfa Sweet Clover Trifolium hybridum Medicago Sativa Melilotus alba 9390B. WEEDS Net $ 0.35 .35 YeUow Trefoil Medicago lupulina Crab Grass Syntherisma linearis 9390C. WEEDS Dock Bum ex crispus Moth Mullein Verbaseum blattaria 9390D. WEEDS Old Witch Grass Panieum ciapillare Smartweed Polygonum lapothifolium 9390E. GRASSES Smooth Brome Bromua inermis Tall Oat Arrhenatherum elatius 9390F. GRASSES Redtop Agrostis alba Timothy Phleum pratense Dodder Cuscuta arvensis Buckhorn Plantago lanceolata Mustard Brassica nigra Broad Plantain Plantago rugelii .Not Pigweed Amaranthus retroflexus Ragweed Ambrosia artemisioefolia Lamb's-quarter Chenapodium album Wild Carrot Daucus carota .Net Chicory Cichorium intybus Vervain Verbena hastata Sorrel Eumex aeetossella Canada Thistle Carduus arvensis .Net Bermuda Capriola daetylon Italian Rye Lolium italioum Orchard Daetylis glomerata Perennial Rye Lolium perenne .Net .35 .35 .35 .35 Sheep's Fescue Festuea ovina Meadow Fescue Festuea elatior pratensis Kentucky Blue Poa pratensis Canada Blue Poa coikpressa For MATERIALS FOB MOUNTING' SEED SPECIMENS, see page 187. rv2 ■|;.NfTRAIi .SC] i:\TIFir CO.. rilK'AOO, TT. S. A. No. 9391-98. 9391. 9;i92. 9.39.'!. 9:i94. 9.'i95. 9.-590. 9:!97. 9398. SCORE CARDS In the judging of grains, fruits and vegetables our Store Cards will be found more than a convenience — they will be found indispensable when once used. They aro a saving in time, and in addition direct the student's attention to points whicli are often neglected when judging different samples. The low price should put an equip- ment in every school. Each subject is put up in tablets of 50 sheets. SCORE CARD, Barley. Per tablet of 50 sheets '. SCORE CARD, Corn. Per tablet of 50 sheets SCORE CARD, Cotton. Per tablet of 50 sheets SCORE CARD, Flax. Per tablet of 50 sheets SCORE CARD, Frnit. Per tablet of 50 sheets SCORE CARD, Oats. Per tablet of 50 sheets SCORE CARD, Potatoes. Per tablet of 50 sheets SCORE CARD, Wheat. Per tablet of 50 sheets For CHARTS of CORN and WHEAT, see page 189. SUNDRIES SPROUTING MEDIA PROPAGATING SAND, best quality, clean and fertile. Per peek SAWDUST, for germinating trays, specially selected. Per peek. SPHAGNUM MOSS, best quality, for germinating boxes. Per lb '..'.'.'.'.'.'. FERTILIZERS Prices Net. Acid Phosphate Bone Meal Dried Blood . . . Guano Gypsum (see Land Plaster). Kainit Land Plaster (Gyp„u-u) Muriate of Potash Nitrate of Soda Rock Phosphate Sulphate of Ammo i , . . . . Sulphate of Potash 9399. PERFECT PLANT FOOD ... t>,...j Julius von Sachs. Per box of 2o 5 lb. $ 0..35 25 40 40 20 15 .35 35 ■^5 [0 5 accuiuing 10 tne formula of 25 lb. $ 1.25 1.00 1.50 1.50 .65 .50 1.50 1.50 .75 1.75 1.75 Prof. .Net 0.20 .20 .20 .20 .20 .20 .20 .20 .50 .25 .25 ,10 CKNTRAL S('TI';NTTFT(^ CO., CITrCACIO, [T. ,S, A. 63 EXTRACTION APPARATUS No. 4875. No. 4876. No. 4876A. No. 4876B. 4S75. EXTRACTION APPARATUS, Soxhlet's, complete, consisting of flask, extractor, and Allilin's condenser; adapted for extraction of fat in milk analysis. Capaeitj' to top of siphon, c. c (3(1 100 200 S. & S. extraction shells to be used, mm SixSO ;'.3xS0 43x1 l;;3 Complete as above without shells $-.75 ;!.00 3.73 48 75A. EXTRACTION TUBES only of No. 4S75. Capacity, c. c (30 100 200 Each - - -- 1.10 1.35 2,10 4S7oB. EXTRACTION APPARATUS, see page 193. 4876. EXTRACTION APPARATUS, Soxhlet's, with Hopkins' inner cooled condenser, witli ground-in joint, extraction tube, and Knorr's mercury sealed flask, making an ideal combination, as the condensation is more rapid and no moisture gathers on out- side. Capacity to top of siphon, c. c 60 100 Each 4.00 5.00 4876 A. EXTRACTION APPARATUS, Friedrichs*. (Journal of the American Chemical Society, Volume XXXIV, No. 11, 1912.) This new form has the following advantages: 1. The condenser may be rigidly connected with the water supply. 2. The extraction and also the recovery of the solvent by distillation may be accom- plished in the same apparatus. 3. The manipulation of the apparatus is convenient anil rapid. 4. Danger of breakage is reduced as the apjiaratus may be fixeil securcdy and only the perforated stopper and flask need be removed. 5. The reflux sci-ew condenser insures efficient condensatiiju with minimani amount of water. Cfimpdete with fi\-e flasks of resistance glass $ 4876P,, EXTRACTION APPARATUS, Underwriters' Laboratories Pattern. See Journal of Industry and Engineering, Chemical Volume IV, No. 7, June, 1912. A ra]iid and i,i:nple form; the apparatus consists of a reflux condenser made of a spiral metal tube, from which is suspended a porcelain Gooch crucible. This system is placed in a wide, long necked, conical flask as illustrated. As the entire apparatus is only 6 inches high and 3 inches wide, it takes a minimum amount of space. This form con- forms to the Underwriters' Standard Specifications for testing rubber compounds... 12.50 2.25 64 CENTKAL Sc.'lENTlFlC CO., CHICAGO, U. S. A. -IS77. 4S77A. 4S77B. 4,S77C. 4877D. 4877E. 4S77F. 4877G. 4877H, 4S77.J. 4877P. 4S77B. No. 4877. No. 4877B. No. 4877E. EXTRACTION APPARATUS, Knorr's, as modified by Walter & Goodrich (Circ. No. 69, Bureau of Cliem., United States Department of Agriculture). Complete with con- denser and adapter, e.xtraction tube with perforated nickel lower disk, and flask for mercury seal, but without spring or upper perforated disk $ 4.35 CONDENSER of No. 4877, with adapter sealed on 3.U0 EXTRACTION TUBE of No. 4877, without perforated disk .45 SPRING for No. 4877 25 DISK, Upper, for No. 4877, of nickel .25 DISK, Upper, for No. 4877, of platinum Market price DISK, Lower, for No. 4877, of nickel .30 DISK, Lower, for No. 4877, of platinum Market price FLASKS, only, for No. 4877, with holes in neck for return flow of ether .60 FLASKS, Sy," only, for No. 4877, with holes in neck for return flow of ether .60 EXTRACTION APPARATUS, Knorr's, original form. Complete with No. 4908 Flask, 100 c.c. No. 4S77A Condenser, and No. 4877R Extraction Tube 5.75 EXTRACTION TUBE, Knorr's, original form, with perforated platinum disc sealed in 2.50 No. 4878. No. 4908. 4878. CONDENSER, Soxhlet's, globe-shaped, copper, nickel-plated, tinned inside, 4-inch diam- eter 4879. EXTRACTION SHELLS, Paper, of Fat Free Paper, for extraction apparatus, Schleicher & Schuell's, seamless, so that it is impossible for any of the substance to find its way into the solution. These shells can be used repeatedly. Diameter, mm 22 33 43 Length, mm 80 80 123 Each Net .09 .10 .20 Per box of 25 Net 1.65 1.85 3.70 4S79B. EXTRACTION SHELLS, Glass, easily cleaned, may be used repeatedly, and exact weight determined. Length, 80 mm. Diameter, mm 22 33 Each ,30 .42 4S79C. EXTRACTION SHELLS, see page 192. 4908. EXTBAOTION FLASKS, Knorr's, for mercury seal. Capacity, c.c GO 100 Each ..' ,30 .42 2.70 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 65 5095. ELECTRIC HEATER for Extraction Apparatus (after designs by Prof. W. H. Ross of the University of Arizona) . A box 80 x 20 xl2 cm. of asbestos board, containing a sys- tem of resistance coils, above which is supported a sheet iron pan. The top of the outer box is removable and has six openings through which pass the flasks of the extrac- tion apparatus which rest on the bottom of the iron pan below. The flasks thus rest on a hot plate and are surrounded by a heated atmosphere so that little current is needed. A simple switch arrangement permits the use of currents of from 1 to 4 amperes at 110 volts, the change from minimum to maximum being made in 15 steps if desired. This gives a wide range of temperature so that not only ether but ace- tone, chloroform and other solvents may be used. After extraction the solvent may be evaporated without danger of ignition. With top removed the heater becomes an ordinary hot plate. By placing a liquid in the iron box the heater becomes a liquid bath. Complete with covers for holes $ 27.75 No. 5095A. 5095A. CENCO ELECTRIC HEATER for extractions. This is No. 5095 Electric Heater pro- vided with supports adjustable in height, having clamps for each extractor and con- denser. The flasks may be located as in the illustration, or they may rest upon ttie hot plate below the cover •*• • Net 40.00 5095B. ELECTRIC HEATER for extractions. Similar in general construction to No. 5095A, but provided with six 110 volt electric lamps instead of the system of heating coils (80 that the wide range of temperatures is not available), and without the iron tray. Net 30.00 66 OKNTRAL SOIRNTTFIC CO., CHKJAGO, U. S. A. TREE HUSBANDRY PROPAGATIOI^L CHARJ. CENTHj$>.l; SCIENTIFIC COMl^^Jf -,-.^,^,^ I No. 9400. 9400. PROPA.GATION CHART. A set of miniature 'models of natural wood, 6 inclics long, representing the better and more common forms of budding and grafting. This chart will be found of great value to anyone teaching horticulture and the propagation of plants, since the models represent the work as it is actually done in the field and are, therefore, of much more value for purposes of demonstration and explanation than ordinary illustrations and written descriptions. The models are mounted upon heavy cardboard, 20 x 3G inches, to which they are so se- curely wired by an ingenious device that there is little danger of their becoming dis- placed from their proper position. The woods used in the models represent, so far as is possible, woods of the proper age to use in actual work and they appear just as they come from the orchard, except that they are coated with shellac for the purpose of preservation. The following forms of propagation are represented: Shield or T Budding. Veneer Grafting. Plate Budding. Cleft Grafting. Eing or Annular Budding. Bark Grafting. Splice Grafting. Kerf Grafting. "Whip or Tongue Grafting. Side Grafting. Boot Grafting. Brief descriptions are printed beneath each method of propagation, so that the chart is self-explanatory. Tor example, "Cleft Grafting, the more common form of retopping old trees or changing the variety of the fruit borne by the tree. Usually but two scions are placed in each stock. " $ 4.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 67 PRUNING, BUDDING, GRAFTING, PROPAGATING TOOLS No. 9401. 9401. PRUNING SHEARS, Henry's Pattern, good quality steel blade, tempered and pol- ished, with brace at back, black japanned handle, volute spring. These shears are well adapted for grape pruning and where light pruning is desired on small shrubs and trees. 8% inches long $ 0.40 ^^ '' No. 9403. 9403. PRUNING SHEARS, CaUfornia Pattern, hand forged, polished tool steel blade, lock nut, volute spring, malleable iron handle. These shears allow the pruner to make an upward close cut, thus making a wound which will soon heal over. "Well adapted for vineyard or home orchard pruning. 9 inches long .40 9404. No. 9404. PRUNING SHEARS, California Pattern, hand forged tool steel blade, full polished, lock nut, regulating ratchet, double brass spring. Many pruners prefer the double brass spring on account of the ease of operating. These shears are well adapted for regular orchard pruning and will give good service. 9 inches long 1.00 No. 9404B. No. 9404C. 9404B. PRUNING SHEARS, California Pattern, fully polished, double brass spring, adjustable lock nut. Each shear is supplied with one extra blade. A low price tool very suit- able for heavy work. (Those desiring a similar tool of higher grade are referred to No. 9404C below.) 9 inches long 9404C. PRUNING SHEARS, CaUfornia Pattern, Hunckels Twin Brand, finest quality, fully polished, double brass spring, ratchet regulating bolt, each shear supplied with one extra blade. Every pruner in a commercial orchard should have one of these high class pruning shears. They are not only durable but they enable one to do the best of pruning work. By having the extra blade the pruner can always keep these shears in perfect condition. 8% inches long 1.65 2.75 CIOXTUAL SCIENTIFIC CO., CHrcACO. S. A. 1 «». -'^^^>- '^\\'v\ ,»-WW' VWVVVVVVVWVW vv\\vV^ No. 9405. f»4ii.-,. PRUNING SAW, crucible steel, grained blade, apple handle, polished edge, three screws. This saw is well adapted for making large cuts on either shade or fruit trees. There is no danger of injur.y by bruising the bark on the remaining branch by using this saw. The teeth can be set so that this saw will cut either green or dead v/ood. 20 inches long $ 1.00 W#wwwwvw\. No. 9407. 9407. PRUNING SAW for shade trees, double edge, beech handle, three screws. One edge is designed for cutting off live or green wood branches and the other edge for remov- ing dead branches. iS inches long .75 No. 9408. 940S. PRUNING SAW, flat steel back, narrow tapered point, extra large handle for use with gloved hand, blued steel blade. This saw is designed for making clean close cuts in tight places, such as cutting out branches in crotches of fruit trees. 18% inches long EXTRA BLADES for No. 9408 Pruning Saw, each 1.25 .15 ^^^^^r/^VNTT-v^-/ J JV-fv^v /^^w/vv y. No. 9408A. 9408A. PRUNING SAW, crescent shape, crucible steel blade, beech handle, three screws. This is a draw cut saw and can be used to good advantage in cutting back branches in the tops of fruit trees. In cutting back, care should be taken to cut to a branch about the size of the one taken off. 12 inches long .65 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 69 No. 9409. 9409. PRUNING SAW, Pacific Coast, crucible steel blade. Every orchardist should have one or more of these swivel bladed saws. Any cut that can be made with a key-hole saw in pruning work can be made with this saw and also many outs where a mallet and chisel are ordinarily used. This saw enables the pruner to make all outs close to and parallel with the remaining branch. This make of saw is used by nearly all of the leading orchardists throughout the country. A dull saw blade can instantly be changed for a sharp one, thus allowing the pruner to do good and fast work. The swivel blade can be turned at any angle so that it is possible to make with ease cuts which otherwise would be difS.cult to make. 14 inches long EXTRA BLADES for No. 9409 Pruning Saw, each $ 1.50 .15 No. 9409A. 9409A. PRUNING HOOK AND SAW with knife and blade of crucible steel. Although possess- ing great strength, it is of light construction and can be used with or without a pole. The crescent shape blade has long, slender teeth so forme,d as to draw the saw into the wood. The saw blade is removable and is 10 inches long. This tool without the pole is well adapted for orchard pruning work and with the pole it can be used for training shade trees and cutting out blight in fruit trees during the summer. All dor- mant or summer orchard pruning work, with the exception of cutting out blight ap- pearing on small branches, should be done near at hand in order to avoid stubs and the splitting down of branches, etc. Without pole 1.65 No. 9409B. 9409B. PRUNING SAW AND KNIFE, high grade steel chisel and saw blade, japanned frame. Saw cuts both ways, insuring smooth and rapid execution and preventing binding^ m cutting green wood. Length of saw 10 inches. This tool is well adapted for working in shade trees. Without pole ■ 100 KXTRAL SCIENTIFIC CO.. CHICACO, U. S. A. CKXT S^^^^^^ No. 9410. 9ilO. TREE PE-XTNEB., Henry's. The blade cuts from the top and from the moment the cut is started the weight of the branch opens the gap, preventing the Itnife from binding.. This tool is designed for training shade trees and cutting out blight on small branches in fruit trees. Prices include pole. Length, feet 6 10 Priec ■ $1.00 1.25 EXTEA KNIFE for No. 9410. Will fit either length * 0.25 No. 9410B. 9410A. PRUNING SHEAR, CaHfomia Pattern, long handle, blade forged from high grade steel. Many cuts which could be made with a saw can be made with these shears thus saving time. This is a tool wluch every orchardlst should own, as it will enable him to do quick and effective work. Length 26 inches 9410B. LOPPING SHEAR, blades of English steel, with 2Vn in. cut. Length, 27 in L85 2.50 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 71 No. 9411. 9411. PKXINING KNIFE, one blade, good quality steel, iron lined, cocoa handle 4 inches long. This knife is especially good for training young trees and cutting off water sprouts. . $ 0.45 No. 9411A. 9411A. PEUNTNG KNIFE, finest quality glazed blade, cocoa handle 4i^ inches long. A high grade knife for pruning off small branches and dressing up wounds 1.00 No. 9411B. 9411B. PEUNING KNIFE, finest quality glazed blade, beechwood handle, not folding. "Well adapted for nursery pruning and training young trees. Total length S inches .45 No. 9412. 9412. BUDDING KNIFE, finest quality glazed blade, black horn handle, with folding ivory budder. This budding knife is well adapted for budding fruit trees or evergreen trees. Very high quality. Length of handle 3% inches 1.10 No. 9412A. 9412A. BUDDING KNIFE, finest quality glazed blade, beeehwood handle, not folding. Total length 5% inches. .22 CENTRAL SCIENTIFIC CO., CHICAGO, U. t^- A. No. 9413. 9113. PRUNING AND BUDDING KNIFE, two blades, i^-oV wh/slfn^^''^^'" '^''^' !^'^^'. •'' $ 0.85 and orohardist. 4 mcnes long f well adapted for both nurseryman and orchardist. No. 9413A. 9413A PRUNING AND BUDDING KNIFE, finest quality glazed blades, brass lining, German silver bolsters, stag handle 4 inches long. A high class knife for nursery and orchard work 1.10 No. 9413B. 9413B. GRAFTING AND BUDDING KNIFE, finest quality glazed blades, brass lining, German silver bolsters, ivory celluloid handle 4 inches long. "Well adapted for a small fruit grower 1.1C No. 9413C. 9413C. PROPAGATING KNIFE, finest quality glazed blade, brass lining, black handle 4 inches long. "Well adapted for marking, cutting, and grafting work .61 No. 9413D. 9413D. GRAFTING KNIFE, finest quality glazed blade, beechwood handle, not folding. A fine tool for either nursery grafting or top working of fruit trees. Total length 6% inches No. 9413E. 9418E. GRAFTING KNIFE, finest quality glazed blade, beechwood handle, not folding. Espe- cially adapted for top working of fruit trees. Total length 8 inches CBNTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 73 9il3F. 9413F. GRAFTING CHISEL, as described in Farmers' Bulletin No. 408 of the United States Department of Agriculture; -with curved blade 3% inches long, and chisel y» inch wide. This grafting tool is well adapted for cleft grafting in top working of fruit trees. In use, the limb is first sawed ofE to from 1 to 11/2 inches in diameter, split with the blade of the tool, spread with the wedge chisel, and the scions are then inserted. Total length 10 inches ^ 110 303. MALLET, Wood, 3-inch face, for use with No. 9413F Grafting Chisel. A very handy tool to be used with the cleft grafting tool for top working of fruit trees .22 No. 9414. 9414. BUDDING TOOL, White's. A Scientific Instrument designed for the propagation of trees by the Annular, Semi-Annular, Patch and Veneer Methods. This tool has been in continual use in the largest pecan nursery and grove in the coun- try for some years, and has received many fiattering recommendations from prominent horticulturists, nurserymen and others. Seedlings from % of an inch to a trunk or branch 3 inches or over in diameter can be budded with it. The tool may be dropped, but on account of the greater weight being at the hinge, it automatically closes in fall- ing and the hinge strikes the ground first. Thus the blades are always protected. The tool may be laid on the ground without blades coming in contact with the soil. The tool can be hung over a limb while the bud is being wrapped. It can be safely and conveniently carried in the pocket.^ The holes in the handles between each pair of blades admit light to see that the tud is in the center of the annular out. The blades are made of the finest steel and are very durable. The graduated caliper holes are of standard gauges and can be used for calipering stock and budding wood where a close, complete, annular fit is desired. Danger of spiral cutting is minimized with this tool. The resiliency of the handles makes the tool adapt itself to any stock without regard to tapering and without cut- ting into sapwood on the lower cut Net ■2.75 GRAFTING SUPPLIES 9415. GRAFTING WAX, prepared according to formula by Prof. L. H. Bailey. Per pound. Net ; 9417. TAPE, for binding wax to grafting wounds. Per roll of ten yards, % inch wide ■ 9419. RAFFIA, for grafting, long strand, first quality, natural color. Per 1/2 lb. hank Per 5 lb. bundle 9420. TWINE, 8 ply cotton, for grafting. Per % lb. ball 9421. KNITTING COTTON. No. 18. Per ball For CHART on GRAFTING, see page 189. .35 .11 .17 1.50 .22 .09 74 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. FORESTERS' INSTRUMENTS 11 12 13 14 15 1G 17 la 9435. 9437. 9450. No. 9435. V No. 9450. TREE CALIPEE, 18 inch, of fine seasoned hardwood, best workmanship, both sides of beam graduated to lOths inches and plainly numbered. The arms are removable for convenience in transportation. The stationary arm is held by brass clamp nut with lock nut. The eye of sliding arm is brass lined all around TKEE CALIPEES, same as No. 9435, but with two clamp nuts. Length, inches 24 30 50 Price 4:50 5.20 6.80 CLINOMETEE, Service Pattern, for .measuring angles of elevation and depression. In use this instrument is held vertically in the left hand so that light passes through the window A and illuminates the scale. By looking through the side hole D and the small window E at the object to be observed, the graduations on the arc F will be seen re- flected in the mirror G. If the knob B is then released, the scale will swing freely and the observed reading will show the number of degrees elevation or depression from to 45 degrees, elevations being denoted by red figures and depressions by black. Complete as described in sling case Duty Free $ 4.00 12.50 No. 9451. 9451. CLINOMETER, Abney's Reflecting Level or Pocket Altimeter. A very useful and universal Clinometer. Used for getting the height of buildings, trees, hills, etc., and also for fixing the slopes for railroads, the rise and fall of ground for drainage pur- poses, and all operations where angular distance or inclination of surface is desired. Sighting tube 5 inches long, large German silver arc, extra long draw eye-piece, im- proved fixing clamp to vernier. The arc has two graduated scales upon it, one giv- ing the angular measurements by degrees, and subdivided to 10 minutes by the ver- nier divisions on the index. The other scale is figured 1 to 10 with their subdivi- sions, representing 1/10, 1/5, 1/3, etc., of the length of the measured base, and is read ofE by the fiducial edge at the side of index. If, therefore, the edge coincides with division 4, the height of object would be one-fourth of the base line, etc. Com- plete in leather case, with directions Duty Free For HYPSOMETEE see next page. 11,00 CBNTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 75 No. 9455. 9454. COMPASS, Surveying and Sight, 3% inch. An especially good instrument for ap- proximate work, since it is of very substantial construction and will therefore bear the rough usage often happening in this kind of work. The exact magnetic vari- ation can be obtained by revolving the inner circle (showing 30 degrees from zero either JEast or West) by means of its milled edge. A vernier is attached for closer reading. Complete with 3% inch bar needle, jewelled center and stop, and ball and socket mounting (Jacob Staff), in a specially braced block sling leather case Duty ■ Free $ 20.00 9455. COMPASS, Surveying and Sight, 5 inch. Same as No. 9454, but with 4% inch bar • needle Duty Free 22.50 No. 9460. 9460. HYPSOMETES for measuring heights of trees, buildings, etc. Consists of sight tube and balance circle Clinometer. Complete in a leather case with table and instruc- tions for use Duty Free 10.50 76 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9463. No. 9470. 9463. INCREMENT BOBEB for determining the^ age or judging the rate of growth of standing timber; also for noting the dep'th of penetration of a wood preservative and its effect on cellular structure. By means of this borer, a smooth clean core may be removed from the wood so that the observations may be carefully made. For use in either hard or soft woods. Length of bore, mm 60 150 250 Price, each. $4.80 9.60 18.50 9470. TREE TAPE, giving directly the diameter of tree when its circumference is meas- ured. Metal lined hard leather ease with nickel-plated trimmings, folding flush han- dle opened by pressing upon a pin on opposite side. The tape is of steel % inch in width and 50 feet long, graduated on one side in feet, tenths, and _ hundredths, and on the other side in diameters (inches and tenths of inches). Fitted with a special peg or spike for fastening to tree. (Not shown in illustration.) $ 6.00 -ri-ihi3|iTil'i4lTriiif5li!-ihi6, No. 9475. 9475. BOARD RXTIiE, three tier, extra heavy diamond head, figured 30 inches with 6 inch handle; full length 3 feet; for boards from 8 to 18 feet long 1.50 No. 9478. 9478. LOG RULE, Doyle Scale, solid hook, figured 48 inches with 8 inch handle; 4 feet 8 inches; for logs from 12 to 24 feet long 9479. LOG RULE, Scribner Scale, otherwise same as No. 9478 full length 1.65 1.65 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 77 ANIMAL HUSBANDRY No. 9501, 9500. IOWA BECOBDING AND INTEGBATING TBACTION DYNAMOMBTBB. Designed by Prof. J. B. Davidson, Chief of Agricultural Engineering, Iowa State College of Agriculture and Mechanic Arts, Ames, Iowa. Send for Special Circular. 9501; DYNAMOMETEBS. Used for ascertaining the draft of plows, mowing machines, wagons, etc. Can be attached to a tackle or a derrick for hoisting hay, feed, etc., the weight of which can at once be read on dial. Will also show what weight a horse can pull by securing one end and hitching an animal to the other. Each dynamometer is supplied with a loose pointer to remain at maximum strain. Range, lbs 500 2,000 3,500 5,000 10,000 Smallest graduation, lbs 5 25 50 50 100 Price $36.00 36.00 42.00 48.00 80.00 9503. DOUBLE-TEEE APPABATTJS, for deter- mining the correct position of the single- trees, so that the double-tree may be an evener. This apparatus is essentially a lever of the first class. It consists of a cast iron base smoothly finished and painted, to which is attached an up- right standard. At the top of this stand- ard is a brass fork, in the prongs of which are cut V's in which rest the axis passed through the central point of the polished brass beam which represents the double-tree. Pins, which represent at- tachments of single-trees to the double- tree are provided to fit into holes drilled in the brass beam, two of which holes are equidistant from the central point and in the same straight line with it. A string resting on these pins is connected at its extremities with two brass scale pans of equal weight. The scale pans represent the draft and the strings the line of draft. A metal scale, one end of which is fastened at its zero point J;o the upright in a line directly beneath t-he central point, serves as a measure in determining the distance of the lines of draft from this central point. The base is provided with screws and the apparatus is furnished with plumb bob for leveling. Complete as illustrated $ 15.00 9503. 7S CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9504. 9504. GBADE-DRAFT APPARATUS. This ingenious device designed by Prof. Gibbs dem- onstrates clearly and easily the factors governing grade-draft. With each instru- ment is sent a pamphlet as a, guide in the quantitative study of the following prob- lems: 1. Effect of Size of Wheels on Draft. 2. Effect of Wide and Narrow Tires on Draft. 3. Sliding and Rolling Friction. 4. Effect of Size of Axle on Draft. 5. Effect of Road Grade on Draft. 6. Effect of Road Obstruction on Draft. 7. Effect of Angle of Hitch on Draft. The apparatus consists of a substantial metal base provided with three leveling screws, to which is attached a casting to support the metal track. The device illus- trated resting on the track is built up in sections in such a way that discs 4.5 and 1.5 inches in diameter may rest on the track at will. These discs represent large and small wheels and are used in the study of Effect of Size of Wheels on Draft. The 4.5 inch disc is further divisible into two sections % and % inch thick repre- senting % and % inch tires in the study of Effect of Wide and Narrow Tires on Draft. The line of draft in all experiments is represented by the string attached to the. car- riage. This string is run over a pulley adjustable in the segment to vary the Angle of Hitch. It then passes over a second pulley to a pail to which it is attached. This pail with the different quantities of bird shot which may be added repre- sents the draft. In the study of draft relative to hard and soft roads, leather strips, which represent the soft road, are provided, which may be attached to the steel track. A road ob- struction is represented by two metal pieces (shown in front of wheels) which may be placed on the track giving an obstruction 0.05 inch high. This instrument is accurately made in every detail and quantitative results md,y eas- ily be obtained with a high percentage of precision. Its utility in demonstrating in the laboratory factors dealing with problems of draft will recommend it to both Physicists and Agriculturists. Complete with large and small pail and full experimental directions $ 45.00 1608. LEAD SHOT, for use with No. 9504 Grade Draft Apparatus, per lb .16 For CHART on THE PLOW, see page 189. CENTRAL SCIENTIFIC CO., . CHICAGO, U. B. a. 79 Nos. 9505-9513. SCORE CARDS la the judging of animals our score cards will be found indispensable when once tried. They save time and in addition are instructive in that they direct the student's attention to qualities and defects which might otherwise be overlooked. The low price should put an equipment in every school. Each subject is put up in tablets of 50 sheets. 9505. SCORE 9507. SCORE 9509. SCORE 9723. SCORE 9511. SCORE 9513. SCORE 9515. CARDS, Light Horses. Per tablet of 50 sheets. CARDS, Draft Horses. Per tablet of 50 sheets. CARDS, Beef Cattle. Per tablet of 50 sheets . . CARDS, Dairy Cattle. Per tablet of 50 sheets. CARDS, Sheep. Per tablet of 50 sheets CARDS, Hogs. Per tablet of 50 sheets $ 0.20 .20 .20 .20 .20 .20 MEASURING INSTRUMENTS _i_ No. 9515. MEASURING STANDARD, graduated on one edge in hands and quarters, and on the other in feet and inches. Length, 6Vo feet. Sliding arm held by spring and pro- vided with level i 4.111 2 1.50 5 4,50 No. 335. y 335. STEEL POCKET TAPE, Metric and EngUsh, in German silver ease with spring wind and stop. Graduated in millimeters and 16ths of inches. Length, meters 1 Price 1.00 336 LINEN POCKET TAPE, Metric and EngUsh, in nickel-plated brass case with spring wind and center stop. Graduated in millimeters and 16ths of inches. ^ Length, meters g„ yg Price .,......•• * * ...• 337A LINEN pis'cKET TAPES, EngUsh, extra grade, waterproof coated, in patent ieather case, with brass folding handle and trimmings; 40 feet, $0.85; 100 feet For other TAPE see page 107. 9516-9. ANIMAL CALIPERS and MEASURING CHAINS, see page 188. 1.50 80 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. VETERINARY MODELS AND CHARTS No. 9521. 9521. 9523. 9527. 9529. 9531. 9533. 9534. 9535. 9537. MODEL OF HOBSE, 60 cm. to 70 em. high, showing clearly the muscles on both sides. The left side with one foreleg is removable exposing the interior organs in their exact location. Many of these are removable so as to expose to view the most important blood vessels, etc. A very exact model of the highest pedagogical value. .Duty Free $ 180.00 MODEL OF HORSE, one-fifth natural size, entirely dissectible Duty Free 75.00 HEART OF HORSE, natural size, dissectible Duty Free 13.20 INTESTINAL CANAL OF HORSE Duty Free 12.00 KIDNEY OF HORSE Duty Free 8.40 BRAIN OF HORSE, divisible into two parts Duty Free 4.00 BRAIN OF HORSE, divisible into four parts Duty Free 8.00 GENITALS OF STALLION, natural size, longitudinal cross-section Duty Free 14.40 GENITALS OF MARE, natural size Duty Free 14.40 9539. TEETH OF HORSE, Lower Jaw, showing ten stages of development Duty Free 8.00 TEETH OF HORSE, Upper and Lower Jaw, showing the following ages: 6 months, 1, 3, 4, 5, 6, 7, 8, 9, 10, 12, 15, 18 and 26 years Duty Free 36.00 HEAD OF HORSE, natural size, mounted on a stand; showing on one side a median cross-section and on the other the muscles, blood vessels and nerves. . Duty Free 36.00 EYE OF HORSE, five times enlarged, mounted on a stand; dissectible Duty Free 10.80 EYE OF HORSE. Vertical cross-section, many times enlarged; shows clearly the location of the coats of the eyeball, the vitreous humor, the crystalline lens with its suspensory ligament, the ciliary muscles, the iris, the pupil, the entrance of the optic nerve through the coats, etc Duty Free 12.00 EAR OF HORSE, five times enlarged, dissectible. Duty Free 44.00 HOOFS OF HORSE, collection of 37 models showing healthy and diseased hoofs. Entire collection. Duty Free 60.00 HOOF OF HORSE, Fore, divisible into three parts. With shoe Duty Free 6.40 9550A. HOOF OF HORSE, Hind, without shoe and not divisi- ve Duty Free 2.80 No. 9549. 9541. 9543. 9545. 9546. 9547. 9549. 9550. CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 9561. 9551. MODEL OF COW. One-third natural size. Shows on one side the muscles and princi- pal blood vessels; the digestive organs are removable arid dissectible Duty Free $ 96.00 9553. MODEI. OF COW, one-fifth natural size, entirely dissectible Duty Free 75.00 9555. UDDEB OF COW Duty Free 7.20 9557. STOMACH OF SHEEP, dissectible. . Duty Free 12.00 9559. INTESTINAL CANAL OF AN OX Duty Free 9.60 9560. STOMACH OF OX. One-half natural size. Completely dissectible Duty Free 24.00 9561. LUNG OF A RUMINANT Duty Free 12.00 9563. FOOT OF OX. Natural size, divisible into four parts Duty Free 10.00 9565. FOETUS OF OX, in utero, early stages Duty Free 10.40 9567. HEAD OF OX. Natural size, mounted on a board to show cross-section through the frontal sinus, brains, nose, throat and larynx Duty Free 16.00 9569. KIDNEY OF OX, natural size, dissectible Duty Free 8.40 9571. FOETUS OF A SHEEP, in utero, natural size Duty Free 9.60 9572. FOETUS OF SWINE, in utero, natural size Duty Free 17.60 9573. BKAIN OF OX, four pieces Duty Free 8.00 9575. LAKYNX OF A SHEEP, showing muscles; divisible into two paits Duty Free 4.80 CHARTS 9578. 9581. No. 9578. VETERINARY ANATOMICAL CHARTS, set of six showing Horse, Mare, Cow, Bull, Pig and Dog. Mounted on linen with rollers Duty Free CIRCULATORY SYSTEM OF A RUMINANT, excellent execution in color. Consists of two charts. Mounted on linen, with rollers Duty Free For other CHARTS, see page 189, 12.50 7.50 82 CENTRAL SCIENTIFK; CO., CHICAGO, V. S. A. No. 9585. MODELS OF THOROUGHBRED ANIMALS 9585. A. B. C. 9587. A. B. C. D. E. F. G. H. J. K. L. 9589. A. B. 9590. A. B. C. These models are from some of the most noted European thoroughbreds. They are made of plaster of paris and are carefully painted in characteristic colors. All models are well reinforced with wire and are one-sixth life size in the case of the horses and oxen, and one-fourth life size in the case of the hogs and sheep. MODELS OF HOKSES, made at Eoyal Saxon Stud at Moritzburg. Each . . Duty Free $ 15.00 "Ehrenhafte," Oldenburg Stallion, 2 years old. "Clairon," Belgian Stallion, 4 years old. "Mylon," East Frisian Stallion, 3 years old. MODELS OF OXEN, made at the Eoyal Veterinary High School at Dresden. Each Duty Free 15.00 Simmenthaler Bull. Simmenthaler Cow. Shorthorn Cow. Pinzgauer Cow. English Cow. French Cow. Swiss Cow. Black Speckled East Frisian. Bed Speckled East Frisian. East Frisian Bull. European Bison, model made from life in the Zoological Gardens at Dresden, 1913. MODELS OF HOGS, large, white thoroughbreds. Each Duty Free 12.00 "Derby IV," Breeding Boar. No. 713, Breeding Sow. MODELS OF SHEEP. Each Duty Free 11.75 East Frisian Ewe, modeled at the Eoyal Veterinary High School at Dresden. Bast Frisian Ram, modeled at the Eoyal Veterinary High School at Dresden. Moorland Sheep, modeled at the Dresden Zoological Garden. CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 83 CATTLE AND POULTRY INSTRUMENTS ■11 No. 9591. 9591. CATTLE INSTRUMENT CASE. Polished oak case containing the following instru- ments and supplies: Milk Fever Outfit, Dose Syringe, Trocar for Bloat, 3 Lead Probes, 2 Milk Tubes, Teat Dilator, Teat Slitter (or Bistoury), Teat Opener, Fever Thermometer, Cake of Animal Soap, and two Bandages. Value if purchased sepa- rately, $15.00. Our price, with full directions Net $ 10.00 1 R 1 H /p*^^^^^^^ ^M /M^M Hm di ^^=^ ^^^^Hv ^ ^IJb lUmMi^k ^ ^Uu , ■ m No. 9592. 9592. CATTLE INSTEUMENT CASE. Large polished oak case containing the same instru- ments and supplies as No. 9591, and in addition a complete Garget Outfit, and a Sinus (or General Syringe). Value if purchased separately, $21.00. Our price, with full directions Net 15.00 No. 9597. 9597. TUBBBCUIiIN TESTING OUTFIT, Boston, consisting of syringe, three needles, tro- car, thermometer and 40 c. c. of Tuberculin, which is sufficient for ten tests.. Net 9597A. TUBERCULIN, H. K. MuIford'B, 40 C. c; sufficient for ten tests Net 5.00 1.25 84 CENTRAL SCIENTIFIC CO., CHICAGO, IT. S. A. No. 9598. 9598. MILK FEVER APPAEATUS, Boston, fitted with improved non-return flow valve milk- ing tube. The apparatus provides for the injection of sterilized atmospheric air through each teat until the udder is distended Net $ 3.50 No. 9598A. 9598A. VETERINARY THERMOMETER, first grade, pear-shaped bulb, ring top, with magni- fying tube, in hard rubber case, with certificate Net 1.25 No. 9599. No. 9599A. 9599. CAPONIZING SET. Includes Cords, Knife, Spring Spreader, Hook, Probe, Caponizing Canula and Curved Spoon Forceps. Complete with instructions in a velvet lined case . .Net 9599A. CAPONIZING SET. Similar to No. 9599, but with a Special Testicle Remover in place of the Caponizing Canula, and an improved Spreader. Complete with directions in an oak ease Net 9599C.KILIJNG KNIFE. (See page 189.> Net 129A. POULTRY CALIPER. (See page 189.) 9599H. SCORE CARD, Eggs. Especially valuable in judging eggs, since the student 's attention is directed to qualities and defects, which might otherwise be overlooked. Per tablet of 50 sheets For CHART on THE CHICKEN, see page 189. 2.75 4.oe .50 4.45 .20 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 85 DAIRY HUSBANDRY BABCOCK MILK TESTERS The milk testers here listed are all of the well known "Facile" and "Facile" Jr. types, which are undoubtedly the best on the market. They are unhesitatingly guar- anteed to give complete satisfaction. HAND-POWER MACHINES No. 5056. No. 5057. 5056. BABCOCE MILK TESTER, two bottle size. This is the original design for the spiral, gear-driven open- Babeock Machine. The machine itself consists of but two castings' forming the gear case. These are united at a ground joint, so that the gear case is oil tight, this construction being exclusive to the "Facile." The machines are sent out packed with a high grade semi-fluid lubricant which keeps the entire machine lubricated for a long time. There is only one large gear and the vertical spindle which has spiral teeth milled directly into it. Both of these are made of steel, and as they run in grease, they are absolutely noiseless and run with a smoothness that can not be approached by any other type of gearing. The bottle carrier, which is removably attached to the top of the spindle, . is a heavily, tinned malleable casting. The rotating pockets are of seamless brass, of heavy gauge, swaged over and soldered to heavy malleable trunnions. These are secured in "place in the bottle carrier by rivets, so that there is no chance for any of the parts to fly ofE while in motion. These machines are absolutely safe, something that should be considered in buying an open 3abcock Tester. The seamless pockets, which swing to a perfectly horizontal position when at speed, are of the proper depth to contain hot water to submerge the bottles and keep the fat in the neck in a melted condition so that an accurate test can be made. The machine can be attached to any table, or bench, by means of the thumb screw. It does not require any separate clamp, or any bolts or screws. Complete with two 6 inch, 18 gram, 10 per cent Milk Test Bottles; one 17.6 c.c. Pipette; one 17.5 c.c. Acid Measure; one Test Bottle Brush and full directions for use. (For Acid see page 87.) ; Net 5056A. BABCOCK MILK AND CREAM TESTER. Same as No. 5056, but with two 6 inch, 18 gram, 10 per cent Milk Test Bottles; two 6 inch, 18 gram, 30 per cent Cream Test Bottles; one combined 17.6-18 c.c. Pipette; one 17.5 c.c. Acid Measure; one Test Bottle Brush, and full directions for use. (For Acid see page 87.) Net i 5057. BABCOCK MILK AND CREAM TESTER. Same as No. 5056A, but four bottle size. Complete with four 6 inch, 18 gram, 10 per cent Milk Test Bottles; two 6 inch, 18 gram, 30 per cent Cream Test Bottles; one combined 17.6-18 c.c. Pipette; one 17.5 c.c. Acid Measure; one Te.st Bottle Brush, and iull directions for use. (For Acid see page 87.) Net 9607-9607V. REPAIR PARTS for above Babeock Testers, see page 187. $ 4.00 4.50 5.50 8P CENTRAL SCIENTIPIC CO., CHICAGO, U. S. A. No. 6058. Showing Gear Case of No. 5058. 5058. BABCOCK MILE TESTES, improved iron frame for hand power. Compact and service- able. Solid iron case, with hinged cover. The gearing consists of a pair of worm or spiral gears, and a pair of spur gears. All the gearing and shafts are mounted on a sepa- rate frame, which is detaehably secured to the under side of the body or case. This is a patented feature of the "Facile." A new feature in the construction of this gear frame, or yoke, is that it is made to entirely enclose the gears, being fitted with a detachable cover, having a ground joint, and the gears being packed in lubricating grease. This makes the gears run smoothly and noiselessly, and keeps them lubricated indefinitely, protecting them from wet and consequent rust. The separate illustration of the gear frame clearly shows not only the compact nature of the gearing, but also the oil-tight gear case. The bottle carriers are solid malleable castings, heavily tinned. The swinging pockets are of seamless brass with tinned malleable hangers. The bottles are perfectly hor- izontal when rotating. Prices include one set of six-inch, 18 gram, 10 per cent Milk Test Bottles, one 17.6 c.c. Pipette, one 17.5 c.c. Acid Measure, one Test Bottle Brush and full directions. (For Acid see page 87.) Order Letter A B . C D Number of Bottles 6 8 10 12 Price, each Net $9.00 10.00 12.00 14.00 9609. BABCOCK CREAM TESTER, twelve bottle size. Same as No. 5058 Milk Tester, but for 9-ineh cream bottles. Complete with twelve 9-ineh, 18 gram, 30 per cent Cream Test Bottles, one 18 c.c. Pipette, one 17.5 c.c. Acid Measure, one Test Bottle Brush, and full directions Net No. 9610. No. 9611. ELECTRIC MOTOR DRIVEN MACHINES 9610. BABCOCK MILK TESTERS. Same style as Nos. 5056-7, but mounted directly on a vertical spindle electric motor. Prices include same glassware and accessories as Nos. 5056-7. (For Acid see page 87.) Order Letter j^ g q jj Number of Bottles 2 2 4 4 X°.^tage 110 D.C. 110 A.C. 110 B.C. 110 A.C. Price, each Net 35.00 35.00 36.00 36.00 9611. BABCOCK MILK TESTERS. Same frame and bottle carrier as No. 5058. The motor is carried _ on a separate frame or sub-base, and is provided with a starting device. Prices include same glassware and accessories as No. 5058. (For Acid see paee 87 ) Order Letter ^ B C Number of Bottles ...'..'.'.'.'.'.'. 6 8 12 Price, each, for 110 volts, D. C '..['. .Net 51.00 52.00 56.00 Order Letter D E F Number of Bottles ] ' g 8 12 Price, each, for 110 volts, A. C Net 51.00 52.00 56.00 $ 28.00 CENTEAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 87 TRAVELING OUTFITS No. 9616. ;^613. Floating Dairy Thermometer. Hydrometer Jar, 10 x 1% inches. 17.5 o.c. Acid Measure. Small Quevenne's Lactometer. Set Directions. BABCOCK TEST TRAVELING OUTFIT, consisting of two bottle Babcock Tester of No. 5056 and following accessories: 2 Six-inch, 18 g., 10% Milk Test Bottles. 1 2 Six-inch, 18 g., 30% Cream Test Bottles. 1 2 Double Neck Skim Milk Bottles. 1 1 Cream and Milk Pipette (17.6-18 c.c.). 1 1 Test Bottle Brush. 1 In handsomely finished hardwood case with separate compartments for glassware and acid. (For Acid see below) Net BABCOCK TEST TRAVELING OUTFIT, same as No. 9613, but with four bottle Bab- cock Tester of No. 5057, and two extra Milk Test Bottles : Net BABCOCK TEST TRAVELING OUTFIT, consisting of No. 5057 Babcock Tester in a handsome leather case as shown in the illustration. The case is 10% x 10% x 10% inches outside, and contains the same equipment of glassware and accessories as listed under No. 9615 above. Complete - Net For BKPAIB PARTS for Testers of above Outfits, see page 187. ACID FOR MILK AND CREAM TESTERS Since acids must now be shipped in separate boxes, we are no longer listing the neces- sary sulphuric acid with each Babcock Milk Tester. When the acid is desired, it should be selected from the following list: 5059. SULPHURIC ACID, for use with Babcock Milk Testers, in bottles or car- boys as below: 9615. 0616. Order Letter A B C D B Weight, pounds. . . 1 2 4 9 200 (Approx.) Per bottle ...Net $0.25 .30 .50 .70 Per carboy . . .Net 4.66 Carboys are charged for at $2.00 each in addition to the above price and will be credited at the price paid if received by us in good condition with the return charges paid. The above acid is of proper strength to give correct results with the Babcock Test. If the acid is too strong, the fat is charred; if too weak, the casein is not wholly dissolved. The strength is indicated by the specific gravity which should be tested by No. 501SL Acidometer. 5018Li. ACIDOMETER, for testing the specific gravity of sulphuric acid to be used in connection with the Babcock Test. The acid should have a specific gravity between 1.82 and 1.83 at a temperature of 60 degrees, and by allowing this instrument to float in the acid and reading off the graduations at the level of the acid the strength can be told at a glance -. 9618-9. BABCOCK MXLK TESTERS, International, see page 190. $ 9.00 10.00 25.00 n \ .75 d No. 5018L. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. TEST BOTTLES 's==5» 30- 14 CENTFWLSCIEJITIFiyO- 90 80 70-: 60 551- 50| 45| 405 ,ll ' 35 30 25^ 20 . Ill = iis-i lio- hi w 7l>v No. 5060B. No. 5060F. CEN7HflL,SCIEHriFlGC0. No. 9643. ftNlBALSCIHTIFIcrcO. No. 5060A. Per doz. 9620. MILK TEST BOTTLE, 6 ineh, 18 gram, 8 per cent. Graduated to 1/10 per cent $ 1.65 5060A. MILK TEST BOTTLE, 6 inch, 18 gram, 10 per cent. Graduated to 2/10 per cent 1.60 5060B. CEEAM TEST BOTTLE, 6 inch, 18 gram, 30 per cent. Graduated to i^ per cent 2.00 5060C. CEEAM TEST BOTTLE, 6 inch, 18 gram, 40 per cent. Graduated to 1 per cent 2,20 5060D. CEEAM TEST BOTTLE, 6 incli, 18 gram, 50 per cent. Graduated to 1 per cent 2.20 5060B. CEEAM TEST BOTTLE, 6 in., 9 gram, 50 per cent. Graduated to 1/2%. Direct reading 2.60 5060F. SKIM MILK BOTTLE, ' 'Perfect," 6 inch. Graduated to 1/100 per cent 7.20 5060G. CEEAM TEST BOTTLE, 9 inch, 18 gram, 30 per cent. Graduated to 2/10 per cent 3.00 POeOH. CEEAM TEST BOTTLE, 9 inch, 18 gram, 50 per cent. Graduated to V2 per cent 3.00 5060 J. CEEAM TEST BOTTLE, 9 inch, 18 gram, 55 per cent. Graduated to % per cent 3.00 5060K. CEEAM TEST BOTTLE, 9 inch, 18 gram, 100 per cent. Graduated to 1 per cent 4.00 NOTE. — Nine-inch Cream Test Bottles are too long for regular Babcock Testers. See No. 9609 Cream Tester, page 86. STANDARD MILK AND CREAM TEST BOTTLES The following bottles (Nos. 9632-9634) are made in accordance with the specifications formulated by the Bureau of Standards, Washington, D. C, and adopted by the Oflicial Dairy Instructors' Association, and by the State of Indiana. Per doz. 9632. MILK TEST BOTTLE, Standard, 6 in., 18 g., 8 per cent. Graduated to 1/10 per cent. . 2.75 9633. CEEAM TEST BOTTLE, Standard, 6 in., 9 g., 50 per cent. Graduated to 1/2 per cent. . . 3.35 9634. CEEAM TEST BOTTLE, Standard, 9 in., 9 g., 50 per cent. Graduated to % per cent. . . 3.35 The following bottles (Nos. 9636-9641) are made in accordance with the specifications formulated by the Dairy and Food Commission, Madison, "Wis. 9636. MILK TEST BOTTLE, Standard, 6 in., 18 g., 10 per cent. Graduated to 2/10 per cent. 2.00 9637. CEEAM TEST BOTTLE, Standard, 6 in., 18 g., 30 per cent. Graduated to % per cent. 2.25 9638. CEEAM TEST BOTTLE, Standard, 6 in., 18 g., 40 per cent. Graduated to % per cent. 2.50 9639. CEEAM TEST BOTTLE, Standard, 7% in., 18 g., 50 per cent. Graduated to 1/2 per cent. 2.75 9640. CEEAM TEST BOTTLE, Standard, 9 in., 18 g., 30 per cent. Graduated to 2/10 per cent. 3.35 9641. CEEAM TEST BOTTLE, Standard, 9 in., 18 g., 50 per cent. Graduated to 1/2 per cent. 3.35 9643. BUTTEE TEST BOTTLE, Illinois, designed by N. "W. Hepburn of the University of Illi- nois. This is a 9-inch bottle for testing 9-gram samples of butter. The neck" is grad- uated for reading up to 90 per cent and the results obtained compare very favorably with those obtained by chemical analysis 4.25 CENTRAL SCIENTIFIC CO., CHICAGO, IT. 8. A. 89 GLASSWARE AND ACCESSORIES FOR MILK AND BUTTER TESTING Arranged Alphabetically ll«lilil«)lilllSnlni»« iBffi!«L/ pii'mS No. 5060T. AGWia No. 9650. No. 5060S. 9650. ACID BOTTLE, Combined. By tipping the bottle forward and then letting it come back to upright position the pipette will fill with 17.5 ce. of acid ACID BOTTLE TRUNNION. Convenient for handling No. 9650 Acid Bottle. Base of wood covered with lead, which is not acted on by sulphuric acid. Bottle automatic- ally returns to position after tipping 5060T. ACID BURETTES. Number of charges of 17.5 c.o 3 Each 2.00 9655. ACID BURETTES. Number of charges of 8.8 c.c Each ' 5060E. ACID DIPPER, Nafis' Style, 17.5 c.c. Per dozen 5060S. ACID DIPPER, Nafis' Style, 8.8 c.c. Per dozen 9652. $ 3.00 1.50 6 2,00 6 2.00 12 2.50 12 2.50 25 3.00 25 3.00 3.00 3.0C No. 5060U. No. 5066E. 5060U. ACID MEASURE, cylindrical jar with lip, 17.5 c.c. Per dozen 9659. ACID MEASURE, cylindrical jar with lip, 8.8 c.c. Per dozen 5066E ACID PIPETTE, Automatic, Farrington's. Consists of a two-neck WoulfE bottle, one neck being fitted with a No. 5124A Automatic Pipette, delivering 17.6 c.c; the other neck with a No. 4613 Double Rubber Bulb. Complete For ACIDOMETER see page 87. For ACID TESTS see page 96. For ALKALINE TESTS see page 96. For APRONS see page 119. 1.0 1.0 5.0 90 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. "y-^ ^^' ^ No. 9663. 9663. CEEAM BALANCE, Wisconsin Hydrostatic. This balance has been devised to meet the demand for a simple and correct method of weighing cream into test bottles and consists of a specially- devised brass float, which is placed in a cylinder of water. The instrument is' weighted so as to float in a vertical position and has at the top a small pan on which a cream bottle and a 9-gram weight are placed. By means of an adjustable pin point, the point to which the float sinks in water is readily marked. The 9-gram weight is then taken from the pan S':d the cream to be tested is weighed by dropping it slowly into the bottle with a pipette until the float sinks to the same point it reached with the weight on the pan, when the tost bottle will contain exactly 9 grams of cream. Very accurate weighings can be made with this instrument and as there are no bearings to rust it will retain its sensitiveness indefinitely. Complete with metal cylinder, float, and 9-gram weight, but without bottle Net For other BALANCES for Milk and Cream Testing see pages 125-6. SAMPLE BOTTLES AND JARS 4:550A. BOTTLES, Bound, metal screw capped, for samples. Caps cork lined. Capacity, ounces 2 4 8 Per dozen .75 1.05 1.30 4550B. BOTTLES, Square, metal screw capped, for samples. Caps cork lined. Capacity, ounces 2 4 8 Per dozen .75 1.05 1.30 $ 3.50 V!iH* .7 _r.- lib- '"" li5 ^ iK IllliiUi^' I l_Lill I ILI 1 1 1 1 1 IIIJXI LLHi^ I h I < I I 'IE- -ol.L 111 souoi IIIJ ' ,l9._-' Is ' No. 5067. 5067. SLIDE SCALE, Richmond's, for calculating the total solids in milk, wilh scale for temperature correction of specilic gravity. This slide rule will be found of great ad- vantage and service to cheese factorymen and milk inspectors, as well as those inter- ested in tlie preparation and examination of milk for use of children and invalids. . 3.50 96 i:XTKAI. SCIHNTIKIC •'O.. CIIICAGO, U. S. A. 9730. 9731. 9732. l-piii No. 9730. Patent Applied For, No. 9734. No. 9731. ACID TEST, Marschall, for accurate rletermination of the acidity of milk, cream, and whey. Exceedingly simple, and equally valuable for the beginner and the expert. (Considered a necessity by all first-class butter and cheese makers. Set includes Combined Burette and Bottle for neutralizer, 9 0. e. Pipette, Bottle of Indicator, and half gallon Bottle of Neutralizer. Complete Net ACID TEST, Nafis'. This acidity testing apparatus is automatic, easy to manipu- late, and self-adjusting. The liquid instantly readjusts itself to zero so that the only reading to be taken in using the apparatus is at the point on the graduated scale where the liquid surface is located after the sample is neutralized. Complete as illustrated, together with Neutralizer, 9 o. o. Pipette, Stirring Eod, Beaker, 2-ounee Bottle of Indicator, and full directions Net STIEEING EOD, Nafis' Faultless, for use in acidity tests. This rod is hollow and contains a, piece of wool of the exact color which the sample of milk should have when the acidity test is complete Net $ 4.00 3.75 .15 ALKALINE TESTS We recommend the Parrington Alkaline Tablets for use in determining the degree of acidity of milk, cream, or whey. These tests are valuable in selecting milk for pas- teurization, for butter or cheese making; for testing cream during ripening in order to trace the progress of its souring and show whether fermentation should be has- tened or checked so that the cream may be in the right condition for churning at a certain time; and to show whether it is safe to mix two lots of cream. For these tests the three items listed below will be needed. 5001. GEADUATED CYLINDEE, 100 e. c 56 5060L. PIPETTE, 17.6 c. c 15 5066C. ALKALINE TABLETS, Farrington's. Per box of 50 tablets -25 9734. MOISTURE TEST, Ames. The apparatus consists of a jacketed paraflane container made of copper. The outside shell has a rounded bottom to expose as much surface as possible to the heat *'"" "- ni--v--i i.,— . *_ -i — ; --,mple cup fits closely within the inside shell, ,,i .i>., i.- ,. t the heat from the paraffine is transmitted i. i a,ted support stand, special thermometer reai.n-u ....... <. . .v ^,-3^ -l-^---_ „ , alcohol lamp, tongs for lifting the sample cup, and full directions , , Net S-"" CENTEAL SCMlNTlFlC CO., OHlCAGtO, X!. 8. A. 97 19736. RENNET TEST, MaischaU. A simple, reliable and indispensable aid to every cheese maker. It enables the maker to ascertain the condi- tion of the milk, and. to regulate its ripening to an exact point, alike every day, which is very essential in order to insure uniform work and uniform quality of the cheese. Includes Graduated Cup (A), a 1 o.c. Pipette (B), a Bottle (C) in which to dilute the rennet, and a spatula (D) for stirring the milk. Complete in a handsome case Net $ 2.50 No. 9736. Patented U. S. A., Jan. 21, 1896. 9737. SALT TEST FOE BUTTEE, Nafis. This appa- ratus is automatic, easy to manipulate, and self-adjusting, and is especially suited for rapid, determinations of the per cent, of salts in butter. The liquid in the graduated tube instantly readjusts itself to zero so that the only reading to be taken in using the appara- tus is at the point on the graduated scale where the liquid surface is located after the test is completed. With a 10-gram sample of butter each c.c. of solution drawn from the burette will equal l^ per cent, salt in the but- ter. Complete as illustrated together with 10 gram Weight, 250 c.c. Flask, Standard Solu- tion in dry f ornri, 25 o.c. Pipette, Porcelain Cup, Stirring Eod, Medicine Dropper, Beaker, 2-ounce Bottle of Indicator, and full directions... .Net 9737A. STIEEING ROD, Nafis' Faultless, for use in No. 9737 Salt Test. This rod is colored to show the exact tint taken by the sample when the test is complete Net 5.00 .15 No. 9737. 9738. SEDIMENT TESTER for milk, as described by Pro- fessors Babcock and Parrington. Consists of a cyl- inder 2% inches in diameter and 6 inches long, fun- nel shaped at the bottom and terminating in an open- ing about 1 inch in diameter. In the cap at the bot- tom is a wire gauze strainer on which a thin disc of absorbent cotton is placed. After a pint sample of milk has been filtered through the apparatus, the cotton filter, with the dirt which it has collected, is detached and allowed to dry. The amount of dirt obtained will difEer with different lots of milk and the discs when dry may be returned to the milk producer as evidence as to the cleanliness of the milk. The central cylinder is surrounded by a steam or hot water jacket with % inch intervening space so that the milk can be kept hot and the filtering process thereby hastened. Complete with 500 discs and with bracket for mounting against a wall.. Net 9738A. DISCS, Absorbent Cotton, for use with No. 9738 Sedi- ment Tester. Per box of 100 Net 10.00 .35 No. 9738. 9741. 9742. CENTKAL SCTKNTIFIC CO., CHICAGO, V. S. A No. 5064. No. 5064A. 9740. Nos. 9740-9743. TEST-BOTTLE TESTER, Nafis, for use with Babcock Test Bottles. Can be used successfully by anyone. Sub- stantially made of brass. Always ready for use and will test for the two important points of the scale without removing it from the bottle. To make a test it is only necessary, to fill the bottle with alcohol deeply colored with black aniline or writing ink until it is almost opaque (this does away with the menis- cus) so that the highest point is exactly even with the "0" mark. Water, milk or any other liquid may be used with good results, but adhering drops should first be removed from the neck with a strip of blotting-paper. Then slowly lower the Tester into the bottle until the liquiil rises half way between the two sections. At that point should be the middle mark. After that point is tested for and its accuracy established, slowly lower the entire Tester into the bottle so that the liquid rises over the top of the upper section about an eighth of an inch. If the liquid is even with the top mark and was also at the middle mark, the bottle is correct. Tor 6-inch, 10% Milk Test Bottle Net TEST-BOTTLE TESTERS, Nafis. Same as No. 9740, but for 6-inch Cream Test Bot- tles. Order letter A B C Per C3nt - 30 40 50 Price, each Net 1.00 1.50 1.50 TEST-BOTTLE TESTER, Nafis. Same as No. 9740, but for 6-inch, 9-gram, 50% Cream Test Bottles ■. Net Same as No. 9740, but for 9-inch Cream Test Bot- 9743. TEST-BOTTLE TESTERS, Nafis. ties. Order letter A Per cent 30 Price, each Net 1.50 5060V. TEST TUBES, Butter Fat Oil, plain, 9 x % inches. Per dozen 5060 W. TEST TUBES, Butter Fat Oil, with line 5 inches from bottom. Per dozen. 5060Y. TEST TXJBES, Cream, heavy, for samples, 5 x I14 inches. Per dozen B 50 1.50 C 55 1.50 DAIRY THERMOMETERS. 5064. THERMOMETER, Dairy; 8 inches long. Weighted to float upright 5064A. THERMOMETER, Dairy. The easiest reading instrument for dairy use. The combi- nation of a blue spirit column with a white scale and large black figures show up the reading with great distinctness, notwithstanding the obscuring effect of the milk. Eight inches long, will float upright 5064B. THERMOMETER, Dairy, standard, for those who wish a more accurate thermometer than the ordinary. Hand-written paper scale, one degree graduation, accurate with- in one division of the scale, weighted with shot and guaranteed to float upright. Ten inches long. Approximate scale range 10 to 110 degrees Fahrenheit 9753. THERMOMETER, Pasteurizing, with enclosed hand- written paper scale; approximate scale range 30 degrees to 220 degrees Fahrenheit; graduated in 2 degree divisions and accurate within one division of the scale $ 0.73 1.50 1.00 i.oi 55 .3B .80 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 99 ENTOMOLOGY For FuU Line of Entomological Apparatus and Supplies See Catalog N. No. 9760. No. 9762. 9760. BUCKET SPKAYEK for general spraying in the garden, green house, and small orchard. The working parts and cylinder are of brass, so that corrosion and rust are eliminated. The air chamber, which is the globe shaped enlargement seen in the illustration at the top of the cylinder, is of cast brass and causes ease of motion and discharge of a steady stream. The handle and foot rest are made of malleable iron, which is un- breakable, and the latter being 15 inches long, is suitable for use with any tall bucket. Complete with No. '9774 Bordeaux Nozzle and 3 feet of %-inch hose '. $ 4.50 9762. BUCKET SPRAYER, similar to No. 9760, but with the addition of a Hydraulic Agita- tor and of a combination foot rest and bucket clamp by means of which the bucket and pump are held together so that they are as one integral part and may readily be carried from place to place in one hand' By means of the Hydraulic Agitator the spraying mixture is kept thoroughly stirred so that this is the most complete and sat- isfactory bucket sprayer on the market. The pump and air chamber are of brass as described under No. 9760. Complete with No. 9774 Bordeaux Nozzle and 4 feet of %-inch hose, but without bucket 6.65 No. 9765 (in use). ! 9765. KNAPSACK SPRAYER for general spraying purposes The working parts of the pump are the same as described under No. 9760 so that corrosion and rust are eliminated. The lever is of wrought iron with malleable iron link, steel rod and wood handle. The tank is of 5 gallons capacity and is made of brass with wide shoulder straps. It is provided with a drip cup to take care of possible leakage, a gauze strainer un- der the filling hole, and a wide footrest so that it may be used as a bucket pump. Complete with No. 9774 Bordeaux Nozzle and 5 feet of %-inch hose, with discharge pipe and undersprayer 18.00 100 CENTEAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 9770. |,3g3pi^ No. 9770. No. 9770 (in use). TKACTOE. SPRAYEE. This is a spraying outfit of the wheelbarrow type and may read- ily be operated by one man. The tank has a capacity of 12 gallons and the entire sprayer, although built for durability, is as light in weight as is consistent with the proper strength. All parts of the pump coming in contact with the liquid are of brass, thus doing away with corrosion. The pump has a 1%-ineh cylinder with 4-ineh stroke and is provided with an agitator for the spraying liquid. The handles are of wrought iron pipe bent to shape and are connected rigidly by channel iron for holding the tank. The wheel is 20 inches in diameter with tire 2^4 inches wide. As shown in the illustration, the pump is worked by gear wheels, the main gear being attached to the main wheel and the operating gear being so arranged that it may be thrown out of mesh when it is desired to move the sprayer without spraying. This sprayer is espe- cially efficient for spraying two rows of field crops, as shown in the small illustration, and is provided with two sections of %-inch hose 2 feet long, two %-inch stop-cooks, two 14-inch hose pipes 18 inches long, and No. 9776 Demorel Nozzles with angle dis- charge. Complete with galvanized tank of 12 gallons capacity $ 25.00 9770A. TEACTOK SPRAYER, same as No. 9770, but with brass tank. 35.00 9771. 9771. No. 9771 (in use). TANK SPRAYER. This is one of the most convenient outfits for general use. Consists of a 24-gallon wood tank with steel hoops and hinged wood top, mounted on a cart with 24-inch metal wheels having staggered spokes and 2-inch tires; leg, tongue and han- dle of wrought iron pipe; height to top of tank 30 inches; to top of pump 42 inches. The working parts are of brass and since the leverage is six to one, the pump may readily be worked against a pressure of 125 pounds. The air chamber is ample and the agitator, which is of the twin paddle type, is simple and effective and stirs the liquid thoroughly. Complete with No. 9774 Bordeaux Nozzle and 6 feet of %-inch discharge hose 20.00 CENTRAL SCIENTIFIC CO., CHICAGO, TT. S. A. 101 No. 9772 (in use). No. 9772 (-witli detail of base). 9772. BABKEL SPEAYEK. The pump has a brass tube cylinder 2% inches in diameter with 4-inch stroke, brass ball valves, cage and seat. It sits low in the barrel so that the cylinder is submerged. The iron base for mounting the pump on the head of barrel is adjustable and fits a hole 10 x 10 inches. This sprayer is fitted with air chamber, gauze suction strainer, agitator of the twin paddle type, and brass discharge Y, but with- out hose or nozzle (see No. 9772A). For barrel see No. 9773 $ 13.50 9772A. HOSE AND NOZZLE for No. 9772. 12%-foot section of %-ineh sprayer hose with coup- lings and No. 9777 Simplex Nozzle 4.50 9773. No. 9773 (in use). No. 9773. BARREL CART for use with No. 9772 Sprayer. A 50-gallon barrel is mounted on a cart provided with a frame of wrought iron and wood well braced and having 32-ineh metal wheels with tires 21/2 inches wide. By detaching the brace which steadies the barrel and then lifting the handle, the barrel can be set on the ground and the cart removed. Complete as illustrated ■ • For CHART on SPRATENG, see page 189. 16.65 102 f'ENTR.U. SCIENTIFir CO., CHIPAGO, U. S. A. No. 9774. No. 9775. No. 9776. No. 9777. 9774. NOZZLE, Bordeaux. This is an excellent general purpose spray nozzle and throws a solid stream, coarse long-distance spray, or a fine mist, or it may be shut ofl: alto- gether. Suitable for general spraying, whitewashing, disinfecting, etc $1.00 9775. NOZZLE, Vermorel, with caps for fine and coarse sprays, suitable for kerosene spray- 9776. NOZZLE, bemorei, similar to No. 9775 Nozzle, but somewhat lighter in weight .75 9777. NOZZLE, Simplex. Light and durable in construction and adapted for high pressure; has two interchangeable steel spray discs, one coarse and one medium fine .7o No. 9778. No. 9779. No. 9780. No. 9783. No. 9784. 9778. NOZZLE, Simplex Angle, same as No. 9777, but with angle connection 9779. NOZZLE, Spramist. Similar to No. 9777 Nozzle, but with cup-shaped removable strainer 9780. NOZZLE, Eureka, for throwing a conical shape spray. Especially suitable for white- washing 9783. NOZZLE, Acme, for throwing a solid stream or fine spray 9784. NOZZLE, Fire, for fire protection, washing windows, buggies, etc . . . .75 1.25 .75 .50 .50 No. 9790. 9790. HYDROMETER, Lime-Sulphur, for testing the lime-sulphur wash used in spraying. With this Hydrometer the strength of the solution can be accurately known so that the oper- ator may be certain that when it is applied to the tree it is strong enough to destroy the scale. Complete with directions, including instructions for mixing the lime-sulphur wash 9790A. HTYBKOMETER, similar to No. 9790, but of higher grade. Arsenate of Lead, dry Arsenate of Lead, paste Arsenate of Soda, dry Arsenite of Lime, dry Bordeaux Mixture, dry Carbon Bisulphide Cyanide of Potassium (for generating Hydro- cyanic Acid Gas) Hellebore Kerosene Emulsion, per qt '. . Lime, Unslaked (Quicklime), lumps Lime, Unslaked (Quicklime), powd Lime, Slaked London Purple Paris Green Pyrethrum (Persian Insect Powder) Sulphate of Copper, powd Sulphur, powd Sulphur and Lime Mixture Tobacco Stems Whale Oil Soap 45 tier grade . (See ! page 18£ Prices N o .90 ;iDES et. 4 oz. 8 oz. 1 lb. Bulk. $0.18 $0.30 $0.50 5 lb. $2.25 .10 .18 .25 5 lb. 1.10 .12 .22 .35 5 lb. 1.50 .10 .18 .30 5 lb. 1.25 .10 .18 .25 5 lb. 1.00 .33 50 lb. 8.00 .15 .27 .40 5 lb. 1.75 .10 .18 .25 5 lb. 1.00 .40 1 gal. 1.25 , , .15 5 lb. .50 .12 .20 5 lb. .90 .10 5 lb. .40 .25 .15 .25 .40 5 lb. 1.75 .15 .27 .40 5 lb. 1.80 .10 .15 .20 5 lb. .75 .10 5 lb. .30 .12 .20 5 lb. .90 .10 5 lb. .25 .io .15 5 lb. .65 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 103 LIFE HISTORIES OF NORTH AMERICAN INSECTS Mounted dry in "Biker's Specimen Mounts." (See next page for prices of Mounts only.) 8951A. 8951B. 8951C. 8951D. 8951E. 8951F. 8951G. 8951H. 8951J. 8951K. 8951L. 8952A. 8952B. 8952C. 8952D. 8952E. 8952F. 8952G. 89.52^ 8952J. ILLUSTEATING METHOD OF MOUNTING. NOXIOUS INSECTS LEPIDOPTERA. Butterflies and Moths. Prices Net. Pieris rapae, cabbage butterfly $ 2.75 Euvanessa antiopa, mourning cloak 3.00 Carpocapsa pomonella, codling moth 3.50 Laphygma frugiperda, fall army worm ■ 2.50 Leucania unipunctata, army worm 2.50 Ocneria dispar, gypsy moth 3.50 Protoparce Carolina, tomato sphinx ^-00 Protoparce celeus, potato or tobacco sphinx. 4.00 Sannina exitiosa, peach borer 2.75 Heliotliis armigera, boll-worm, corn worm o tomato worm o.OO Enproctis chrysorrhoea, brown tail moth 3.00 COLEOPTBRA. Beetles. Doryphora decemllueata, potato bug |"^^ Anasa tristis, squash bug ^-'^ Macrodactylus subspinosus, rose bug ^"^ Passalus cornutus, horn bug g ' Anthronomus grandis, cotton boll weevU (Mexican) |-"" Saperda Candida, apple borer - ^- ' Conotraclielus nenuphar, plum-eureulio 2°" Diabrotica vlttata, striped cucumber beetle • ^''^ Dennestes lardarlus, larder beetle Continued on next page. 104 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. LIFE HISTORIES— Continued ORTHOFTERA. Grasshoppers, Locusts, Etc. Prices Net. 8953A. Termes fataUs, white ant * 10-50 8953B. Gryllus campestris, field cricket ^-'^ 8953C. Gryllus domestlcus, house cricket ^'^^ 8953D. Gryllotalpa vulgaras, mole cricket 2.75 8953E. Melanoplus spretus, Eocky Mountain locust 2.75 BENEFICIAL INSECTS LEPIDOPTEKA. 89.56. Bombyx mori, silkworm 4.75 COLEOPTERA. 8957A. Necrophorus americana, carrion beetle 3.50 8957B. CoccineUa novempunctata, ladybug 3.50 HYMENOPTERA. 8959. Apis mellifica, honey bee 7.00 MIMICRY REAL MIMICRY. Butterflies that closely resemble in form and color species which birds and insects will not attack on account of the poisonous taste. 8960. Limeuitis dissipus, same color and markings as Danais archippus, which is not mo- lested 2.75 PROTECTIVE COLORATION. IMimicry of Color Only. 8960A. Catocala relicta ("white ribbon"), showing male and female, also one specimen at rest on birch bark 4.00 8960B. Catocala amatrix ("red ribbon"), showing male and female, also one specimen at rest on bark 2.50 Mimicry of Color and Form. 8960C. Kallima inachus (leaf butterfly), mimicking a leaf to perfection in both color and form (from East India) 4.00 8960D. Anisomopha buprestoides (walking-stick), from Florida 1.75 8960E. Phasma gigantes (giant walking-stick), with wings, male and female (from Bast In- dia) ,. 10.00 8960P. Valgus candiculatus and others. Three insects that imitate buds of twigs.... 2.50 WARNING COLORS AND FORM. 8960G. Caligo oilus (owl butterfly), mimicking an owl's head 4.50 8960H. Attacus atlas (cobra-head moth), miinicking a snake's head 4.50 8960K. PaplUo blumei, green banded. East Indian butterfly 3.00 8960L. Morpho cypris, blue butterfly from Brazil, the most gorgeous butterfly in the world 3.00 (Note. — The last two butterflies scare away birds by their loud colors.) SPECIMEN MOUNTS -T-- __. - I I r-^ ^-^ J No. 9781. 9781. SPECIMEN MOUNT, Riker's, suitable for mounting insects, butterflies, fungi shells etc., or thick bulbs or plants too large for the Botanical Mounts, No. 9782'. ' Size, inches SVgxS 4x5 5x6 6%x8i^ 8 x 12 12 x 16 Price Net .12 .15 .19 .23 .40 80 9782. BOTANICAL MOUNT, Riker'S, suitable for mounting any botanical specimen. The mount consists of two parts — a thin plate of photographic glass to which narrow flaps of linen morocco paper are neatly fastened, and a cardboard back to which is glued a thin layer of sterilized surgical cotton in which the specimens are imbedded Size, inches 5x6 6%x8% 8x12 12x16 Price Net .19 .23 .40 80 CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 105 FARM SURVEYING No. 9811. 9811. FARM LEVEL, Bostrom's Improved. Built upon lines radically different from those followed in making other levels; accurate, durable, and complete, and so simple that anyone with ordinary intelligence can quickly learn to do satisfactory work with this instrument. Meets every requirement in all farm work for which a level- is needed, such as Terracing, Ditching, Tile Draining, Irrigating, Road Building, Grad- ing, Leveling Toundations, Running Fences, and Setting Out Orchards. The tele- scope has a clear field and a magnifying power of eight diameters which enables the cross on the target to be read at a distance of one-quarter of a mile in any direction. A circle graduated in degrees is provided for obtaining angles, squaring up buildings, and all such work. Included in the outfit is a sliding target rod, gradu-. ated in feet, inches, and quarter inches, telescoping to five feet when closed and to nine and one-half feet when extended, and having sliding target of usual form with thumb-screw for securing in any position. The metal parts are of iron and brass, and the wood parts, including the target, are of pine. Complete in neat wood box with tripod, sliding target rod, target and plumb bob .Net $ 15.00 106 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. No. 9812. 9812. FARM LEVEL, Bostrom's Improved. Similar to No. 9811, but more substantial and of finer finish. The telescope has a magnifying power of twelve diameters so that the instrument has a much greater range and all wood parts are of hardwood and all metal parts of brass except the target. Complete in neat wood box with tri- pod, sliding target rod, target and plumb bob Net $25.00 9813. 9814. No. 9813. No. 9814. TAPES, Surveyors' Chain. Heavy %-ineh steel tape; nicely finished hardwood reel, with metal folding handle and two large and strong detachable rings. Trimmings nicely nickel plated. Graduated in feet, with end feet in tenths, or in links, with end links in tenths, graduations etched on. Length 100 feet. 200 feet. 300 feet. 100 links. 200 links. 300 links. Each 6.67 10.00 14.00 5.55 7.80 10.00 TAPES, Surveyors' Chain, graduated on Babbitt Metal. This Tape will answer the requirements of the most severe usage and take the place of the old-time steel chain. It is made of practically unbreakable steel, heavily coated with white metal to pre- vent rusting and corrosion, and somewhat heavier than the ordinary chain tape. The graduations are stamped into Babbitt Metal at each foot (end feet in tenths), or at each link (end links in tenths), so that the graduations can readily be felt as the tape is allowed to pass through the hand. Bach Tape is provided with a pair of detachable handles, and the reel, which is built especially for such Tapes, has a nickel-plated frame with folding winding handles and is a very serviceable reel, easily wound and of beautiful finish. Length 100 feet. 200 feet. 300 feet. 100 links. 200 links. 300 links. Each 6.67 10.40 12.70 5.85 9.20 10.40 CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 107 No. 9816. 9816. TAPES, Steel Measuring. Metal lined hard leather case, nickel -plated trimmings, folding winding handle opened by pressing pin on opposite side. Tape % inch wide and marked in feet, tenths, and hundredths. Measurements guaranteed accu- rate. Length, feet 50 100 Each -. $4.00 6.75 9817. TAPES, MetalUc_ Measuring. Hard leather eases, folding handles, nickel-plated trim- mings, tape % inch wide, made of best woven linen with metallic warp, marked on one side in tenths of feet and on the other side in links. Length, feet 50 100 Each 2.60 4.20 ^/nAUi7vCcunje4>uA/ Note. — The above Measuring Tapes (Nos. 9816 apd 9817) are provided with a new marking by means of which instantaneous readings of both feet and inches can be made without the necessity of referring back to the last entire foot. The method is well shown in the accompanying illustration. 9820. 9460. No. 9460. No. 9820. SUEVEYOR'S AKROWS made of 9/64 inch round steel fourteen inches long, and with rings enameled in bright vermilion. Per set of eleven HYPSOMBTBR for measuring heights of trees, buildings, etc. Consists of sight tube and balance circle Clinometer. Complete in a leather case with table and mstruc- 7. J! „„ Duty Free tions for use ^ $ 1.10 10.50 For other SURVEYING INSTRUMENTS see pages 74-5. Ids CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. FARM METEOROLOGY No. 9831. No. 9834. 9831. AUTOMATIC ALARM THEKMOMETER. A sensitive, aeouiate, durable instrument for giving an alarm the instant the temperature registers a given degree. Consists of a straight mercury tube, into the bore of wnioh a fine platinum wire is fused at 32° F., or at any other degree desired. Through a non-sparking Relay At- tachment a bell is made to ring, at practically any distance from the thermometer itself, at the exact moment the temperature where the instrument is located reaches the danger point. Simply but strongly constructed and fully protected by a heavy metal weather-proof case, which, however, allows perfect circulation of air at all times. It may be installed by any one of average intelligence, and under ordi- nary conditions should render valuable and accurate service for a lifetime. May be installed in three different ways: (1) One thermometer and simple alarm; (2) More than one thermometer and simple alarm; (3) More than one thermometer and annunciator alarm showing exact location of danger point. In ordering, be sure to mention the temperature at which alarm is to be given. Thermometer, with relay, but without batteries, bell, or wire $ 20.00 9832. AUTOMATIC ALARM THERMOMETER. Similar to No. 9831, but arranged to ring at either of. two temperatures desired, which must be mentioned when ordering. Thermometer, with relay, but without batteries, bell, or wire ; . . 27.00 9834. FROST PREDICTOR, Cunynghame's. This predictor does away with the necessity of carefully consulting two thermometer tube and computing their readings from tables, of working over a printed chart, or of operating some mechanical device. It there- fore saves time and overcomes all possible chance of error due to careless ther- mometer readings or miscalculations. Consists of two thermometers mounted side by side on a non-corrosive scale of zinc. One bulb is exposed to the air temperature and the other has a wick attached which dips into a metal cup filled with water. When the level of the mercury in the right-hand thermometer falls below the level in the left-hand thermometer (a fact which may be determined by simple inspec- tion and which cannot take more than a few seconds to observe) a frost may be expected. When the readings are taken after sundown, the prediction is usually verified about five hours after the observation. Complete as described 7.5C CENTRAL SCIENTIFIC CO., CHICAGO, IT. 8. A. 1( © °'"""o"„",;'""'' © WETS DFl TEMPERATURES ORY — i WET ® 5 6 ® " ' -,52 • • 120-p - _ i-rl20 — s - 50 = I10-; ^ '= iin - 48 i loo-i 1 , - 46 i ; 100 90-1 J ■44 i ■1-90 80-1 III - 42 1 ■ 1 -80 70-| 1 11 -40 1 1-70 60- 1 III --3S 1 1-60 50-1 II -■36 1 1-50 r T II ■34 = - — ■to-l f II = -40 — = r MBB -1-32 = r 30-!= ) 1 = ^30 ^aS" s No. 9835. 9835. HOETICUIiTUBAI. HYGEOMBTEB. An instrument for ascertaining in a simple manner the likelihood of a frost during the night, based on the principle that in the evening "the dew point determines the minimum temperature of the night," and if this dew point be below freezing point, it is only fair to presume that there will be a frost during the night. . Shows in a simple manner, without the use of tables, whether the dew point is below freezing, and consequently, whether frost may be expected. The instrument is a wet and dry bulb Hygrometer, with a special cylindrical scale revolving between the thermometers. The cylinder is figured in three sections, which are intended to apply as follows: (1) White Section, Frost highly improbable. (2) Shaded Section, Frost dojibtful. (3) Black Section, Frost very probable. The cylinder has 10 lines numbered 1, 2, 3, 4, up to 10; these represent the difEerence of degrees between the readings of the Wet and Dry Thermometers. The method of observing is as follows: Note first the Dry Bulb reading, then the Wet Bulb reading, and the difEerence between the two. Turn the cylinder (by means of the handle) until the line and figure representing this difference is at the right-hand side of the opening. Look down the scale on the right-hand side of the opening, and the Wet Bulb reading (just observed) will fall opposite one of the -three sections. From this the observer knows whether frost is likely to occur dur- ing the night. The instrument consists of a steel plate and steel cylinder on which the divisions, fig- ures and letters are permanently enameled. This gives legibility, darability, clean- liness. The tubes -of the thermometers are at the back of the scale, and thus well protected, whilst the wire covering guards the bulbs. The whole is mounted on a solid iron frame cast in one piece, with lugs for attaching to wall Duty Free For other METEOEOLOGICAL INSTSX7MENTS, see Catalog M. 9900. AGEICULTXIB-AL CH.AKTS, see page 189. $ 7.00 110 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. MICROSCOPE SLIDES OF TYPICAL PLANTS AND THEIR PATHOLOGICAL CONDITIONS The slides listod below are prepared under the direction of an expert in plant pathol- ogy at one of the prominent Agricultural Colleges. They will prove of special value in the study of certain typical plants, and in enabling the student to learn to iden- tify many of the more common plant diseases. 1. Wheat Starch Granules, fresh and eroded. 2. Cross Section of Bean Leaf, Phaseolus vul- garis. 3. Bean Koot Tubercles, Pseudomonas radicioola. 4. Cross Section of Carnation, Dianthus caryo- phyllinus. 5. Cross Section of Mushroom, Coprinus mica- ceus. 6. Yellow Water Lily, Nymphaea advena. 7. Clover Dodder, Cuseuta trifolii. 8. Apple Bitter Bot, Glomerella rufomaeulans. 9. Apple Black Eot, Sphaeropsis malorum. 10. Apple Scab, Venturia pomi. 11. Blackberry Clinker, Nectria cinnabarina. 12. Blackberry Leaf Spot, Septoria rubi. 13. Cherry Shot-Hole, Cylindrosporium padi. 14. Currant Leaf Spot, Septoria ribis; 15. Currant Kust, Puecinia ribis. 16. Grape Anthracnose, Gloeosporium ampelo- phagum. 17. Grape Black Eot, Guignardia bidwellii. 18. Grape Downy Mildew, Ehysotheca viticola. 19. Grape Powdery Mildew, Uncinula neeator. 20. Peach Brown Eot, Selerotinia fruetigena. 21. Peach Leaf Curl, Exoascus deformans. 22. Peach Scab, Cladosporium carpophilum. 23. Pear Leaf Spot, Septoria pyricola. 24. Pear Scab, Venturia pyrina. 25. Plum Black Knot, Plowrightia morbosa. 26. Plum Pockets, Exoascus pruni. 27. Easpberry Anthracnose, Gloeosporium vene- tum. 9951. SET OF SLIDES. 9951A. SINGLE SLIDES. 28. Easpberry Cane Blight, Leptosphaeria oonio- thyrium. 29. Easpberry Eust, Gyranoconia peckiana. 30. Carnation Eust, Uromyces caryophyllinus. 31. Chestnut Bark Disease, Diaporthe parasitica. 32. Maple Tar Spot, Ehytisma acerinum. 33. Timber Destroying Fungus, Trametes pini. 34. Eose Mildew, Sphaerotheca pannosa. 35. Eose Eust, Phragmidium subcortieium. 36. Asparagus Eust, Puecinia asparagi. 37. Bean Anthracnose, CoUetotriehum lindemuth- ianum. 38. Cabbage Club Eoot, Plasmodiophora brasai- cae. 39. Cucumber Anthracnose, CoUetotriehum lage- narium. 40. Tomato Leaf Spot, Septoria lycopersioi. 41. Corn Eust, Puecinia zeae. 42. Corn Smut, Ustilago maydis. 43. Cotton Anthracnose, CoUetotriehum gossypii. 44. Oat Smut, Ustilago avenae. 45. Wheat Bunt, or Stinking Smut, Tilletia foe- tans. 46. AWlieat Eust, Puecinia gvaminis, Aeeidial Stage; occurs on Barberry. The spores from thia stage infect the Wheat, pro- ducing the Telial Stage (Slide No. 47). 47. Wheat Eust, Puecinia graminis, Telial Stage. (See Slide No. 46.) 48. Eye Ergot, Claviceps purpurea. 49. Pore Fungus, Boletus versipellus. 50. White Eust of Crucifers, Albugo Candida. 25 or more chosen from the above list. Per slide Each Net Net $ 0.30 .35 For PLANT DISEASE SPECIMENS see page 186. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. Ill LANTERN SLIDES FOR AGRICULTURE WAGER AND BOWLIN'S The following list of slides is from the work of Prof. Ralph E. Wager, head of the Biological Science Department of the Northern Illinois Normal School, and Wm. R. Bowlin, of the Englewood High School, Chicago. These slides are accurate, scientific records, expertly made. All slides are from large original negatives, unless otherwise stated. Scientists in too many cases are careless or inexpert in photographic processes, hut in this case complete mastery of photographic technique is combined with careful, scientific observation, and the result is a long list of modern views of surpassing excellence. PRICES Plain slides, each Net $0.40 Colored slides, each Net .75 Plain slides will be sent unless otherwise specified. FARM STOCK Photographs of Pedigreed Animals True to Their Type CLYDESDALE •636-19 Mare and Foal, both well pedigreed. G36-18 Horse, two years old — side view. 636-21 Horse, three years old — side view. *636- 5 Horse, four years old — side view. 636- 6 Same Horse — rear view. •636- 7 Horse, four years old, dappled coat — side view. The dapple was the original Clydesdale type. 636- 8 Same Horse showing rear view — well-shaped legs. 636- 9 Front View of same Horse. 636-10 Front Legs and Feet of Clydesdale — side view. Excel- lent conformation. PERCHERON 636-11 Hors", two and one-half years old— side view— very good ' type. 636-12 Same Horse — ^rear view. •636-24 Horse, four years old — three-quarter view. HORSES TROTTING HORSE *636-22 Horse, four years old — side view. Extraordinary animal Son of Tom Miller. ENGLISH HACKNEY •636-26 Side View. SUFFOLK PUNCH •636-27 Side View. BELGIAN *636-28 Mare — side view. SHETLAND •036-29 Pony — side view. '636-30 Pony hitched to cart. JACK *636-31 nigh-bred Tj-pe. CATTLE GUERNSEY •636- 3 Registered BuU— side view. •636-32 Fine Type of Guernsey Cow— side view. •636-33 Same — rear view, showing the udder. 636-34 Three-ouarter View of same Cow. •636-35 View of Hear Third of Body, showing udder and milk veins. •636-36 Calf, full blood— side view. 636-37 Front View of Cow. JERSEY •636-33 Begistered Bull— side view. 636-39 Keglstered Cow— side view. 036-40 Bear View of same cow. 630-41 Front View of same cow. 036-42 Three-quarter View of cow. 030-43 Hear Third of Body. •636-44 Jersey Cow and Calf. 037-45 Three-quarter Jersey (Grade) type. •638-40 Same Cow with Calf, sired by full blood Jersey. AYRSHIRE •036-47 Ayrshire Bull— side view. ♦636-90 Ayrshire Cow — side view. HOLSTEIN-FRIESIAN •036-48 Keglstered BuU— side view. •636-49 Registered Cow— side view. 636-50 Same Cow— rear view. 636-51 Three-quarter View, from rear. •630-52 Bear Third of Body, showing udder. 630-53 Yearling Heifer— side view. 036-54 Two-year Heifer— side view. Cow, showing effect of •030-55 •630-50 036-57 637-68 •037-59 •636-00 630-61 •636-02 030-63 030-64 •036-65 636-60 630-67 •036-68 036-09 036-70 BROWN SWISS Herd of Brown Swiss Cattle. Cow and Calf. Registered Cow — tliree-quarter view, from rear. Registered Cow — side view. Registered Bull— side view. SHORTHORN Begistered Bull— side view. Segistered Bull among herd of grade cows and calves. Shortliorn Cow — side, view. Same — front view. Same — rear view. HEREFORD Hereford Bull — side view. Same — front view. Same — rear view. Hereford Cow — side view. Same — front view. Same — rear view. ABERDEEN ANGUS •636-71 Bull— side view. •636-72 Cow— side view. POLLED DURHAM •030-73 Polled Durham Bull — side view. •036-74 Polled Durham Cow— side view. DUAL PURPOSE •636-25 Highly Bred Cow— side view, the best herd in existence. Calf beside her. From i;l2 CENTRAL SCIENTIFIC CO., CHlCAOO, V. S. A. LANTERN SLIDES— Continued FARM STOCK Continued SHEEP AMERICAN It •636-75 Fine Type of l!am. •636-76 Flock of Sheep In pasture. •636-77 Young Ram. DELAINE MERINO Well developed wool type. •636-78 •636-79 •636-80 RAMBOUILLET Herd of RamboulUeta in pasture. Bam. Excellent type. Ewe, characteristic type. SOUTHDOWN SHROPSHIRE •636-81 Southdown Ewe. POLAND CHINA •636-83 Male. Good conflguration. "636-84 Sow and Pigs. 636-13 Large Poland China Sow. Fair type. Type ram. SWINE CHESTER A Group in Pasture. Sow — close view. DUROC-JERSEY Excellent Type of Sow. BERKSHIRE Fine type of boar. Group of sows. Extra fine. •636-86 •636-88 * Slides marked with an asterisk, 50 in number, constitute a set admirably adapted for elementary work in type studies. FARM PROCESSES ALFALFA 631-31 631-32 631-33 631-34 631-61 631-3S 631-36 631-37 631-38 631-39 631-40 631-41 631-42 633- 3 631-23 631-24 631-25 631-26 631-27 631-28 631-54 631-55 633- 8 633- 9 5831-15 5835-14 5837- 1 5838- 2 5832-16 5832-28 5832-38 5832-18 5831- 9 5839- 1 5839- 2 5839- 7 5839- 9 5839-11 5839-12 5839-13 5839-16 5839-17 5839-26 5839-31 5839-32 5839-33 Unloading Limestone from car. Limestone piled ready for spreading. Loading Limestone into manure-spreader. Spreading Limestone on field by means of the manure- spreader. Seeding Alfalfa. Cutting Alfalfa: rear of outfit. Cutting Alfalfa: front of outfit; 30-acre field. Raking Alfalfa with side-delivery rake; rear view. View of Side-delivery Rake in operation. Loading Alfalfa with loader. Outfit in operation. View of Outfit from the side. Hoisting Alfalfa from load into barn — silo beside barn. Curing Alfalfa in cocks covered with canvas caps. Field of Alfalfa: along one margin is a strip uninocu- lated, showing the effect of the absence of bacteria. OATS Discing Corn Stubble. Two four-mule teams In large field. One of the Outfits In operation. Rear view. Seeding Oats, rear view. Seeder in operation. Filling the Seeder with oats. Discing after Seeding. Bear view of outfit. Harrowing after Seeding. Harrow often follows disc. Harvesting Oats. Threshing Oats. Field of Oats infected with curley dock (Rumex criapus). Field of Oats infected with mustard {Brasslca arvensis). CORN 631- 9 Discing for Corn. Two four-mule teams. 631-10 Dragging (harrowing) the ground after discing. 631-11 Planting with check-row planter. 631-14 Check-row Planter, from rear; shows wire and markei. 631-15 Check-row Planter, in operation, from in front. Shown wire, marker, position of team with reference to oadi. planted and unplanted areas, etc. 631-16 Planter at close range, Shows wire, trip, etc. 631-18 Changing the Wire at the edge of the field. 631-19 Old Between-row Cultivator, in operation, side view. 631-12 Two-row (Tower) Plow, in operation, rear view. First plowing, corn 6-8 In, high. 631-13 Second Plowing, two-row plow, three horses, taken from rear. Corn 12-18 in. high. 631-17 Cutting Corn by hand, 631-46 Husking Corn in the field. Using wagon and team. 631-47 Shelling Corn with corn sheller. 631-48 Corn Crib, filled with corn, 631-49 Shredding Com for ensilage. 631-50 Filling the Silo with ensilage. 631-52 Shredded Corn in stack. New method of keeping It. 631-53 Cattle in field of com, fattening. CLOVER 631-56 Field of Clover. Very heavy — red and white. 631-57 Closer View of red and white clover plants. 631-58 Cutting Clover with machine. 631-59 Raking Clover with horse rake. 631-60 Loading Clover with loader. RYE 632-11 Heads of Rye affected with ergot, purea. ) (Claviciceps pur- WEEDS FOUND IN FARM CROPS Black Bind Weed. (Perslcaria convolvulus.) Violet Wood Sorrel. (Oxalis violacea.) Plants In grass. Water Hemlock. (Clrcuta maculata.) English Plantain. (Plantago lanceolata.) Wild Garlic. (Allium canadense.) Star Grass. (Hypoxia hirsuta.) Lamb's Quarter. (Chenopodium album.) In corn. Pig Weed. (Amaranthus retroflexus.) Squirrel Tail Grass, (Hordlum jubatum.) White Daisy. (Chrysanthemum leucanthemum. ) Black-eyed Susan. (RudbecMa hlrta.) Habitat, Common Chickory. (Clchorium intybus.) Bosin Weed (Silphlum IntegrifoUum) and Cone-Flower (lepachys pinnata) In group, Bosin Weed or Compass Plant (Silphlum laclniatum.) Dog Fennel. (Anthemis cotula.) Prickly Lettuce. (Lactuca scariola.) Daisy Fleabane (Erlgeron ramosus) In clover. Dog Fennel, (Anthemis cotula.) Habitat. Yarrow. (Achillea mlllef oliiun. ) Habitat. Burdock. (Arctium minus.) Canada Thistle. (CIrsium arvensium.) Ragweed. (Ambrosia artemisifolia. ) For Prices 5S39-34 5837-10 5838- 9 5838-19 580- 3 580- 4 580- 5 633- 8 633- 9 633- 7 5831-11 5831-12 5831-13 5831-14 5831-17 5831-16 See Page Great Ragweed, (Ambrosia trifida.) Milkweed. (Ascleplus pumila. ) Habitat. Jimson Weed (Datura tatula) in corn. Common Plantain, (Plantago major.) Tarrow. Burdock, Canada Thistle and Squirrel Tail In typical waste-place group. Lamb's Quarter, Pigweed and Ragweed In the edge of corn. Jimson Weed, Lamb's Quarter, Pigweed and Velvet Leaf (Arbutllon theophrasti) in com. Oats Infected with Curly Dock. (Rumex criapus.) Oats Infected with Mustard. (Brassica arvensis.) White Sweet Clover (Mellllotus alba) In group with bur- dock and yellow dock. Velvet Leaf. (Arbutllon theophrasti.) Yellow Sweet Clover (MellUotus offlcinialls) in field of clover. Couch Grass. (Agropyrom repens.) Tumble Weed. (Amaranthus graecizans.) Sheep Sorrel. (Rumex acetocella.) Bind Weed. (Convolvulus seplum.) Plant and Fruit of the Cocklebur, growing along railroad track suggesting a method of seed carrying. Common Purslane. (Portulaca oleracae. ) 111 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 113 LANTERN SLIDES— Continued ECONOMIC INSECTS 832- 2 C32- 3 632- 4 632- 5 632- 6 632- 7 632- S 632- 9 632-10 632-16 632-17 632-lS 632- ffl 632-13 632-11 632-15 632-19 632-20 632- 1 Work of Corn Bill-bug. (Horizontal rows of punctures in leaf.) Work of Corn Ear-worm. Larva shown in the ear. Life History of Com Ear-worm. From State Bulletin. Stages in life of Com Root Aphis. With atteudant Amt. From SUte Bulletin. Stages in life of June Beetle. (Larva, White Gmb.) From State Bulletin. Stages in life of Clhinch Bug. From State Bulletin. Lateral aspect of Differential Locust. (Coloptenus dif- ferentiaL ) Dorsal aspect of Differential Locust. Work of Codling Moth. Diagrammatic. Grasshopper oi' rose leaf. The Cottony Scale killing a branch of silver maple. Bow of Silver Maples ruined by cottony scale. Washing a Maple Tree with kerosene and soap to kiU cottony scal& Oab Apple Branch infected with San Jose scale. San Jose scale much magnified. Life History of the Cabbage Butterfly (Pieris rapae) copied. Life History of the Colorado Potato Beetle. (Leptino- tarsa decenlineata. ) Copied. The 12-point Asparagus Beetle on asparagus. The Onion Maggot (Pegomya cepetorum) destroying bulb. 632-21 Spraying by means of gasoline power spray with solu- tion of calcium sulphid. 59578- 1 Larvae of Cecropia Moth (Samia cecropia) one day old. 59578- 2 Larvae of Cecropia Moth (Samia cecropia) after first moult. 59578-2a Larvae of Cecropia Moth (Samia cecropia) after second moult. 59578- 3 Larvae of Cecropia Moth (Samia cecropia) after third moult. 59578- 4 Larvae of Cecropia Moth (Samia cecropia) after fourth moult. 5 Larva moulting (fourth.) 6 .Cocoon of Cecropia on Japanese auince. (Large form of cocoon.) 59578- 7 (Cocoon of Cecropia on hawthorn in bloom, showing small form of cocoon. 59578- 8 Cocoon of Cecropia cut open to show pupa and larval skin. 59578- 9 Cecropia Moth, wings spread, dorsal aspect. On Japa- nese Quince, in bloom. 59578-10 Cecropia Moth, wings closed, lateral aspect. On Japa- nese Quince. 59578-11 Two Swallowtail Butterflies on geranium and orchid blossom. 59578-12 Larvae of Polyphemus (Telia polyphemus) one day old. 59578-13 Larvae of Polyphemus (Telia polyphemus) adult, on basswood, two cocoons showing. 59578- 59578- 59578-13a Adult of Polyphemus — wings spread, female. 59578-14 Tomato Sphynx Larva well covered with larval cocoons of Ichneumon parasites. 59578-15 Three Larvae of Interrogation Butterfly (Grapta interro- gationis) on elm. One larva suspended ready to moult into chrysalis. 59578-16 Three Chrysalids of Interrogation Butterfly on ehn twigs. 59572- 1 Angular Winged Eaty-did (Microcentrum laurifolium) among leaves of honeysuckle. Somewhat dorsal view. 59572- 2 Angular Winged Katy-did. as above, lateral view. Ex- cellent for protective resemblance. 59575- 1 Milkweed Bugs (Oneopeltus faciatus) on fruits of Milk- weed. Both nymphs and adults shown. 59575- 2 Similar to above. Different view. 59575- 3 Similar to above. Different view. 59572- 3 Differential Locust (Melanoplus differentialis) on barberry leaf. Dorsal aspect. 59572- 4 Same Locust, lateral a^ect. 59572- 5 Differential Locust on bare twig. Lateral aspect. 59572- 6 Grasshopper (Orchelimum, male) on rose leaf. 59578-17 Com Ear-worm, on ear. 59578-18 Larvae of Monarch Butterfly (Anosia plexippus) on Milk- weed. 59578-19 Larva of Monarch spinning pad of silk on which to pupate. 59578-20 Larva of Monarch spinning pad of silk. Different view from above. 59578-21 Larva of Monarch attached to pad of silk, about to moult. 59578-22 Chrysalis of Monarch, immediately after moulting into the pupal stage. Larval skin still aiLacheJ. Lateral aspect. 59578-23 Chrysalis, lateral aspect. Suspended on Milkweed leaf. 59578-24 Chrysalis, ventral aspect. Suspended on Milkweed leaf. 59578-25 (Chrysalis of Monarch, about to be ruptured by adult, the colors of which show through the clirysalidal case. 59578-26 Adult Monarch, on Blossoms of Sweet William. 59576- 1 Hickory Borer on Golden Rod. 59572- 7 Carolina Locust (Disosteira Carolina) on ground. Pro- tectively colored. 59572- 8 Carolina Locust on ground, nearer view than above. 59572- 9 Carolina Locust on Aiborvitae. Detail excellent. 59575- 4 Woolly Aphids on twig of Hawthorn. 59578-27 Larva of Mourning Cloak Butterfly (Vanessa antiopa) on Willow twig, 59578-28 Larva as above, different view. 59578-29 CnirysaUs of Mourning Cloak, on Willow twig. 59578-30 Adult Mourning Cloak on Milkweed leaf. Wings closed, lateral aspect. 59578-31 Adult Mourning Cloak, wings open on blossom of Milk- HORTICULTURE Made for the most nart in the fiwll country of Idaho. 634-22 Apple Tree just set. 634- 1 Delicious Apple Tree, one year from setting, head forming. 634-23 View of Orchard, second summer frpm setting, peach tree fillers. 631- 3 Jonathan Apple Tree, third summer, exceUent head. 634- 4 Home Beauty Apple Tree, third summer from setting. 634- 5 Newtown Pippin, third summer from setting. 634- 2 View of WeU CultiTated Orchard, third summer from set- ting. 634- 7 Jonathan Tree, fourth summer from settmg. 634- "8 Newton Pippin, fourth summer from setting. 634- 6 Tlew of WeU Cultivated, Irrigated Orchard, fourth summer from setting. Shows growth oyer 634-2. 634-10 Jonathan Tree, fifth summer from setting. 634-24 View of Orchard, fifth summer from setting. 634-25 Jonathan Apple in bloom, fifth spring from setting. Per- fect head. Shows method of pruning. 634-26 Newtown Pippin in bloom. Fifth spring from setting. Ex- cellent type. 634-27 Mature Apple Tree in bloom. 634-28 Mature Plum Tree in bloom. 634-29 Elberta Peach Tree, second summer from setting. 634-30 Peach Tree, after pruning, third spring from setting. 634-11 Early Harvest Tree heavily laden with fruit, fifth summer. 634-12 Gano Apple Tree, fruit laden, sixth summer. 634-13 Bartlett Pear Tree, heavily laden. 634-14 Peach Tree, heavily fruited. 634-15 Peach Branch, heavily fruited. 634-16 Close View of a Branch of Bed Raspberry, large fruit, per- fect type. 634-17 View of the Mountainous Kegion of Idaho, forest covered 634-18 View of a Group of Large Pines In such forest. 634-19 View of Small Elver in Mountainous Region, used fo Irrigation. 634-20 Deflecting Portion of Stream into Irrigating Ditch. 634-21 View of Irrigating Ditch along Mountain Side, ditch 1: miles long. For Prices See Page 111 114 CENTRAL SCIENTIFIC CO., CHICAGO, tJ. S. A. LANTERN SLIDES— Continued HORTICULTURE CARE OF TREES 634-31 Tree Badly Decayed at base. 634-32 Same Tree, cavity prepared for filling. C34-33 Same Tree, LUed with cement, cut parts painted. 634-34 Smoothing and Calking a Wound made by wind i 634-35 View showing proper method of cutting a limb break and tear. 634-36 Properly Pruned Young Shade Trees. 634-37 The Result of Improper Pruning. 634-38 Methods of Tree Moving. BUDDING AND GRAFTING 634-39 Method of Budding. 634-40 Methods of Budding. 634-41 Methods of Budding. 634-42 Methods of Grafting. 634-43 Methods of Grafting. 634-44 Methods of Grafting. Continued 5S16- 1 Bark 5S16- 2 Bark 5816- 3 Bark ,mt =816- 4 Bark "="' 5816- 5 Bark 6815- 6 Bark 5816- 7 Bark 5816- 8 Bark 5816- 9 Bark 5816-10 Bark 5816-11 Bark 5816- 12 Bark 5816- 13 Bark 6816- 14 Bark 5816-15 Bark 5816- 16 Bark 6816-17 Bark 5816-18 Bark 5816-19 Bark 6816- 20 Bark BARK OF TREES Types for Identification Instruction of Hickory, shell or shag baik. (Carya alba), of Hackberry (Celtls occidentalls). of White Ash (Fraxinus araerk-ana). of Blach Walnut (Juglans nigra), of Ironwood {Ostrya vlrginlana). of Scarlet Oak (Quercus coccinea). of Slippery Elm (Ulmus fulva). of White or American Elm (Ulmus anierlcana). of White Oak (Quercus alba), of Black Cherry (Prunus serotlna). of Pepperldge (Nyssa sylvatlca). of Basswood (Tilia americana) . of Poplar, immature, of Poplar, mature, of White Birch (Betula papyiifera). of White Pine (Pinus strobus). of Norway Pine (Pinus resinosa). of Silver Maple (Acer saccharinum). of Sugar Maple (Acer saccharum). of Willow (Saliz Digra). BIRDS Designed particularly to be used in connection with the study prepared by R. E. WAGER, Professor of Biology, Northern Illinois ored slides, each, $1.00, net. CATBIRD 5986- 1 Catbird on Nest, brooding eggs. 5986- 6 Parent Bird on edge of nest with food in beak. 5986- 8 Three Nestlings the day they left the nest. 5986-46 Diagram showing Food of Catbird. 5987-30 Nest of Catbird. Four eggs. BRONZED CRACKLE 5985-15 Parent Bird on nest. 5985-18 Parent Bird feeding young. 5987-18 Nest of Crackle. Five eggs. 5985-72 Diagram showing Food of the Grackle. BLUE JAY 5985-21 Adult Bird on nest. 5985-22 Four Young Birds on branch. Day after leaving nest. 59S7- 5 Nest of Blue Jay. Four eggs and one nesting. 5985-73 Diagram showing Food of Blue Jay. MEADOW LARK 5985-26 Bird near nest with food in beak. Food largely made up of caterpillars. 5985-28 Adult near nest with large locust in beak. 5985-37 Adult feeding Young. 5985-41 Four Young Larks just outside of nest. 5987-17 Nest of Meadow Lark. Five eggs. 5987-14 Diagram showing Food of the Bird. SONG SPARROW 5985- 5 Female at Nest. Young birds show. 5985- 9 Male at Nest. Canker worm in beak, 5985-12 Both Parent Birds at Nest. 5985-14 Two Nestlings at time of leaving the nest. 5987- 3 Nest of Song Sparrow. Five eggs. 5985-71 Diagram showing Food of the Bird. CHIPPING SPARROW 5985- 1 Adult on Nest. 5985-75 Adult Feeding Young. 5985-76 Young Bird after leaving nest. 5987- 1 Nest of Chipping Sparrow. In pine tree. BROWN THRESHER 5986- 9 Parent Bird on Nest. 5986-12 Parent Bird on Nest. Wings spread to protect young from sunlight. 5986-14 Parent Bird removing excrement from young. 5986-19 Three Young Threshers as tliey left the nr-Jt. 5986-47 Diagram showing Food eaten by Brown Thresher. 5987-10 Nest of Brown Thresher. Five eggs. ROBIN 5986-23 Robin on Nest in pine tree. 5986-25 Robin Removing Excrement from young bird in nest 5986-26 Nestlings, necks upstretched, nest in pine tree. 5986-29 Young Robin two days after leaving nest. 5986-48 Diagram showing Food consumed by Robin. 5987-13 Nest of Robin. Four eggs. of the economic relations of the birds. Photographs made and set State Normal School, PRICE: Plain slides, each $0.50. net. Col- TRAILL FLYCATCHER 5985-52 Bird at Edge of Nest. Young cowblrd in nest. 5985-55 Side View of Adult Bird. Young cowbird with nccU upstretched. 5985-58 Adult Feeding Nestling Cowbird. YELLOW WARBLER 5986-30 YeUow Warbler in Nest in Nlnebark. 5080-34 Yellow Warbler on Edge of Nest. 5986-36 Two Young Birds on branch. 5987- 8 Nest of Yellow Warbler. Four Warbler and one Cowblrd'a RED-WINGED BLACKBIRD 5985-44 Female at Nest with food in beak. 5985-44 Female Feeding Young. 5085-49 Two Young as they left the nest. 5985-70 Diagram showing Food consumed by Redwing. 5987-11 Nest of Redwing in mustard. Four eggs. ROSE-BREASTED GROSBEAK 5985-61 Male on Branch. Front view of biid. 5985-68 Male over nest, Young with necdis upstretched. 5985-69 Male Feeding Young. 5987-29 Nest of Grosbeak, Three eggs, and one Cowbird's egg. 5985-77 Diagram showing Food of Grosbeak. FLICKER 5984-10 Flicker at Hole, dorsal aspect of bird. 5984-11 Male Flicker at hole, side view. 5984-12 Male Flicker just coming out of hole. 5984-13 Female Bird, side view. 5984-14 Flicker Removing Excrement from hole. 5984-17 Diagram showing Food of the Birds. RED-HEADED WOODPECKER 59S4-15 Red-head with head partly in hole in telegraph pole. 5984-16 Red-head just emerging from hole. BROWN CREEPER 5986-45 Brown Creeper on side of tree. Side view. BLUEBIRD 5986-40 Bluebird just Entering Ilole in telegraph pole. 5986-41 Female at Hole with food in beak. 5986-42 Male bird at Hole. 5986-43 One of the Birds just emerging from hole. RED-TAILED HAWK 5984- 3 Head and Upper Body of Adult Bird. From life. MOURNING DOVE 5984-47 Adult Bird at nest in which is one young. CROW 5985-60 Well-grown Young Bird on stump. 5985-78 Diagram of Food of Crow. For Prices See Page 111 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 115 9985. LANTERN SLIDES FOR AGRICULTURE IMPORTED Orders cannot be accepted for less than 50 slides chosen from the following sets, Nos. 9985-9999, Elementary Botany. Copied from Pictures by permission of Messrs. Longmans & Company Each, Net, Duty, free $ 0.28 THE ROOT 1. Varied Forms Assumed by Eoot. 2. Its Endogenous Nature; its Cap and Hairs. 3. Development in a Mono- and a Dicotyledon. 4-5. Transverse sections of Eauunculus acris, showing the centri- petal formation of wood. THE STEM 6. Subterranean and Prone Forms. 7. Diagram of Dicotyledon. S. Diagram of Monocotyledon. 9. Transverse Section of Dicotyledon. 10. Longitudinal Section of Dicotyledon. 11. Transverse Section of Monocotyledon. 12. Transverse Section of Dracaena, showing fnrmation of new vascnilar bundles from extra fascicular cambium THE LEAVES 13. Simple entire > 14. Simple divided i: Types of Leaves. 15. Compound J 16. Particular Forms of Leaf. 17. Arrangement of Leaves on Stem. 18. Transverse Section through Stomata into Intercellular Spaces. 19. Aestivation. 20. Vernation. THE FLOWER 21. Perfect. Pistillate, Staminate, and Neuter Flowers. 22. The Floral Diagram. 23. The Calyx, various forms of. 24. The Corolla, various forms of. 25. The Stamen, various ITprms of. 26. The Pollen, various forms of. 27. The Pistil, various forms of. THE INFLORESCENCE 28. Definite. 29. Indefinite. SUBSIDIARY ORGANS 30. Hairs, unicellular — multicellular. 31. Spines, prickles, phyllodes, phylloclades. THE FRUIT 32. Indeliiscent, and Diagram to Illustrate Dehiscent. 33. Dehiscent. 34. Development of Arillus of Yew. THE SEED 35. Position of Ovule in Ovary and Embryo in Endosperm. 3P. Comparison of Mono- and Dicotyledon. 37. Fertilisation of an Angiosperm. 38. Fertilisation of a Gymnosperm. THE CELL AND VESSEL 39. Variety in Shape. 40-41. Thickening of Walls. 42. Special Marking on Cell Walls. 43. Its contents (A) Chlorophyll; circulation, rotation, occur- rence in bands. 44. Its contents (E) Starch, Aleurone, in situ. 45. Its contents (C) Crystals. 46. Conjugation, Multiplication, and Free Cell Formation. 47. Sieve Tubes, Utricular _and Laticifierous Vessels. 48. Cells, with contents of varying density. THE TISSUES 49. Parenchyma, Prosenchyma, and Collenchyma, 50. Eesin Passage. 9985A. Same as No. 9985, but colored 9986. Agricultural Botany. Direct Photo -Micrographs. ROOTS 1. Growing Tip of Root of Barley, long. sect. 2. Trans. Sect. Koot of Maize, showing root hairs. 3. Trans. Sect. Root of Maize, showing branching. 4. Trans. Sect. Root, Enlarging Turnip. 5. Trans. Sect. Stem of Host, showing sucker roots of Dodder (Cuscuta trifolia). STEMS 6. Trans. Sect. Stem of Oat. 7. Trans. Sect. Stem of Bean. 8. Long. Sect. Stem of Bean. 9. Long. Sect. Bud of Lime Tree. LEAVES 10. Vert. Sect, Leaf of Bean. 11. Vert. Sect. Leaf of Oat. 12. Vert. Sect. Leaf of Cabbage, white. .Each, Net, Duty free .Each, Net, Duty free FLOWERS 13. Trans. Sect, of an Anther. 14. Trans. Sect, of an Ovary of Potato. 1.25 .28 FRUITS AND SEEDS Vert. Sect, of a Grain of Oat, showing embryo and endosperm. Trans. Sect, of Cotyledon of Pea. Embryo of Oat, Trans. Sect. Seed of .Sweet Vernal Grass. GENERAL STRUCTURE Long. Sect. Stem Lettuce, to show milk tubes. Sect. Stem Vegetable Marrow, to show sieve plates. Epidermis of leaf of grass, to show stomata. Stinging Hairs of Nettles. Section of Potato, cells containing starch and rorU cells of rind. PUCCINIA GRAMINIS IN STAGES Rust on Stem of Wheat. Mildew on Stem of Wheat. Barberry (Aecidium berberides). Club Root in Turnips, showing enlargement of cells. Ergot of Eye. Claviceps purpuria. Smut of Wheat, ^Ustilago segetum. Potato Disease, Fungus on Leaf, Peronospora infestans. 9987. The Life of the Wheat Plant from Seed to Seed. Photographed by special permission from a series of diagrams published by the Royal Agricultural Society of England Each, Net, Duty free .38 1. The Structure of the Grain, I. 6 diagrams. 2. The Structure of the Grain, II, 2 diagrams. 3. Germination of the Grain, I. 6 diagrams. 4. Germination of the Grain, II. 4 diagrams. 5. The Toung Plant, I. 5 diagrams. 6. The Toung Plant, II. 4 diagrams. 7. Early Growth of the Ear, I. 5 diagrams. 8. Early Growth of the Ear, II, 4 diagrams, 9. Growth of the Ear and Flower, I. 4 diagrams. 10. Growth of the Ear and Flower, II. 3 diagrams. 11. Growth of the Ear and Flower, III. 6 diagrams. 12. The Flower, L 6 diagrams. 13. The Flower, 11. 10 diagrams. 14. Ripening of the Grain, I. 8 diagrams. 15. Ripening of the Grain, II, 7 diagrams, 16. The WTieat Straw, I. 2 diagrams, 17. The Wheat Straw, IL 5 diagrams. 99S8. The Life History of Wheat. Direct Photo-Mxrographs Each, Net, Duty free 8, Wheat Plant Starch, Isolated, ■* 9. Smut in Grain of Wheat, Ustilago segetum, 10. Mildew on Stem of Wheat, Puccinia graminis, 11. Spores of Bunt Fungus in Corn, Uredo foetida. 12. Wheat Stem Fly. 13. Eel Blight from Wheat, Vibrio tritici. 14. Meal Mites, Tyroglyphus farinoe. .28 Wheat Plant Stem, Trans, Section, stained. Wheat, Long. Section of one-half, stained. Wheat Root, Trans. .Section, stained. Wheat Leaf, Trans. Section, stained. Wheat, Sillcious Cuticle, Section, stained. Wheat Fruit, Long. Section of Embryo, stainerl. Wheat Plant Fruit, Trans. Section of Endosperm, stained. For Prices See Page 111 116 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. LANTERN SLIDES— Continued D'.iSO. Illustrations from the Results of the Rothamsted Experiments. Published under the authority of the Lawe's Agricultural Trust Each, Net, Duty free $ 0.28 Tables ot results of experiments on the Browth of Root- cs. Table showlnB the Home Produce. Iinport,C™sumptio^ crops for mans years in succession on the same land: Price, of Wheat in the United Kingdom-40 Harvest- 1. White Turnips, and Swedish Turnips, commencing 1843. ^"^'l' }^^^J,i° f i J'l", w ,H^.n,» 1 "^..^jir Tippt ', war.! 1871-5 =!>• I^'st of the Rothamsted Field Experiments. 3: Se. wLercommencing 1876. 30. Plan of the Plots in Barnfleld on which the Experiment, i. Table ot results of Experiments on the growth of Barley for ""1 J'""'"'^™''? have been made. many years In succMsion on the same land, commencing 31- Plan ot the Plots in Hoosfleld, on which Experiments have 2g52 been made: Tables' of results ot experiments on the growth of various '" O" f^'^^'^- "°"?,™'°^i!f^- ,=„„ ,04, Leguminous Crops, each for many years in succession on 2 On Leguminous Crops, commencing 1849 the same land, commencing 1847: 3 On AI ernate Wheat and Fallow, commencing 1851. •i Prndiire nf Bean? tier acre ner annum «' On Potatoes, commencing 1876. I: Nmogent^he Produce ot Beans p"r acre per annum. 32. Plan of the Plots in Broadballt Field, on which Wheat has 7. Produce of Bed Clover (as Hay), on ordinary arable land. ^^""JTT """^ succession, commenc- 8. Produce of Ked Clover {Hay and Constituents), on rich gar- ^"^ 1S43-4. . „ . den soil '^3- ^^^" °^ '■'^^ Plots m Agdell Field, on which Experiments 9. Table of results of Experiments on the Growth of Wheat for on Four-Course Eotation have been made, commencing many years in succession on the same land, commencing „ „ ,.„,,. ^, .„ , ' ,.. , -r. • i , ,ojo A 34. Plan of the Plots in the Park, on which Expermients have Tables' of results of Experiments on Eotation of Crops; 45 ^^^en made on the Mixed Herbage of Permanent Grass- years commencing 1S4S: „/^»^' commencing 1856 - , ^ ^ ^ ^ ,„ « ^, , m , , ,n -i')- Photographs and Plans of the Rothamsted Laboratory. 10. Swedish Turnirs. produce per acre; 12 courses. 3g photographs and Plan of the Eothamsted Sample House. 1. Barley, produce per acre; 11 courses 3^ ^^^^^^^ Drawing and Description of the Eothamsted Eain 12. Clover or Beans, produce per acre; 11 courses. 13. Wheat, produce per acre; 11 courses. 35 p^j^^^^ Drawing and Description ot the Kothamsted Drain 14. Average produce, and yield of Nitrogen per acre per annum; „„„„„„ _ gauges, s courses. 3g Table showing the Kalntall at Eothamsted, measured in a 15. PhotOBraphs of Boots (Swedish Turnips), grown in Rotation ^^^^^ one-thousandth ot an acre in area-40 Harvest- Without Manure, with Mineral Manure, and with Mmeral vears 1852-3 to 1891-2 and Nitrogenous Manure. 40 Table showing the Kainfkll; also the amount of Percolation Photographs of various Leguminous Plants, grown in Experi- through Drain-gauges, containing respectively, 20 inches, ments on the Fixation of Free Nitrogen: 40 j^^^^es, and 60 inches, depths of Unmanured. and 16. Peas, Vetches, and Yellow Lupins; grown in pots. uncropped Soil and Subsoil, in natural state of consolida- 17. Peas, grown in pots. tion— 22 Harvest- years, 1870-1 to 1S91-2. 18. Sainfoin; grown in pots. 41. Table showing the loss of Nitrogen (as Nitrates), respec- 19. Table of results relating to Nos. 17 and 18. tively through 20 inches, 40 inches, and 60 inches depth Tables of results of Experiments on the Growth of Potatoes of Soil and Subsoil, also the loss of Nitrogen calculated for many years in succession on the same land, commenc- as Nitrate of Soda — 15 Harvest- years, 1877-8 to 1891-2. ing 1876: 42. Table showing the amounts of Nitrogen supplied in Manure, 21. Manures, and Produce per acre (Sound and Diseased). and estimated to be recovered in Increase of Crop, lost in 22. Specific Gravity, and Percentage Composition of Sound Drainage, accumulated as Crop-residue in the surface- Tubers, soil, and not so accounted for. in the case of differently Tables of results of Experiments on the Mixed Herbage of matured Wheat plots — averages per acre per annum for 30 Permanent Grass for many years in succession on the Harvest-years, 1851-2 to 1880-1. same land, commencing 1856: 43. Table illustrating the loss of Nitrogen as Nitrate, in a wet 23. Manupfs, and Produce (as Hay), per acre per annum. autumn and winter, in the drainage from the differently 24. Botanical Composition of the Herbage. manured Wheat plots in Broadbalk-fleld ; also tlie loss 25. Summary of the Botanical Composition, per" cent., per acre, calculated as Nitrate of Soda; Season 1891-2, 49Lh year etc. of the Wheat experiments. 26. Summary of the Cliemical Composition of the Produce, per 44. Colored Diagrams illustrating the results of Experiments on acre. the Feeding of Animals; showing the proportion of Nitro- 27. Table of results of Experiments on Wheat grown in altprna- genous, of Non- nitrogenous, and of Total Organic Sub- tion with Fallow, and Wheat grown year after yi^M- con- stance consumed: — I. Per 100 lb. Live-weight per week, tinuously, without Manure — 42 years, 1850-1 to lb'Jl-2. II. To Produce 100 lb. Increase in Live-Weight, 9989A. Same as No. 9989, but colored Each, Net, Duty free 1.40 9991. Fruit Tree Cultivation , Each, Net, Duty free .35 1. Grafting; Stock, Graft, Graft cut. Graft inserted in Stock. 13. Horizontal Trained Pear Tree 2. Budding; Stock, Bud cut for inserting. Bud inserted. Bud i4_ jran Trained Plum tied in. .^ „ ^ 15. Upright Trained Apple, 5 Branches. 3. Pruning a Pyramid Pear Tree. 16. Pyramid Apple Trees in Fruit in Pots. 4. Maiden Cherry, 1 year old. 17_ Standard Apple. 3 years old. 5. Maiden Plum, 2 years old. 18 standard Pear, 3 years old. 6. Maiden Pear Tree. 19 standard Plum, 3 years old. 7. Pyramid Pear. 20. Peach Trees, one year, pruned; and two years after pruning. 8. Pyramid Pear in Fruit in Pot. , ^ , , 21. Pyramid Peach Grown in Pot, 20 years old. with 120 9. Pyramid Pears "Conference" and Pitmaster Duchess." Peaches on it 10. Bush Pear in Fruit. 22. Half Standard Peach. 11. Goblet-shaped Pear Tree in Pmit. 23. Bush Peach in Fruit 12. Diagonal Trained Pear in Fruit. 9991A. Same as No. 9991, but colored 9993. Nitrifying Organisms in Soils. Photo-Micrographs. .Each, Net, Duty free .Each, Net, Duty free 1. Nitrous organism in soil from Zurich (Zoogloea stage) V 1,000. 2. Nitrous organism in soil from Zurich (Zoogloea stage) V 1,000. 3. Nitrous organism in soil from Zurich (mobile stage) X 1.000. 4. Nitrous organism in soil from Java X 1.000. 5. Nitrous organism in soil from Java (mobile stage) x 1.000. 1.35 .28 Nitrous organism in soil from Kazan, Russia, x 1.000- Nitrous organism in soil from Gennevilliers (grown on jelly) Nitrous organism in soil from Quito, Coccus, x 1.000. Nitric organism in soil from Quito X 1.000, Nitric organism in soil from St. Petersburg. Nitric organism in soil from Bonn. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 117 LANTERN SLIDES— Continued 9994. Effects of Manures. Made from a series of photographs of actual specimens grown with various manures, and mostly contain from four to eight samples on each slide. Each, Net, Duty free - $ 0.28 Wheat. Experiment with and without Nitrogenoua Manures. Barley. Experiment with and without Nitrogenous Manures. Peas. Experiment with and without Nitrogenous Manures. Oats. Experiment with and without Nitrogenous Manures. Oats. Experiments with Green Manures. Peas and Oats. Experimaits with and without Potash, Phos- phoric Acid, and Nitrogen, for comparison. Vetches. Experiments with and without Potash, Phosphoric Acid, and Nitrogen. Peas and Wheat. Yield of Experiments with and without Viu-ious Manures. Summer Kye. Experiments with and without Superphosphate, in autumn and spring. Summer Bye. Experiments with and without Phosphate Powder, in autumn and spring. Barley. Experiments with and without Superphosphate and Phosphate Powder. Barley. Yield of experiments shown in Slide No. 11. Barley. Manurial Experiments on Loamy Soil: (1) Without Phosphoric Acid; (2) with Phosphoric Acid as Superphosphate; (3) with Phosphoric Acid as finely pul- verized Thomas' Phosphate. Buckwheat and Peas. Experiments with Phosphoric Acid and Potash. Oats. Green Manuring Experiments. Oats. Yield of experiments with and without Green Manures. Oats. Illustrating the Influence of Phosphatic Manuring on the Utilization of Nitrate Nitrogen. Oats, Experiments with and without Phosphoric Acid in difl'erent forms. Experiments with and without Superphosphate. Crop of Oats. Yield of experiments with various manures on (1) Caay Soil; (2) Soil rich in Humus. Crop of Oats and Barley. Yield of experiments with and without Phosphoric Acid on Clay Soil. Vetches and Wheat. Yield of experiments with and without Potash, Phosphoric Acid, and Nitrogen. Wheat, Experiments with (1) No manure (2) Potash and Phosphoric Acid; (3) Potash, Phosphoric Acid and Nitro- gen. Maize. Manurial Experiments with Phosphoric Acid, Pot- ash, and in addition. Nitrogen as Nitrate of Soda. Hemp. Manurial Experiments as in No. 24. Tobacco. Manurial Experiments with Nitrogen and Super- phosphate, and Nitrogen and Phosphate of Potash. Beetroot, Manurial Experiments as in No. 24. Carrots. Manurial Experiments as in No. 24. Carrots, as above, showing roots. Field Beans. Manurial Experiments as in No. 24. Peas. Manurial Experiments as in No. 24. Potatoes. Manurial Experiments as in No. 24. Clover. Experiments with and without Phosphoric Acid in form of Superphosphate and Thomas* Phosphate Powder. Fuchsias. Manurial Experiments la Hot-bed Soil. Geraniums, Manurial Experiments in Eot-hed Soil, 9994A. Same as No. 9994, but colored Each, Net, Duty free 1.35 9996. The Embryology of a Chicken. A unique Series of Lantern Slides from direct Nega- tives by Mr. W. M. Martin, of Redruth, comprising the complete history of the develop- ment of the germ from the time the egg is laid to the hatching of the chicken. Each, Net, Duty free .43 1. A Fresh Laid Egg, 2. A Fresh Laid Egg showing air space at broad end. 3. A Fresh Laid Egg carefully opened, showing circular germ which develops into the chicken. 4. Fresh Laid Egg opened and yolk turned upside down to show the twisted ends of membrane which' keep the germ upper- most. 5. Appearance of Germ after 12 hours' incubation, concentric circles appearing. 6. Germ after 24 hours' incubation. 7. Appearance after two days. 8. Appearance on Srd day, 9. Appearance on 4th day. 10. Showing effect of raising the temperature of incubator from 103 degrees (normal) to 120 degrees for 10 hours on 4th day. 11. 5th day. 12. A portion of No. 11 enlarged. 13. Embryo on 5th day dissected from the. yolk. 14. Appearance on removing portion of shell on 5th day. 15. Embryo of No. 14 removed from shell and slightly magnified, showing rudimentary limbs. 16. 6th day. 17. Embryo of No, 16 dissected from the yolk and magnified. 18. 7th day. 19. Embryo of No. 18 removed from shell. 20. No. 19 enlarged. 21. Empty Shell on 7th day. 22. 8th day. 23. 9th day. 24. Entire Contents of Shell removed on 9th day, 25. 9th day — removed from shell, showing first formation of beak. 26. Showing the eflfect of temperature of 120 degrees on 9th day for several hours, 27. 10th day, 28. 11th day — ^portion of covering membrane removed. 29. 11th day— shell opened near broad end of egg, and cover- ing membrane removed. 30. 11th day — removed from shell and covering membrane, show- ing growth of limbs and beak. 31. 11th day — contents of shell removed, yolk perforated and contents withdrawn. 32. 11th day— removed from shell and slightly enlarged, show- ing growth of beak and body. 70. 11th day — contents of shell removed and chicken placed in position to show two well-formed curves in main artery. 11th day — showing well-expanded air space. 12th day — showing appearance of membrane and blood ves- sels. 12th day — covering membrane removed. 12th day — removed from shell. 12th day — entire contents of shell removed, showing white of egg being absorbed by yolk. 13th day — appearance of covering membrane, 13th day — with membrane removed. 14th day — appearance on removing shell. 14th day — removed from shell. 15th day — appearance of covering membrane. 15th day — covering membrane removed. 15th day — removed from shell. 16th day — ^membrane removed. 16th day — opened from opposite side of shell. 16th day — entire contents of shell removed. 17th day — portion of membrane removed, 17th day— membrane removed. 17th day — entire contents of shell removed. 17th day — showing chicken with swollen neck, head In wrong position, and dead. Showing No. 52 from other side, with yolk removed. 17th day — removed from shell. 18th day — showing head of chicken almost in position for hatching. 19th day^showing chicken in correct position for hatching. 19th day — removed from shell. 19th day — showing large amount of yolk still unabsorbed. No. 58 removed from shell in its natural position. 20th day — removed from shell. 20th day — showing still unabsorbed yolk. 20th day — shell opened opposite side from No. 61. 21st day — shell carefully peeled off. Showing position assumed by No. 63 on cutting the binding cords. 21st day— removed from shell. End of air space opened on 21st day. Coming through the shell. Five hours later. A snap shot one hour later. Chicken twelve hours after hatching. 118 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. LANTERN SLIDES— Continued 9998. Veterinary Science. .Each, Net, Duty free $ 0.3f VETERINARY ANATOMY 1. Skeleton of Horse. 2. Skeleton of Cow. 3. Skeleton of Sheep. 4. Skeleton of Dog. 5. Skeleton of Pig. 6. Lateral View of Horse's Skull. 7. Hight Fore-foot of Horse. S, Left Hind-foot of Horse, External Aspect, 9. External Muscles of Eight Anterior Limb of Horse. 10. Larynx of Horse. 11. Bronchial Tubes of Horse. 12. Kidneys of Ox. 13. Heart and Principal Vessels of Horse; Left Face. 14. Heart and Principal Vessels of Horse; Right Face. 15. Stomach of Horse, le. Stomach of Ox. 17. Intestines of Horse, General View. 18. Roots of Jugular Vein in Horse. 19. Median and Vertical Section of Horse's Brain. 20. Nerves of Digit. BACTERIOLOGY 21. Healthy Blood. Red and White Corpuscles. 22. Involution Form of Bacillus anthracis (Agar Cultivation). 23. Spore-formation of Bacillus anthracis (Potato Culture). 24. Bacillus of Tetanus (Culture). 25. Tuberculosis (Intestinal Ulcers in a Tubercular Cnw). 26 TubercuIo.sis. (Lungs of Rabbit inoculated with Milk from a Tubercular Cow). 27. Actinomyces. 28. Actinomycosis ("Lumpy Jaw"). 29. A Specimen of the Glanders Bacillus. PARASITES 30. Spiropters and Larvae of Oestrus in Stomach of Horse. 01. Larvae and Pupa of Gastrophilus equi. 32. Male and Female of Gastrophilus equi. 33. Taenia perfoliata of Horse; Cephalic extremity of Taenia perfoliata. 34. Taenia mamillana; Cephalic extremity of same. Taciiii< plicata of Horse. 35. Taenia expansa of Ox; Cephalic extremity. S6. Taenia marginata of Dog, and Hooks of same. 37. Taenia coenurus of Dog, and Hooks of same. 38. Taenia echinococcus and Hooks of same. 39. Ascaris lumbricoides; Lateral View and Ventral Surface, Male and Female. 40. Oxyuris cur^oila of Horse, Male and Female. 41. Fragments of the Coecuni of Horse, showing Tumors due to Sclerostones and Parasites. 42. Cephalic Extremity of Strongylus contortus of Sheep. Caudal Extremity of the Male Phagostoma venulosum. 43. Trichina spirales of Pig. 63. 64. 65. 66. 67. 68. 69. EXTERNAL PARASITES OR ECTOZOA Haematopinus macrocephalus of Horse (Female). Haematopinus eurysternus of Ox (Female). Haematopinus tenuirostris of Ox (Female). Trichodectes scalaris of Ox (Female). Trichodcctes sphoerocephalus of Sheep (Female). agus of Sheep. Ixodes rlcinus of Dog. Psoroptes Communis equi, Male. The Mange Acarus of Sheep. Dog, afTcijted with advanced Demodecic Scabies. OBSTETRICS Vertebro- sacral Position of Foetus (Cow). Meloph- Fore limb crossed over the neck. One fore limb completely retained. Fore limbs bent at the knees. Both fore limbs completely retained. Extreme downward deviation of the Lateral deviation of the head towards Lateral deviation of the head towards Deviation of the head upwards and Anterior Presentation: Anterior Presentation Anterior Presentation Anterior Presentation Anterior Presentation head. Anterior Presentation: the shoulder. Anterior I'resentation: the abdomen. Anterior Presentation: backwards. Lumbo-sacral Position. Hock Presentation : Hock corded. Thigh and Croup Presentation. Sterno- abdominal Presentation, Head Retained: Calf. Baron's Obstetric Machine. VETERINARY SURGERY Post Travis, Casting — Rope applied. English Method of throwing down a horse with hobbles. Operating Table: Vertical Position, (1) Alsace Nose-ring and Head-stall. (2) Alsace Nose-ring applied. (3) Vignau's Controlling Apparatus for Oxen. Securing hind leg by means of tail; Ox Travis. ( 1 ) Single Pin Suture ; ( 2> Quilled Suture ; ( 3 ) DossiWd Suture; (4) Zigzag Suture. Horse in Slings. (1) Apparatus for Fractured Scapula. (2) Apparatus Applied to the Shoulder. (3) Iron Splint for Fracture of Bones of the Fore Limb. (4) Iron Splint Applied. The Various Arrangements of Cautery Lines. (1) Inside of Hock with Cunean Tendon exposed. (2) Same raised for division. 9999. Diseases and Parasites of Cattle Each, Net, Duty free .28 Warbles in Ox, Hypoderma bovis, female. Larva from tumor. Genital Apparatus, Eggs, etc. Bot in the Horse, Gastrophilus equi. Eots attached to stomach, eggs on hairs, and adult fly. Mange in the Horse, Psoroptes cummunis equi, Male, Mange in the Horse, Male and Female. Mange in the Dog, Demodex folliculorum. Itch in Man, Sarcoptes scabei, Male and Female. Scab in Sheep, Psoroptes longirostris var. ovis. Lice of Pig. Lice of Horse. Lice (sucking) of Ox, Hoeraatopinus eurysternus. Lire (biting). Trichodectes scalaris, with allied form from Magpie [or comparison. Tick from Sheepj Ixodes rlcinus. 13. 14. 15. Tick from Dog, Ixodes rlcinus. Tick or Ked from Sheep, Melophagus ovinous. Brain of Sheep ^vith Polycephalous Hydatid of Taenia caenurus. Tape Worm of Dog, Taenia marginata, in Bladder Cyst from and Tape Worm of Dog, Taenia marginata. Trichina spiralis, a piece of infested flesh. Liver Fluke of Sheep, Distomura haepaticum. The Snail the Fluke inhabits, Limnaea truncatula embryo of D. haepaticum. Autumn Breeze Fly. Tabanus bovis, magnified head and mouth organs. Common Symbiot, Symbiotes communis, found on Horae, Ox, Goat, Sheep, and Rabbit. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 11£ GENERAL APPARATUS AND SUPPLIES ARRANGED ALPHABETICALLY FOR CHEMICAL APPARATUS AND GLASSWARE NOT FOUND IN THIS LIST SEE CATALOG M IN WfflCH OUR COMPLETE LINE OF SUCH SUPPLIES IS LISTED FOR CHEMICALS SEE CATALOG R No. 4205, Nos. 4201-3. 4201. 4203. 4205. APEON, for laboratory use; protects the clothes from dirt and acid. Heavy-weight rub- ber, -with drill cloth backing; width, 36 inches; length, 50 inches APEON, light weight, with muslin cloth backing; width, 36 inches; length, 50 inches. . jj_ B. If the above aprons are too long they can easily be cut off to the required length. OVBE-SLEEVES, rubber acid-proof cloth. Per pair $ 0.80 .67 .■10 120 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 3802. 3802. BALANCE, Sartorius' Analytical, New Model, "America," especially designed for American educational institutions. The compensating hangers are made in one piece, which prevents their falling apart, and being suspended on three points, they allow for uneven balancing. Short beam of magnalium metal, rider arrangement, agate knife edges and planes, nickel plated pans, mounted on black glass plate, provided with lev- eling screws. Length of beam, 14 centimeters; capacity, 200 grams; sensibility with full load, .1 milligram Duty Free $ 38.50 3802A. BALANCE, Sartorius' "America," furnished from stock. 3802K:-Q. balances, see page 191. 55.50 For fuU line of General Apparatus and Supplies see Catalog M, CENTRAL SCIENTIFIC CO., CHICAGO, TJ. S. A. 121 No. 3804. 3804. BALANCE, Chemical, open beam, agate knife edges and planes, arrests for the hang- ers, beam support, plumb bob and leveling screws, hangers fitted with double hooks for speGifie gravity experiments. Mounted in mahogany case with glass sides and top and fitted with sliding front and drawer. Length of beam, 21 centimeters; diam- eter of pans, 8 centimeters; capacity, 100 grams; sensibility, 2 milligrams. . .Duty Free $ 22.50 3804A. BALANCE, Chemical, same as No. 3804, furnished from stock 33.35 No. 3806. 3806 BALANCE, Chemical, same as No. 3804, mounted on polished mahogany board, fitted Duty Free 11.00 with leveling screws •' 3806A. BALANCE, Chemical, same as No. 3806, furnished from stock W.OO For full line of General Apparatus and Supplies see Catalog M, 122 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 3808. 3808. BALANCE, "Cenco" Precision, made entirely of Magnalium, to resiat all laboratory fumes. Light and durable, with adjustable beam support, plummet, leveling screws and agate knife edges and planes. Mounted on Magnalium board. Capacity, grams 100 250 Sensitive to, milligrams 3 5 Furnished from stock $15.00 17.50 3808 A. BALANCE, "Cenco" Precision, same as No. 3808. Duty Free 10.00' 11.00 No. 3808B. 3808B. BALANCE, "Cenco" Precision, same as No. 3808, but with arrest for hangers. Capacity, grams 100 Sensitive to, milligrams 1 Duty Free 11.00 For full line of General Apparatus and Sup plies see Catalog M. 250 2" 12.50 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 123 3816. 3818. No. 3816. BAliAlTCE, Iiaboratory, more sensitive and convenient than the Harvard Trip Scale. Capacity, 2 kilos. Sensi'bility, 0.05 grams or less. Beam, open construction. No small weights. A rider indicates all amounts up to 10 grams by 1/10 gram divisions. Damping Device, positive in action, brings balance quickly to rest. Bearings, high grade steel prisms, carefully polished and adjusted. Hangers of new design, eliminating friction and wear. Leveling Screws are supplied, insuring greater sensitiveness. Plumb Bob, not shown in illustration, makes accurate leveling a simple matter. Adjusting Screw protected within open work of beam. Dimensions. Length of beam between knife edges, 32 cm.; graduated part, 25.4 cm. Pans, 14 cm. in diameter. Height of balance, 45 cm. ' An Adjustable Shelf for specific gravity work included $ 12.75 BAI.ANCE, Laboratory, similar to No. 3816, but more sensitive and of better finish and construction. Mounted on polished mahogany finish base provided with level- ing screws. An eccentric movement operated by knurled head raises beam from beam arrest. Provided with counterpoise. Made of brass finely finished. Plumb bob and protected adjusting screw as in No. 3816. . Height of balance, 48 em.; diameter of pans, 14 cm.; length of beam (between knife edges), 32 cm. . , . • Capacity 2,000 grams. Sensibility with full load 30 milligrams or less, whxch is in- creased with smaller loads 22.00 For full Une of General Apparatus and Supplies see Catalog M. 124 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 3822. 3822. BALANCE, "Cenco" Triple Beam, for physical and chemical laboratories. The three beams are placed in the same horizontal plane, thus conforming to scientific principles involved, which is not true of other styles of triple beam balances. Weighings are obtained by movement of the riders along the beams. These riders are easily handled and quickly placed in the notches, but cannot be removed from the beams. An adjust- able support is provided for a jar or other receptacle for experiments in specific grav- ity. Provided with stable base neatly japanned, and with sensitive spirit level and leveling screws. Balance neatly finished in nickel plate and japan. Capacity of mid- dle beam, 100 grams by 10 gram divisions; back beam, 10 grams by 1 gram divisions; front beam, 100 centigrams by 1 centigram divisions. Total capacity, 111 grams; sen- sibility, with or without full load, guaranteed to 1 centigram. Actual tests, however, give a sensibility of from 4 to 8 milligrams. Features easily recognized are: Eapid weighing, constant sensibility, accuracy, freedom from loss of weights, no interference or breaking of weights $ 14.00 3822A. EXTRA WEIGHT, for use with No. 3822, for weighing over 111 grams, but not to exceed 201 grams. Weight is placed on the 100 gram notch of the middle beam. Sold only at the same time with No. 3822 1.65 No. 3827. 3827. BALANCE, Solution or Soil, provided with two weighing beams and sliding poises. One beam is divided into one hundred parts, each part representing one gram; the other beam is divided into ten parts, each part representing one hundred grams. A bar with sliding poise is placed under the weighing beams for the purpose of balancing the empty bottle or container, which is quickly done by sliding the poise along the bar until a correct balance is secured. This balance will be found indispensable in soil study where quantities up to 20 kilos need to be weighed with accuracy Net For full line of General Apparatus and Supplies see Catalog M. 25.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 125 No. 3826. No. 3826A. 3826. BALANCE, Torsion. A laboratory scale of the most useful type. No knife edges, but built on the torsion principle. This scale is used extensively for analysis in soil labor- atories and has been designed according to suggestions of the United States Depart- ment of Agriculture. High poise indicator and arrest. Slide beam reading to 10 grams by 1/lOth gram divisions. Porcelain plates 6 inches in diameter. Height, 12% inches; depth, 6% in.; length, 15 in. over all. Capacity, 1 kilo. Sensibility, 7 centigrams. Net $ 18.00 3826A. BALANCE, Torsion, in glass case, with German silver corner posts and nickel-plated base. Slide beam inside glass case reading to 100 grams by 1 gram, and controlled from outside. Nickel-plated brass pans 9 inches in diameter. Height, 10 inches; depth, 914 in.; length, 20% in. over all. Capacity, 4.5 kilos. Sensibility, Yb gram. Net 35.00 3826AA. BALANCE, Torsion, similar to No. 3826A Balance, but much more sensitive, having high poise, and therefore especially recommended for laboratory use. Slide beam in- side glass case reading to 100 grams by 1 gram divisions. Nickel-plated brass pans, 8 inches in diameter. Height, 12 inches; depth, 8 inches; length, 19% inches over all. Capacity, 4.5 kilos. Sensibility, 1/15 gram .Net 40.00 No. 3826B. No. 3826BB. 3826B. BALANCE, Torsion Cream Test, sensitive to 1 centigram; has sliding tare poise to counterbalance bottles, special bottle holders, high index and arrest. For four bottles. Height, 8 inches; depth, 5% inches; length, 10% inches over all. With 9 and 18 gram weights Net 3826BB. BALANCE, Torsion Cream Test, same as No. 3826B, but for one bottle. The one bot- tle size gives more accurate results than are possible when several bottles are weighed at once. With 9 and 18 gram weights ' Net 3828. BALANCE, Cream Test, for use in connection with Bab- cock Test. Especially designed for very accurate weigh- ing of cream. Metal parts galvanized to make them rust- proof, porcelain plates and agate bearings. The bar in front of the balance is used for balancing bottle and is provided with the necessary weight. This scale is com- pact, being but 10% inches long and being of careful con- No. 3828. struction is accurate Net For full line of General Apparatus and Supplies see Catalog M. 16.00 14.00 10.00 126 CENTEAl, SCIENTIFIC CO., CHICAGO, V. S. A. No. 382SA. No. 9663. 3828A. BALANCE, Cream Test. This scale is designed to weigh 12 bottles at one time. On both sides of the scale there is a bottle rack holding six bottles each. The scale has a beam on the front divided into 12 parts, each part representing 9 grams; the divi- sions marked with whole numbers each representing 18 grams. Back of this beam is a tare beam with sliding brass weight, to balance bottles as placed in the rack; this does away entirely with the use of weights. The scale has agate bearing's and is en- tirely galvanized to make it rust proof Net $ 12.00 9663. CEEAM BALANCE, Wisconsin Hydrostatic. This balance has been devised to meet the demand for a simple and correct method of weighing cream into test bottles and consists of a specially devised brass float, which is placed in a cylinder of water. Very accurate weighings can be made with this in- strument and as there are no bearings to rust it will retain its sensitiveness indefinitely. Complete with metal cylinder, float, and 9-gram weight, but without bottle Net 3885. BALANCE, Decimal Milk. This Spring Scale is intended espe- cially for use in connection with the Babcock Test for keep- ing records of the quantity of milk from individual cows, to- gether with the per cent, fat, so as to calculate the butter yield. The scale is provided with a loose pointer, which, by means of a thumb-screw, may be set anywhere on the dial to offset the weight of the milk pail so this does not have to be deducted from the reading. The reading being in pounds and decimals of pounds makes the calculation very much simpler than when pounds and ounces are given as on the ordinary scale. (Decimal divisions not shown in the illustration.) Capacity, 30 pounds, weighing by 1/20 pounds. Each 3886. BALANCE, Decimal Milk. Same as No. 3885, but capacity 60 pounds, weighing by 1/10 pounds. Each 3888. CHARTS, Milk Record, for one week's record of 15 cows, with spaces for both morning and afternoon production, in pounds and tenths. Per hundred. $ 3.50 4.00 5.00 1.00 Ct3 ,^ CHATILLON'S ,^ IMPROVEDCmCULAR SPRING BALANCE TO WEIGH 301b BY OUNCES Tor full line of General Apparatus and Supplies see Catalog M. No. 3885. CENTRAL SQIENTTIFIO CO., omCAGO, tJ. 8. A. 123 No. 3826C. No. 3826D. 3826C. BALANCE, Torsion Moisture Test, for determining amount of moisture in butter. This scale is constructed witli percentage beams so that 0.1 per cent to 30 per cent of moisture can be determined without calculation when 10 gram samples of butter are used. By means of two tare beams one or more dishes can be balanced and recorded. Height, 8 inches; depth, 5i^ inches; length, 10% inches over all. With 10 gram weight Net $ 15,00 3826D. BALANCE, Torsion Grain and Seed Test, designed expressly for the determination of moisture in grain. (See Bulletin No. 99, Bureau of Plant Industry.) Has high poise, indicator, arrest and seamless brass seoop. Capacity, 1 kilo. Sensitive to 7 centigrams. Slide beam reads to 10 grams by 1/10 gram. With block of special weights, 100 grams to 5 grams Net 17.50 3830B. BALANCE, Grain Test. Consists of No. 3830 "Ceneo" Agate Bearing Trip Scale (for description see next page) with the addition of a funnel scoop and counterpoise, accurately adjusted 3830A. FUNNEL SCOOP AND COUNTERPOISE, only, of No. 3830B 8.0 2.0 For full line of General Apparatus and Supplies see Catalog M. 128 CENTRAL SCIENTIFIC CO., CHICAGO, XJ. 8. A. ,IIM^i.MlJBI«»"* 3830. 3832. No. 3830. No. 3832. "CENCO" TRIP SCALE, Agate Bearing, Harvard design. In this trip scale we have done away with the rough east and forged iron parts used for years in the Harvard Trip Scale, and employ parts of brass and steel neatly formed by elaborate tools and machinery. This makes possible a degree of perfection never before attained in assembling this style of balance. The BEARINGS consist of HARDENED STEEL PRISMS resting on SIX AGATE SHELVES of large dimensions. This construction adds very materially both to the initial sensibility of the scale and to its ability to retain its sensibility after long continued use. The graduated beam has a range of 10 grams in 1/10 gram divisions. The capacity of the scale is 2,000 grams. Sensibility is guaranteed to be 1/10 gram. Actual tests show a much greater sensibility SCALE, Dispensing and Solution, with AGATE BEARINGS as described under No. 3830. This balance will be found ideal for laboratory and pharmaceutical work. The pans are of non-rusting metal, and 14 cm. in diameter. The graduated beam has a range of 10 g. in 1/10 g. divisions and brass weights from 10 g. to 100 g. are supplied, conven- iently fitted into a projecting holder. Capacity, 2,000 g. Sensibility is guaranteed to be 1/10 g.; actual tests show a much greater sensibility $ 6.65 i.OO No. 3829. 3829. SCALE, Standard Family, slanting white enam- eled dial, weighs 24 pounds by 1 ounce divi- sions; with square sheet steel platform and - tin scoop 1 g5 3841. SCALE, Platform, with patent combination beam. Capacity 500 pounds by % pound divisions; also graduated to 175 kilos by 100 gram divisions. No loose weights, as full capacity is on the beam. "With wheels Net 35.00 3841A. SCALE, Platform, same as No. 3841, but without wheels Net 30.00 For full line of General Apparatus and Supplies see Catalog M. No. 3841. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 129 No. 3901. 3901. WEIGHTS, Precision (Sartorius) . Gold plated. Brass weights, heavily plated with gold; fractional weights of platinum except the 5, 2 and 1 mg., which are of alumi- num, two platinum riders. Put up in velvet lined mahogany case, with ivoi-y tipped forceps. 1 milligram to 100 grams Duty Free $. 9.00 3902. WEIGHTS, Precision (Sartorius). Same as No. 3901, but furnished from stock... Net 16.00 3908 WEIGHTS, Precision (Sartorius). Same as No. 8901, but 1 milligram to 50 grams. Duty Free 8.00 3904. WEIGHTS, Precision (Sartorius). Same as No. 3903, but furnished from stock... Net 14.00 No. 3905. 3905. WEIGHTS, Good Grade. Brass weights, with fractional weights of German silver (ex- cept the 5, 2 and 1 mg. weights, which are of aluminum). In fine mahogany box with brass forceps. „„ 1 milligram to 20 g. 50 g. 100 g. 200 g. 500 g. 1000 g. Each 3.00 3.85 4.00 200 g. 5.55 7.25 10.00 3907. 3909. No. 3907. WEIGHTS, Good Grade. Same as No. 3905, but in a polished hardwood block instead of a box. With brass forceps. 1 milligram to 20 g. 50 g. 100 g. 200 g. 500 g. 1000 g. Each 1.55 • 1.77 2.25 3.35 4.75 7.00 WEIGHTS. Separate weights for No. 8905 or No. 3907. Grams 1 2 5 10 20 50 100 Each 06 .06 .06 .09 .11 .22 .40 For full line of General Apparatus and Supplies see Catalog M. 130 CENTRAL SCIENTIFIC CO.. CHICAGO, V. 8. A. No. 3921. No. 3929. No. 3933. 3915. 3917. 3919. 3921. 3923. 3925. 3927. 3929. 3933. 3934. 3935. 3937. 3938. WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, Grams .. . Each .... WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, WEIGHTS, Kilos Each WEIGHTS, Brass, in block, 1 centigram to 20 grams $ 0.45 200 .45 500 .80 Brass, in block, 1 centigram to 50 grams Brass, in block, 1 centigram to 100 grams Brass, in block, 1 gram to 500 grams Brass, in block, 1 gram to 1,000 grams Brass, single weights, same style as in above sets. 1 2 5 10 20 50 ;.'.... $0.06 .06 .06 .09 .11 .17 Brass, in block, % oz. to 1 lb Brass, in block, % oz to 2 lbs Iron, in nest, 5 grams to 1 kilo (duplicates of 20 and 200 grams) Iron, in nest, 5 grams to 2 kilos (duplicates of 20 and 200 grams) Iron, in nest, 5 grams to 5 kilos (duplicates of 20, 200 and 2,000 grams) . . Iron, single weights, same style as Nos. 3933-3935 100 .25 1,000 1.25 1 .55 2 .75 1.50 Iron, in nest, % oz. to 1 lb. .00 .78 1.77 3.00 3.00 4.25 1.20 1.95 4.20 1.25 No. 3945. 3945. WEIGHTS, Aluminum, square, made concave so they can be picked up readily, % grain to 10 grains, in pasteboard box 3947. WEIGHTS, Aluminum, % grain to 5 grains, in pasteboard box .50 .25 No. 3950. Nos. 3951-3957. No. 3959. 3950. 3951. 3953. 3955. 3957. 3959. WEIGHTS, German Silver, 1 milligram to 500 milligrams, in box with sliding cover; each weight in a separate compartment; with brass forceps 1.33 WEIGHTS, German Silver, fractional parts of a gram, put up in sets, 1 milligram to 500 milligrams, with duplicates of the 2, 20 and 200 milligram pieces, 12 in all, in paste- board box 22 WEIGHTS, German Silver, fractional parts of a gram, same as No. S951; 1, 2, 5, 10, 20, 50, 100, 200, 500 milligrams. Each .05 WEIGHTS, Platinum (1, 2 and 5 milligrams aluminum), fractional parts of a gram, put up in sets, 1 milligram to 500 milligrams, with duplicates of the 2, 20 and 200 milli- gram pieces, 12 in all, in pasteboard box 5.00 WEIGHTS, Platinum (1, 2 and 5 milligrams aluminum), same as No. 3955. Milligrams 1 2 5 10 20 50 100 Each 20 .20 .22 .30 .33 .45 .60 BIDEBS, Platinum. Milligrams 12 5 6 Each 40 .40 .30 .25 200 .85 500 1.50 10 .25 12 .25 For full line of General Apparatus and Supplies see Catalog M. CENTEAL SPTENTTFTP ro., (MITCAOO, TT. S. A. l.-^l No. 4215. No. 4225. 4215. 42 16. 4217. 42 IS. 4219. 4220. 4221. 4223. 4233. BEAKERS, Griffin ronn, liiipe.l ; of best BolKiniau ylass. Xo OiMi oil 1 2 ?, Cai'arity. c.e 31) .">il 7."i l:',ii 2.3ii '.',7,{) Eaeh $0.0G .OS .1)9 .In .1.". .20 BEAKERS, same as Nu. 421.1, iiesteil: Xus. oiiii-i); :; ill nest. I'er lU'st No. 4233. 7.iO loiio 1 liio isoo .33 .4 1 .,10 .60 Nos. 0-2; 3 in iiest. I'er nest. Xos. 1-4; 4 in nest. Per nest. Nos. 0-4; .1 in nest. Per nest. Nos. O-.j; 6 ill nest. Per nest. Nos. 0-7: S in nest. Per nest. BEAKERS, Extra Tall Form, will Xo r'ajiaritv, e e. Eaeli .'. it lip; of hest Poiieiniaii i;l 1 100 10 ISO .14 BEAKERS, Usual Form, without li]); of l>est Poliemiau ylass. No 000 nil II 1 2 Capaeity, ,■ r 25 45 7ii Hm Iso $ 0.23 .34 .70 .79 1.12 2.03 Each .06 .09 .10 .15 t 400 4 400 .21 Nos. 4235-4237. 42.35. BEAKERS, Copper, Griffin form, with lip. I 'apacity, ounces ■! ■' 'o Each 55 .67 .88 4237. BEAKERS, Aluminum, Griffin form, with lip. Capacitv, ounces 4 S 10 Each ..■ -" ■<" 1-UO For full line of General Apparatus and Supplies see Catalog M. 32 1.25 32 1.5U 132 C'ENTEAL SCIENTIFIC CO., CHICAOO, IT. S. A. Nos. 4241-4243. BELLOWS, for blast lamps, blow-pipes, etc. Catalog No 4241 4243 Trade No 9 „9„^ Price $5.00 7.00 4243 9B 11.50 Nos. 4244-4246. BELLOWS, improved pattern, doing away witli injury to rubber disc. More convenient to operate. Catalog No 4244 4245 4246 Trade No 10 lOA lOB Price 6.00 8.00 12.50 KXJBBEE DISCS for above Bellows. Catalog No 4247 4248 4249 Adapted to Nos 9 and 10 9A and lOA 9B and lOB Diameter, inches 9 12 14 Price .67 1.15 l.Oo 4250. NETS for any size of above Bellows, eaeli =-^>-'J No. 4453. No. 4:141. 4441. BLAST LAMP, Bunsen's; tlio oldest and best blast lamp made ; . . 4453. BLAST IiAMP, Gasoline, "Dangler's Lamp." An excellent substitute for gas, giving a high or low flame For full line of General Apparatus and Supplies see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 133 No. 4456. No. 4457. 4456. BLAST LAMP, Laboratory, designed for general work where the laboratory is not equipped with gas. The Burner is rigid and is made of special bronze generator metal. It can be regulated from a small pointed llame -to a large brush flame. The tank is made of heavy seamless drawn brass, fitted with patented automatic brass pump in handle Net $ 3.25 4457. BLAST LAMP, Adjustable Laboratory, fitted with adjustable stand and tripod. After nearly twenty-five years careful study on the part of the manufacturers, we offer our trade this outfit as the best and most convenient Laboratory Blast Lamp made. We call special attention to the many adjustable features. The adjustable stand permits the flame to be pointed in any position desired. The Lamp itself is adjustable, pint size, made of the very best material, and pro- duces a perfect blue flame of intense heat that can be easily regulated. It is strong and durable and is equipped with patented automatic brass pump-in-tank. The tri- pod, which also is adjustable, will hold any ordinary laboratory vessel and can be swung out of the way when not in use. Complete with stand N®* 4458. BLAST LAMP only of No. 4457 Net 4459. STAND only of No. 4457 Not 5.O0 3.2f 2.0( No. 4478. 4477. BLOW PIPE, brass, plain. Length, inches 8 10 Price 4478. BLOW PIPE, brass, with bulb. Length, inches 8 10 Price ^^ •■^" For full line of General Apparatus and Supplies see Catalog M. 12 .12 12 .22 134 CBNTEAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 4541. No. 8056. No. 4543. No. 4545. No. 4545A. No. 4546. No. 4547. No. 4547A. 4541. BOTTLES, Wide Mouth, round, flint glass. Capacity, ounces 12 4 6 8 12 16 32 Per dozen $0.26 .30 .42 .50 .60 .70 .90 1.30 4542. BOTTLES, Wide Mouth, round, green glass. Capacity, gallons % 1 2 Each , .20 .29 .67 4o41A. BOTTLES, Extra Wide Mouth, round, flint glass. Capaeitj-, ounces 3 6 Per dozen .38 .53 4543. BOTTLES, Narrow Mouth, round, flint glass. Capacity, ounces 1 2 4 6 8 12 16 32 Per dozen 25 .28 .38 .45 .50 .70 .85 1.25 4544. BOTTLES, Narrow Mouth, round, green glass. Capacity, gallons % 1 2 Each .18 .31 .60 4545. BOTTLES, Tinctures, flint glass, mushroom stopper. Capacity, ounces 1 2 4 8 16 32 Per dozen SO 1.00 1.25 1.50 2.10 2.75 4545A. BOTTLES, Tinctures, best German flint glass, with flat topped glass stoppers carefully ground in, without mould marks. An excellent bottle for permanent use for reagents or solutions. Capacity, ounces 1 2 4 8 16 32 % gal. 1 gal. Per dozen 1.11 1.25 1.50 2.00 2.66 3.75 6.65 11.00 4546. BOTTLES, Acid, green glass. Capacity Pint. Quart. % Gal. Each .18 .25 .33 4547. BOTTLES, Salt Mouth, flint glass, mushroom stopper. Capacity, ounces 1 2 4 8 16 32 Per dozen 1.00 1.05 1.33 1.50 2.10 2.90 4547 A. BOTTLES, Salt Mouth, best German flint glass, with flat glass stoppers carefully ground in, heavy, nicely finished, without mould marks. Capacity, ounces 1 2 4 8 16 32 Per dozen 1.25 1.40 1.60 2.25 3.10 4.50 For full line of General Apparatus and Supplies see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. 13 4551. 4553. 4563. 4564. 4565. No. 4551. No. 4563. No. 4564. No. 4565. BOTTLES, Aspirator, with glass stopper and stop cock. Capacity % gal. Igal. 2 gal. Each "..... $2.30 3.35 5.00 BOTTLES, Aspirator, same as No. 4551, tubulature at bottom, but without glass stop- per and stop cock. Capacity 1 pt. 1 qt. Vz gal. 1 gal. Each 42 .60 .83 1.30 BOTTLES, Gas Washing, with rubber stopper and fittings. Capacity, pints V2 1 Each .35 .45 BOTTLE, Gas Washing, Screw Type. So constructed that the gas bubbles are com- pelled to pass through a spiral about 120 cm. long, which insures a very efficient ab- sorption. The inner tube is reflux, which prevents the liquid from rising to the top, and insures a continual circulation. With ground in stopper BOTTLES, Gas Washing, Drechsel's, with tubes ground into the neck, high form. Capacity, c.c 125 250 500 Each .65 .84 1.05 2 gal. 2.40 .63 $ 3.35 1 .55 1 .60 Q.' (3 No. 4567. No. 4569. 4567. BOTTLES, Washing, with rubber stopper and flexible delivery tube. Capacity, ounces 8 12 16 Each 33 .42 .45 4569. BOTTLES, Washing, all glass, with tubes ground in the neck. Capacity, ounces Each 4576. BOTTLES, Woulfl'S, with two necks. Capacity, pints Vi V2 Each 35 .40 4577. BOTTLES, WottME's, with three necks. Capacity, pints % % Each .-^^.^..-t 4578. BOTTLES, WoulfC's, with two necks and opening at bottom, Capacity, pints Each For full line of General Apparatus and Supplies see Catalog M, 24 .55 No. 4577. 32 .65 .90 2 .70 2 .83 1 .85 16 1.10 4 1.05 4 1.25 2 1.05 136 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. BOTTLES FOR REAGENTS No. 4587. No. 4593. No. 4589. 45S.5. The labels on these bottles are of raised letters blown in the glass, the surface of each letter being ground so as to render it perfectly distinct. The letter is therefore inde- structible. The following lists will be found to contain the names of all the test solu- tions referred to in the United States Pharmacopoeia. No bottle "WITH OTHER LABELS in this type of bottle is manufactured. If, how- ever, any name not in the list is especially desired, it may be engraved on blank bot- tles at an additional charge of 9c net per bottle. PLEASE OBDEB BY BOTTLE NUMBER. BEAGENT BOTTLES. 1 oz., height 3% inches. Per dozen No. 4586. $ 1.40 326. Gobaltous Nitrate CoCNOj), 336. Gold Chloride AuClj 327. Platinic Chloride PtCl. REAGENT BOTTLES, Wide Mouth, No. 374. Ammonium Phosphate. (NHj)2HPOj 361. Am. Sod. Phosphate. . .NaNH^HPO, 351. Borax NajBA 364. Copper Cu 365. Ferrous Sulphate FeSO, 366. Ferrous Sulphide FeS 367. Potassium Chlorate KCIO3 358. Potassium Cyanide .... KCN 368. Potass. Ferricyanide. .K^FeCCN), 354. Potassium Nitrate KNO, 325. Silver Nitrate (Amber) .AgNOs 341. Blank. 1 oz., height 3% inches. Per dozen. 1.50 372. Test Paper. 353. Sodium Acetate NaCjHaOj 369. Sodium Bitartrate NaHCH^Os 350. Sodium Carbonate NasCOa 370. Sodium Nitrate NaNOj. 376. Sod. Pot. Carbonate Na^COajKsCOa 371. Starch. 373. Zinc. 375. Blank. For full line of General Apparatus and Supplies see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, TT. S. A. 137 4587. No. 3. 30. 18. 17. 15. 82. 19. 16. 31. 97. 33. 20. 32. 401. 406. 21. 23. 22. 83. 407. 408. 409. 36. 35. 58. 29. 28. 2. 419. 428. 1. 87. 414. 27. 410. 90. REAGENT BOTTLES, 4 oz.. Acetic Acid HCjHaOa Alcoliol CsHbOH Ammonium Carbonate . .(NH4)sC08 Ammonium Chloride . . . .NHiCl Ammonium Hydroxide . .NHiOH Ammonium Molybdate . .(NHi)oM0702« Ammonium Oxalate (NH4)!.CsOt Am. Sulptiide (Amber) . . (NH4)2S Am. Sulphocyanlde NHiCNS Am. Sulphydrate NHiHS Barium Carbonate BaCOa Barium Chloride BaCla Barium Hydroxide Ba(OH)j Barium Nitrate Ba(N03)3 Bromine Water. Calcium Chloride CaClj Calcium Hydroxide Ca(OH)2 Calcium Sulphate CaSOi Carbon Bisulphide CSa Chloroform CHCla Cochineal. Coralline. Cupric Sulphate .CuSOi Ether (CzHsJaO Fehllng's Solution. Ferric Chloride Fe^Clo Ferrous Sulphate FeSOi Hydrochloric Acid HCl Hydrochloric Acid, Con . .HCl Hydrogen Peroxide. Hydrogen Sul. (Amber) . .HjS Indigo Solution. Iodine Solution I+KI Lead Acetate Pb(C:H.O.)i Litmus. Magrnesia Mixture. height 5Vi in. Per dozen. No. $ 1.95 24. Magnesium Sulphate . . . MgSOi 25. Mercuric Chloride HgCla 100. Mercuric Potass. Iodide. 86. Mercurous Nitrate Hg2(NOo)2 415. Methyl Alcohol CHsOH " 411. Methyl-Orange. 88. Nessler's Solution. 6. Nitric Acid HNO3 422. Nitric Acid, Con HNO3 93. Oxalic Acid H2C2O4 423. Phenol CoHbOH 412. Phenolphthaleln. 94. Picric Acid CeH20H(N02)3 37. Platinic Chloride PtCU 8. Potassium Carbonate . . . KaCOs 96. Potassium Chromate .... KjCrOi 13. Potassium Dichromate .. KzCrsOT 11. Potassium Ferricyanide. .K3Fe(CN)(, 6. Potassium Ferrocyanide K4(FeCN)6 12. Potassium Hydroxide. . . .KOH 10. Potassium Iodide KI 9. Potassium Sulphate .... K2SO4 7. Potass. Sulphocyanide . . KCNS 26. Silver Nitrate (Amber) .AgNOs 404. Silver Sulphate AgjSOi 60. Sodium Acetate NaCaHsOa 59. Sodium Carbonate NaaCOa 416. Sodium Cobaltic Nitrite. 61. Sodium Hydroxide NaOH 14. Sodium Phosphate NaoHPOi 417. Sodium Thiosulphate NaiSaOa 81. Stannous Chloride SnCla 4. Sulphuric Acid H»SOi 420. Sulphuric Acid, Con H^SOi 413. Turmeric. Blank. 38. 4588. REAGENT BOTTLES. Set of 40 of the above bottles (No. 4587), including the most common names used in the chemical laboratory. Includes Nos. 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 35, 36, 59, 61 and 3 blanks. Complete set in box 4588A. REAGENT BOTTLES, 4 oz., set of 24 according to Fresenius. Includes Nos. 2, 3, 4, 5, 6, 7, 13, 14, 15, 16, 17, 18, 19, 20, 22, 23, 25, 26, 27, 29, 32, 36, 59 and 61. Per set 4588B. REAGENT BOTTLES, 4 oz., set of 12, consisting of Nos. 1, 2, 8, 4, 5, 15, 16, 20, 23, 26, 557 and 61. Per set REAGENT BOTTLES, Wide Mouth, 4 oz., height 4% in. Per dozen 313. Sod. Am. Hyd. Phos.Na(NH4)HP04+4H.O 301. Sodium Carbonate NaaCOa 312. Test Paper. 307. Blank. 4589. 314. 304. 305. 303. 302. 4590. 131. 126. 110. 109. 108. 155. 130. 122. 114. 151. 154. 105. 106. 107. 4591. 204. 227. 229. 218. 223. 225. 230. 224. 217. 4592. 505. 506. 503. 504. 4593. 4594. 4595. Ammonium Sulphate. . . . (NHj)2SOt Borax NaaBiO^ Ferrous Sulphate .FeSOi Potassium^ Cyanide ICON Potassium Nitrate KNO3 REAGENT BOTTLES, 8 oz., height 6% in. Per dozen. Acetic Acid HC.HaOj 152. Alcohol CaHsOH 153. Ammonium Carbonate ...(NH4)2C08 103. Ammonium Chloride NH4CI 104- Ammonium Hydroxide .. .NH4OH 150. Ammonium Molybdate . .(NH4)2MoOi 145. Ammonium Oxalate (NH4)2C20i llf. Am. Sulphide (Amber) . . .(NHi)2S 111. Barium Chloride BaClz 129. Calcium Hydroxide ,Ca(OH)2 l»o- Ferrous Sulphate FeSOi 101. Hydrochloric Acid, Con. . .HCl IJZ. Hydrochloric Acid, Dil HCl Ho- Hydrogen Sul. (Amber) . .H2S REAGENT BOTTLES, Pint, 16 oz., height 7% in. Per dozen. Lead Acetate .Pb(C2H30o)2 Mercuric Chloride HgCla Nitric Acid, Con HNO3 Nitric Acid, Dil HNO3 Potassium Hydroxide . . . .KOH Silver Nitrate (Amber) . .AgNOa Sodium Carbonate Na^COa Sodium Hydroxide .NaOH Sodium Phosphate Na2HPOi Stannous Chloride SnCla Sulphuric Acid, Con H2SO1 Sulphuric Acid, Dil H2SO1 Blank. 6.50 3.90 1.95 2.20 2.50 3.6C Ammonium Hydroxide. . .NHiOH Am. Hydroxide, Dil NHtOH+Aq Am. Sulphide, Dil (NH4)2S+Aa Barium Chloride BaCU Calcium Hydroxide Ca(OH)2 Calcium Sulphate CaSOi Ether (C2H5)20 Ferrous Sulphate PeSO* Hydrochloric Acid HCl REAGENT BOTTLES, Quart, 32 oz., height 9% in. Per dozen. ^ • . ■ ■ 502. Sulphuric Acid, Dil H2SO4 501. Sulphuric Acid, Con HsSOi 511. Blank. 222. 226. 216. 219. 221. 228. 215. 220. 211. Hydrochloric Acid, Con. . .HCl Hydrodisodic Phosphate .NaaHPOi Nitric Acid HNO3 Nitric Acid, Con HNO3 Potassium Hydroxide . . . .KOH Sodium Hydroxide, Dil. . .NaOH+Aq Sulphuric Acid H2SO4 Sulphuric Acid, Con HaS04 Blank. Hydrochloric Acid, Con. . .HCl Hydrochloric Acid, Dil . . . HCl Nitric Acid, Con SS2" Nitric Acid, Dil HNOa CAPS, for Reagent Bottles. CAPS, for Reagent Bottles. CAPS, for Reagent Bottles, Will fit Nos. 4585-4586. Per dozen. Will fit Nos. 4587-4589. Per dozen. Will fit Nos. 4590-4591. Per dozen. 4.4! .7! .8( 1.0( For full line of General Apparatus and Supplies see Catalog M. 138 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 4598. No. 4600. No. 4601. No. 4603. No. 4603A. No. 4602. No. 4604. 4597. BRUSHES, Test Tube, bristle or tufted end, brass wire. Per dozen $ 0.67 •159S. BRUSHES, Test Tube, bristle or tufted end, tinned wire. Per dozen .45 4599. BRUSHES, Test Tube, plain, tinned wire. Per dozen .40 4600. BRUSHES, Test Tube, sponge end, brass wire. Per dozen .67 4600 A. BRUSHES, Test Tube, sponge end, tinned wire. Per dozen .55 4601. BRUSH, Beaker, wood handle. Each 22 4602. BRUSH, Burette (also for long tubes), 3 feet long, tinned wire. Each .10 4603. BRUSH, Funnel, taper end, wood handle. Each .20 4603A. BRUSH, Flask, with pliable end, which adapts itself to the curvature of the flask. Each .33 4604. BRUSHES, Small Tube, bristle on tinned wire. Per dozen .12 No. 4605. 4605. 4606. 4607. No. 4606. Camel Hair. 'Pencils." Large. .27 BRUSHES, Size ; Small. Medium. Per dozen .15 .20 BRUSHES, Camel Hair, for cleaning scale pans, instruments, etc. Flat, with wood handle. Width, inches i/. 1 m 2 Each 15 .18 .22 .33 BRUSH, "Coujiter." All pure bristles. A laboratory necessitj-. Each For CYLINDER BRUSH see page 91. For SOIL TUBE BRUSH see page 39. For KING'S TUBE BRUSH see page 26. For TEST BOTTLE BRUSHES see page 91. For full line of General Apparatus and Supplies see Catalog M. .50 CENTEAL SCIENTIFIC CO., CHICAGO,- U. S. A. 139 Gl! No. 4619. No. 4614. No. 4614A. No. 4619A. 4614. BUBETTES, Mohr'S, with tip and eonneetiou for pinch eoek, but without pinch cock. Capacity, e.e 10 25 50 100 Graduated to 1/10 1/10 1/10 1/10 Each $0.45 .67 1.00 1.80 4614A. BURETTES, Molixs, with glass stop coek. Capacity, c.c 10 25 50 100 Graduated to 1/10 1/10 1/10 1/10 Bach 1-00 1.25 1.65 2.20 4619. BURETTE FLOAT, Erdmann's • 4619A. BURETTE FLOAT, Erdmann's, with points to prevent adherence to the side of the hurette Tor other BURETTES, see page 191. 0.25 .40 No. 4621C. a No. 4625. No. 4629. No. 4631. 4625. BURNER, Bunsen, ordinary form, with air regulator ................... .2 4627 BURNER, Central Draft. A new departure for students' use. Consists of only three pieces No tip to elog up. Substances accidentally dropped into the tube will fall clear through to the table. Perfect combustion, long lived, inexpensive. Each, 20c; 4629. BBSNEB%ame' as'No.'4627,' flt'ted with air damper. Each, 22c; per dozen 2.5 4621C. WING TOP for burners with ^-inoh tube ■ 4631 BURNER, Bunsen, low form, with air regulator ■••••• •, AR^o' -RTrRNER Bunsen, for acetylene gas, with air regulator ^ "/■,■■■ V,' 4632. BURNEK, ■b™"^ J^^ ^^^^ of Generll Apparatus and SuppUes see Catalog M. 140 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 4645. 4647. 4648. 4649. 4653. 4655. 4657. No. 4645. No. 4647. No. 4649. BTmNEE, Boyce's Adjustable, improved regulator. Burns either coal gas or gasoline gas. The best low-priced burner on the market, and the only adjustable burner made whose tube is stationary, whereby all attachments can be used with it to per- fection $ 0.75 BUHNEE,, Boyce's "Acme." Considered by all who have used it to be the most per- fect burner made. Burns either coal gas or gasoline gas, with regulator for both gas and air. Flame cannot strike back. Perfect combustion with high or low flame BUENEK, Boyce's, same as No. 4647, without base. This is the only make of ad- justable burner that can be mounted on a supply tube in any number for construct- ing different forms of heating apparatus for the chemist BXniNEB, Tyrrell's, completely adjusted for both coal and gasoline gas. Substantially constructed with regulator for both air and gas, and considered to be one of the best burners No. 4653. No. 4657. BURNER, Barthel's, Alcohol. Requires no wick, very powerful. Complete with 1% meters flexible metallic tubing and reservoir of 1 liter capacity. "Without tripod. . BURNER, Barthel's, same as No. 4653, but without tubing BURNER, Barthel's, Gasoline. More powerful than the ordinary Bunsen Burner, for which it is an excellent substitute. Requires no wick. Without tripod No. 4661. No. 4673. BURNER, Solid Flame. Gas consumption, 35 feet per hour. This burner will boil Vz gallon of water in 5 minutes and melt 6 pounds of lead or solder- in an iron ladle m 7 minutes. Diameter, 4% inches fl^^^' ^^™® ^^ ^°- ^^^^' ^'^^ ^°^ gasoline gas, with wheel valve BURNER Gas. A portable gas table stove with cast iron top and base and Russia iron body. A steel drip pan is under the burner and the top is raised. Diameter, iR79 A T!™S™?f ' '^^^S^^' ^^2 inches. Very useful in the laboratory 4t>/dA. BURNER, Gasoline, same as No. 4673, furnished with valve and air regulator for burning gasoline gas For full line of General Apparatus and Supplies see Catalog M. 4661. 4663. 4673. 1.40 1.10 1.10 7.50 5.35 5.50 2.00 3.50 1.10 2.00 CENTRAL SCIENTIFIC CO., CHICAGO, TT. S. A. Ul No. 46S1. No. 4682. No. 4683. 4681. CALCIUM CHIiOBXDE TUBES, one bulb, straight delivery tube. Length, inches 4 Each $0.09 4682. CALCIUM CHLORIDI! TUBES, two bulbs, straight dolivory tube. Length, inches 4 Bach .09 4683. CALCIUM CHLORIDE TUBES, Marchand's. Length, inches Each 4684. CALCIUM CHLORIDE TUBES, U form, plain. Length, inches Each 4 .11 5 .15 6 .10 G .12 4 .25 .17 No. 4684. .12 .15 6 .33 .25 No. 4685. No. 4686. No. 4689. No. 4695. 4685. CALCIUM CHLORIDE TtTBES, U form, with side neck. Leneth, inches Each 15 -^3 .30 4686. CALCIUM CHLORIDE TUBES, PeUigot's. Length, inches Ti 1 .35 .67 Each 4689. CALCIUM CHLORIDE JAB, Drying Tower. Height, inches ^ 1" ^^ „ ° ' .42 .50 .62 Each 4695. CARBONIC ACID APPARATUS, Knorr's, for determination of carbonic aeid in carbon- ates, especially baking powder, recommended by the Association of Agricultural Chem- . . Net ists For other CARBONIC ACID APPARATUS see page 9. For full line of General Apparatus and Supplies see Catalog M. $ 6.75 1-42 (■i;ntral sciENxn^ic co., Chicago, u. s. a. 4711. 4720. 4712. No. 4700. No. 4701. 4700. CASSEKOLES, Koyal Berlin Porcelain, with lip and porcelain handle, without cover. Number 1 2 3 3A 4 5 Capacity, c.e 30 75 150 210 375 750 Diameter, mm 50 70 85 95 110 135 Bach $0.40 .55 .60 .85 1.00 1.96 4701. CASSEROLES, German Porcelain, lipped, with cover and wooden handle. Capacity, c.c 125 250 500 Diameter, mm 90 100 135 Bach 45 .50 .80 4703. CASSEROLES, Agateware. Capacity, ounces 16 32 64 Bach 22 .30 .40 No. 4711. No. 4712. CLAMP, Burette. New design with stamped steel jaws of such shape that tubes from % inch up to lig inches in diameter may be held without the use of corks or rub- ber. Without doubt the most convenient all round small size clamp that has been devised. Convenient for clamping thermometers and other small pieces of appara- tus. Provided with check nut for adjusting the jaws in angular position and with a clamp for attaching to upright rod CLAMP, Burette. Similar to No. 4711, but mounted on a rod 10 mm. in diameter and 15 cm. long CLAMP, Burette, for two burettes, designed by Prof. Lincoln of University of Illinois. Burettes are held perpendicular and are easily removed. A very convenient and rigid clamp and nicely made $ 0.33 .25 1.00 it- ^ I * No. 4714. No. 4715. 4714. CLAMP, Burette, Hoffmann's, double. Clamps same as in No. 4711 4715. CLAMP, Universal, with swivel jaws adapting themselves to irregular shapes 4716. CLAMP, Universal, same as No. 4715, large size For full line of General Apparatus and Supplies see Catalog M. .83 .60 .8S CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 143 No. 4718. 4718. CLAMP, Condenser, of stamped steel, -will firmly hold tubes from % inch up to 2i^ inches in diameter. Bod 10 mm. diameter and 15 cm. long 4718A. CLAMP, Condenser, same as No. 4718, but rod 30 cm. long No. 4723. No. 4725. 4723. CLAMP HOLDER, iron, for fastening clamps to rod of support 4725. CLAMP HOLDEK, same as No. 4723, with universal swivel movement. IJ No. 4728. No. 4728 (open). No. 4732. 4728. CLAMP, Screw Compressor, new form, of brass, nickel plated; a combination oi the old form and Hofmaun's form. Can be placed upon any tubing except pressure tub- ing up to A inch inside diameter without disconnecting apparatus 4728A. CLAMP, same as No. 4728, but for pressure tubing up to A inch inside diameter an.! for ordinary tubing up to % inch inside diameter 4728B. CLAMP, same as No. 4728, but for pressure tubing up to 3/. inch inside diameter.. 4732. CLAMP, Mohr's, of brass, nickel plated, for burettes, etc.; suitable for light and ino- dium wall tubing up to A inch inside diameter. Length, 60 millimeters 4733. CLAMP, Mohr's, same as No. 4732. Length, 80 millimeters No. 4740. No. 4741. 4740. CLAMP, Test Tube, of wood, improved form, with brass spring 4741. CLAMP, Test Tube, Stoddard's, of spring brass wire No. 4745. No. 4746. 4745. CLAMP, Watch Glass, of brass, for 2 to ZV^ inch glasses 4746. CLAMP, Watch Glass, of brass, for 2% inch glasses For fuU line of General Apparatus and Supplies see Catalog M. 0.33 .45 .18 .45 .20 .21 .22 .09 .10 .05 .1 .11 144 CENTRAL SCIENTIFIC CO., CHICAGO, U. 8 A. ^^y- 3 — — No. 4755. 4755. COMBUSTION BOATS, Porcelain. Length, mm 60 75 75 100 Width, mm 10 11 15 18 Each $0.22 .22 .22 .27 » . .. ii .i ^ ^ :^3t No. 4771. No. 4771A. 4771. COMBUSTION TUBE (Reduction Tube), of Bohemian hard glass, with bulb on end. Length, 15 cm $ 0.18 4771 A. COMBUSTION TUBE (Reduction Tube), of Bohemian hard glass, with bulb in cen- ter. Length, 15 em .20 4771B. COIOBUSTION TUBES, Bohemian Hard Glass, straight, open at both ends, well an- nealed. Length, cm 30 45 Inside diameter, mm 10 19 Each .17 .50 I'iii. i.iMi. 1-iii.u to aiifaiiia^^^^^^^^^^^^^^ h.. .M i idiiifaiiiiiM^^^^^^ No. 4772. 4772. COMBUSTION TUBES, German Porcelain, glazed inside. Length, cm 30 45 60 Diameter, outside, mm 15 15 15 Each .42 .80 1.40 4772A. COMBUSTION TUBES, Fused SiUca, melting point about 1,500 degrees C; unaffected by sudden changes in temperature. Length, cm CO 60 GO Inside diameter, mm 15 18 21 Each Net 3.50 4.20 4.60 For COMBUSTION TUBING, see page 150. No. 4773. 4773. CONDENSERS, Liebig's, glass, with rubber connections. Length, inches 15 20 24 Each .95 i.io 1.50 4775. CORKS, Regular Length, XX quality. Diameters given are for the large end. No 1 2 3 4 5 6 7 8 9 10 Diameter, inches. . % /s 1/2 ^j % ii % il % it 1 Per dozen 03 .03 .03 .03 .03 .04 .05 .06 .07 .08 .09 Per gross 15 .17 .17 .21 .23 .30 .33 .45 .55 .65 .80 No 11 12 13 14 15 16 18 20 22 24 26 Diameter, inches.. Ifs 1% 1-ft II/4, 1-ft 1% IVa 1% 1% 1% 2 Per dozen 10 .11 .12 .14 .16 .18 .22 .30 .35' .45 .55 Per gross.: 90 1.00 1.05 1.20 L35 1.65 1.95 2.20 2.90 3.50 4.00 4776. CORES, same as No. 4775. No. to No. 11, assorted, in gross packages only 4778. CORES, Plat (Specie Corks), XX quality. Diameters given are for large end. Diameter, inches. . 1 1% IV2 1% 2 2% 2% 2% 3 3% 4 Length, inches.... Va 1/0 1/3 1/2 yg 1/3 5^ 5^ B/g 5/g % Per dozen 08 .11 .15 .20 .25 .33 .44 .60 .70 1.00 1.40 For fuU line of General Apparatus and SuppUes see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, IT. S. A. 14S No. 4800. No. 4807. No. 4819. No. 4820. CRTTCIBIiES, Hessian, Sand, round form. Dimensions are outside measurements. No A B C D E Height, mm 66 76 89 101 114 Diameter, mm 41 47 57 60 73 Each $0.03 .04 .05 .06 .07 Per dozen 25 .33 .45 .50 .66 CRUCIBLES, Royal BerUn Porcelain, glazed inside and outside, with cover. No 000 00 1 2 3 4 5 Capacity, c.e. .5 10 15 30 57 95 155 280 Diameter, mm.. 26 30 35 41 52 62 72 87 Height, mm.... 19 25 27 35 43 50 59 72 Each 20 .23 .27 .38 .46 .59 .73 .87 CRUCIBLES, Gooch's, Royal Berlin Porcelain, glazed inside and outside, with per- forated bottom. No 2 3 4 Capacity, e.e 10 25 35 Diameter, mm 27 35 40 Height, mm 30 40 43 Each .35 .50 .55 CRUCIBLES, Fused Silica, 99.8%, SiOj. May be subjected continuously to tempera- tures up to 1300° C, and for short periods to much higher temperatures. Not affected by rapid changes of temperature, nor by acids, eixeept hydrofluoric, and, above 400° C, phosphoric. No 00 1 2 3 Diameter, mm 40 41 47 57 67 Height, mm 20 25 28 37 45 Each .Net .60 .60 .75 .90 1.25 CRUCIBLE COVERS, Fused SiUca. No 1 2 3 4 Diameter, mm 45 51 60 70 Each Net .50 .60 .75 .90 No. 4837, No. 4839. No. 4840. DESICCATORS, Scheibler's, of Bohemian glass, cover ground air-tight. Diameter, inside, inches 3% 5 6 Each "O l-"" .^•^° DESICCATOR, Scheibler's, vacuum, with stop-cock and hook, inside diameter, 5^ in. . DESIOCATOR, Atwater's. Inside diameter, iVz inches; with triangle DESICCATOR PLATES, of porcelain, with three small feet and with 3 or 4 holes, according to size of plate. Diameter, inches 3% *% 072 Each 6^ -84 {"or full line of General Apparatus and Supplies see Catalog W 1.10 3.10 1.65 146 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 4845. Nos. 4847-4849. No. 4846A. 4845. DISHES, Crystallizing, Light Glass, with flat bottom and straight sides. Diameter, inches.... 2 3 4 5 6 8 10 Each $0.10 .15 .22 .30 .40 .07 1.00 4846A. DISHES, Graniteware. Diameter, cm 15 18 22 Capacity, liters % 1 2 Each .17 .20 .22 4847. DISHES, Evaporating, German Porcelain, glazed inside. No 9 8 7 6 5 4 3 2 1 Diameter, inches 2% 3 3 1/2 4 iVs " 5 51/2 6 6% Capacity, ounces 1 2 21/0 3Vi 6 7V2 10 13 16 Each 11 .13 .17 .19 .22 .27 .30 .40 .50 4848. DISHES, Evaporating, German Porcelain, same as No. 4847, but larger, with heavy rim. No 6 5 4 3 2 1 Diameter, inches 7% 8% 9y2 10% 11% 121/2 14% Capacity, ounces 28 38 50 75 92 120 200 Each : . .60 .67 .75 1.25 1.40 1.65 2.65 4849. DISHES, Evaporating, Boyal Berlin Porcelain, glazed inside and outside. No 00 1 2 3 ■ 4 5 6. 7 8 9 Diameter, inches 2% 3 3% 3y2 4 4% 4% 6-78% 10% Capacity, ounces 2 3 3V. 4y, 6% 8 10 16 28 48 70 Each 22 .25 .33 .38 .43 .48 .65 .76 1.05 1.25 1.80 4850. DISHES, Evaporating, Fused Silica, with lip. UnafEected by sudden or extreme changes of temperature. See further description iinder No. 4820. No 1 3 5 7 9 Diameter, mm 51 70 83 89 98 Depth, mm 21 25 30 22 30 Each Net 1.00 1.15 1.25 1.35 1.60 No. 4851. 4851. DISHES, Lead. Diameter, inches Each 4853. DISHES, Milk, of aluminum, flat bottom, straiglit sides, Diameter, inches Height, inches Each Tor DRYING OVENS see pages 157-161. No. 4853. 2 3 .10 .15 4 .20 2 3 V2 % .21 .33 4 1 .50 No. 225. No. 227. 225. FILES, round (rat tail), second cut. Length, inches 4 5 6 Each 09 .10 .11 227. FILES, triangular (slim taper), single cut. Length, inches 4 5 6 Bach 07 .09 .10 For full line of General Apparatus and Supplies see Catalog M. .13 8 .13 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. 14 No. 4881. No. 4892. No. 4893. For 4881. FHiTEK PAPER. A pure white paper of superior quality, strong and rapid. qualitative work. Cut in round filters, 100 in a package. Diameter, em . . .„ 7.5 10 12.5 15 20 25 33 Per package $0.10 .12 .15 .20 .30 .4.') .60 4882. FILTEB PAPER, same quality as No. 4881, in sheets 48x48 cm. Per quire, 40 cents; per ream ' $ 6.65 4892. FILTER PUMP (Aspirator). New design. Constructed of brass on an entirely new idea and will produce a higher vacuum in less time and using one-third less water than any other pump made. Small size, % inch I. P. thread 1 25 4892A. FILTER PUMP, same as No. 4892, large size, % inch I. P. thread 2.00 4893. FILTER PUMP, Richards', of brass, small size, % inch I. P. thread 1.50 4893A. FILTER PUMP, Richards', of brass, large size, % inch I. P. thread 1.80 4893B. FILTER PUMP, Richards', of brass, extra large size, % inch I. P. thread 6.67 No. 1894.J No. 4895. No. 4896. W No. 4897. 4894. 4894A, 4894B. 4895. 4895A, 4895B. 4896. 4897. COUPLING, Filter Pump, to connect Nos. 4892 or 4893 with threaded faucet COUPLING, Filter Pump, to connect Nos. 4892A or 4893 A with threaded faucet COUPLING, Filter Pump, to connect No. 4893B with threaded faucet COUPLING, Filter Pump, to connect Nos. 4892 or 4893 with smooth faucet COUPLING, Filter Pump, to connect No. 4892A or 4893A with smooth faucet COUPLING, Filter Pump, to connect No. 4893B with smooth faucet COUPLING, Universal. This coupling is not threaded, but merely slipped on a faucet and fastened with a chain. Can be attached to any water faucet m a minute. The best and simplest device for attaching stills,, water motors, turbines and centrifuges to a common faucet. It is practical, self -tightening and air tight. FILTER TUBES, Carbon Filters, to fit Gooch crucibles. Diameter at top, mm 25 30 35 Each 22 .25 .30 For fuU Une of General Apparatus and Supplies see Catalog M. .30 .50 2.25 .50 .50 2.25 2.00 1-1S CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 4901. No. 4901A. No. 4903. 4901. FLASKS, Flat Bottom, best German glass. Capacity, ounces 12 4 6 Each $0.07 .08 .09 .10 .13 4901A. FLASKS, Ring Neck, best German glass, flat bottom. Capacity, ounces Each . ". 4901B. FLASKS, Flat Bottom, new Jena glass, vial mouth. Capacity, c.c 50 100 Each 14 .15 4902. FLASKS, Bound Bottom, best German glass. Capacity, ounces .... 2 4 6 8 Bach 08 .09 .10 4903. FLASKS, Erlenmeyer's, best German glass. Capacity, ounces 2 Bach 08 4903A. FLASKS, Erlenmeyer's, new Jena glass, vial mouth. Capacity, c.c 50 Each 12 .13 4 .09 12 .14 4 .09 200 .20 12 .14 6 .11 100 , .14 16 .18 24 .22 .13 500 .31 32 .27 16 .18 700 .40 16 .18 .14 250 .17 24 .22 12 .16 500 .30 32 .27 16 .18 750 .35 64 .45 32 .27 1000 .50 64 .45 32 .30 1000 .50 No. 4904. No. 4905. No. 4906. 4904. FLASKS, Fractional Distillation, best German glass, side neck. Capacity, ounces 2 4 8 16 Each ; 18 .22 .30 .40 4905. FLASKS, Filter, Erlenmeyer's form with side neck, best German glass. Capacity, ounces 8 16 32 Each .30 .35 .55 4906. FLASKS, Kjeldahl's, digesting, pear shaped. Bohemian glass. Capacity, c.c 250 500 Bach .20 .35 490GA. FLASKS, Kjeldahl's, digesting, pear shaped, with extr^ long necks, new Jena glass. Capacity, c.c 200 500 1000 Each .23 .40 .60 For full line of General Apparatus and Supplies see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, II. ,S. A. 149 No. 4907. No. 4909. No. 4910. No. 4911. 4307. FLASKS, Extraction, Soxhlet's, low form, with extra wi^le inuutli for extraction appa- ratus. i.'aparitv, ,/. ,_ liO ]:i5 2.10 Earli . .' $n.ri9 .12 .2'2 4fii.i7A. FLASKS, Extraction, Soxhlet's, New Jena glass, low form, extra wide month. Capacitv, c. c TOO 2."i0 Eaeh . .' 17 .25 49(N. FLASKS, Extraction, Knorr's, for mercury seal. See page 64. 4909. FLASKS, Volumetric, or liter flasks, volume fixed with one mark on tlie neck, very accurate. Capacitv, c.r .50 100 250 500 1,000 Each .'. 22 .25 ..35 .50 .6.3 4910. FLASKS, Volumetric, same as No. 4909, witli giuund glass stopper. Capacitv, c.c 50 " 100 ' 250 500 1,000 Each . '. 26 .30 .50 .67 .75 4911. FLASKS, Volumetric, glass stopp'cr, with two marks, so that exact amounts may be received and delivered. Capacitv, c.c lOn Each ." i5 500 .90 1,0110 1.25 Nos. 4915-4916. 4915. FORCEPS, Steel, heavy, for general laboratory work. Length, inches ^ Each 09 4916. FORCEPS, Brass, same style as No. 4915. Length, 5 inches 5 .10 No. 4921. No. 4921C. No. 4922. 4921. FUNNELS, Glass, angle of 60', stem ground to a point. Diameter, inches l^'^ 2 2ij 3 3'.^ 4 5 Each 07 .OS .09 .12 .14 .16 .20 4921C. FUNNELS, Glass, Ribbed. Diameter, inches ^i/. 4 Each 1"^ -^^ 4922. FUNNELS, Separatory, ordinary shape, 60 Diameter, inches jl Eaeh ^ —' 4924. FUNNELS, Separatory, cylindrical Capacity, c.c SJ' Each '^^ For full line of General Apparatus and Supplies see Catalog M. 6 09 6 .IS .17 No. 4924. 8 .38 6 OO 6 1.65 100 1.05 150 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. ■^f No. 4926. No. 4927. No. 4928. No. 4951, 4926. FUNNEL TUBE, Thistle Top, straight stem $ 0.08 4927. FUNNEL TUBE, Thistle Top, simple safety stem .17 4928. FUNNEL TUBE, Thistle Top, one bulb safety stem .18 4951. GAS BAGS, oval, pure rubber. Capacity 1 gal. 2 gal. 3 gal. 5 gal. Each 2.20 2.75 3.35 3.75 4952. GAS BAGS, same as No. 4951, with brass stop cock. Capacity 1 gal. 2 gal. 3 gal. 5 gal. Each 0.25 3.75 4.40 5.00 4973. GAUZE, Iron Wire, 20 mesh, to put under dishes. Size, inches 4x4 5x5 6x6 sq. ft. Each 04 .06 .07 .27 4974. GAUZE, Iron Wire, 5x5 inches, with asbestos center .10 4975. GAUZE, Brass Wire, 20 mesh, to put under dishes. Size, inches 4x4 5x5 6x6 sq. ft. Each 08 .12 .15 .50 4977. GAUZE, Copper Wire, for combustion, etc. Mesh 40 60 80 100 Per square foot :, 55 .67 .90 1.80 4978. GLASS BEADS, used to create a large surface in tubes for absorption of gases, per lb 1.00 49S0. GLASS BOD, best German glass, free from lead, in 5-foot lengths, from % to % inch, per lb. .? .44 4980A. GLASS BODS, Stirring Bods, with rounded ends. Size, inches 5 x i^d 8 x i^ 10 x % Per dozen 16 .33 .50 o o © © Q (^ f^.^cA No. 4981. GLASS TXTBING IS LISTED BY OUTSIDE DIAMETERS. 4981. GLASS TUBING, Best German Soft Glass, in 5-foot lengths, sizes Vs to 1 inch, per lb. .44 4982. GLASS TUBING, Best German Soft Glass, sizes 1%, 1%, IVn, 1% and 2 inches, per lb. .55 CAPILLARY TUBING IS LISTED BY INSIDE BORE. -1986. GLASS TUBING, CapiUary, 6-7 mm. diameter, %, 1/2, %, 1, 1%, 1%, 1% millimeter bore. Per lb .6' COMBUSTION TUBING IS LISTED BY INSIDE DIAMETERS. 49S8. GLASS TUBING, Combustion, best Bohemian hard glass, from % to 1 inch inside diameter. Per lb -75 Por COMBUSTION TUBES, with annealed ends, see page 144. 4989. GLASS TUBING, Combustion, new Jena glass, in 100 cm. lengths only. Diameter, outside, mm 12 18 20 25 Per length 22 .33 .55 .67 For full line of General Apparatus and Supplies see Catalog M. CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 151 No. 4998. No. 5001. No. 5003. No. 5007. •^En, SCI. co- No. 5009A. 250 .80 250 1.05 500 1.05 500 1.50 4996. GLOVES, Asbestos Mittens. Per pair 4998. GLOVES, Bubher, Acid Gloves, heavy, gauntleted. . Sizes for women, 6 to 9. Per pair Sizes for men, 10 to 12. Per pair 4998A. GLOVES, Bubber, pure gum, short, per pair Sizes 6 to 10. (Example: Kid Glove No. 8 takes Rubber Glove No. 10.) 5001. GBADXTATES, Cylindrical, German glass. Double graduation, so that the divisions may be read up or down. Capacity, c.c 10 25 50 100 200 Each 27 .35 .45 .56 .75 5003. GBADXJATES, Cylindrical, saine as No. 5001, with glass stopper. Capacity, c.c 50 100 , Each 60 .76 5007. GBADXTATES, Cone Shape, glass, metric measure. Capacity, c.c 30 60 100 200 250 500 Each 25 .28 .33 .40 .55 .83 5009. GBADXTATES, Cone Shape, glass, metric and English measure, double graduation. Capacity, ounces 1 2 3 6 8 16 Capacity, c.c. 30 60 100 200 . 250 500 5!a,ch 30 .37 .45 .55 .65 1.00 5009A. GBADXTATES, Enameled. These graduates are of seamless enameled ware and are Blainly graduated on the inside in grams, ounces, and pints. Capacity, grams Smallest division grams Capacity, ounces Smallest division ounces Capacity, pints Each Net $ 3.35 2.50 2.50 1.10 100 10 3 1 500 50 16 2 1 1.00 1000 2.00 1000 2.25 1000 1.25 32 1000 1.65 1000 100 32 2 2 1.35 5012. 5013. I No. 5012. HOT PLATES, Drying Tables, for use with gas. The top is of one piece of steel, with polished surface. The legs and frame arc of cast iron. Flame easily regulated. Gives an even temperature. . Size of plate, inches 10 x ISYa UVa x 18% 18% x 25y2 Number of burners 1 ^ 3 Each Net 6.25 9.00 14.00 HOT PLATES, same as No. 5012, but for use with gasoline gas. Size of plate, inches 10 x I8I/3 14% x 18% 18% x 25% Eacli Net 6.90 10.00 15.40 For fuU Une of General Apparatus and SuppUes see Catalog M. 152 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. Tvr" No. 1125. No. 1127. 1125. 1127. 5023. 5024. 5024A, 5025. 5027A. 5027B. 5027C. No. 5023. No. 602 12x2 .38 15x2 .50 15x3 .83 18x3 1.10 12x2 .38 15x2 .50 15x3 .83 18x3 1.10 JABS, Hydrometer, with lip. Size, inches 10 x 1% Each $0.30 JABS, Hydrometer, with flange. Size, inches 10 x 1% Bach 30 JABS, Nessler's, for ammonia tests in water analysis, of clear glass with ground and polished bottoms. Graduated 50 c.c. 100 e.e. 50 and 100 o.c. Each .40 .50 .60 JABS, Nessler's, tall form, 225 mm. high, graduated at 50 c.c $ 0.50 JABS, Nessler's, same as above, but in sets of six to agree. Per set 2.75 JABS, Stoneware, with handles and covers for storing of ordinary chemicals. Are pref- erable to a galvanized iron can for the refuse from the chemical laboratory. Capacity, gallons % 1 2 4 6 8 Each 33 .45 .50 .95 1.40 1.80 JAB, Battery, round form, 4x5 inches, capacity 1 quart .17 JAB, Battery, round form, 5x7 inches, capacity % gal .22 JAB, Battery, round form, 6x8 inches, capacity 1 gal i .27 201 c a«i ) 5035. 5036. 5037. 5039. No. 5035. LABELS, red border, gummed, rectangular. Number 223 217 213 209 205 201 261 259 219 Per box 07 .07 .07 .07 .07 .07 .07 .07 .07 Note.— Nos. 201, 205, 209, 213, 217 and 223 are shown full size in cut. No. 219 measures 18 X 40 mm.. No. 259 measures 14 x 33 mm., No. 261 measures 15 x 50 mm. LABELS, red border, gummed, oval shape. Number 241 239 229 Size, inches %x% % x 1% 114x1% Per box .07 .07 .07 LABELS, red border, gummed, rectangular. Number 2001 2002 2003 2004 2005 2006 2007 Size, inches iy2x3% 1x3% 2x4% 1x2% l%x4 l%x4 l%x2% Per box .25 .21 .42 .17 .33 .30 .20 LABELS, Chemical, gummed and perforated, per book For LITMUS PAPBE, see page 167. For LITMUS PENCIL, see page 162. For fuU line of General Apparatus and Supplies see Catalog M. .45 CENTBAL SCIENTIFIC CO., CHICAGO, V. S. A. 153 No. 5045. No. 5047. No. 5049. No. 5054. 5045. 5047. 5049. 5051. 5052. 5053. 5053A, o054. 5054A, 6071. 5072. 5073. 5075. 5077. 4 .40 2 .45 LAMPS, Alcohol, Bohemian glass, with ground cap, wick and wick holder. Size, ounces 4 g Each $0.25 .40 LAMPS, Alcohol, Bohemian glass, with side tubulation glass stoppered, ground cap, wick and wick holder. Size, ounces Each LAMPS, Alcohol, brass, with cap and wick. Size, ounces Each LAMP WICKS, for alcohol lamps Nos. 5045-5049. Per dozen LAMP WICK HOLDERS, brass, for Nos. 5045 and 5047. Per dozen LAMP CAPS, glass, for No. 5045 or No. 5047, 4-oz. size. Per dozen LAMP CAPS, glass, for No. 5045 or No. 5047, 8-oz. size. Per dozen LAMP, Alcohol Stove, of brass, nickel plated. A powerful burner producing more heat than any other alcohol stove. Adopted by IT. S. army and most European armies. It generates its own gas, has an invisible wick which never requires re- newal, is smokeless and odorless. Weight, 8 ounces; capacity, 7 ounces LAMP, Alcohol Stove, as used on Moisture Testers For ItnCEOSCOPES, see next page. .50 4 .50 0.08 .20 .85 .85 1.00 3.00 No. 5071. Nos. 5073-5075. No. 5077. MOBTAKS, Iron, vase shape, heavy, with pestle. 04s ^•'^tr*' :•:;■:::::::::::::::: 4^x5 5%x5 6%x6 sxt EaSi .".'.v................! 45 -65 110 1-6^ MOKTARS,' Iron, ChiUed, practically as hard as steel for powdering hard substances, with extra large heavy pestles. ^ Capacity gallons /^^^ g^7 Size, inches g-^Q ^ qq Each MORTARS, Porcelain, shallow form, with porcelain pestle. 4501 Number .. 6 5 ^ ^ S .'..'" .''..■.■.■.■.■.■.■.■•■•■■■.■.■.■.■.■.■.■.'.::■.:: .Is 40 .48 .es .75 .90 MORTARS, Wedge-wood, aeid proof, pestle with wood handle. „ ^ _ „ Number 0000 000 00 1 2 3 4 5 b Diameter, inches 2% 3 3% 3% 4%. 5 5% 6 6% 7 Each 33 .40 .50 .55 .60 .07 .83 1.00 l.dU i.oo MORTARS, Glass, with pestle. o 4 8 16 Capacity, ounces ^ ^ g Diameter, inches 2% 4 4% ^^ Each '■" For full line of General Apparatus and Supplies see Catalog M. L54 lENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. MICROSCOPES AND ACCESSORIES No. 45 SPENCER MICROSCOPE SPECIAL FEATXTBES. I. Size of stage, 112 mm. wide, 108 mm. deep. II. Distance from optical axis to base of the arm, 80 mm. III. Genuine vulcanite covers the whole of the top of the brass stage and edges as well, it being vulcanized directly to the brass, instead of being simply screwed to the stage. IV. Nearly the whole microscope, including body tube, finished with our black alcohol-proof lacquer, thus avoiding the reflection of light into the eyes. V. Compact construction, being made somewhat lower than microscopes of other makers and allowing greater ease in using. VI. Pine adjustment bearings automatically lubricated and protected from dust.. VII. Mne adjustment ceases to work when objective is in contact with th3 cover glass. VIII. The upper iris diaphragm is automatically locked open when condenser is in place. IX. Symmetry of outline and beauty of finish. X. Handle-arm for convenience and protection in handling. XI. It is of low and compact construction, which enables one to use it with the greatest degree of ease and comfort. It is equipped with standard quick-screw sibstage with friction collar for the con- denser, circular dust-proof nosepiece, uppir and lower iris diaphragms, tube, rack and pinion, mirror and optical parts the same as used on our higher priced instru- ments. Prices include a neat hardwood cabinet. Catalog No. Abbe Condenser Nose-piece Achromatic Objectives Equiv. Foe. mm. Eye-pieces Price 45A 16,4 16,4 16,4 16,4 16, 4, 1.8 Oil-imm. lOx lOx 6x, lOx 6x, lOx 6x, lOx $32.50 45B Double 36.50 45C 34.00 45D Double Triple 38.00 45H N. A. 1.20 65.00 Drop-swing condenser mounting can be added for $5.00 additional. For other anCROSCOPES see Catalog N. CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 155 No. 66 SPENCER MICROSCOPE This Microscope, which has been on the market since 1906, has proved a great success. For elementary laboratory work in high schools, colleges and academies it has become the most popular of microscopes. Probably no microscope has ever been marketed which from the first met with more hearty approval. Within the past few years this microscope has been so completely rebuilt, enlarged and improved that to those who are unfamiliar with these developments it is almost an entirely new instrument. To those who contemplate equipment for elementary or general laboratory work the ad- vantageous features of this microscope will surely commend themselves. SPECIAL FEATURES. I. Size of stage, 95 mm. wide, 103 mm. deep. II. Stage 112 mm. wide may be substituted at same price. III. Distance from optical axis to base of arm, 60 mm. IV. Genuine vulcanite covers the whole of the top of the brass stage and edges as well, it being vulcanized directly to the brass. v. Black body tube, entire instrument alcohol-proof lacquered. VI. Compact construction, it being made somewhat lower than usual, thus allowing greater ease in using. VII. Fine adjustment bearings automatically lubricated and pro- tected from dust. VIII. Fine adjustment ceases to work when objective is in contact with the cover glass. IX. Symmetry of outline and beauty of finish unexcelled. X. Handle-arm for convenience and protection in handling. XI. Iris diaphragm nearly flush with upper surface of the stage, and is operated by a knurled ring which can be reached from any side. Prices include a neat hardwood cabinet. Catalog No. Nose-piece Achromatic Objectives Equiv. Focus mm. Eye-pieces Price 6GA 66B 66C 66D Double Double 16,4 16,4 16,4 16,4 lOx lOx 6x, lOx 6x, lOx $27.50 31.50 29.00 33.00 Note. — :The above outfits are suitable for the examination of starches, etc. For micro- organisms such as yeasts, moulds and bacteria No. 66H at $60.00 should be pur- chased. This is supplied with Abbe condenser, N. A. 1.20, triple nose piece, and 1.8 mm. oil-immersion objective, in addition to the eye-pieces and objectives of No. 66D. For other MICROSCOPES see Catalog N. 156 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 7500. 7502. No. 7500. No. 7DUA DISSECTING MICROSCOPE, Barnes, hardwood polished base, movable glass stage mirror, and two lens magnifier. Fine screw and also sliding adjustment. Block is provided with pocket for holding dissecting tools. Bach DISSECTING MICROSCOPE, same block as No. 7500, fitted with 12 X Doublet Mag- nifier which gives a perfect definition. Each DOUBLETS $ 1.50 2.25 ABC These are made with special reference to producing the best magnifier of the kind made. They consist of two piano-Convex lenses very substantially mounted. They give excellent definition and an exceptionally large, flat field. Magnifi- cation Focal Distance Working Distance mm. Real Field mm. Price No. Milli- meters Inches App-ox. Mount, aor b Mount, c 7508 7514 6X 18X 41.6 13.9 1.6 0.5 22 8 22 8 $1.00 1.00 '$1.25 1.25 Nos. 7632-34. Nos. 7538-40. No. 7542. 7528. MAGNIFIER, Pocket, the mountings are well seasoned rubber, very light and durable; in every respect a superior article; diameter of lens, 18 mm 7530. MAGNIFIER, Pocket, diameter of lens, 30 mm 7.332. MAGNIFIER, Pocket, diameters of lenses, 15 and IS mm 7534. MAGNIFIER, Pocket, diameters of lenses, 28 and 30 mm 7536. MAGNIFIER, Pocket, diameters of lenses, 12, 15 and 18 mm 7538. MAGNIFIER, "Linen Tester," magnification about 10 diameters, nickel-plated brass mounting, with 14-inch square aperture 7540. MAGNIFIER, "Linen Tester," with %-inch square aperture 7542. MAGNIFIER, Tripod, giving a large, clear field and sufficient magnifying power for elementary botanical and zoological studies. The lens is focused by "screwing up or down in the brass frame MICROMETERS 7606. MICROMETER, Stage, glass object slide with finely ruled scale, 1 mm. divided into 100 parts 7610. MICROMETER, Eyepiece, glass disc with finely ruled scale to be laid upon the dia- phragm of an ordinary Huyghenian eyepiece, 5 mm. divided into 50 parts (to 0.1 mm.) 7612. MICROMETER, Eyepiece, same as No. 7610, divided into 100 parts (to 0.05 mm.) For other Microscopes and Accessories see Catalog N. .35 .55 .55 .90 .65 .27 .27 .40 3.50 1.25 1.50 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 157 iJL Nos. 4858-60B. OVENS, DBYING. Drying Ovens Nos. 4855-4860B are 6f heavy planished copper with tubulations for ther- mometer and gas regulator, and are mounted on separate iron supports provided with false bottom of sheet iron to protect the copper. Cat. No. 4855 Height outside, inches. 6 Single Wall ^ Width Depth outside, outside, inches, inches. 8 6 10 8 12 10 24 18 36 18 KB and WATE] Price. $ 5.00 6.75 8.50 30.00 52.00 B LEVE] Cat. No. 4858 , D Height outside, inches. 6 ouble W2 Width outside, inches. 8 10 12 24 36 11 s Depth outside, inches. 6 8 10 18 18 Price. $ 7.00 4856 8 4859 8 9.50 4857 10 4860 10 12.50 4857A 4857B For V 18 18 iTATBR GATI 4860A 4860B 4, see page 193. 18 18 50.00 75.00 T" No. 4860C. 4860C. OVEN, Drying. Single wall, three compartments. Of heavy polished copper; 21 inches long, 8% inches high, 7 inches deep, with 'three chambers, each 7 inches deep and 7 inches wide; spp.arate doors, ventilators and two tubulatures for each. Provided with sheet iron back and support, arranged for table or wall • 8100. THBRMO-KEGTJLATOK. This improved Eeichert Gas Regu- lator secures constant temperature at any desired point from 1° C. to near the boiling point of mercury. Especially adapted for water baths, drying ovens, sterilizers, etc. Each. For fuU line of General Apparatus and SuppUes see Catalog M. 22.00 2.00 No. 8100, 158 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A No. 48600. 4:860D. OVEN, Asbestos Drying, of the type used in the U. S. Bureau of Soils. This oven is very substantially made of heavy asbestos board, and measures 13 inches deep, 18 inches wide, and 48 inches, high. Openings are provided at the top for ■ ther- mometer and gas regulator and near . the bottom for gas inlet tube. Very satisfac- tory for drying large quantities of soil samples. Complete with 5 removable shelves $ 50.00 No. 4860E. 4860E. OVEN, Soxhiet's Drying, of copper, with Soxhlet copper bulb condenser, for the rapid determination of moisture. A determination of solids in milk can be made in • about 18 minutes. Drying chamber 470 mm. long by 95 mm. wide by 30 mm. high. The water space between the double walls is to be filled with salt solution. Fur- " nished complete with 5 nickel dishes with cover, shovel for dishes and thermom- eter Duty Free 4860F. OVEN, Soxhiet's Drying. Similar to No. 4860E, but electrically' heated, both the oven proper and the exhaust flue being provided with suitable heating units. "With as- bestos insulation. In ordering specify voltage desired Duty Free For full line of General Apparatus and Supplies see Catalog M, 44.50 70.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. 8. A. 151 DRYING OVENS, ELECTRIC N°- *861. No. 4861B-C. No. 4863. The Electric Oven is the only device for laboratory work that gives the same meas- ured amount of heat every time, distributes that heat evenly and is absolutely free from drafts. The double walls are packed with asbestos to conserve the heat, and when the door is closed the oven becomes an air-tight box. Within, at the top and bottom of the oven, are the two heating plates. As soon as the current is turned on, these at once become hot throughout their whole area and give a steady, measured heat to every part of the oven, a heat that comes from above as well as below; a heat that is the same every time with the same position of the switch, and the effect can be measured by the clock. 4861. OVEN, Electric Drying. Inside dimensions, 12 inches wide, 12 inches deep, 14 inches high. Weighs 30 lbs. Three heats. Eour feet cord and plug switch. 1100 watts. (See note.) -. Net $ 20.00 4861A. OVEN, Electric Drying. Inside dimensions, 19 inches wide, 12 inches deep, 13 inches high. Weighs 60 lbs. Three heats. Pour feet cord and plug switch. 1600 watts. (See note.) Net 25.00 4861B. OVEN, Electric Drying. Inside dimensions, 15 inches wide, 18 inches deep, 11% inches high. Weighs 75 lbs. Three heats. Four feet cord and indicating snap switch on front. 1600 watts. (See note.) , Net 40.00 4861C. OVEN, Electric Drying. Inside dimensions, 15 inches wide, 18 inches deep, 11% inches high. Weighs, 76 lbs.. Same style as No. 4861B, with thermometer. Three heats. Four feet cord and indicating snap switch on front. 1600 watts. (See note) . . .Net 45.00 4862. OVEN, Electric Drying. The walls and doors have an insulation two inches thick, and the construction of the door makes it practically heat tight. It is provided with a three point switch with a current consumption of 220, 440 and 880 watts, giving a maximum temperature of 450 degrees Fahrenheit which, when once reached, may be maintained indefinitely with the switch at low heat. Inside dimensions 10%, x 11 x 9 inches. Complete with temperature indicator, attachment plug and cord. (See note,) ........ Net 16.50 4863. OVEN, Electric Drying. Of same general description as No. 4862, but of better con- struction, with nickeled legs and trim, with two heating units, one each at top and bottom, controlled by separate switches giving nine degrees of heat. The oven ia insulated so well that it has been found on a Pyrometer test that a baking tem- perature was maintained for an hour after the heat had been turned off. Maxi- mum current consumption 1750 watts. Inside measurements 18 x 12 x 12 inches. Com- plete with temperature indicator, attachment plug and cord. (See note.) Net 27.00 4863A. OVEN, Electric Drying, same as No. 4863 but with inside measurements of 18 x 18 xl2 inches. Maximum current consumption 2100 watts. (See note.) Net 35.00 Note. — In ordering state voltage desired. Unless otherwise specified ovens for 110 volt current will be sent. For full line of General Apparatus and SuppUes see Catalog M. 160 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. FREAS' ELECTRIC OVENS Approved by the National Board of Fire Underwriters. The most accurate, reliable and durable Electric Ovens on the market. The Tem- perature Control is accurate and the range permits the oven to be used for drying, incubating, sterilizing, etc. The regulation of temperature takes but a few minutes. The Temperature Range of the oven is from a degree or so above the air tem- perature to 175° C, and can be furnished for temperatures up to 500° F. The regu- lating device is sharp and accurate to within a fraction of a degree. Description. The oven is constructed of heavy asbestos board which is durable, and conserves the heat so that the current con- gumption is reduced to a minimum. The asbestos is not attacked by acids or alka- lies and can readily be cleaned by a cloth moistened in diluted aeid. The oven is fitted with aluminum racks which allow the perforated shelves to be placed at any height. The frame of the door is made of a heavy aluminum casting insulated with asbestos and is provided with a mica window, with drop down shield, which al- lows inspection of the drying chamber without opening the door; a small electric lamp in the chamber, which can be lighted at will, facilitates the inspection. Perfect ventilation to rid the chamber of fumes or moisture is obtained by openings on each side and at the top of the oven; these openings may be closed at will by means of rubber stoppers. The heating element at the bottom of the chamber is wound with high resistance wire and is easily removed if necessary. The Kegulation Device, the most important feature of the oven, is fitted into a separate compart- ment above the chamber, safe from tampering, is constructed entirely of metal substantially built and cannot get out of order. Its action depends on the expansion of a metal tube passing through the chamber and operating a lever which makes and breaks a contact that is protected from arcing. The lover extended serves as an indicator operating up and down a graduated temperature scale on the out- side of the oven. The indicator is moved to the desired temperature by simply turning the screw knob at the bottom of the scale. 4864. OVEN, Freas' Electric, No. 100, size of chamber 12 x 12 x 12 inches; mounted on cast iron base; complete with cord and plug to fit ordinary lighting circuit. (See note.) Net $ 75.00 4864A. OVEN, Freas' Electric, same as above but fitted with inside glass doors for incubat- ing purposes, which may be removed when oven is to be used at a higher tempera- ture. (See note.) Net 80.00 4864B. OVEN, Freas' Electric, No. 110, same as No. 100, but with chamber 14x17x18 inches high; mounted on heavy iron base with legs, total height 5 feet; complete with flex- ible cord and plug. (See note.) Net 175.00 4864C. OVEN, Freas' Electric, No. 112, same as No. 110, but graduated for temperatures up to 500 degrees Fahrenheit. (See note.) Net 182.00 4864D. OVEN, Freas' Electric, No. 90, size chamber 7x7x10 inches high; without window in door, lamp, or switches for current and lamp. With these exceptions the oven is the same as the ordinary Freas' oven described above. (See note.) Net 45.00 4864E. OVEN, Freas' Electric, No. 92, same as No. 90, but with glass window in door, switches and lamp. (See note.) Net 50.00 4864F. OVEN, Freas' Electric, No. 94, same as No. 90, but fitted with inside door for incu- bating purposes, which is removable. (See note.) Net 47.50 Note. — When ordering state voltage and current to be used. For full line of General Apparatus and Supplies see Catalog M, CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 163 4865. OVEN, Electric Drying, especially de- signed for moisture determinations and practically uniform in temperature, hav- ing a three point regulating switch, ■whereby the temperature can be held at 212° Fahr. Provided with top and bot- tom ventilators, which, by creating a current of hot air continually passing through the oven, greatly expedite the drying process. Made of polished steel with angle iron corner construction, and with all fittings nickel plated, has 1-ineh solid heat retaining walls of asbestos; outside dimensions, 16 inches wide, 20 inches high, and 20 inches deep; inside dimensions, 13 inches wide, 12 inches high, and 18 inches deep; maximum power consumption 250 watts; power consumption after first heating, 150 watts. With four removable screen shelves and tested thermometer. (Sec note at bottom of page) Net- $ 85.00 OVEN, Electric Drying, same as No. 4865, but with outside dimensions 14 in. wide, 16 in. high, and 18 in. deep; inside dimensions 12 in. wide, 9 in. high, and 16 in. deep; maximum power consumption, 200 watts; power consumption after first heating, 100 watts. "With three remov- . able screen shelves and tested thermometer. (See note at bottom of page.) Net 4865B. OVEN, Electric Drjring, same as No. 4865, but with outside dimensions 14 inches wide, 14 inches high, and 18 inches deep; inside dimensions 11 inches wide, 6 inches high, and 16 inches defep. "With two removable screen shelves, and tested thermometer. (See note at bottom of page.) jv^et 4865A 75.00 65.00 4866. OVEN, Electric Drying, similar to No. 4865, but with two compartments, and especially designed for moisture tests of soils. This oven was originally designed for the North Dakota Agricultural College, and has met with very favorable reception in agricultural experiment stations. Either compartment may be used separately if desired, since they, are non-interfering. Outside dimensions 50 in. wide, 24 in. high, ■ and 22 in. deep; drying space each compartment, 20 in. wide, 16 in. high, and 18 in. deep; md,ximum power consumption of each compartment 150 watts. (See note.). Net 4866A. OVEN, Electric Drying, same as No. 4866, but with three compartments, and outside dimensions 72 in. wide, 24 in. high, and 22 in. deep. (See note.) Net Note. — In ordering state voltage desired; otherwise we will send ovens for 110 volts. For full line of General Apparatus and Supplies see Catalog M. 175.00 215,00 162 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 5103. 5105. 9142. 5111. 5117. 5119. 5121. 5123. 5130. 5131. 25 .30 .09 .10 No. 9142. No. 5111. No. 5117. No. 5121. No. 5123. PENCIL, Blue, for writing on glass, porcelain, etc $ 0.17 PENCIL, Litmus, ehemically pure litmus, made like an ordinary lead pencil, one end blue, the other, end red Net PEBCOLATOBS, Oldberg's, heavy glass, narrow form, almost cylindrical. Capacity % pt. IVa pt. 21/2 pt. Each .30 .40 .50 PIPETTES, Medicine Droppers, rubber bulb, per dozen PIPETTE, Long Bulb, small PIPETTE, Long Bulb, large PIPETTES, Volumetric, accurately graduated. Capacity, c.c 1 5 10 12 n 20 Each 09 .13 .17 .20 .21 .22 PIPETTES, Mohr's, accurately graduated in 1/10 c.c. Capacity, c.c 1 2 Each 22 .27 PLATES, Glass, square, for covering beakers, etc. Size, inches Per dozen PLATES, Glass, ground on one side, for covering jars, etc. Size, inches 2x2 3x3 4x4 6x0 Each 04 .05 .06 .09 2.J .27 .37 30 .30 10 .44 50 .33 75 .40 20 .55 4x4 .27 100 .45 25 .67 200 .60 50 1.00 6x6 .55 10x10 .25 No. 5183. No. 5187. 5181. BETOBT BECEIVEBS, Glass, with tubulature only. Capacity, ounces 4 8 16 32 Each 15 .21 .27 .3Q 5183. BETOBT BECEIVEBS, Glass, with tubulature and glass stopper. Capacity, ounces 4 8 16 32 Each 25 .33 .40 .60 5185. BETOBTS, Glass, plain. Capacity, ounces 4 8 16 32 64 Each 13 .20 .25 .33 .42 5187. BETOBTS, Glass, with glass stopper. Capacity, ounces 4 8 16 32 64 Each 22 .25 .42 .50 .70 5188. BETOBTS, New Jena Glass, with tubulature and ground in stopper. Capacity, c.c 100 250 500 1000 Each 50 .60 .84 1.10 For full line of General Apparatus and Supplies see Catalog M. CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 163 No. 5193. No. 5195. No. 5189. No. 5191. 5189. RETORT, Iron, for distilling mercury, etc.; cover removable, fastened by screw elamn delivery tube reaching through the cover. Capacity, pints i/, i 2 Each $2r25 2.50 3.0C 4 4.00 5.00 5191. RETORT, Copper, for making oxygen; flask shape, with iron clamp and delivery tube Capacity, pints 1^ i 2 4 Each 2.25 2.50 3.00 3.35 5193. RETORT ADAPTERS, Glass, for connecting retorts with receivers; straight. Diameter, inches, large end 1/, 1 ly, 2 Each 15 IS .23' .40 5195. RETORT ADAPTERS, same as No. 5193; bent... .17 .20 .25 .40 No. 5201. No. 5203. 5201. RINGS, Iron, for attaching to retort stands; with improved i^e-inch screw. Diameter, inches 2 3 4 5 6 7 Each 10 .13 .16 .17 .18 .20 5203. RINGS, Iron, "Extension," for fastening to retort stand by means of Clamp Hold- ers Nos. 4723 and 4725. Diameter, inches 3 4 5 6 7 Each 09 .10 .12 .13 .15 5213. RUBBER STOPPERS, made from best quality of rubber, especially for chemical labo- ratory use, and will not harden from age. Each size furnished in three styles — solid, one hole or two hol^s. Per pound $ 1.75 Table Showing Approximate Number of Rubber Stoppers In One Pound. Number . 00 1 2 1 3 4 1 5 1 6 7 8 9 10 11 12 13 Diameter large end, mm . . . . 14 17 18 20| 23 25| 27| 32 37 41 45 50 56 65 72 Diameter small end, mm. . . 9 12 15 16| 18 20| 23| 26 30 33 37 42 50 59 68 Approximate ( Solid . . . . . 120 80 60 55| 42 33| 28| 20 15 12 11 8 6 5 4 Number in -^1 hole. . . . .|130 90! 65| 60| 45| 35| 30| 21 16 13 11 8 6 5 4 One Pound f 2 hole. . . . .|138 94| 70|.64| 47| 38| 32| 22 17 14 12 8 6 5 4 For full line of General Apparatus and Supplies see Catalog M. 164 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. .13 5/64 .22 % 5/64 .22 .30 % 5/64 .22 .33 .30 1% .40 5215. BUBBER TUBING, White, best quality, hand made, medium wall. Inside diameter, inches % A % A Thickness of wall, inches 3/64 3/64 ^ -h Per foot $0.05 .07 .10 .11 5219. RUBBER TUBING, Red, Antimony, best imported; medium wall. Inside diameter, inches % A Vi A Thickness of wall, inches 3/64 3/64 -h -hs Per foot 06 .09 .13 .17 5221. RUBBER TUBING, Black, pure gum, best imported, medium wall. Inside diameter, inches % A % A Thickness of wall, inches 3/64 3/64 A A Per foot 06 .10 .14 .18 5223. RUBBER TUBING, Band, pure gum, for Gooeh's crucibles, etc. Diameter, inches 1 Per foot 25 For other RUBBER TUBING, see Catalog M. No. 5237. No. 5239. No. 5247. 5237. SAND BATHS. Best Russia sheet iron, shallow form. Diameter, inches 3 4 5 6 Each 08 .10 .11 .15 5239. SAND BATHS. Best Russia sheet iron, hemispherical form. Diameter, inches 3 4 5 6 Each 10 .14 .15 .22 5245. SCOOPS, Horn, flat and wide, for ordinary use; square ends. Length, cm ]0 12 14 Each 18 .20 .25 5247. SCOOP, Agateware, 3x5% inches $ 0.18 For SOIL SCOOP see page 8. For SIEVES, see pages 30-1. -"^ ^,--;A:~-i?: No. 5263. No. 5271. No. 5265. No. 5273. 5261. SPATULA, Glass, 6 inch 11 5263. SPATUIiAS, Horn, double end. Length, inches 4 6 Each 09 .16 5265. SPATUTLAS, Steel, wooden handle. Length of blade, inches 3 4 5 G 8 10 Each 22 .27 .30 .42 .55 .83 527^. SPOONS, Horn, superior quality, with spatula end. Length, inches 4 6 Each 11 .17 5273. SPOON, Glass, teaspoon 2(1 5273A. SPOON, Glass, tablespoon 45 For fuU line of General Apparatus and Supplies see Catalog M. CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 165 No. 5301. No. 5303. No. 5305. No. 5307. No. 5309. 2 $0.80 5301. STOP COCKS, Glass, straight; bore, mm Each 5303. STOP COCK, Glass, three way; bore, 2 mm '. 5305. STOP COCB., Glass, three way, with three tubes; bore, 2 mm 5307. STOP COCK, Glass, one end bent; bore, 4 mm., heavy Bohemian glass 5309. STOP COCK, Glass, four way, with four tubes; bore, 2 mm m tozf r^^^^m No. 5325. No. 5327. No. 5329. No. 5330. 5325 STJPPOETS, Tripod Base of iron with coppered steel rod. ' isr 12 3 4 ^°'' small medium large ex. large lod inches :'.'.'.:.'.. 18xA 20 x 3/s 24xy2 36 x% Bod^ inches ^0 g2 gg Each 5327 STJPPOETS, Eectangular Base of iron with coppered steel rod. •NT 12 3 4 ^°- ••.■■; 4x63/ 5x8 51/2x9 6x11 Base, inches * | ^ 24xy2 36xy2 Kod inches ^>'^^ "'^ _gg .gS Each 5329. STJPPOETS (Eetort Stands), same as No. 5327, with rings. ^f-; ;■.■.■.'.■.■.■.■.■. 3, 4 in. 3, 4, 5 in. 3, 4, 5, 6 in. 3, 4, 5, 7 in. EaT .■.■.■.•.■.■.■.■.■..■.... -40 -60 -85 ^-^^ 5SS0 StJPPOETS, same as No. 5325, No. 2, with No. 5203 Extension Kings, 3, 4 and 5 inches, and 3 No. 4723 clamp holders. Complete as illustrated ^■'^ For fuU Une of General Apparatus and Supplies see Catalog M. 166 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 5347. -No. 5349. No. 5353. No. 5356A. 5347. SUPPOET, Burette, of hardwood, for two burettes, cork lined $ 1.10 5349. SUPPORT, Burette, iron tripod and rod with hardwood arm, eork lined, for two burettes 1.65 5353. SUPPOET, Burette, round hardwood base with nickel plated steel rod and revolving spring clamps for four burettes 3.35 5353A. SUPPOET, Burette, same as No. 5353, but with round porcelain base in place of the wooden base 6.25 5354. SUPPOET, Burette, same as No. 5353, for two burettes 4^00 5354A. SUPPOET, Burette, same as No. 5354, but with round porcelain base in place of the wooden base 4.5O 5356A. SUPPOET, Burette, improved design. Base of polished hardwood with rectangular piece of white glass on top. Rod and all metal parts of brass. The spring which holds the burettes in position is readily released, permitting of rapid changing and shifting of burettes, which are held rigidlj parallel to each other. Without burettes 2.50 No. 5375. 5375. 5377. 5378. 5379. 5381. No. 5377. No. 5378. SUPPOET, Test Tube, for 6 tubes. Heavy base with drying pins. SUPPOET, Test Tube, for 10 tubes. Heavy base with drying pins. SUPPOET, Test Tube. Designed by Prof. H. E. Grifath of Knox College. Has 10 holes for test tubes % inch in diameter and 2 for test tubes 1 inch in diameter; has 12 drying pins. A valuable feature of this support is a trough at the foot of the drying pins for receiving drainage. This trough may also be used for holding tubes and stirring rods : SUPPOET, Test Tube, for 13 tubes. Two rows of holes with drying pins.". ! SUPPOET, Test Tube, for 25 tubes. As used at the University of Chicago. Two rows of holes with drying pins .45 .42 .67 No. 5383. 5382. SUPPOET, Test Tube, without glued joints, shipped "knocked down" with directions for putting together; for 16 tubes, with 8 drying pins 5383. SUPPOET, Test Tube, of wire. Will hold 40 tubes. Size 9% inches long by 414 inches wide by 3% inches high '.". For full line of General Apparatus and. Supplies see Catalog M. .50 .33 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 167 No. 5401. 04; per quire $ 0.67 04: per quire. 4xy, .20 1.90 7x% .40 3.80 5 .60 5xy2 .22 2.00 8x1 .45 5.00 6 .75 5x% .25 2.25 10x1 .80 9.00 8 1.00 No. 5395. 5102D.TEST PAPER, Litmus, blue, per sheet, 5102E.TEST PAPER, Litmus, blue, per book. 5102H. TEST PAPER, Litmus, red, per sheet, 5102 J. TEST PAPER, Litmus, red, per book For LITMUS PENCIL see page 162. 5395. TEST TUBES, well annealed, free from lead. Size, inches 3x% Per dozen 15 Per gross 1.45 Size, inches 6x% Per dozen 30 Per gross 2.75 5401. TEST TUBES, Side NecK. Length, inches Per dozen 5403. TEST TUBES, Ignition Tubes, of Bohemian combustion tubing. Size, mm ' 100x14 130x16 Per dozen 80 .90 5404. TEST TUBES, Ignition Tubes, of Jena combustion tubing. Size, mm 140x15 Per dozen -95 5405. TEST TUBES, Ignition Tubes, heavy hard glass. Length, inches 4 Per dozen 45 For TEST TUBE BRUSHES, see page 138. For TEST TUBE HOLDERS, see page 143. 5407. THERMOMETER, Chemical, enclosed paper scale, tube 200x7 millimeters; graduated to 110 degrees C 5408. THERMOMETERS, Chemical, enclosed hand written scale, 325x7 millime- ters, in wood case. Centigrade scale — 10 to HO Price, each -"O 5408A. THERMOMETERS, Chemical, same as No. 5408, but with Fahrenheit aeale 17 to 220° 17 to 400° Price, each • •• • -60 -80 5408B. THERMOMETER, Chemical, same as No. 5408, with double scale; — 10 to 110° C. and 17 to 220° F • ■ • • 5409. THERMOMETERS, Chemical, scale engraved on stem, white enameled back, 325 X 7 millimeters. Centigrade scale —10 to 110° —10 to 210° Price, each 90 1.10 5409A THERMOMETERS, Chemical, same as No. 5409, but with Fahrenheit scale 17 to 220° 17 to 400° 17 to 600° Price, 'each 90 1.10 1.33 5409B THERMOMETER, Chemical, same as No. 5409, with double scale; — 10 to 110° C. and 17 to 220° F For full line of General Apparatus and Supplies see Catalog M. 5 .67 6x% .28 2.50 12x1 1.25 12.00 10 1.65 160 X 20 1.25 160 X 18 1.12 6 .80 -10 to 210° .80 —10 to 360° 1.33 .06 .67 .06 I .40 .80 1.40 16S CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. Nos. 5431 and 5434. Nos. 5432 and 5436. 5418. 5418A. 5418B. 5418C. 5431. 5432. 5434. 5436. Double bend, 9-iucli $ 0.22 " " " 33 35 45 5438. 5439. 5440. 5442. 5444. 5446. 5463. 5465. 5467. 5469. 5471. £473. 5474. TONGS, CEUCIBLE, Steel. TONGS, CEUCIBLE, SteeL Double bendi 9-incli, nickel plated TONGS, CRUCIBLE, Brass. Double bend, 9-inch TONGS, CRUCIBLE, Brass. Double bend, 9-incli, nickel plated TRIANGLES, Iron Wire, plain. Number Length of side, inside, inches Per dozen TRIANGLES, Pipe Stem, of iron wire, covered with pipe stems. Number 1 Length of side, inside, inches IM; Per dozen .03 TRIANGLES, Nichrome Wire, melting point about 3000° P., non-eorrodible one-sixteenth that of platinum and last longer in service. Number 1 Length of side, inside, inches IM: Each 11 TRIANGLES, Nichrome Wire, covered with Fused Silica Tubes, a late product, supe- rior to any triangle yet produced. Number : 1 2 3 4 Length of side, inside, inches 1% 2 2% 3 Each Not .25 .25 .35 .40 1 1% .42 2 .63 2 2 .11 2 2 .45 3 .67 3 .45 4 3 .80 cost but 3 2% .13 4 3 13 No. 5440. Nos. 5442-5446. No. 5463. 10 .55 10 5 .75 12 .75 12 6 1.00 TRIPOD, Iron, small, for spirit lamps TRIPOD, Iron, for Bunsen burners, single ring. Diameter, inches 5 6 8 Each 22 .30 .42 TRIPOD, Iron, malleable, same as No. 5439, with concentric rings. Diameter, inches 5 g Number of rings 2 3 4 Each .■ .28 .40 .50 TROUGHS, Pneumatic, of japanned tin with sliding shelf and overflow: students size, 4% X 6% X 10 inches TROUGHS, Pneumatic, of heavy japanned tin with sliding shelf and overflow, xiix 16 inches , TROUGHS, Pneumatic, heavy galvanized iron with 'sliding 'shelf and 'overflow, '5x9x 12 inches TUBES, CONNECTING, U Shape, of glass. Size, inches Each TUBES, CONNECTING, Y Shape, of glass. TUBES, CONNECTING, T Shape, of glass. TUBES, CONNECTING, Y Shape, of brass. Size, inches Each TUBES, CONNECTING, T Shape, of brass. TUBE, CONNECTING, Y Shape, of lead, % inch TUBE, CONNECTING, Y Shape, of hard rubber, % i'nch.'.V.V.'.'.'.'.'.'.'..' .' .' ! ! ! For full line of General Apparatus and Supplies see Catalog M. .22 .55 1.45 % .08 .08 .08 .27 .27 % .12 .12 .12 .33 .33 1/2 .17 .17 .17 % .40 .40 .10 CENTRAL SCIENTIFIC CO., CniCAGO, U. S. A. 109 5581. 5585. 5587. No. 5585. pi! No. 5581. WASTE CAN, galvanized, 14 x 14% inches; capacity, 9% gallons; with gcamloss cover fitting over outside For WASTE JABS see page 152. WATCH GLASSES, best imported glass, well annealed, edges ground, used for cover- ing beakers, etc. Diameter, inches 1% 2 2% 3 3% 4 5 6 Per dozen 22 .25 .50 .57 .75 .84 1.50 2.50 WATCH GLASSES, counterpoised, for use on analytical balances; 2, 2% or 3-inch. Per pair $ 1.10 No. 5591. No. 5593. 5591. WATER BATHS, polished copper, tin lined, concentric copper rings and cover, handles and steam escape. Diameter, inches 4 ^ ^ ^ ■ Number of rings 3 . 4 5 Each "^ 1-1^ ^-^^ 5593. WATEE BATHS, polished copper, same as No. 5591, with constant water level. Diameter, inches ^ Number of rings Each 1.90 6 2.25 6 2.80 5601. 5602. 5603. .67 WATER BATH, of heavy polished copper, tin lined, 14 inches square, 5 inches deep, with four openings 5 inches in diameter, provided with rings and cover. Has a fitop cock to draw off the water, Kekule's water level regulator, and an extra sheet iron bottom,' and is mounted on a separate support ■ • ■ • l^-^o WATEE BATH, like No. 5601, 23xl3%x5 inches with'seven openings, three ot b ■ inches diameter and four of 4 .inches diameter, with rings and cover ; . . . WATER BATH, same as No. 5602, but arranged with coil for heating with steam For full line of "General Apparatus- and Supplies see Catalog M. 19.00 22.60 170 cp:ntral scientific co., Chicago, u. s. a. MISCELLANEOUS SUPPLIES EMERGENCY INSTRUCTIONS No. 6300. 6201. 11001, 6300. 3380. 3381. 6204. . 6209. ASBESTOS PLATES or PADS, iron bound edges, diameter 8 inches. Each BLOTTERS, good weight, best quality, 4 x 9i/4 inches. Per 100 sheets CABINET, First Aid. A neat hardwood case, 8 x 12 x 3% inches deep, containing the following: 1 Gauze Bandage, 1 inch; 2 Gauze Bandages, 2 inch; 1 Cotton Bandage, 2 inch; 1 can Mustard (specially prepared for emetics); 2 packages Absorbent Cotton; 1 package Styptic Gauze (medicated, to stop bleeding); 1 package Surgical Gauze (plain, for pads and compresses) ; 1 Tourniquet (to stop arterial bleeding) ; 1 can Pow- dered Antiseptic Soap (for washing hands and wounds) ; 1 can Eecrosco Ointment (for burns, scalds, cuts, etc.) ; 1 can Kapsikar Embrocation (for use as counter-irritant for sprains, strains, congestion, etc.); 1 package Court Plaster; 3 Safety Pins; 1 envelope Hooks and Eyes (to hang case on wall). An excellent cabinet to have about the labor- atory for treating cuts and burns Net CANDLES, Faraffine, twelve to pound. Per dozen CANDLES, Paraffins, six to pound. Per dozen CEMENT, Quixo, a chemically true cement, which hardens as it dries and when dry is not affected by fire or water. It will join anything to everything, with the exception of India rubber, vulcanite, celluloid and black lead. Per 6 ounce can Net CHAMOIS SKINS, for cleaning instruments, etc. Size, inches 0x8 9x11 10x13 14x18 Each .09 .17 .22 .45 0.06 .25 6205. CHEESE CLOTH, best quality. Per yard 6215. CLOTH, Emery. No 000 Per sheet 10 Per quire 1.20 11003. CLOTH, Tracing, thin, best quality. Width, inches 30 36 Per yard 45 .50 6219. CORD, Mason's Chalk Line, ^ inch. Per hank of 20 feet 6221. COED, Clothes Line, % inch. Per 100 feet 6225. COED, "White Cotton, % inch. Per hank of 50 feet 00 .10 1.20 38 .61 .10 1.20 42 .66 1 .10 1.20 48 .90 2 .10 1.20 54 .95 2.50 .18 .33 .25 .08 .06 1.10 .30 For fuU line of General Apparatus and Supplies see Catalog M. CENTRAL iSCIBNTIFIG CO, CHICAGO, TJ. S. A. 17 MISCELLANEOUS SUPPLIES— Continued No. 6241. No. 6247. 8091. 8091A, 6241. Can- 8oz. .40 lib. .65 FRUIT JARS, "Lightning" SeaUng. Per dozen, pint, $1.50: quart .FRUIT JARS, Mason. Per dozen, pint, 0.75; qu'art, 0.85; two-quart.. GLUE, LePage's. , Bottle , , ^i^s Small. Large. 2 oz. 4 oz. Each 15 .22 .oy .gg 6243. GLUE, Marine, -waterproof, for projection cells, etc., per ounce bottle. . 6247. LIBRARY PASTE, Sanford's Best. ^tyls Largo Collapsible Tube. 4 oz. Screw Cap Jar. Each .15 .15 6256. MATCHES, Swedish Safety, in cartons of 12 boxes, per carton 6266. PAPER, Carborundum. No 000 00 1 Per sheet .05 .05 .05 .05 Per quire ; .65 .65 .65 .65 6265. PAPER, Emery,- French. No 000 00 1 Per sheet .Q5 .05 .05 .05 Per quire 1.00 1.00 1.00 1.00 6269. PAPER, Sand. No 00 1 2 3 Per sheet 03 .05 .05 .05 .05 Per quire 30 .30 .30 .30 .30 PENCILS, Drawing, Faber's No. 4 11. Per dozen PENCILS, Drawing, Faber's No. 6 11. Per dozen RUBBER BANDS, assorted, in ^4 pound boxes RUBBER CEMENT, for cementing rubber joints, rubber, etc., per ounce bottle For SAND PAPER see above. SEALING WAX, best red, four sticks to the pound, per pound SOLDER, Stick Form, weight 2 pounds. Per stick SOLDER, Wire Form. Per pound. SOLDER, Wire Form, resin center. Per pound SPLINTS, 100 in package. Per package Net SPONGES, for cleaning purposes, 16 to a pound. Per pound TAGS, Brass, % inch diameter, numbered. Per dozen TOWELING, Crash, good quality, 17 inches wide. Per yard Per 50 yard bolt TUMBLERS, Jelly, with cap cover, 200 c.e. capacity. Per dozen TWINE, Cotton. Per ball. TWINE, Linen. Per ball. WAX TAPERS. Per box WIRE, Annealed Steel. Stubb's Gauge No 18 20 22 24 Per 4 ounce spool .14 .15 .16 .16 WIRE, Steel Picture. No 1 2 Per package, 15 yards .08 .10 .11 For full line of General Apparatus and Supplies see Catalog M. 8119. 8120. 6272. 6273. 6275. 508. 509. 509 A. 6289. 6291. 6293. 6298. 8128. 6298A. 6298B. 6299. 6131. 6127. 1.65 1.10 .27 .11 1.25 1.25 1.50 .15 .44 .85 .40 .60 .10 2.20 .40 .14 5.50 .55 .11 .40 .11 3 72 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. BOOKS ON AGRICULTURE THE SCIENCE OF RURAL BUSINESS FARM MANAGEMENT. Net. Farm Management, F. W. Card $ 2.00 Farm Management, C. W. Pugsley 1.50 Farm Management, G. F. Warren, Prof. Farm Management, Cornell 1.75 Lalioratory Exercises in Farm Manage- ment. G. F. Warren and K. C. Liver- more SO Farm Development, W. M. Hays 1.50 CO-OPERATION. Co-operation Among Farmers: The Key- stone of Rural Prosperity, J. L. Coulter. 1.00 Co-operation in Agriculture, G. H. Powell. 1.50 How to Co-operate, Herbert Myriek 1.00 Co-operative Finance, Herbert Myriek 2.50 BOOKKEEPING. Net. Bookkeeping for Farmers, T. C. Atkeson. . $ 0.25 Systematic Bookkeeping for Fanners, F. M. Baird l.QO Farmer's Business Handbook, The, I. P. Roberts, Prof. Agr., Cornell 1.2,1 Farm Accounting, 2 Vols., Bextell 3.00 Farm Accounts, J. A. Vye 1.50 How to Keep Farm Accounts, Steiner 1.00 ECONOMICS— LAW. Principles of Rural Economics, T. N. Car- ver, Prof. Pol. Econ., Harvard Univ. . . . 1.30 An Introduction to the Study of Agricul- ture Economics, H. C. Taylor, Prof. Agr. Eeon., Univ. of Wis 1.25 Law for the American Farmer, J. B. Green, New York Bar 1.50 Farmer's Manual of Law, H. B. Willis 2.00 AGRICULTURAL CHEMISTRY Net. Analytical Chemistry, P. P. Treadwell $ 3.00 The Chemistry of Plant and Animal Life, Harry Snyder 1.50 Exercises in Elementary Quantitative Chemical Analysis for Students of Agr., A. T. Lincoln and J. H. Walton, Jr., for- merly of Univ. of 111 1.50 Net. Agricultural Chemistry, Ince and Totting- ham, in prepr. Chemistry of Agriculture, Stoddard, in prepr. Chemistry in Its Relation to Daily Life, Hart and Kahlenberg $ 1.25 General Agricultural Chemistry, Hart and Tottingham 1.50 AGRONOMY MANURES AND SOIL FERTILITY. Net. Bone Products and Manures, Thomas Lam- t>e''t $ 3.00 Book of Rothamstead Experiments, The A. D. Hall 3.75 Farmers of Forty Centuries, P. H. King. . 2!50 Farm Maniires, C. E. Thorne 1.50 Fertility and Fertilizer Hints, J. E. Halli- gan, Chemist, La. St. Exp. Sta 1 23 Fertility of the Land, The, I. P. Roberts, Emeritus Prof. Agr., Cornell 1.50 Fertilizers: The Source, Character and Composition of Natural, Home-Made and Manufactured Fertilizers, Etc., E. E. Voorhees, ex-Direetor N. J. Agr. Exp. Sta 1 25 Fertilizers and Crops, L. L. Vanslyke 2.50 Fertilizers and Manures, A. D. Hall 1.50 Manures and Fertilizers, H. J. Wheeler, Agr. Expert Am. Agr. Chem. Co .' 1.60 Manures, Talks on, Joseph Harris 1.50 Principles and Practice of Agr. Chemical Analysis, Vol. I, Soils, H. W. Wiley 4.00 Principles and Practice of Agr. Chemical Analysis, Vol. II. Fertilizers and Insect- icides, H. W. Wiley 4.50 Principles and Practice of Agr. Chemical Analysis, Vol. III. Agr. Products, H. W Wiley 6.00 Net. Principles of Agricultural Chemistry, G. S. Fraps, Prof. Agr. Chem., Texas Agr. Coll.$ 4.00 Soil, The, A. D. Hall 1.50 Soils, S. W. Fletcher 2.00 The Story of the Soil, C. G. Hopkins 1.50 First Principles of Soil Fertility, Alfred Vivian, Ohio State Univ 1.00 Soil Fertility and Permanent Agriculture, 0. G. Hopkins, Prof. Agronomy, Univ. of 111 2.25 Soil FertiUty and FertiUzers, J. E. Halli- gan, Chemist, La. St. Exp. Sta 3.50 Soil FertiUty Laboratory Manual, C. G. Hopkins and J. H. Pettit, Univ. of III.. .60 Soil Solution, The, F. K. Cameron, U. S Dept. of Agr 1.25 Soils and Fertilizers, Harry Snyder, for- merly Prof, of Agr. Chem. and Soils, St. Paul, Minn 1.25 Soil Conditions and Plant Growth, E. J. Russell, Rothamstead 1.50 WEEDS. Common Weeds of the Farm, H. C. Long. 2.00 Quack Grass Eradication, P. B. Crane 1.00 Weeds and How to Eradicate Them, Thomas Shaw :'. 50 Weeds of the Farm and Garden, L. H. Pammel 1.50 Weeds, Ada E. Georgia 2.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 173 AGRONOMY— Continued FARM CROPS. Net. Alfalfa, The Book of, F. D. Coburn $ 2.00 Alfalfa, Joe Wing 2.00 Alfalfa, F. D. Coburn 50 Broom Corn Culture, A. G. MeCall 50 The Cereals in America, T. F. Hunt 1.75 Clovers and How to Grow Them, Thomas Shaw : 1.00 The Study of Corn, V. M. Shoesmith 50 Com Book, M. L. Bowman and B. W. Crossley, formerly of Iowa St. CoUege.. 2.00 Corn Culture, C. S. Plumb ; 1.00 The Book of Corn, Herbert Myriok 1.50 Corn Judging Manual, A. D. Shamel 50 Com Plants, Sargent 1.75 Crops and Methods for Soil Improvement, Agee 1.25 Crop Rotation and Pield Management, E. C. Parker 1.50 The Knapp Method of Growing Cotton, H. E. Savely and W. B. Mercier 1.00 Examining and Gradi..g Grains, T. L. Lyon and E. Gr. Montgomery, Cornell ... .60 Farm Grasses of the U. S. of America. W. J. Spillman 1.00 Feeding of Crops and Stock, A. D. Hall. . . 1.50 Field Crops, A. D. Wilson, Uuiv. of Minn., and C. W. Warburton, U. S. Dept. of Agr 1.50 Flax Culture 30 The Forage and Fibre Crops, T. F. Hunt. . 1.75 Text Book on Forage Crops, C. V. Piper, U. 8. Dept. of Agr 1.75 Forage Crops, E. B. Voorhees, ex-Direetor N. J. Agr. Exp. Sta 1.50 Forage Crops Other Than Grasses, Thomas Shaw 1-00 Grasses and How to Grow Them, Thomas Shaw 1-50 How Crops Feed, S. W. Johnson 1.50 How Crops Grow, S. W. Johnson 1.50 Peas and Pea Culture, G. C. Levey 50 Net. The Potato, E. H. Grubb $ 2.00 Small Grains, M. A. Carleton, Cerealist of U. S. Dept. of Agr., in prcpr. Southern Field Crops, J. F. Duggar, Direct- or Ala. Exp. Sta 1.75 Spraying Crops, 0. M. Weed 50 Soiling Crops and the Silo, Thomas Shaw. . 1.50 Story of a Grain of Wheat, W. C. Edgar. i.lO Sugar-Beet, L. S. Ware 3.50 Wheat Culture, D. S. Curtis 50 The Book of Wheat, P. T. Dondlinger 2.00 SOU, PHYSICS. Physics of Agriculture, F. H. King 1.75 Physical Properties of the SoU, , Robert { Warrington 1.50^ Physical Properties of Soils, A. G. McCall. . .50 Principles of Soil Management, T. L. Lyon and E. O. Fippin, Cornell 1.75 Rocks, Rock-Weathering and Soils, G. P. Merrill, Head Curator Geology, U. S. Nat. Museum 4.00 Sou Culture Manual, H. W. Campbell 2.50 Soils: Their Formation, Properties, Compo- sition, Etc., B. W. Hilgard, Emeritus Prof. Agr., TJniv. of Cal 4.00 The Soil: Its Nature, Relations, and Fund- amental Principles of Management, F. H. King, formerly Prof. Agr. Physics, Univ. of Wis ■. 1.50 Soil Physics Laboratory Majiual, J. G. Mosier and A. F. Gustafson, Univ. of 111. .60 Soil Physics Laboratory Guide, Stevenson and Sohaub 50 Soil and Crops of the Farm, G. E. Morrow and T. F. Hunt 1.00 Soil of the Farm, The, John Scott and J. C. Morton 1-00 Soil Management, F. H. King 1.50 DRY FARMING AND IRRIGATION Net. Dry Farming, John Widtsoe, Pres. Agr. Coll. Utah $ 1-50 The ConpLuest of Arid America, W. E. Smythe 1-50 Dry Farming, William Maedonald 1.20 Arid Agriculture, B. C. Buflfum 1.50 Irrigation, John Widtsoe l-7'5 Net. Irrigation and Drainage, King $ 1-50 Irrigation Farming, L. M. Wilcox 2.00 Irrigation for Farm Gardening Orchard, Henry Stewart 1-00 Irrigation Institutions, Elwood Mead, U. S. Dept. Agr 1-25 ANIMAL HUSBANDRY GENERAL. Net. Animal Competitors, IngersoU $ 1-00 Cattle, Sheep and Pigs: Their Practical Breeding and Keeping, F. T. Barton 3.00 Cyclopedia of Live Stock, Farmer's, Wil- cox and Smith 4.50 Domesticated Animals and Plants, Eugene Davenport, Dean Coll. Agr., Univ. of HI. 1.25 Farmer's Cyclopedia of Live Stock, E. V. Wilcox and C. B. Smith 4.50 Net. Farm Animals, E. V. Wilcox $ 2.00 Farm Animals, E. V. Wilcox 2.00 Farm Live Stock of Great Britain, Robert Wallace 5,00 Judging Live Stock, J. A. Craig 1.5C Private Herd Register ..■ 2.00 Profitable Stock Raising, C. A. Shamel. . , . 1.50 Study of Breeds, The, Thomas Shaw 1.50 Types and Breeds of Farm Animals, C- S. Plumb, Prof. An. Husbandry, O. S. U... 2.pC 174 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. ANIMAL HUSBANDRY— Continued FEEDING. Net. Beef Production, H. W. Mumford, Prof. An. Husbandry, Univ. of HI $ 1.50 Cattle Feeding with Beets, Ware 2. .50 Elementary Treatise on Stock Feeds, J. E. Halligan, Chemist, La. St. Exp. Sta 2.50 Feeding Animals, E. W. Stewart 2.00 Feeding Farm Animals, Thomas Shaw 2.00 Feeding of Animals, The, W. H. Jordan, Director N. Y. Agr. Exp. Sta 1.50 Feeding of Crops and Stock, Hall 1.50 First Principles of Feeding Farm Animals, C. W. Burkett 1.50 Feeds and Feeding, W. A. Henry, formerly Dean Coll. Agr. Wis., Madison, Wis 2.25 Iiittle Sketches of Famous Beef Cattle, Plumb 60 Management and Feeding of Cattle, The, Thomas Shaw 2.00 Principles of Animal Nutrition, The, H. P. Armsby, Director Pa. St. Agr. Exp. Sta. 4.00 Productive Feeding of Farm Animals, Well 1.50 Profitable Stock Feeding, H. E. Smith 1.50 Silos, Ensilage and Silage, Manly Miles. . . .50 HOBSES. American Gentleman's Stable Guide, B. Mc- Clure 1.00 American Horses and Horse Breeding, John Dimoh 3.50 American Thoroughbred, The, C. E. Treva- than 2.00 American Trotting and Facing Horse, The, H. T. Coats 75 Art of Horseshoeing, The, William Hunt- ing 1.00 Breaking and Training of Horses, The, M. W. Harper, Asst. Prof. An. Hus- bandry, Cornell 1.75 American Reformed Horse Book, G. H. Dadd 2.00 Family Horse, The, G. A. Martin 1.00 First Hand Bits of Stable Lore, F. M. Ware 2.00 Hints to Horse Keepers, H. W. Herbert. . . 1.50 Horses and Practical Horse Keeping, F. T. Barton 3.50 Horse, The, I. P. Roberts, Emeritus Prof. Agr., Cornell 1.25 Horse, The, David BufEum 1.50 Horse, The, William Youatt 1.00 Horse, The, F. T. Barton 1.00 Horse in America, The, J. G. Speed 2.00 Horse Book, The, J. H. S. Johnstone 2.00 Horse, The, How to Buy and Sell, Peter Howden 1.00 Horse, in the Stable and in the Field, The, Stonehenge 1.00 Horses, Horsemen and Stable Management, Godfrey Bosville 2.00 Horse Sense, Dr. Curryer 1.00 Horses' Teeth, Clarke 2.50 How to Judge a Horse, F. W. Bach 1.00 Management and Breeding of Horses, M. W. Harper 2.00 Fercheron Horse, The, M. C. Weld 50 Net. Practical Horse Keeper, The, George Flem- ing $0.75 Productive Horse Husbandry, C. W. Gay, Prof. An. Husbandry, Univ. of Pa 1.50 Biding and Driving, E. L. Anderson and Price Collier 2.00 Saddle Horse, The 1.00 Stallion Service Account Book, F. A. Glos .80 Standard Horse Book, Wagner 4.00 Standard Horse and Stock Book, Wagner. 2.00 Training and Breaking of Horses, Harper. 1.75 Training Trotting Horses, Charles Marvin 3.50 Trotting and Pacing Horse in America, The, Hamilton Busbey 2.00 Trotting Horse in America, The, Hiram Woodrufe 1.00 Youatt and Spooner on the Horse, H. S. Randall l.Ou POULTRY. American Poultry Culture, jl. B. Sando 1.50 American Standard of Perfection 2.00 Book of Pigeons, R. Pulton 5.00 California Poultry Culture, Mrs. 0. H. Burbridge 1.00 Capons and Caponizing, George Dow 50 Chicks, Hatching and Rearing, H. A. Nourse 25 Common Sense in the Poultry Yard, J. P. Haig 1.00 Common Sense on Poultry Raising, Mrs. B. F. Wileoxen 75 Diseases of Poultry, D. E. Salmon 1.00 Egg Money and How to Increase It, H. A. Nourse 25 Farm Poultry, G. C. Watson, ex-Prof, of Agr., Penn. State. . . . ., 1.50 How to Keep Hens for Profit, C. S. Val- entine 1.50 Incubation of Eggs, W. C. Schurman 1.50 Illustrated Book of Domestic Poultry, Mar- tin Doyle 2.50 Illustrated Standard of Perfection 1.50 Kellerstrass Poultry House Plan Book 2.50 Leghorns, The I.OO Perfected Poultry of America, T. F. Mc- Grew and G. E. Howard 2.50 Philosophy of Judging, Feleh, Babeock and Lee ; 1.00 Plymouth Rocks, T. F. McGrew 1.00 Poultry Feeding and Fattening, G. B. Piske 50 Poultry Architecture, G. B. Fiske 50 Poultry Appliances and Handicrafts, G. B. Fiske 50 Poultry Laboratory Guide, H. R. Lewis, Prof. Poultry Husbandry, Baron de Hirsch Agr. College 65 Poultry Manual, The, F. L. Sewell and Ida E. Tillson 50 Poultry Houses, Coops and Equipment, H. A. Nourse 25 Poultry Text Books, F. C. Doolittle 2.00 Poultry Keeping as an Industry, Edward Brown 2.00 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 175 ANIMAL HUSBANDRY— Continued POULTRY— Continued. Net. Poultry Foods and Feeding, Laurie Price. .$ 1.00 Poultry Culture, I. K. Feleli 1.50 Poultry Breeding, Purvis 1.50 Poultry Book, The, Johnson and Brown. . . 5.00 Poultry Book, The, Harrison Weir 1.50 Practical Poultry Keeper, Lewis Wright. . 1.25 Principles and Practice of Poultry Culture, J. H. Bobinson, Editor Farm Poultry. . . 2.50 Productive Poultry Husbandry, H. R. Lewis, N. J. Exp. Sta 2.00 Profitable Poultry Production, M. G. Kaina 1.50 Progressive Poultry Culture, A. A. Brig- ham, Agr. Coll., Storrs, Conn 1.50 Baces of Domestic Poultry, Edward Brown 2.00 Bacban's Poultry Directory 1.00 Rhode Island Reds, How to Breed and Judge Them, Theo. Hewes 1.00 Squabs for Profit, W. E. Eiee and W. E. Cox 50 Standard Wyandottes In Colors, and How to Judge Them, Theo. Hewes 1.00 Steams' Model Poultry Account Book. . . . 2.00 Successful Poultry Culture, Clarence Ward 1.00 System in Poultry Practice, James Shack- leton 1.00 Turkeys, Ducks and Geese, H. A. Nourse and G. H. Pollard 50 Turkeys, How to Grow Them, Herbert Myrick 1.00 Wyandottes, The, J. H. Drevenstedt 1.00 SWINE. Harris on the Pig, Joseph Harris 1.00 Hog Book, The, Dawson 1.50 Productive Swine Husbandry, G. E. Day, Prof. An. Husby., Ontario Agr. Coll 1.50 Swine Husbandry, F. D. Coburn 1.50 Swine In America, F. D. Coburn 2.50 Swine, William Dietrich, formerly of Univ. of HI 1.50 SHEEP— GOATS. Net. The American Merino, Stephen Powers $ 1.50 Management and Feeding of Sheep, Thomas Shaw 2.00 Modem Sheep, Breeds and Management, W. J. Clarke 1.50 Productive Sheep Husbandry, W. C. CofEey, Prof. Sheep Husbandry, Univ. of 111., in prepr. Sheep Feeding and Farm Management, D. H. Doane, Prof. Farm Management, Univ. of Mo 1.00 Sheep Management, Frank Kleinheinz, Agr. Coll., Madison, Wis 1.50 Sheep and Their Diseases, W. A. Bush- worth 1.50 Sheep Farming In America, J. E. Wing. . . . 1.00 Sheep Farming, Craig and Marshall 1.50 Sheep, The Domestic, Henry Stewart 1.50 Shepherd's Manual, Henry Stewart 1.00 Angora Goat Raising and IMllch Goats, G. F. Thompson 1.00 Angora Goat, The, Shreiner 3.00 Raising Angora Goats, W. L. Black 3.00 BEES. Advanced Bee Culture 1.25 Bee Keeper's Guide, The, A. J. Cook 1.25 Bee People, The, Margaret W. Morley 1.50 Fifty Years Among the Bees, Miller 1.00 Forty Years Among the Bees, C. C. Miller 1.00 Honey Bee, The, T. W. Cowan 1.00 Honey Makers, The, Margaret W. Morley 1.25 How to Keep Bees, A. B. Comstock. . . 1.00 How to Keep Bees for Profit, D. E. Lyon. . 1.50 Iiangstroth on the Honey Bee, Dadant and Lon 1-25 Life of the Bee, Maurice Maeterlinck. . . . 1.40 Manual of the Apiary, A. J. Cook 1.30 Modem Bee Farm, S. Simmins 2.00 Mysteries of Bee Keeping Explained, Boot 1.00 Qulmby's New Bee Keeping, L. C. Boot. . . 1.00 Queen Bearing, G. M. Doolittle 1.00 VETERINARY SCIENCE AND PRACTICE GENERAL. Net. American Horse, Cattle and Sheep Doctor, McClure $ 1.25 Animal Castration, A. Liautard 2.00 Care of Farm Animals, Mayo 1.50 Diseases of Animals, The, N. S. Mayo 1.50 Diseases of Live Stock, Miller and Tellor. 2.50 Farmers' Veterinary Adviser, James Law. 3.00 Manual of the Practice of Veterinary Med- icine 2.75 People's Horse, Cattle, Sheep and Swine Doctor 1-00 Veterinary Anatomy, Sisson 7.00 Veterinary Medicines, Dun 3.75 Veterinary Science, Hodgins and Haskett. 2.00 Veterinary Studies, M. H. Reynolds 1.75 CATTLE. Net. American Cattle Doctor, The, G. H. Dadd.$ 2.00 Bovine Obstetrics, De Bruin 5.00 Cattle Tuberculosis, Sessions 1.00 HORSES. Exercises in Eptulne Surgery, Cadiot 2.50 Modem Horse Doctor, G. H. Dadd 1.00 Diseases of the Horse and How to Treat Them, B. Chawner 1.25 Manual of the Treatment of Lameness In the Horse, Chapman 2.00 Lameness of the Horse, W. E. A. Wyman. 2.50 SHEEP— SWINE. Sheep and Their Diseases, W. A. Bush- worth 1.50 Diseases of Swine, D. Mcintosh, Univ. of HI 2.00 Diseases of Swine, B. A. Craig 75 176 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. GENETICS GENERAL. Net. Origin of Species, Darwin $ 2.00 Genetics, An Introduction to the Study of Heredity, H. E. Walter 1.50 Heredity; A Psychological Study, Ribot, . . 2.00 Mendel's Principles of Heredity, Batcaon. 3.50 Mendelism, Punnett 1.2o Survival of the Unlike, The, L. H. Bailey, formerly of Cornell 2.00 Varieties in Animals and Plants, H. M. Vernon 1.75 ANIMALS. Animal Breeding, Thomas Shaw l..')0 Breeding of Farm Animals, Maishall 1.50 Cattle Breeding, William Warfleld i Principles of Breeding, Eugene Davenport, Dean and Director Coll. Agr., Univ. of 111. Stock Breeding, Manly Miles Study of Breeds, The, Thomas Shaw PLANTS. New Creations in Plant Life, W. S. Har- wood Evolution of Our Native Fruits, Bailey, formerly of Cornell Origin of Cultivated Plants, A. DeCandoU Plant Breeding, L. H. Bailey L. H. Net, 1 2.00 2.50 1.50 1.50 1.7a 2.00 2.00 1.25 AGRICULTURAL ENGINEERING BUILDINGS. Net. Barn Plans, William Radford $ 1.00 Barn Plans and Out Buildings, E. C. Powell 1.00 Farm Buildings, Breeder's Gazette 2.00 Farm Buildings, J. S. Scott. 80 Farm Structures, K. J. T. Ekblaw, Associ- ate in Farm Buildings, Univ. of 111 1.75 DRAINAGE. Engineering for Laud Drainage, C. G. Elliott 2.00 Draining for Profit and Draining for Health, G. E. Waring, Jr 1.00 Farm Drainage, Judge French, New Hamp- shire 1.00 Land Draining, Manly Miles 1.00 FARM ENGINES. Farm Gas Engines, H. R. Brate 1.00 Gas Engines for the Farm, C. F. Hirsh- field and T. C. Ulbricht 1.50 Gas Engine, The, A. H. Goldingham 1.50 Gasoline Engine on the Farm, Z. W. Put- nam 2.50 Gas Engine Troubles and Remedies, A. titrit- matter 1.00 Farm Engines and How to Run Them, J. H. Stephenson 1.00 Modern Gas Tractor, V. W. Page 2.00 Traction Farming and Traction Engineer- ing, J. H. Stephenson 1.50 MECHANICS. DAIRY HUSBANDRY GENERAL AND CATTLE. Net. American Dairying, H. B. Gurler $ 1.00 Book of the Dairy, Fleischmann 4.00 Business of Dairying, The, G. B. Lane. . . . 1.25 Common Sense Ideas for Dairymen, G. H. Black 1.00 Dairy Technology, C. Larsen, S. Dak. Agr. Coll., and William White, Manhattan, Kan - 1.50 Dairying Industry, Thompson 4.00 Dairying, Milk, Cheese and Butter, John Oliver 3.00 Dairymen's Manual, Henry Stewart 1.50 Farm and the Dairy, J. P. Sheldon, Special Commissioner, Canadian Govt 1.00 Farm Dairy, The, H. B. Gurler 1.00 Farm Dairying, Laura Rose 1.25 Net. i 1.00 .50 1.50 .75 .50 1.00 1.00 .50 .50 .50 2.00 .50 1.00 1.50 4.50 3.50 .50 1.50 1.00 Net. Farm Dairying, Michels $ 1.00 First Lessons in Dairying, H. E. VanNor- mau 50 Guenon's Treatise on Milch Cows, T. J. Hand 1.00 Handbook for Farmers and Dairymen, A, P. W. WoU 1.50 Jersey, Aldemey, Guernsey Cows, W. P. Hazard 1.00 Market Dairying, John Michels 1.50 Management and Feeding of Cattle, Thomas Shaw 2.00 Modern Dairy Farming, Puxley 1.50 Principles of Modem Dairy Practice, The, Gosta Grotenfelt, Pres. Mustiala Agr. Coll., Finland, Am. Edition, F. W. WoU. 2.00 Profitable Dairying, C. L. Peek 75 Standard Blacksmithing, Horseshoeing and Wagon Making, J. G. Holmstrom i Farm Blacksmithing, John Drew, School of Agr., Univ. of Minn Electricity in Agriculture and Horticulture, S. Lemstrom Electricity on the Farm, F. M. Conlee Electric Light for Country Houses, Knight Electricity for the Farm and Home, Frank Koester Electric Light for the Farm, Schneider Electric BeUs, How to Make and Fix Them, P. N. Hasluck Harness Making, P. N. Hasluck. Knotting and Splicing, P. N. Hasluck Farm Machinery and Farm Motors, David- son and Chase Wind Mills and Wind Motors, F. E. Powell Farm Mechanic, The, G. E. Emberley Power and the Plow, L. W. Ellis and E. A. Rumely Portland Cement, R. K. Meade, Gen. Mgr. Tidewater Portland Cement Co Reinforced Concrete in Europe, A. L. Colby Silos: Construction and Service, M. L. King, formerly of la. St. Coll Domestic Water Supplies for the Farm, M. L. Fuller Water Supply in Country Houses, 0. J. Lyude CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 177 DAIRY HUSBANDRY— Continued BACTERIOLOGY— CHEMISTRY. Net. Dairy Chemistry, H. D. Eiohmond $ 4.25 Dairy Chemistry, Harry Snyder, formerly of St. Paul, Minn 1.00 Experimental Dairy Bacteriology, H. L. Russell and E. G. Hastings, Coll. Agr., Wis 1.00 Practical Dairy Bacteriology, H. W. Conn. 1.25 MANUFACTURES— BUTTER— CHEESE. Butter and Butter Making, W. F. Hazard. .25 Cheese Making, Becker, Revised by F. W. Woll 1.75 Creamery Butter Making, Mieliels 1.00 Fancy Cheese in America, C. A. Pxiblow. . .75 Principles and Practice of Butter Making, G. L. McKay, formerly la. St. Coll., and C. Larsen, Prof. Dairy Husbandry, S. Dak 1.50 Science and Practice of Cheese Making, Van Slyke and Publow 1.75 MILK, PRODUCTS— TESTING. Analysis of Milk and Milk Products, Left- man 1.25 Clean Milk, S. D. Belcher 1.00 Condensed Milk and Milk Powder, O. F. Net. Hunziker, Dairy Husbandry, Purdue .... $ 5.00 Dairy Laboratory Guide, G. L. Martin 50 Dairy Laboratory Guide, A, H. E. Ross. . . .50 Dairy Cattle and Milk Production, C. H. Eekles, Prof. Dairy Husbandry, Univ. of Mo 1.60 Essentials in Milk Hygiene, C. O. Jensen and Leonard Pearson 2.00 Milk: Its Nature and Composition, C. M. Aikman 1.25 Milk: Its Production and Uses, E. F. Wil- loughby 2.00 Milk Question, The, Roseman 2.00 Milk and Its Products, H. H. Wing, Prof. An. Husbandry, Cornell 1.50 Milk and Dairy Products, Ghr. Barthel. . . 1.90 Modern Methods of Testing Milk, L. L. Van Slyke 1.00 Pasteurization and Milk Preservation, J. H. Monard 50 Production and Handling of Clean Milk, Winslow and Hill 3.25 Testing Milk and Its Products, Parrington and Woll 1.00 Testing Milk and Milk Products, L. L. Van Slyke 75 HORTICULTURE FRUITS. Net. American Horticultural Manual, J. L. Budd, formerly la. St. Coll., and N. E. Han- sen, S. Dak. Agr. Coll. 2 parts... Each $ 1.50 American Fruit Culturist, J. J. Thomas . . . 2.50 Apple Orchard, The American, F. A. Waugh 1.00 Apple Culture, Field Notes on, L. H. Bailey, Jr .75 Budding and Grafting, C. B. Battel 1.00 Bush Fruits, F. W. Card, formerly Rhode Island CoU. Agr. and Mechanic Arts 1.50 Citrus Fruits and Their Culture, H. H. Hume 2.50 Cider IMaker's Handbook, J. M. Trow- bridge 1-00 Cranberry Culture, J. J. White 1.00 Cape Cod Cranberries, James Webb 40 Foundations of American Grape Culture, T. V. Munson 2.00 Fruit Culturist, American, J. J. Thomas. . . 2.50 Fruit Culture, Successful, S. T. Maynard. 1.00 Fruit Culturist, Small, J. J. White 1.00 Fruit Culturist, SmaU, A. 8. Fuller 1.00 Fruit Garden, Barry's, P. Barry 1.50 Fruit Grower, Practical, S. T. Maynard ... .50 Fruit Growing in Arid Regions, Wendell Paddock, Prof. Horticulture, O. S. U., and O. B. Whipple, Colo. Agr. Coll 1.50 Fruit Trees, Dwarf, F. A. Waugh 50 Fruit Harvesting, Storing, Marketing, F. A. Waugh 1-00 Fruit Growing, Lessons in; Commercial, E. S. Goff l-OO Fruit Garden, How to Make a, S. W. Fletcher 2.00 Fruit Growing, Popular, S. B. Green, for- merly of Univ. of Minn., and LeRoy Cady, Univ. of Minn 100 Fruits and How to Raise Them, H. Har- Net. court $1.00 Fruits and How to Grow Them, E. J. Wiek- son 3.25 Fruits, How to Know Wild, M. G. Peter- son 1.50 Forcing-Book, The, L. H. Bailey, formerly of Cornell 1.25 Grape Culturist, A. S. Fuller 1.50 Grape Culture, Foundation of, American, T. V. Munson 8.00 Grape Grower's Guide, William Chorlton. . .75 Grape Growing and Wine Making, G. Hus- mann 1.50 Handbook of Plants and General Horticul- ture, Peter Henderson 3.00 Hardy Garden, A Woman's, Helena R. Ely 1.75 Hardy Garden Book, Another, Helena R. Ely 1.75 Nut Culturist, The, A. S. Fuller 1.50 Nursery Book, The, L. H. Bailey 1.50 Orchard and Fruit Garden, E. P. Powell. . . 1.27 Peach Culture, J. A. Fulton l.OC Peach Orchard, The American, F. A. Waugh l.OC Pear Culture for Profit, P. T. Quinn l.OC Pecan and Its Culture, The, H. H. Hume. . l.OC Peanut Plant, The: Its Cultivation and Uses, B. W. Jones 5( Plums and Plum Culture, F. A. Waugh. . . 1.5( Pomology, Systematic, F. A. Waugh l.OC Pruning Book, The, L. H. Bailey 1.5( Productive Orcharding, F. C. Sears 1.5( Propagation of Plants, The, A. S. Fuller. . 1.5( Quince Culture, W. W. Meeeh 1.0( Strawberry Growing, Modern, A. E. Wil- kinson 1.11 Strawberry Culturist, A. S. Fuller 71 178 CENTRAL SCIRNTIFIC CO., CHICAGO, V. S. HORTICULTURE— Continued GREENHOUSES. Net. Greenhouse Construction, L. R. Taft $ 1.50 Greeohouse Construction and Heating, B. C. Ravenscroff 1.50 Greenhouse Management, L. R. Taft 1.50 VEGETABLES. Asparagus Culture, James Barnes and William Robinson 50 Asparagus, Book on, Charles Ilott 1.00 Bean Culture, G. C. Sevey. 50 Celery Culture, W. R. Beattie 50 Celery, Kalamazoo Culture of, G. Von Bochone 50 Commercial Gardening, By many practical specialists under editorship of John Weathers. 4 quarto volumes 15.00 Dictionary of Gardening, Nicholson. 5 vols. 29.00 Farm and Garden Rule Book, L. H. Bailey 2.00 Farm Gardening and Seed Growing, Fran- cis Brill 1.00 Garden Farming, Lee, Cleavel and Cor- bett, U. S. Dept. Agr 2.00 Garden Week by Week, The, W. P. Wright 2.00 Gardening in California, John McLaren.. 1.75 Gardening for Profit, Peter Henderson. . . . 1.50 Gardening for the South, P. H. Mill 2.50 Ginseng, M. G. Kains 50 Ginseng and Other Medicinal Plants, A. R. Harding 1.00 How to Make a Vegetable Garden, Edith Fullerton 2.00 How to Grow Vegetables, Allen French. . . 1.75 How to Grow Vegetables and' Garden Herbs, Allen French . .- 1.75 Manual of Gardening, L. H. Bailey 2.00 Market Gardening and Farm Notes, Bur- nett Landreth 1.00 Melon Culture, J. Troop i Mushrooms: How to Grow Them, William Falconer Mushroom Book, The, Nina L. Marshall.. Mushroom Culture, W. Robinson Mushrooms, G. E. Atkinson Mushroom Handbook, E. L. Lathrop Mushrooms in America, Taylor New Standard Cyclopedia of Horticulture, The, L. H. Bailey. 6 vols Each Onion Culture, The New, T. Greiver Potato, Eraser Practical Garden Book, The, L. H. Bailey and C. E. Hunn Principles of Vegetable Gardening, The, L. H. Bailey Productive Vegetable Growing, J. W. Lloyd, Univ. of 111 , Propagation of Plants, The, A. S. Fuller. . Rhubarb Culture, The New, J. E. Morse Seed Grower, The, Charles Johnson Southern Gardener's Practical Manual, J. S. Newman Spraying of Plants, The, E. G. Lodeman, formerly of Cornell Success in Market Gardening, H. W. Ean- son Sweet Potato Culture, James Fitz Tomato Culture, W. W. Tracy Tomato Culture, Pay, Cummins and Root. . Truck Farming in the South, A. Oemler. . Vegetable Gardening, S. B. Green, formerly of Univ. of Minn Vegetable Garden, The, Ida D. Bennett. . Vegetable Gardening, Watts FORESTRY Net. Among Green Trees, J. E. Rogers $ 3.25 Economics of Forestry, B. E. Fernow 1.50 Evergreens, and How to Grow Them, C. S. Harrison 50 Farm Forestry, Alfred Akerman 50 Farm Forestry, Cheyney 1.50 First Book of Forestry, Filibert Roth 75 Forest Mensuration, H. S. Graves, Chief Forester, U. S. Dept. Agr 4.00 Forest Physiography, Isaiah Bowman, Asst. Prof. Geology, Yale 5.00 Forest Planting, H. Nicholas Jarchow. . . . 1.50 Forestry in New England, R. C. Hawley, Asst. Prof. Forestry, Yale, and A. F. Hawes, State Forester, Vermont 3.50 Getting Acquainted With the Trees, J. H. McFarland, Pres. Am. Civic. Service Asso 1.50 Handbook of Trees in the Northern States and Canada, R. B. Hough 10.00 Identification of the Economic Woods of the U. S., S. J. Record 1.25 Important Timber Trees of the U. S., Elli- ott 2.50 In American Fields and Forests 1.50 Logging, E. C. Bryant 3.50 Long-Leaf Pine in Virgin Forest, The. 6. F. Schwarz 1.25 Manual of Forestry, A. William Schlick, 5 vols 19.00 Net. 0.50 1.00 3.25 .50 3.25 1.00 3.00 6.00 .50 .75 1.00 1.50 1.50 1.50 .50 1.25 1.00 1.25 1.10 .50 .50 .40 1.00 1.00 1.50 1.75 Net. ! 6.25 .35 2.00 2.00 1.50 1.25 1.50 1.50 Manual of Trees, A, C. S. Sargent i Maple Sugar and Sugar Bush, C. Cook. . . . North American Forests and Forestry, Er- nest Brunken Our Native Trees and How to Identify Them, Harriet L. Keeler Practical Forestry, A. S. Fuller Practical Forestry, John Gifford Principles of American Forestry, S. B. Green The Farm Woodlot, E. G. Cheyney, Dept. Forestry, Univ. of Minn The Principles of Handling Woodlands, H. S. Graves, Chief Forester, U. S. Dept. Agr 1.50 Theory and Practice of Working Plans of Forest Organization, A. B. Reoknagel. . 2.00 Timber and Some of Its Diseases, H. M. Ward 1.75 Tree Book, The, Julia E. Rogers 4.25 Tree Doctor, The, John Daney 2.00 Trees and Shrubs, C. S. Sargent. In 4 parts, 4 in 1 Vol 21.00 Trees and Shrubs of Northeastern North America, C. S. Newhall 2.00 Trees and Tree Planting, J. S. Brisbin 1.50 Trees in Winter, A. F. Blakeslee and C. D. Jarvis 2.00 Trees of the Northern V. K., A. C. Apgar. liOD White Pine, The, A Study, Pinchot and Graves LOO CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 170 LANDSCAPE GARDENING AND FLORICULTURE FLORICULTURE. Net. American Flower Garden, The, Neltje Blan- ehau i ]^_gO Flower Decoration in tlie Housed Geitriide JekyU 2.00 Home Decoration, E. E. Eexford 1.00 Home Floriculture, E. E. Rexford 1.00 Home Floriculture, C. N. Page 75 Parsons on the Rose, S. B. Parsons 1.00 Popular Garden Flowers, W. P. Wright 2.50 Practical Floriculture, Peter Henderson.. 1.50 Practical Flower Garden, The, Helena E. Ely 2.00 Roses in Pots, The Cultivation of, William Paul 1.00 Roses, A Book About, Dean S. E. Hole.. 1.25 Rose Book, The Amateur Gardener's, Ju- lius Hoffman 2.75 Rose, The, H. B. EUwanger 1.25 Sweet Peas, N. H. Pearson 30 Window Gardening, H. B. Dorner, Prof. Floriculture, IT. of HI 1.00 LANDSCAPE GARDENING. Art of Landscape Gardening, The, H. B. Price 3.00 Beautifying Country Homes, J. Weidemann 10.00 Country Residences in Europe and Amer- ica, L. V. LeMoyne 8.00 Farm Windbreaks and Shelter Belts, 8. B. Green, late Prof, of Hort., Univ. of Minn •. ."25 Formal Garden in England, The, E. Blom- field 3.15 Garden Making: Suggestions for the Util- izing of Home Grounds, L. H. Bailey and others ^ 1.50 Gardens of England, The, Beatrice Parsons.i Hardy Plants for Cottage Gardens, Helen R. Albee How to Lay Out Suburban Home Grounds, H. T. Kellaway How to Plan the Home Gardens, Samuel Parsons, Jr Landscape Gardening, Edward Kemp .... Landscape Gardening as Applied to Home Decoration, S. T. Maynard, formerly of Mass. Agr. Coll Landscape Beautiful, The, F. A. Waugh.. Landscape Gardening Book, The, Grace Tabor Landscape Gardening, F. A. Waugh Lawns and How to Make Them, ijeonard Barron New Gardening, W. P. Wright Ornamental Shrubs of the U. S., A. C. Ap- gar Ornamental Gardening for Americans, E. A. Long Our Native Shrubs and How to Identify Them, Harriet L. Keeler Plea for Hardy Plants, J. W. Elliott Residential Sites and Environments, J. F. Johnson School and Home Gardens, W. H. D. Meier, St. Normal School, Pramingham, Mass. Shade-Trees in Towns and Cities, William Solotaroff, See. and Supt. Shade-Tree Commission, East Orange, N. J Trees in Lawn, Street and Park, The Care of, B. D. Pernow What England Can Teach Us About Gar- dening, Dr. Wilhelra Miller Yard and Garden, Tarkington Baker' ENTOMOLOGY A Manual for the Study of Insects, J. H. Net. Comstock $ 3.60 American Insects, V. L. Kellogg 5.00 Economic Entomology, Smith 2.50 Elementary Entomology, E. D. Sanderson, Dean Coll. Agr. W. Va. Univ., and C. F. Jackson, Prof. Zoology, New Hamp- shire Coll 2.00 Fumigation Methods, W. "G. Johnson 1.00 Fruit Insects, M. V. Slingerland and C. R. Crosby 2.00 Guide to the Study of Insects, A. 8. Pack- ard 5.00 Injurious Insects and the Use of Insecti- cides, F. W. Sempers 40 Injurious Insects: How to Recognize and Control Them, W. C. O'Kane $ Injurious Insects of the Farm and Garden, Mrs. Mary Treat Insects and Insecticides, C. M. Wood, Prof. Ent. and Zoology, N. H. Coll. Agr.... Insect Book, The, L. O. Howard Insects Injurious to Staple Crops, E. J). Sanderson Insects Injurious to Vegetables, F. H. Chittenden Insect Life, J. H. Comstock Insect Pests of Farm, Garden, and Or- chard, E. D. Sanderson BACTERIOLOGY AND PLANT DISEASES Net. Agricultural Bacteriology, H. W. Conn...$ 2.00 Agricultural Bacteriology, Eussell and Has- tings 1.25 Bacteria in Relation to Plant Diseases, Ed- win 8. Smith 4.00 Bacteria in Relation to Country Life, Ja- cob G. Lipman, N. J. Exp. Sta 1.50 Diseases of Cultivated Plants and Trees, George Massee, Asst. Keeper, Herbarium Royal Botanic Gardens, Kensington, Eng 2.25 Diseases of Economic Plants, F. L. Ste- vens and J. G. Hill 2.00 Diseases of Plants, K. F. Von Tubeuf f Diseases in Plants, H. M. Ward Fungi Which Cause Plant Disease, The, F. L. Stevens, Prof. Vegetable Pathol- ogy, Univ. of 111 Fungous Diseases of Plants, B. M. Duggar, Prof. Plant Phys., Cornell . . . •. Insects Injurious to Fruits, William Saun- ders Life Histories of American Insects, Weed Manual of Bacteriology, Muir and Ritchie Plant Physiology With Special Reference to Plant Production, B. M. Duggar Net. 2.50 l.GO 2.00 1.00 1.50 1.50 2.00 2.00 .75 1.00 2.00 1.50 1.50 2.00 1.75 2.50 .80 3.00 2.00 4.00 2.00 Net. 2.00 1.50 1.50 3.25 1.50 1.50 1.75 3.00 Net. ; -5.50 1.75 4.00 2.00 2.00 1.50 4.00 1.60 180 CKNTEAL SCIENTIFIC (^O., CHICAGO, V. S. A. HOUSEHOLD SCIENCE AND ARTS GENERAL. Net. Bacteria, Yeasts, and Molds in the Home, H. W. Conn, Prof. Bacteriology, Wes- leyan Univ $ 1.00 Basic Principles of Domestic Science, Lilla Prioh, Domestic. Science Dept., Minn. Public Schools 1.50 Common Sense in the Household, Marion Harland 1.50 Domestic Science, Ida Hood Clark 1.00 Household Bacteriology, B. E. Buchanan and Estelle D. Buchanan 2.25 Household Chemistry, H. T. Vulte, Colum- bia Univ., and G. A. Goodell, Wellesiey College 1.25 Household Science, Juniata L. Shepperd, Univ. of Minn 1.75 Manual of Bacteriology, A, for Agr. and Dom. Sci. Students, H. S. Eeed, Va. Polytechnic Inst 1.25 Principles of Human Nutrition, W. H. Jor- dan. N. Y. Agr. Exp. Sta 1.75 FOODS AND THEIR PEEPARATION. Breadmaking Chemistry, J. Grant 1.40 Canning and Preserving, Mrs. Eorer 50 Cook Book, Century, Mary Ronald 2.00 Cook Book, Boston Cooking School, Fan- nie Farmer 2.00 Cook Book, Fireless, Margaret J. Mitchell 1.25 Cook Book, Vegetarian, Fulton 1.00 Cook Book, Home Science, Lincoln and Barrows 1.00 Cook Book, Complete, Marion Harland . . . 2.00 Cook Book, The Winston, Helen Cramp, Univ. of Chicago 1.35 Cook Book, The Country Kitchen, many contributors 50 Cooking for Two, Janet Hill 1.50 Detection of Common Food Adulterants, E. M. Bruee 1.25 Foods and Their Adulteration, H. W. Wiley 4.00 Food and Nutrition, The Chemistry of, H. C. Sherman 1.50 Foods: Their Composition and Analysis, A. and M. Blyth 7.50 Foods, Pure. Adulteration, Nutritive Value and Cost, J. C. Olsen, Polytechnic Inst., Brooklyn, N. T 80 Foods and Feeding, Henry Thompson 1.35 Fruit Becipes, Ida M. F. Berry 1.50 Left-Overs Made Palatable, Isabel G. Cur- tis 1.00 Net. Manufacture of Preserved Food and Sweetmeats, A. Hausner $ 3.00 Eecipes for the Preserving of Fruit, Vege- tables and Meat, Wagner 2.50 Theory and Practice of Cookery, Williams and Fisher 1.00 Things Mother Used to Make, Lydia Ma- ria Gurney 50 What to Have for Luncheon, Mary J. Lin- coln 1.25 AETS. From Kitchen to .Garret, Virginia T. Van- deWater 1.00 Home Nursing, Eveleen Harrison 1.00 Home Lace-Making, Milroy 1.00 Household Textiles, Charlotte M. Gibbs (Baker), formerly Univ. of 111 1.25 Laundry Work, Juniata L. Shepperd. ..... .60 Textiles and Clothing, Watson 1.50 HOMES. Complete Etiptuette, Marion Harland 1.00 Cottage Houses, With Complete Plans and Specifications, S. B. Eeed 1.00 Distinctive Homes of Moderate Cost, H. H. Saylor 2.00 Farm Sewage, Dr. Santee 50 Handbook of Home Economics, Flagg 75 Home Economics, Maria Parloa. 1.50 Housekeepers' Week, The, Marion Harland 1.50 Homes for Home Builders, W. D. King 1.00 Houses for Town or Country, William Her- bert 2.00 How to Build a Home, F. C. Moore 1.00 Guide to the Country Home, B. K. Par- kinson 1.00 Modern Household, Talbot and Breeken- bridge : 1.00 Modern House Plans for Everybody, S. B. Eeed 1.00 Neighborhood Entertainments, Eenee B. Stern 1.00 Principles of Home Decoration, Candace Wheeler 2.00 Progress in the Household, Lucy M. Sal- mon, Vassar College 1.10 Sanitation of a Country House, Bashore. 1.00 Self-supporting Home, A, Kate V. St. Maur 1.75 Ventilation for Dwellings, Eural Schools and Stables, F. H. King 75 RURAL SOCIOLOGY Net. Chapters in Eural Progress, Butterfleld . . . $ 1.10 Constructive Eural Sociology, J. M. Gil- lette, Prof. Sociology, Univ. of N. Dak. 1.60 Country Church and the Eural Problem, Butterfield 1.00 Net. How to Live in the Country, E. P. Powell . $ 1.75 Report of the Country Life Commission 1.00 The Country-Life Movement, L. H. Bailey 1.25 The Rural Life Problem of the TJ. S., Sir Horace Plunkett 1.25 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 181 SECONDARY AGRICULTURE GEKEBAL. Net. Agricultural Engineering, J. B. Davidson, Prof. Agr. Engineering, Iowa St. Coll...$ 1.50 Agriculture, Soule and Turpin 75 Agriculture for Beginners, Burkett, Stevens and Hill • .75 Agriculture for Common Scbools, M. L. .Fisher, Purdue, and F. A. Cotton 1.00 Agriculture for Schools on the Pacific Slope, E. W. Hilgard, Emeritus Prof. Agr., Univ. of Cal., and W. J. V. Oster- hout, Asst. Prof, of Botany, Harvard. . 1.00 Agriculture for Southern Schools, J. F. Duggar, Director Alabama Agr. Exp. Sta 75 Agriculture Through the Lahoratory and School Garden, Jackson and Daugherty 1.50 Agriculture for Young Folks, A. P. Wil- son, Supt. Farmers' Inst, and Agr. Ext., Univ. of Minn., and E. W. Wilson 1.00 Beginnings in Agriculture, A. E. Mann. . .75 Catechism of Agriculture, T. C. Atkeson . . .50 Elementary Principles of Scientific Agri- culture, N. T. Lupton, formerly of Van- derbUt Univ., Nashville, Tenn 35 Elements of Agriculture, G. F. Warren, Prof. Farm Management, Cornell 1.10 Elements of Agriculture, Southern and Western, W. C. Welborn, Viee-Direetor, Texas Exp. Sta 75 Elements of Agriculture, J. H. Shepperd, Dean Agr. Dept. N. Dak. Agr. Coll., and J. C. McDonnell, U. S. Dept. Agr 1.00 Farm Arithmetic, Shutts and Weir, in prepr. Farm • Arithmetic, C. W. Burkett and K. D. Swartzel 1-00 Farm Friends and Farm Foes, C. M. Weed, St. Normal School, Lowell, Mass 90 First Principles of Agriculture, E. S. GofE, late Prof, of Horticulture, Univ. of Wis., and D. D. Mayne, Sch. of Agr., Univ. of Minn • • -80 First Book of Farming, 0. L. Goodrich.. 1.00 Fundamentals of Agriculture, J. B. Halli- gan, La. State Univ. Exp. Sta 1.25 Fundamentals of Farming and Farm Life, Kyle and Ellis, Texas Agr. Coll 1.25 General Agriculture, A. D. and E. W. Wil- son 1-00 High School Agriculture, D. D. Mayne, Univ. of Minn., and K. L. Hatch, Univ. of Wis 1-00 High School Agriculture, several authors. In prepr. Introduction to Agriculture, A. A. Upham .75 Manual of Agriculture, D. O. Barto, Univ. of 111 SO Manual of Agr. for Secondary Schools, Call and Shafer 9° Net. Our Farming, Terrey $ 1.00 Practical Lessons In Agr., L. S. Ivins, State Supervisor Agr. Ed., O., and F. A. Merrill, State Normal School, Athens, Ga. In prepr. Practical Agriculture, J. W. Wilkinson, Supervisor of Agr., San Diego, Cal. . . . 1.00 Principles of Agr., The, L. H. Bailey 1.25 Principles of Agr., I. O. Winslow 60 Principles of Agriculture Through the School and the Home Garden, The, C. A. Stebbins 1.00 Productive Farming, K. C. Davis, N. J. Coll. Agr 1.00 Rural School Agriculture, C. M. Davis. . . 1.00 School Agriculture, M. N. Wood .90 Text Book of Southern Agriculture, F. S. Earle 1.25 Text Book of Tropical America, A, H. A. A. Nichols, Senior Medical Officer,' Do- minica, West Indies 1.3C Teaching of Agriculture in the High Schools, G. A. Brieker l.OC KURAL EDUCATION. Farm Boys and Girls, W. A. MeKeener, Prof, of Child Welfare, Univ. of Kans. 1.5C Improvement of Rural Schools, E. P. Cub- berley, Leland Stanford Univ 3£ New Ideas in Rural Schools, G. H. Betts, Prof. Psy., Cornell Coll 6( New Methods in Education, J. L. Todd 2.0( Rural Life and Education, E. P. Cubberley 1.5( DOMESTIC SCIENCE. Elementary Domestic Science, Sarah Lan- des 8i A New and Practical Sewing Course, Mar- garet J. Blair 51 Domestic Science — ^Principles and Applica- tion, Pearl L. Bailey, Sup. of Dom. Sei., St. Paul 1.0 HEALTH. Health on the Farm, H. F. Harris 1.0 Malaria: Cause and Control, W. B. Herms 1.5 Rural Hygiene, Poore 2.0 Rural Hygiene, H. N. Ogden, Prof. Sani- tary Engineering, Cornell 1.5 ANIMALS. Animals, N. L. Kellogg 1.8 Animal Studies, D. S. Jordan 1.2 Beginnings in Animal Husbandry, C. S. Plumb, Prof. An. Husby., O. St. Univ. . 1.2 Birds That Every Child Should Know, Neltje Blanehan 1.2 182 CENTRAL SCIENTIFIC CO., CHICAGO, V. S. A. SECONDARY AGRICULTURE— Continued SOILS AND CROPS. Net. Agronomy, Practical Gardening for High Schools, W. N. Clute $ 1.00 The Corn Crops, E. G. Montgomery, Prof. Farm Crops, Cornell 1.60 Crop Production, C. M. Weed and W. E. Ri!ey, St. Normal School, Lowell, Mass.. .80 Soils and Soil Fertility, A. E. Whitson and W. L. Walster, XJniv. of Wis 1.25 rield Crop Production, George Livingston, Ohio St. TJniv 1.20 Soils and Crops — A Manual of Agriculture, D. O. Barto, Univ. of 111 50 PLANTS AND GARDENS. Agricultural Botany, Percival 2.50 Amateur Fruit Growing, S. B. Green, late Prof. Hort., XJniv. of Minn 50 Beginner's Guide to Fruit Growing, F. A. Waugh 75 Net, Beginner's Garden Book, The, Allen French. In prepr. Fruit Culture for Amateurs, S. T. Wright. $ 1.50 Gardens and Their Meaning, Dora Wil- liams, Teacher Boston Normal School.. 1.00 Gardening for Beginners, E. T. Cook 4.00 Guide to the Trees, Alice Lounsberry. . . . 1.90 Guide to the Wild Flowers, Alice Louns- berry 1.90 How to Know the Wild Flowers, Mrs. W. S. Dana 2.00 How to Make School Gardens, H. D. Hem- ' enway 1.00 Laboratory and Field Manual of Botany, A, Bergen and Davis 90 Nature Study: A Manual for Teachers and Students, F. L. Holtz 1.50 Nature Study Idea, The, L. H. Bailey 1.25 Plant Life and Plant Uses, J. G. Coulter. . 1.20 Studies of Trees in Winter, Annie O. Hunt- ington 2.50 BIRDS Net. Color Key to North American Birds, F. M. Chapman $ 2.50 Field Book of American Wild Birds and Their Music, F. S. Mathews 2.00 Handbook of Birds of Eastern North America, P. M. Chapman 3.00 Handbook of the Birds of the Western United States, Florence Bailey 3.50 Net. Michigan Bird Life (Bulletin), W. B. Bar- rows $ 0.60 Our Common Birds and How to Know Them, J. B. Grant 1.50 Our Domestic Birds, J. H. Robinson, Editor Farm Poultry 1.35 MISCELLANEOUS Net. Agriculture, W. P. Brooks. 3 vols. .Each $ 2.00 A Manual of Practical Farming, John Mc- Lennan, Supt. of Farms, N. Y. School of Agr 1.50 A Treatise on Roads and Pavements, I. O. Baker, XJniv. of 111 •. . . 5.00 Commercial Raw Materials, C. R. Tooth- aker. Curator Phila. Museums 1.25 Cyclopedia of American Agriculture, L. H. Bailey. 4 vols 32.00 Elementary Meteorology, W. M. Davis, Prof. Geology, Harvard 2.50 Farmer's Cyclopedia 20.00 Vol. I. Farm Animals, Etc. Diseases of Horses, Swine, Poultry. Diseases of Cattle, Sheep, Goats, Etc. Grass, Hay, Grains, Vegeta- bles. Fruits, Forests, Flowers, Cot- ton; Tobacco, Sugar Beets, Sugar Cane. Plant Diseases, Etc. Farming Methods, Soil Fer- tilizers, Irrigation, Rotation. Farmer's Cyclopedia of Agriculture, E. V. Wilcox and C. B. Smith 3.50 Vol. II. Vol. III. Vol. IV. Vol. V. Vol. VL Vol. VII. How to Choose a Farm, T. F. Hunt f Poems of Country Life: A Modern An- thology, G. S. Bryan Practical Exercises in Elementary Meteor- ology, R. D. Ward Roads, Paths and Bridges, L. W. Page Rural Wealth and Welfare, G. T. Fairchild, late Pres. Agr. Coll., Kansas Small Country Place, The, S. T. Maynard. . The Call of the Land, E. B. Andrews The Conservation of Natural Resources in U. S., C. R. Van Hise, Pres. XJniv. of Wis The Farmer of To-morrow, F. T. Anderson The Farmstead, I. P. Roberts, Emeritus Prof. Agr. Cornell The Fat of the Land, J. W. Streeter The Outlook to Nature, L. H. Bailey The Satisfaction of Country Life, J. W. Robertson The State and the Farmer, L. H. Bailey. . The World's Commercial Products, W. G. Freeman and S. E. Chandler Tropical Agriculture, H. A. Nichols Young Farmer, The: Some Things He Should Know, T. F. Hunt Net. ; 1.75 1.00 1.12 1.00 1.25 1.50 1.50 2.00 1.50 1.50 1.50 1.25 1.00 1.25 3.00 1.30 1.50 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 183 No. 9152. 9152. SOIL AUGER, Neliraska Design, designed for general work in soil investigation; espe- cially adapted to work where samples at exact depths are desired, since with this instru- ment it is possible to secure samples of soil one inch in thickness to a total depth of two feet. This type of auger has .been used with satisfactory results by the Nebraska Agricultural Experiment Station in securing samples of soil for chemical analysis and soil moisture studies. The auger is also well adapted for use in making determinations of the apparent specific gravity of soils under field conditions, since a definite volume of soil may be removed without the necessity of digging around a tube and cutting the soil oS even with the lower edge. In use the auxiliary tube is driven into the soil to such a depth that when the auger blade is just resting on the surface of the soil, the adjustable gauge may be set in the first notch on the auger stem, and at the same time rest On the top of the tube. The gauge is then raised to the next notch and the auger turned until the gauge again comes in contact with the top of the tube^ or, in other words, has removed one inch of soil, since the notches are one inch apart. In this manner, a sample of soil from each inch may be obtained from a depth of 2 feet. Complete with auxiliary tube $ 7.50 9173. SOUi SAMPI^R, Bacteriologist's, after specifications by H. A. Noyes of the Purdue University Agricultural Experi- ment Station. This sampler is a brass cylinder 11 inches long by 2 inches in diameter, with an especially constructed cutting edge. The end having the cutting edge is furnished with a tight fitting brass cap 2 inches in height. When the upper end is plugged with absorbent cotton, the sampler is ready for sterilization. The sampler is easy to sterilize, • easily kept clean, easy to use, and durable, and hence will be found valuable in bacteriological work. This apparatus will (1) sample accurately soil subjected to any system of man- agement; (2) not interfere with the field conditions exist- ing where the sample is taken, thus making future samples comparable; (3) give a representative sample of soil; and (4) keep the sample practically under field conditions until analyzed, since the tube itself acts as container for the sample. Graduated as shown in the illustration, and with directions for use. . No. 9173. 9173 A. DRIVING HEAD, of cast iron, for use with No. 9173 Soil Sampler. 9198. SHRINKAGE APPARATUS, for determining the shrinkage of soils, as described in Hosier and Gustaf son's "Soil Physics Laboratory Manual," and used at the Univer- sity of Illinois. This is a tray of brass, 3 inches square at the top, with beveled sides to facilitate removal of the soil sample. In use, a piece of cheese cloth is placed on the bottom of the tray, which is then filled with moist soil. The soil block is then removed from the tray and allowed to dry. The shrinkage in area may readily be de- termined by measurement. 1.65 .30 .50 184 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. * urn No. 9274A. No. 9273A. 9237. THERMOMETER, Soil, Recording. Consists of a recorder case containing clock movement for re- volving the ch'art, and a steel coil spring for actuating the recording pen arm; a flexible con- necting tube through -whieh. the action of the mercury in expanding or contracting ' is trans- mitted from the sensitive element (the bulb) to the coil spring; and a bulb or sensitive element which is inserted at the point whose temperature No. 9237. is to be determined. The spring, the steel con- necting tube, and the bulb are welded together, forming a hermetically sealed mercury filled system. When the mercury in the system expands or contracts because of temperature changes at the bulb, the action is in- stantly transmitted through the connecting tubing to the spring and an accurate record made on the chart by the recording pen arm. This instrument may be used to great advantage in determining the relative tempera- tures "of drained and undrained soils; of cultivated and uncultivated fields; of fallowed and cropped fields; and the effect of different methods of cultivation upon soil tem- perature. It may also be used to determine the effect of the temperature of the soil and sub-soil on the growth of plants, and the effect of soil temperature on the bacterial activities of the soil and therefore on the formation of nitrates in the soil. The recorder ease is of black enameled iron with nickel-plated ring, and the equipment furnished includes 100 charts, divided for making one revolution in seven days and graduated from — 40° to -|-120°P. in 2° divisions, extremely sensitive bulb 18 inches long, and 15 feet of flexible protected capillary tubing. (In case a greater length of tubing is desired, state exact length in order and add 40 c^ per foot for each foot over 15.) Complete with supply of ink and pens Net $ 48.00 9237A. THERMOMETER, Soil, Recording. Same as No. 9237, but with 100 charts graduated from — 20° to +60°C. in 1° divisions Net 9237C. CHARTS for No. 9237, 8-inch, 7-day. Per hundred Net 9237D. CHARTS for No. 9237A, 8-ineh, 7-day. Per hundred Net 9254A. CEIiULOID STRIP, 36 x 3 in., for either No. 9253 Capillarity Tube or No. 9254 Exten; sion Tube. (See page 36.) 48.00 .75 .75 .30 9257. CAPILLARITY TUBES, of celluloid, protected by wire gauze. (See page 36 for full description. The 12 in. length is new.) Length, inches 12 Each $ 0.55 9257 A. CELLULOID STRIPS, for No. 9257 Tubes. Length, inches 12 Each .20 9273A. SPECIFIC GRAVITY TUBE, for determining the apparent specific gravity of surface soi^s under field conditions. Of steel, 12 inches long by 4 inches inside diameter, with cutting edge 9274A. DRIVING HEAD of cast iron. For use with No. 9273A Specific Gravity Tube to pre- vent battering the upper edge when the tube is driven into the ground 24 36 48 75 1.10 1.65 24 36 48 .45 .60 .85 4.0( 1.1( CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 185 MOISTURE TESTER ACCESSORIES— Continued, from page 47. 9332. CONDENSER TXJBE, for moisture testers Net i 9333. GRADUATED CYLINDER, for moisture testers, 25 e. c, graduated in one-fifth c. c. .Net 9334. GRADUATED CYLINDER, for moisture testers, new design; for use when 50 gram samples are being tested. With this graduate the percentage of water is given by direct reading without the necessity of multiplying by two, as with the original grad- uate Net 9335. OIL, for moisture testers, according to the specifications of the Bureau of Plant Indus- . try. Per gallon can, Net, .60; per 5-gallon can Net 9336. RUBBER STOPPERS NO. 5. Especially designed to stand the high temperature exist- ing in moisture test flasks; are absolutely necessary when copper flasks are used. Per dozen, Net, 1.60; per pound Net 9337. THERMOMETERS. to 200 degrees centigrade. Special design for moisture testers. Each Net G361. ELECTRIC SIGNALLING DEVICE, for use with any Moisture T|feter. Bell sounds when thermometer registers 185°C. Prevents breakage of thermometers due to high tempera- tures. »-^*" For Tester No G350-2 G353-5 '"0356-8 When ordered with Tester Net $6.00 11.00 16 00 When ordered separately Net 8.50 15.50 22.50 G363. AUTOMATIC OIL MEASURING AND GRAIN SEPARATING DEVICE. Consists of a galvanized iron tank, reinforced strongly with brass, and so mounted on brackets that it can readily be attached to any of the moisture testers listed on page forty-seven; fitted with a measuring device which automatically measures out 150 c. c. of oil into test flask by merely pushing the neck of the flask upward against an automatic catch. The cover of the tank is fitted with a funnel shaped sieve, which catches the m'xture of grain and oil as it is poured from the flask after the test, and strains the oil into the container below. In this way the oil is kept free from dust and dirt, and the same oil may be used repeatedly Net 0.25 .60 .75 2.25 2.25 1.50 5.00 No. 9308. No. 9339A. 9308. SULPHUR DETERMINATION APPARATUS, for determining whether grain has been bleached, as recommended in Circular No. Ill of the United States Bureau of Plant In- dustry. Consists of an Erlenmeyer flask with ground-in stopper, and connecting tube. Capacity, 500 e. e 9339A. SIEVES, Com Test. Similar to No. 9339 (page 49), but of aluminum, 10 inches in diam- eter : • ■ Net 9339B. SIEVES, Oblong Telescoping, of non-rusting metal, for quick .dockag^determinations and tests on samples of wheat. Set consists ;of one sieve with W^^^ round .holes, one with %4 in. triangular holes, one with %4 "in. round holes, and or^p|ttom pan. .Net 9339C. SIEVES, Oblong Telescoping, similar to No. 'QSSgB, but for bsirley aiS^oats. Set con- sists of one sieve with holes %4 x % in., one with 19^4 in. round holes, one with %j, in. round holes, and , one bottom pan, •, . .. ; Net 9339D. SIEVES, Oblong Telescoping, similar to No. 9339B, but for corn. Set consists of one sieve with ^, in. round holes, one with %4 in. round holes, and one bottom pan Net 9339E. SIEVES, Oblong Telescoping. Set consists of one sieve each'^of the six styles mentioned under Nos. 9339B, 9339C, and 9339D, and one bottom pan, thus making a complete set for use with wheat, barley, oats and corn Net 9347. FLOWER POT SAUCERS, first quality, to match No. 9345 Flower Pots, page 51. Diameter, inches 3 4 6 8 Per dozen 12 .17 .33 .60 2.00 3.50 4.00 4.00 3.00 r.oo 186 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. r-| •^:| ™ ' 1 1 ' 1 ' '"1 ■■ 1- 1 ^^HHB^^^^^ ; ^*m!Wu«s^^^ iSP, 1 Ig^ L Jk^^J lI It^i^^^HH^H] No. 938gA. No. 9389F. The collections listed on this page are prepared by the Department of Botany of the North Dakota Agricultural College. 9389A. PLANT DISEASE COLLECTION, showing twenty typical plant diseases. Each speci- men is enclosed in a box with celluloid topped sliding cover, and the entire set is con- tained in a substantial ease about 17%xll%xl in. Descriptions are included. Net 9389F. WEED SEED COLLECTION, No. 1. Seeds of twenty-six weeds in labeled vials as fol- lows: Canada Thistle, Chess, Cockle (2 var.). False Flax, Frenchweed, Marsh Elder, Mustard (4 var.), Peppergrass, Pigeon Grass, Pigweed (3 var.), Prickly Lettuce, Quaek Grass, Eagweed, Eussian Thistle, Shepherd's Purse, Sunflower, Water Hemlock, Wild Barley, Wild Buckwheat, Wild Oats. In heavy compartment pasteboard box about 9% x5% X % inches Net 9389G. WEED SEED COLLECTION, No. 2. Same as No. 9389F, but with the following twenty- six specimens: Beggar Tick, Bindweed, Bur Clover, Catchfly, Chicory, Cinquefoil, Coeklebur, Crab Grass, Dock, Dodder (3 var.), Ergot, Evening Primrose, Holy Grass, Milkweed, Persioaria, Plantain (2 var.), Kagweed, Sandbur, Sorrel, Sow Thistle, Sweet Clover, Vetch, Witch Grass Net CENTHAl SQIIUTIF/C CO, No. 938gB. 9389E. WEED COLLECTION, No. 1. A portfolio showing specimens of mature and immature plants corresponding to No. 9389F Weed Seed Collection, mounted on heavy cards about 16% X lli/i inches, with full descriptions ., Net $ 3.50 2.50 2.50 3.50 CENTEAL SCIENTIFIC CO., CHICAGO, U. S. A. 187 MATERIALS FOR MOUNTING SEED SPECIMENS CRimOHClCVER SWEET CIJOVER No. 9390A. On account of the demand for materials with which to mount small seed specimens similar to those described under Nos. 9390A-F on page 61, we are listing the parts be- low. 9390B. PEEFORATED CAP.DS, 3% x 4 in., with six holes 1 inch in diameter, without printing. Per dozen, Net $0.25; per hundred Net 3784. SUDE COVER GLASSES, 3% x4 in. Two required with each card. Per dozen Net 3783. SUDE BINDING-, in strips, one strip required with each card. Binder's black cloth, heavily gummed on one side with a special gum. Per 50 strips ■^^"'■ .Net 1.80 .20 .15 No. 9410B. 9410B. LOPPING SHEAK, blades of English steel, with 2% in. cut. Length, 27 in REPAIRS FOR FACILE, JR., BABCOCK TESTERS These repairs are for Nos. 5056, 5056A, and 5057, page 85; and Nos. 9613, 9615, and 9616, page The numbers in parenthesis are the manufacturer's numbers, which in some instances appear on the parts. 9607. COVER, with thumb screw and collar. This is the part of the gear case which attaches to the table. (452-1) Net 9607D. CASE. This is the front of the gear case on which the name "Facile" appears. (451-1) Net 9607E. THUMB SCREW. (454H) Net 9607r. SWIVEL or collar for thumb screw. (454G) . . .• ' Net 9607G. SCREWS for cover. (4541) Net 9607H. CRANK only, without handle. (453) Net 9607J. CRANK, complete with handle. (454E) Net 9607K. WOOD HANDLE for crank. (454D) Net 9607L. HANDLE RIVET. (454C) Net 9607M.CRANK SHAFT. (454B) , Net 9607N. TAPER PIN for attaching crank to crank shaft. (454F) Net 9607P. GEAR for inner end of crank shaft (454) Net 9607R. WORM SPINDLE, with slot at top for head. (454A) Net 9607S. BALL for bearing. (454J) Net 9607T. TWO-BOTTLE HEAD, with rivets and pins but without cups or cup holders. (455). Net 9607TJ FOTJR-BOTTIiE HEAD, with rivets and pins, but without cups or cup holders. (456) .Net 9607v! CUP HOLDER AND BRASS CUP. (457-457A) Net 2.5C 87. .5 .6 .1 .0 .0 .2 .2 .0 .0 .1 .0 .7 .3 .0 188 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. jf ^ -HEIGHT - 9516. MEASURING CALIPER AND STANDARD COMBINED, Uni versity of Wisconsin design. May be used as a caliper for measuring girths and lengths of animals or as a standard for measuring the height of animals. For the latter purpose, the horizontal arm is pro- vided with a spirit level to insure correct reading. Graduated in cen- timeters and millimeters, beginning with zero at the fixed caliper jaw on one side of the measuring stick for caliper measurements, and with zero at the extreme end of the stick on the other side for height measurements. The movable jaw is held by a spring, and is reversible for use in height measurements, as shown in the illustration. Two sizes are provided; one for large and one for small animals. Length of graduated part, cm 100 Length of jaws, in 18 Each $ 5.50 lOfc'iflliiu'j/ s No. 9516 (Two Sizes). 9518. No. 9518. ANIMAL MEASURING CHAIN, designed in the Department of Dairy Husbandry of the University of Missouri, for taking accurate cross sections of the bodies of animals, or of the external shape of any parts of the bodies. This chain is constructed of short links so fastened together that it is sufficiently rigid to hold any shape given It, and yet sufiBciently flexible to adapt itself to the shape which it is desired to meas- ure. It IS 150 cm. long, which makes it possible to measure the heart girth of the largest cattle by the method described below. In taking the cross section outline of a large animal, a string is first placed around the body at the point where the measurement is to be made, and a chalk mark is drawn coincident with the location of the string. The chain is then applied over the chalk mark taking one-half of the body at a time, and tightening the thumb screws so that the Cham retains the exact shape of the body. Opposite points on the body are best found by using No. 9516 or No. 9519 Calipers. After each measurement the chain is laid on a large sheet of paper, and the points which were in contact with the surface of the body are marked, ^f» the outline being filled in later from these points. $ 5.00 yWyW 9519. No. 9519. MEASURING CALIPER, for taking measurements at points on the body of animals which cannot be taken by other instruments. Designed particularly for use in connec- tion with No. 9518 Animal Measuring Chain, to get the' distance from one side to the other ot the animal's body. The arms of the caliper are jointed so that it is possible to take measurements at points which could not be reached by calipers of other designs. CENTRAL, SCIENTIFIC CO., CHICAGO, U. S. A. 189 E''^"'";Pff1^'^>CEHTHffiSCIENTIFICCa.'5 No. 95990. No. 129. 9S99C. KILLING KINIFE, Poultry, of finely tempered steel, with niekel-plated handle; blade sharpened on one edge .'.\ Net $ 0.50 129 A. CALIPEE, Poultry, for use in studying the' "growth of chickens from hatching until ma- turity. With this caliper, depth and length of body, length of shank, etc., may be measured. Of steel, with jaws 2% in. long. Graduated in millimeters, with vernier reading to lOths, on one side; and on the other side on one edge in 16ths of an inch, with vernier reading to 128ths, and on the other edge in 20ths of an inch, with vernier ; reading to lOOths. length of graduated part, 8 inches and 200 mm 129. CALIPER, Poultry. Similar to No. 129A, but shorter and graduated only in the metric system, with vernier reading to lOths of millimeters. Length of graduated part 10 cm. 960r-9607V. EEPAIR PARTS for Facile, Jr., Babeook Testers, see page 187. 4.45 1.25 ' |l|llMlcENTRAl!!sCIEHTIFIi:lcol'{!|i||{M{' |||ll» " ^ H I III til II Ml I tllllJI I i It \l\tm Mil »lllll I I " ' ''''" No. 9790A. 9790 A. HYDROMETER, Lime-Sulphur (Li-Sul-Sprayometer), New York and Pennsylvania Pat- tern, for testing the lime sulphur wash used in spraying. Graduated from 0° to 38° Baume in %° divisions, and from 1.000 to 1.100 Specific gravity in .001 graduations.. .90 • A DAIRY COW ~mM=.- a 29 D ^A, = ™.Y CRUC^tjESTS RCT TD puoiuM or cow SHowmo poihtl I n - No. 9900— Chart No. 1. 9900. AGRICULTURAL CHARTS, on cloth, 3 feet 6 inches by 2 feet 4 inches. These charts were designed by Prof. G. A. Bricker of Ohio State University, and the diagrams are sufficiently large to be clearly seen across a large schoolroom. The series includes the following 10 charts: 1 — The Dairv Cow. 5 — The Hog and the Sheep. 9 — Corn. 2— The Beef." 6— The Walking Plow. 10— Wheat. 3 — The Horse. 7 — Spraying. 4 — The Chicken. 8 — Grafting. Complete with eyelets for hanging. Per chart Net .50 190 CENTRAL SClEXTiriC CO., CHICAGO, V. S. A. No. 9618. No. 9034. INTERNATIONAL CENTRIFUGES FOR MILK TESTING AND MECHANICAL ANALYSIS OF SOILS MILK TESTING 9618. BABCOCK MIIiK TEISTEB, International, Electric, 8-bottle size. The motor is entirely- enclosed in a massive bell shaped pedestal easting, and the head and cups are designed to give strength, durability, simplicity, and convenience of manipulation. For use with regular 6-inch Babcoek test bottles, but not with 9-inch cream test bottles. 18 inches high closed, 28 inches high open, and 17 inches in diameter, with a shipping weight of about 160 pounds. Furnished with trunnion cups and speed control rheostat, but without glassware. Voltage 110 D. C. 220 D. 0. 110 A. C, 60 cycles. 220 A. C, 60 cycles. Each Net $54.00 58.00 60.00 65.00 9618A. BABCOCK MILE TESTER, International, Electric, 16-bottle size. Similar in general description to No. 9618 and for use with regular 6-inch Babcoek test bottles. 9-inch cream test bottles may also be used if No. 9619 Cups with No. 9619A Trunnion Eings are purchased. 23 inches high closed, 35 inches high open, and 24 inches in diameter, with a shipping weight of about 300 pounds. Furnished with trunnion cups and speed control rheostat, but without glassware. Voltage 110 D. 0. 220 D. C. 110 A. C, 60 cycles 220 A. C, 60 cycles. Each Net 76.0.0 80.00 105.00 107.00 ACCESSOEIES FOB, INTEBNATIONAl BABCOCK MILK TESTERS. 9619. METAL CUP for 9 in. Babcoek bottles Net $ 0.75 9619A. TEtnSTNION KING for No. 9619 Metal Cup Net .35 For GLASSWARE and OTHER ACCESSORIES see pages 87-98. MECHANICAL ANALYSIS OF SOILS 9034. CENTRIFUGE, International, Electric, with equipment for mechanical analysis of soils, including speed control rheostat, No. B1238 Eight-tube Head, eight. No. B1288 Metal Tubes, 100 c. c, with No. B1289 Trunnion Eings, 72 No. B1318 Plain Glass Tubes, 100 c. c. and an 8-tube Eack. 23 inches high closed, 35 inches high open, and 24 inches in diameter, with a shipping weight of about 300 pounds. Voltage 110 D. G. 220 D. C. 110 A. C., 60 cycles. 220 A. C, 60 cycles. Each Net 80.00 84.00 101.00 104.00 B1318. TUBES, Glass, plain lipped, 100 c. c, for No. 9034 Centrifuge. Per dozen, Net 1.75; per 6 dozen .Net 7.00 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 191 No. 3802E. No. 4568. No. 4615. No. 4615A. 3802K. BATiANCE, Analytical, in polished mahogany case, with glass on four sides and the top. The beam is of aluminum, 6 inches long, graduated in 50 divisions from center to each end, and with convenient rider arrangement; index plate graduated in red. The bear- ings and knife edges are of agate; has 4% inch bows, and pans 2% inches in diameter with improved arrangement for arrest. Capacity 100 grams; sensitive to %o milligram. $ 55.50 3802L. EAIiANCS, Analytical. Same as No. 3802K, but with heavy iDlack plate glass base over the mahogany base 65.50 3802M. BALANCE, Analytical. Same as No. 3802K, but sensitive to %o milligram 80.00 3802N. BAIiANCE, Analytical. Same as No. 3802M, but with heavy black plate glass base over the mahogany base 90.00 3802P. BAIiANCB, Analytical. Same as No. 3802K, but sensitive to i^o milligram 100.00 3802Q. BAIiANCE, Analytical. Same as No. 3802P, but with he^yy black plate glass base over the mahogany base 110.00 3902K. WEIGHTS, Precision, similar to No. 3902 (page 129), but with the weights carefully lacquered instead of gold plated. This avoids the high duty on gold plated articles un- der the TarifE Act of 1913. Many laboratory experts consider the lacquered finish pre- ferable to gold plating Net 3904K. WEIG-HTS, Precision, similar to No. 3904 (page 129), but carefully lacquered, as de- scribed under No. 3902K Net 4568. BOTTLES, Washing. Same as No. 4567 (page 135), but with wicker covered neck, for use with hot water. Capacity, ounces 16 Each 70 4614D. BUBETTES, Mohr's, same as No. 4614 (page 139), but vith side tube for refilling. Capacity, c. c 25 50 Graduated to ^o Mo Each 85 1.20 4615. BtTBETTES, Schellbach's, with white back and dark colored lines, showing the meniscus plainly. With tip and connection for pinchcock, but without pinchcock. 12.00 10.00 32 .90 100 Mo 2.00 50 Mo 1.33 100 Mo 2.25 50 Mo 2.20 Capacity, e. e 25 Graduated to Mo Each 1-00 4615A. BUBETTES, Schellbach's, same as above, but with glass stop cock. Capacity, c. e 25 Graduated to Mo Each 1-67 4615B. BURETTES, Schellbach's, same as No. 4615, but with side tube for refilling. Capacity, C.C 25 50 Graduated to Mo Mo Bach 1-20 1.50 4615C BUBETTES, Schellbach's, same as No. 4615, but with Greiner and Friednch's three-way Stopcock. Capacity, c. c 25 50 Graduated. to Mo Mo Each 2-00 2.50 100 Mo 3.00 100 Mo 2.45 100 Mo 3.35 1!)2 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. No. 5054A. No. 4739. No. 4807A-B. 5054;A. BTJKNER, Alcohol Lamp, noiseless, economical, and safe. Used on Moisture Testers. Burns with intensely hot blue sootless flame, with denatured alcohol as the fuel. Burns 3 hours at one filling. Excellent for laboratory use when gas is not available . . | 4739. CLAMP, Flask, for large tubes and flasks, of wood, 10% inches long, with spring 4807A. CKtrCIBLES, Royal Berlin Porcelain, glazed inside and outside, without cover. No 000 00 1 2 3 4 5 Capacity, c. c 5 10 15 30 57 95 155 280 Diameter, mm 26 30 35 41 52 62 72 87 Height, mm 19 25 27 35 43 50 59 72 Each $0.13 .16 .20 .28 .36 .45 .55 .66 4S07B. CRUCIBLE COVERS, Royal Berlin Porcelain, for No. 4807A Crucibles. No 000 00 1 2 3 4 5 Each 07 .07 .07 .10 .10 .14 .18 .21 3.00 .45 IE No. 4837. No. 4842. No. G171. 4S37. DESICCATORS, Scheibler's, of Bohemian glass, cover ground air-tight. (The 8 in. size is new.) Diameter, inside, inches ■ 3% 5 6 8 Each 60 1.00 1.20 2.50 4838. DESICCATORS, Scheibler's. Same as No. 4837, but with tubulature on the side. Diameter, inside,- inches 6 8 Each 1.95 3.20 4842. DESICCATOR PLATES, of porcelain, with three small feet and with 3 to 8 holes, ac- cording to size of plate. (The 7% inch size is new.) Diameter, inches 3% 4% 5% 7% Each 67 .84 1.10 1.65 4842A. DESICCATOR PLATES, Porcelain, with 7 holes, each 26 mm. in diameter. Diameter, inches 4% 5% Each 1.00 1.20 G171. DISH, MILK, Royal Berlin Porcelain, for quickly reducing large amount of sample to ash; flat bottom, straight sides; inside dimensions, diameter 67 mm., depth 13 mm... 4875B. EXTRACTION APPARATUS, Soxhlet's. Same as No. 4875 (page 63), but with all joints ground air-tight. Complete with three flasks and condenser, but without extrac- tion shells. Capacity to top of siphon, o. c . . , 60 100 Each . 4.25 5.00 48 79C. EXTRACTION SHELLS, Paper, same as No. 4879 (page 64), but double thick; 22 mm. in diameter by 80 mm. long. Each, Net 0.18; per dozen Net 4906A. FLASKS, Kjeldahl's, digesting, pear shaped, with extra long necks, new .Jena glass. (The 800 c. c. size is new.) Capacity, c. c 200 500 800 1000 Each 23 .40 .50 .60 4906B. FLASK, Kjeldahl's, short neck, new .Jena glass, 800 e. c. 3.31 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 193 No. G421. No. 5125. G421. OVEN, Electric Drying, patented Jan. 6th, 1914, with automatic temperature control. The chamber of the oven is 10 inches high, 12 inches wide and 10 inches deep. Weight, 231/^ lbs,; arranged for 110 or 220 volt's direct or alternating current. (In ordering, state voltage desired.) Complete with three shelves, thermometer, six foot cord and plug, and full directions Net $ 25.00 5125. PIPETTESi Bailey's Automatic, for delivering quickly an approximately constant amount of a reagent. Since two measuring vessels are furnished, there is no waste of time in waiting for the apparatus to refill. The volume of the pipette is governed by raising and lowering a sliding capillary tube, so that it is possible to use a pipette of 100 c. c, for example, for smaller amounts when desired. Mounted on board for at- taching to wall. Graduated capacity, c. c 50 100 Each Net 0.00 9.00 fi No. G461. G461. SAMPLER, Bag, for sampling small seeds in sacks. By means of its sharp and slender point, the sampler can be thrust through the mesh of bagging, forcing it apart without tearing. %2 ^^- diameter, 4% in. long; each Net G462. SAMPLES, Bag, similar to No. G461, but for grain; % in. diameter, 6 in. long; each. Net No. G463. G463. SAMPLERS, Grain. These samplers consist of two polished brass tubes, one fitted in- side of the other, and having openings matching each other. By turning the handle of the inner tube, it revolves, thus-opening and closing the holes. No 2 3 4 Diameter, inches 1% 1% 1% Length, inches 44 44 52 Each Net 6.00 6.75 7.50 ■181 No. 5265. No. 5266. 5265 SPATULAS, Steel, wooden handle. (The 8 and 10 inch sizes are new.) Length of blade, inches 3 4 5 6 8 10 ^ach 22 .27 .30 .42 .55 .83 5266. SPATULA, Steel, wooden handle, flexible narrow point, for weighing. Length of blade, 5420. TONGS, Crucible, Steel. Double. bend, forged, nickel-plated, with lock joint. Length, 18 inches , ,, FITTINGS FOR Nos. 4858-4860B DRYING OVENS (Page 157) G425 WATEK GAUGE, fitted to any of the above double wall ovens, extra G426. WATEK LEVEL, Kekule, fitted to any of the above double wall ovens, extra. .3J 1.5( i.o; 1.6! I!t4 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. INDEX Abney's Level 74 Absorption Apparatus 5 Accident Cabinet 170 Acetylene Gas Burner 139 Acid Bottle 89 Acid Bottle Trunnion 89 Acid Burettes 89 Acid Dippers 89 Acid Gloves : 151 Acid Measures 89 Acid Pipettes 89 Acid, Sulphuric 87 Acidity Tester for Soils 33 Acidometer 87 Acid Tests 96 Agricultural Charts 189 Agricultural Lantern Slides 111-118 Agricultural Text Books 172-182 Alarm Thermometer, Automatic 108 Alcohol Burners , 140 Alcohol Lamps 153, 192 Alfalfa Samples . . . . , 59-61 Alkalimeters 9 Alkaline Tablets 96 Ames Moisture Test 96 Anatomical Charts 81 Anatomical Models 80-82 Animal Husbandry 77-84 Animal Measures 79, 188 Aprons 119 Arrows, Surveyors' 107 Asbestos Drying Oven 158 Asbestos Gloves '..... 151 Asbestos Plates or Pads 170 Aspirators 6, 147 Aspirator Bottles 6, 135 Augers, Soil 24, 183 Auger, Soil Tube 40 Auger Field Sets 25 Automatic Alarm Thermometer 108 Automatic Oil Measuring Device 185 B Baboook Milk and Cream Testers 85-87, 190 Babcock Test Bottle Rack 93 Babcock Test Traveling Outfits 87 Bacteriological Soil Sampling Tubes 183 Bailey's Pipettes 193 Balances 90, 120-128, 191 Ball Mills 18 Balls for Mills 18 Barley Samples 53,57,58 Barley Score Cards 62 Barrel Cart 101 Barrel Sprayer 101 Battery, Dry 32 Battery Jars 152 Beakers 131 Beaker Brush 138 Beans, Samples 60 Bellows 132 PAGE Benningsen's Flask 14 Bins, Soil 7, 8 Blast Lamps 132, 133 Block Microscopes 156 Blotters 170 Blow Pipes 133 Board Rule 76 Boats, Combustion 144 Bolting Cloth, Silk 30 Books 172-182 Bordeaux Nozzle 102 Botanical Mounts, Riker's 104 Bottles 134-137, 191 Bottle, Acid 89 Bottle, Aspirator <> Bottle, Butter Test 88 Bottle, Mechanical Analysis of Soils 8 Bottles, Milk 90 Bottles, Milk and Cream Test 88 Bottles, Screw Cap 90 Bottles, Sterilizer 28 Bottom Pans for Sieves 31 Bottom, Perforated, for Soil Tubes 37 Brain of Horse, Models 80 Brain of Ox, Model 81 Briggs' Filters 16 Brushes 26, 39, 91, 138 Bucket Sprayers 99 Buckwheat Samples 60, 61 Budding Knives 71, 72 Budding Tool 73 Bunsen Burners 139, 140 Burettes 89, 139, 191 Burette Brush 138 Burette Clamps 142 Burette Floats 139 Burette Supports 166 Burners 139,140,192 Burners, Barthel's 14(1 Butter Fat Oil Test Tubes 98 Butter Refractometer 94 Butter Test Bottle 8S C Cabinet, First Aid 170 Calcium Chloride Tubes 141 Calipers, Animal 18S Calipers, Poultry , 18S Calipers, Tree 7< Calorimeter 3i Camel Hair Brushes 13i Candles 17( Capillarity Tubes, Soils 36-38, 18^ Capillary Tubing 15( Caponizing Sets 8< Caps for Milk Jars 9( Carbon Filters 14' Carbonic Acid Apparatus 9, 141 Carborundum Paper 175 Carrying Case for Augers 2! Casein Tube 91 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. 195 INDEX— Continued PAGE Casseroles 142 Cattle Instruments 83, 84 Cattle Score Cards 79,95 Celluloid Strips for Soil Tubes 36, 184 Cement 170, 171 Centrifugal Machines 9, 10, 85-87, 190 Chain Tapes 106 Chalk Line ■. 170 Chamois Skins 170 Charts, Agricultural 189 Charts, Milk Record 126 Charts, Veterinary 81 Cheese Cloth 170 Chemical Apparatus and Supplies 119-169 Chemical Balances 120-122, 191 Chemical Labels 152 Chemical Reagent Bottles 136,137 Chemicals See Catalog R. Chemical Thermometers 167 Chevalier's Creamometer 92 Chisel, Grafting 73 Churns, Family 91 Circulatory System of a Ruminant, Chart. 81 Clamps 142, 143, 192 Clinometers 74 Cloth, Emery 170 Cloth, Silk Bolting 30 Cloth, Tracing 170 Clover Samples 59-61 Collecting Trowel 46 Collection, of Hoofs of Horses, Models. ... 80 Color Tray 35 Colored Glasses, Lovibond's Standard.... 11 Colorimeters 11 Combined Acid Bottle 89 Combustion Boats 144 Combustion Tubes 144 Combustion Tubing 150 Compacting Machine 12 Compactor, Spring , Board 12 Compasses, Surveying 75 Compound Microscopes 154, 155 Condensers 21, 144 Condenser Bulb Tubes 43 Condenser Clamps 143 Condensers, Kjeldahl's 42 Condenser, Knorr's 64 Condensers, Soxhlet's 64 Condenser Tube 185 Conductivity Apparatus 13 Conductivity Bridge ■• • 32 Container, Grain ■ 46 Containers, Soil ''. 8 Cord I'^O Corks 144 Corn Samples 54, 55 Corn Score Cards 62 Corn Test Sieves 49, 185 Corrosive Sublimate Tablets 93 Cotton Discs 9'' Cotton Samples 60, 61 Cotton Score Cards 62 Counter Brush 138 Couplings for Filter Pumps 147 Covers for Sieves 31 Cow Models ^1 PAGE Crash Toweling 171 Cream Balance, Hydrostatic 90, 126 Cream Pipettes 93 Cream Score Cards 95 Cream Test Balances 125. 126 Cream Test Bottles S8 Cream Test Tubes 98 Cream Testers 85-87, 190 Creamometer 92 Crucibles 145, 192 Crucible Tongs 168, 193 Crystallizing Dishes 146 Cup for Water Retention 40 Cylinders, Graduated 151,185 D Dairy Cattle Score Cards 95 Dairy Husbandry 85-9S Dairy Thermometers 9S Decimal Milk Balances I2t Desiccators 145, 19S Digesting Flasks 43, 14i Digesting Shelves 41, 4! Digestion Cups, Porcelain. ._ i; Dippers, Acid 8i Dipping Refractometer 9' Dirt Scale 5( Discs, Absorbent Cotton 9' Diseases of Plants 18; Dishes 91, 146, 19i Dispensing Scale 12i Dissecting Microscopes 15( Distillation Apparatus '. 4! Distilling Flasks 43, 141 Dividers 9 Doublet Magnifiers 15 Double-Tree Apparatus 7 Draft Determination Apparatus 77, 7 Drainage Apparatus 1 Drainage Trays 3 Drawing Pencils 17 Driving Heads 39, 183, 18 Dropping Funnels 21, 14 Drying Ovens 157-161, 19 Drying Tables 15 Drying Tower 14 Drying Tubes 21, 14 Dynamometers 7 e: Ear of Horse, Model 8 Egg Score Cards i Electric Baboock Milk Testers 6 Electric Heaters ( Electric Muffle Furnaces ] Electric Ovens 158-161, 1! Electric Signalling Device for Moisture Testers Elutriating Flask Emery Cloth Emery Paper Erdmann's Floats Erlenmeyer Flasks Evaporating Dishes Evaporation Gauge 196 CENTKAL SCIENTIFIC CO., CHICAGO, U. S. A. INDEX— Continued Evaporation Tank Evaporlmetera Extensions for Augers Extraction Apparatus 63-G Extraction Flasks 6 Extraction Stiells 6 Extraction Tubes Extractors Eye of Horse, Models Eyepiece Micrometers PA OK 15 15 25 , 192 , 149 . 192 3. 64 63, 64 80 166 Family Churns 91 Family Scale ' 128 Farm Crops Laboratory Material 63-61 Farm Meteorology 108, 109 Farm Surveying 106-107 Farm Levels 105, 106 Fat Free Paper for Milk Analysis 92 Fertilizers 62 Files 146 Filters, Briggs' i . 16 Filter Field Sets 16 Filter Paper 147 Filter and Pump 16 Filter Pumps 147 Filter Tubes 16, 147 First Aid Cabinet 170 Flask Brush 138 Flasks 21, 43, 47, 148, 149,192 Flask, Elutriating 14 Flasks, Extraction 64 Flasks, KJeldahl's 43, 148 Flasks for Moisture Testers 47 Flax Samples . 60, 61 Flax Score Cards 62 Floats, Erdmann's Burette 139 Flower Pots and Saucers . . . 51 Foetus of Ox, Model 81 Foetus of Sheep, Model ; . . . 81 Foetus of Swine, Model 81 Foot of Ox, Model 81 Foot Plate 25 Forceps 149 Foresters' Instruments 74-76 Freas' Electric Ovens 160 Fresenius' Nitrogen Apparatus 43 Friedrichs' Extraction Apparatus 63 Frost Predictors 108, 109 Fruit Jars 171 Fruit Score Cards 62 Funnel Brush ; 13S Funnels 21, 149', 150 Funnel Scoop and Counterpoise 127 Furnaces, Muffle 17 Fused Silica Ware ' 145, 146 Gas Bags Gasoline Blast Lamps 132, Gasoline Burners Gas Stoves Gas Washing Bottles Gauge, Evaporation Gauze, Wire 150 133 140 140 135 14 150 PACE General Apparatus and Supplies 119-171 Genitals of Mare, Model 80 Genitals of Stallion, Model SO Germinating Boxes 44 Germinating Plates 45 Germinating Trays 45 Germination Model 44 Glass Beads 150 Glass Plates 162 Glass Rods 150 Glass Tubing 150 Gloves 151 Glue 171 Gooch's Crucibles 145 Grade-Draft Apparatus 78 Graduated Tubes for Colorimeter 11 Graduates 151, 185 Grafting Chisel 73 Grafting Knives 72 Grafting Models 66 Grafting Wax 73 Grain Container 46 Grain Samplers 193 Grain Samples 53-61 Grain Score Cards 62 Grain Test Balances 127 Grain Tester Fillers 50 Grain Testers 49. 50 Grasses 54, 59, 61 Grinding Mills 18-20 n Hart's Casein Tube 91 Head of Horse, Model 80 Head of Ox, Model 81 Heart of a Horse, Model -. 80 Heat Absorption Boxes 6 Heaters, Electric 65 Hofmann's Clamps 142 Hog Score Cards 79 Hogs, Models 82 Hoist, Soil Sampling Tube 26 Hoofs of Horse, Models 80 Horn Spoons 164 Horse Hair Sieve 96 Horse Measure 79 Horse Score Cards 79 "Horses, Models 80,82 Horticultural Hygrometer 109 Hose and Nozzle for Sprayer 101 Hot Plates 151 Hydrometer Jars 92, 152 Hydrometers 92, 102, 189 Hydrostatic Cream Balance 90, 126 Hygrometer 109 Hypsometer 75 I Ignition Tubes 167 Increment Borers 76 Insecticides ,-. 102 Insects, Life Histories. ,..:. .t,!.".':: 103,104 Intestinal Canal of Horse, Model,,, 80 Intestinal Canal of Ox, Model -81 CENTBAL SCIENTIFIC CO., CHICAGO, U. S. A. 197 INDEX— Continued PAGE Jars 27, 90, 92, 152, 171 Jar with Drainage Outlet 22 Jelly Tumblers 171 K Kekulfe's "Water Level Kidney of Ox, Model Kidney of Horse, Model . . . . King's Soil Sampling Tube. 193 81 80 26 Kjeldahl's Apparatus 41, 42 Kjeldahl's Flasks '. .• 43, 148, 192 Knapsack Sprayer 99 Knife, Killing 189 Knives, Budding and Grafting 71, 72 Knives, Pruning 69, 71, 72 Knorr's Extraction Apparatus 64 Labels, Gummed Labels, Plant and Tree Laboratory Aprons and Sleeves. Laboratory Balances Lactometers 152 52 119 123 92 Lamps, Alcohol 153, 192 Lamps, Blast 132, 133 Lamp Caps 153 Lamp Wicks 153 Lamp Wick Holders 153 Lantern Slides 111-118 Larynx of Sheep, Model 81 Lead Dishes 146 Lead Shot 78 Lead Tubing 43 Legumes 54, 59-61 Levels, Farm Surveying 105,106 Lever tor Removing Sampling Tubes from the Ground 26 Library Paste 171 Life Histories, North American Insects. . .103, 104 Lime-Sulphur Hydrometer 102, 189 Linen Testers '. Litmus Paper . . Litmus Pencils Log Rules 156 167 162 76 Lopping Shear 70, 187 Lovlbond's Standard Colored Glasses Lung of a Ruminant, Model M Magnifiers Mallet Marine Glue Market Cream Score Cards Marschall Testing Outfits 9 Mason Fruit Jars Matches, Swedish Safety Maul McCall's Aspirator McCall's Capillarity Tube McCall's Specific Heat Apparatus Measuring Chains Measuring Standards 7!) •iMeasuring Tapes 76, 79 :i(M6chanical Analysis Boj;tle •t Mechanical Shakers 28, Medicine Droppers 11 81 156 73 171 95 , 97 m 171 39 6 36 33 188 188 107 8 29 162 PAGE Metal Bolting Cloth 30 Meteorological Instruments 108, 109 Metric and English Pocket Tape 79 Metric Linen Pocket Tape 79 Micrometers, Eyepiece 156 Micrometer, Stage 156 Microscopes 154-156 Microscope Slides no Milk Analysis Apparatus 85-98 Milk and Cream Testers 85-87, 190 Milk Balances ijg Milk Dishes 91, 146, 192 Milk Fever Apparatus 84 Milk Jars 90 Milk Pipettes 93 Milk Record Charts. 126 Milk Scales 95, 126 Milk Test Bottles 88 Milk Test Traveling Outfits 87 Milk Tester Repairs 187 Milk Testers 85-87,93,190 Millet Samples 53, 59 Mills, Ball '. 18 Mills, Grinding and Pulverizing 18-20 Mimicry in Insects 104 Miscellaneous Supplies 170, 171 Models of Cows 81 Model of Germination 44 Models of Hogs 82 Models of Horses 80, 82 Models of Oxen §2 Model of Propagation 66 Models of Sheep 82 Models of Thoroughbred Animals 82 Mohr-Geissler Potash Bulb 21 Mohr's Burettes 139, 191 Mohr's Clamps 143 Moisture Absorption Apparatus 5 Moisture Equivalent Centrifuges 10 Moisture Test, Ames 96 Moisture Test Balance 127 Moisture Testers 47 Moisture Tester Accessories 47, 185 Molds for I'lasticity Apparatus 23 Mortars 153 Moss, Sphagnum 62 Motors 28 Mounting Materials for Seed Specimens.. 187 Mounts, Entomological .- 104 Muffle Furnaces 17 Muffles 17 Mulch Cylinders 21 N Nessler's Jars 152 Nets for Blast Bellows 132 New York State Lactometer 92 Nitrogen Determination Apparatus 41-43 Nitrometer 43 Nozzles for Sprayers 102 O Oats, Samples sg Oats Score Cards 62 Oblong Telescoping Sieves igg Oil for Moisture Testers igg 198 CENTRAL SCIENTIFIC CO., CHICAGO, U. S. A. INDEX- PAGE Oil Measuring and Grain Separating Device 185 Oldberg's Percolators 23, 162 Organic Matter Determination Apparatus. 21 Organic Matter Jar 22 Organic Matter Tube 38 Ovens, Drying 157-161, 193 Over-sleeves 119 Oxen, Models 82 P Pans 22 Paper, Carborundum and Emery 171 Paper, Fat Free 92 Paper, Filter 147 Paper Flower Pots 51 Paper, Litmus 167 Paper, Sand 171 Paper Tags 52 Parafflne Candles 170 Paste 171 Pasteur-Chamberland Filter Tube 16 Pasteurizing Outfit 92 Pasteurizing Thermometer 98 Pathological Slides 110 Peas, Samples 60 Peligot Potash Tube 21 Pencil Brushes 138 Pencil, Blue 162 Pencils, Drawing 171 Pencil, Litmus 162 Penetrometer 22 Percolation Apparatus 23 Percolation of Air Tube '. 38,40 Percolation of Water Tube. . . , 38, 40 Percolators 23, 162 Perforated Bottom 37 Perforated Cards 187 Pestle, Rubber 23 Picture "Wire , 171 Pinch Cocks 143 Pioscope 93 Pipettes 89, 93, 162, 193 Plant Disease Collection 186 Plant Food 62 Plant Labels 52 Plasticity Apparatus 23 Plates, Germinating 45 Plates, Glass' 162 Platform Scales 128 Pneumatic Troughs 168 Pocket Magnifiers. 156 Pocket Tapes 79 Porcelain Balls 18 Potash Bulbs and Tubes 21 Potassium Hydrate Flask 21 Potato Score Cards 62 Poultry Instruments 84, 189 Preservatives 93 Propagating Knife 72 Propagating Sand 6 2 Propagation Chart 66 Pruning Tools 67-72, 187 Puddling Tray 35 Pulverizing Mills 18-20 Pumps, Filter 147 -Continued a PAQG Quartz or Fused Silica Ware 145,146 Quevenne's Lactometers 92 R Rack for Test Bottles 93 Rafl^a 73 Reagent Bottles 136, 137 Receivers 162 Recording Thermometers 184 Refractometers and Accessories 94 Rennet Test * 97 . Repairs for Milk Testers 187 Retorts 162, 163 Retort Adapters 163 Retort Receivers 162 Retort Stands 165 Ribbed Funnels 149 Rice Samples 60, 61 Riders "■ ■ ■ ■ 130 Riker's Mounts 104 Rings, Iron 163 Ring Stands 165 Root Growth Box 44 Rubber Aprons and Sleeves 119 Rubber Bands 171 Rubber Cement 171 Rubber Discs for Bellows 132 Rubber Gloves 151 Rubber Pestle '. 23 Rubber Sprinklers 46 Rubber Stoppers 163, 185 Rubber Tubing 164 Rules, Board and Log 76 Rye Samples 60, 61 S Safety Matches 171 Salt Test for Butter 97 Sample Carrying Outfit 27 Sample Bottles 90 Sample Boxes 27 Sample Jars 27, 90 Samplers, Grain 193 Sampling Cloth 26 Sampling Tubes 26, 36, 183 Sampling Tube Hoist 26 Sampling Tube Brush 26 Sand 62 Sand Baths '. 164 Sand Crucibles 145 Sand Paper 171 Sawdust 62 Saws, Pruning 68, 69 Scales 120-128 Schellbach's Burettes 191 SchifE Nitrometer 43 Scoops 8, 164 Score Cards, Cattle 79, 95 Score Cards, Dairy 95 Score Cards, Eggs 84 , Score Cards, Grain 62 Score Cards, Horses 79 Screw Cap Jars 27, 90 Screw Compressors 143 Sealing Wax 171 CENTRAL SCtENTIFIO CO., CHICAGO, U. S. A. INDEX— Continued 199 I'AGE Sectional Capillarity Tubes 37 Sediment Tester 97 Seeds of Farm Crops and Weeds 53-61, 1S6 Seed Culture Apparatus 44-65 Seed Mounting Materials 187 Seed Scale 50 Seed Test Balance 127 Seed Testers 48, 49 Separatory Funnels 149 Shakers 28, 29 Shears, Pruning 67, 70 Sheep, Models 82 Sheep Score Cards 79 Shot, Lead '. 78 Shrinkage Apparatus for Soils 183 Sieves 30, 31, 49, 95, 185 Sieve Shaker 29 Sieve Without Bottom 30 Silk Bolting Cloth 30 Skim Milk Test Bottle 88 Sleeves 119 Slide Binding 187 Slide Coven Glasses 187 Slide Rule or Scale, Richmond's 95 Slides, Microscope 110 Soil Acidity Tester 33 Soil Analysis Apparatus 5-43 Soil Auger Field Sets 25 Soil Augers 24, 183 Soil Balance , 124 Soil Bins 7, 8 Soil Boxes and Cans 5,22,27 Soil Carrier 27 Soil Centrifuges 9, 10, 190 Soil Conductivity Bridge 32 Soil Fertility Apparatus and Supplies.... 44-65 Soil Pans 5, 22 Soil Sampling Tubes 26, 183 Soil Sampling Tube Hoist 26 Soil Shrinkage Apparatus 183 Soil Sieves 30, 31 Soil Thermometers 35 Soil Tubes 37-40 Soil Tube Auger 40 Solder 171 . Solid Flame Burner 140 Solution Scales 124, 128 Sorghum Samples 60 Soxhlet's Extractors 63, 192 Soxhlet's Drying Ovens 158 Spatulas -. 164, 193 Specific Gravity Tubes 39, 184 Specific Heat Apparatus 33 Specimen Mounts 104 Spence's Lactometers S2 Sphagnum Moss 62 Splints 171 Sponges 171 Spoons 164 Sprayers 99-102 Sprayometers 102, 189 Spring Board Compactor 12 Sprinklers *^ Sprouting Apparatus 46 Sprouting Cup *5 Sprouting Media 62 PAGE Stage Micrometer 156 Standard Colored Glasses, Lovibond's. . . . 11 Steam Baths 169 Sterilizer Bottles -....., 28 Sterilizing Outfit 92 Stirring Rods DC, 97, 150 Stomach of Ox, Model 81 Stomach of Sheep, Model 81 Stop Cocks 165 Sulphur Determination Apparatus 185 Sulphuric Acid 87 Supply Tank , .' 40 Support, Aspirator 6 Supports for Soil Tubes , 38 Support Frame for Soil Tubes 37 Supports 165, 166 Supports, Test Tube 166 Surface Soil Tubes 39 Surveying Compasses 75 Surveyors' Chain Tapes 106 Surveyors' Arrows 107 T Tablets, Alkaline 96 Tablets, Corrosive Sublimate 93 Tags, Brass 171 Tags, Paper 52 Tank Sprayer 100 Tanks, Water 15, 34 Tape, Grafting 7S Tapes, Measuring 76, 79, 107 Tapes, Surveyors' Chain IOC Tapers, Wax 171 Teeth of Horse, Models 8C Tenacity of Soils Apparatus 3^ Test Bottles 8! Test Bottle Raqk . . . '. 9! Test Bottle Testers 9! Test Paper 16' Test Tubes 98, 16^ Test Tube Brushes 131 Test Tube Clamps or Holders 14; Test Tube Supports 16( Text Books 172-181 Thermal Conductivity of Soils !'■ Thermometer, Automatic Alarm 101 Thermometers, Chemical 16' Thermometers, Dairy 9 Thermometers for Moisture Testers 181 ThermomBter, Pasteurizing 91 Thermometers, Soil 35, 18' Thermometer, Veterinary 8 Thermometer, Wollny's Refractometer. . . 9 Thermo-Regulator 15 Thistle Tubes 15i Tongs, Crucible 168, 19 Torsion Balances 125, 12 Towelling, Crash 17 Tracing Cloth 17' Tractor Sprayers 10 Tray, Color 3 Trays, Drainage ... 3 Trays, Germinating 4 Tray, Puddling 3 Trays, Water 3 Tree Calipers 7'