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G ^^ /■••'■- ^ ,0- •'-.'^o^ «s *y* . ^ - •'^-o'' r. ^'^ "^ ^'^^ ^^ b :; . ,'?>/" A-^^ ■ . ^V JV .\^ -5-^ FIRST CENTURY OF NATIONAL EXISTENCE; THE LTIsTiTED STATES THEY WERE AND ARE: Tee progressive devklopmext of MTXERAL WKALTH, ixclc:ding not oniy thk precious ant) the uskftl metals, B(n Coal, Petroleum, and the various Alkalies and Karths in usk : The PUBLIC UVXDS, their sales in each ts^ar Land Grants to Koads, Railroads, State, and Educational Purposes, their rapid settlement, the formation of States and Territories, founding of Cities and Commercial Centers : IXTERXAL TRADE ; I>DIKJRATIOX. ITS INCREASING TIDE AND TRE REGIONS MOSTLY SOUGHT BY IMMIGRANTS : BANKING, ITS SUCCESSIVE SYSTEM! AND changes: Firk, Life, Accidknt, AND other INSURAN'CE, with statistics; LITERATURE and ACTHOKS : HOOKS, PERIODICALS, and NEWSPAPERS ; The FINE ARTS, Painting, Sculpture, ARCHiTErrciiE, AND ENGRAVING; DOMESTIC LIFE, Dwellings, Furniture, Food, Costumes, &c". ; TELEGRAPH; EDUCATION, Higher and Elementary, Libraries, Museums, and Scientific Collections : BENEVOLENT and HUMANITARIAN INSTITUTIONS, &c. AN APPENDIX, The progress of all the RELIGIOUS DENOMINATIONS and SECTS, their prftLUR Doctrines and Ordinances, their Forms of Church Government, Mode of Worship. &c.. &c. THE whole carefully PREPARED BY %n ^mhtJiit Corps of Sc'itntrfic ;tnb |i^itetarn ^fii. Superbly illustrated with over Two Hundred and Twenty-Five Engravings, executed by the most accomplished Artists in the Countcy, carefully printed from Steel Electrotypes and in Chromo- ISold lOiiJ.y T^j'- »«j.l^fc»«2jrii^tloxi. ^i^hc HARTFORD. CONN.: a ' FRANWS DKWINr;* & CO., SAN FRANCISCO, CAL. 1874. EiitenJ, accoi'diug to Act of Congress, in the year 1872, hj- L. STEBBINS, hi tlie Office of the Librarian of Congress, at Washinirton. 4$l SUBJECTS AND AUTHORS. MINING INDUSTRY OP THE UNITED STATES, Including Gold, Silver, Copper, Lead, Zinc, Iron, Coal, Petroleum, &c., showing the Localities, Richness of Ores, Methods of Mining, Smelting, and applying the different Minerals to practical uses, with their values, &c., &c. FUR TRADE, various kinds and values of Furs. Of the late Pennsylvania, and other Geological Surveys; Contributor to Apple- ton's " New American Cyclopadia " on the same Subjects. LAND, SETTLEMENT, INTERNAL TRADE. Western Settlement, Population, and Land Sales, Canals and Railroads, Expenditures, Lake Cities, Reciprocity, Annual Sales of Land by the Government, River Cities, Atlantic Cities, Date of Settlement, Population, Valuation, Manufactures, Exports, Imports, Growth of New York, Express Business. BANKS, UNITED STATES MINT, AND INSURANCE. Bills of Credit, Government Issues, United Slates Bank, State Banks, Suffolk System. Safety Fund, Banks, Free Banks, Number of Banks in Each State, Aggregate Capi- tal, Clearing Houses, Private Banking, New National System, &c., Establishmeut of Mint, Standard of Coins, Laws Regulating Coinage, Precious Metals in the Coun- try, Insurance, — Fire, Marine, Life, Accident, &c. EMIGRATION. General Migrations. Colonies and United States, Number of Aliens arrived in the United States from 1820 to 18i)G, and their Nationalities, Landing in New York, Future Homes. AUTHORS, BOOKS, NEWSPAPERS, BOOK-BINDING. PRINTING PRESSES, TELEGRAPH. Writers, — including Theologians, Statesmen, Novelists, Historians, — Short Sketches of their Lives, their Literary Productions ; Newspapers, — Dailies, Weeklies, Periodicala, Book Trade, Publishing, Jobbing, Retailing, Selling by Subscription, Book-Bind- ing, Printing Presses, Telegraph. By THOMAS P. KETTELL. SOCIAL AND DOMESTIC LIFE. Domestic Architecture, Furniture, Food, Dress, Social Culture, &c. ByFREDERlCKB PERKINS. SUBJECTS AND AUTHORS. ARTS OF DESIGN. Painters, Sculptors, Engravers, &c. By T. ADDISON RICHARDS, Artist, Editor of Appleton's " Railway Guide,^' Correspondent of " Harper^» Magazine." , Progress of all the Religious Denominations, and Sects. By Dr. L. P. BROCK ETT. EDUCATION, Including the History and Statistics of Free Schools, Common Schools, Grammar Schools, Academies, Colleges, Professional Schools of Theology, Law, Medicine, War, Teacliing, Engineering, Agriculture, Mechanics and Fine Arts ; with Special Schools for Deaf Mutes, Blind, Idiots, Juvenile Criminals, and Orphans, and Supplementary Educational Agencies and Libraries, Lyceums, Lectures, &c. By HENRY BARNARD, LL. D., Superintendent of Common Schools in Connecticut and Rhode Island ; Chan- cellor of the Stale University of Wisconsin; and Editor of the ^^^ American Journal of Education." ELECTRIC TELEGRAPH, Its Inventors, and Progress, By GEORGE B. PRESCOTT. Electrician of Western Union Telegraph Company. FIRE INSURANCE, Giving in a historical form the progress and growth of Fire Insurance in the United States from the first organized Companies up to 1871, vv'ith valuable tables, showing the magnitude of the business, rates, losses, profits, &c., By D. A. HEALD, Vice-President of the Home Fire Insurance Company of If. Y. LIFE INSURANCE, Showing the progress of the business under the Stock and Mutual principles, fi-om the first organized Company up to 1871, with valuable tables allowing the irameusu magnitude of the business, per centage, losses, profits, &c., By JACOB L. GREENE, Secretary Connecticut Mutual Life Insurance Company, Hartford, Cl. CONTENTS MINING INDUSTRY. PAOE Introductory Remarks 17 Iron Worka in Virginia previous to 1622 17 First Blast Furnace in 1702 17 Ikon 18 First Trial of Anthracite Coal for manufac- facturing 18 Great Britian produces more than half of the whole product of the world 19 Iron produced from 1828 to 1840 20 Materials employed in the Manufactube. . 20 Ore in Pennsylvania, llaryland, Tennessee, New York, Canada, and Wisconsin 21 Consumption of Cliarcoal per Ton of Iron. . . 22 Quantities of Air used in Blast Furnaces 23 Furnaces in the Lehigh Valley 23 DlSTRIBLTION OF ORES 24 Ores in New Jersey 25 Ores in Pennsylvania 26 Great Chestnut Hill Ore-bed 27 Ores in Maryland 28 Ores in Southern States 28 Ores in Western States 29 Iron Mancfacture 32 Description of Blast Furnaces 32 ■Wrought Iron 36 puddlixq 31 List of RoUing MiUs in 1856 40 Mills making Railroad Iron in 1856 40 Boiler Plate and Sheet Iron Manufactories in 1856 41 Iron Wire 41 Nails 41 List of Nail Manufactories in 1856 42 Steel 43 Cast Steel 44 Table of Iron Works in operation ana aban- doned in 1856 45 Production of Pig Iron 46 Distribution of Furnaces by States 46 Product of Wrought Iron 46 Value of the Iron product in 1856 47 Copper 48 New Jersey Mines 49 Tennessee Mines 50 Lake Superior Mines 51 Product of the Pittsburgh and Boston Com- pany Mines from 1852 to 18G0 53 Minesota Company 55 Product of do from 1848 to 1860 56 Statistics of Lake Superior Mines 57 Copper Smelting 58 Useful Applications of Copper 60 Cost of Smelting Copper 60 Manufacture of Brass 62 Gold 63 Vermont Mines 64 Virginia do 64 North Carolina Mines 69 Georgia do 69 Pike's Peak do 10 California do 11 Australia do 71 Annual production of Gold in the World at the time of its discovery in California. ... 11 Length and Cost of Artifieial Water-courses in California V2 Quartz Mining 13 Table of annual productions of the Mines of California from 1848 to 1851 13 PAGE Various Mach'nes for Mining purposes ... 74 Tables sliowing the amoimtof Gold coined by the U.S. Government, and where produced 78-9 The uses of Gold 80 Lead , 81 Localilies of Mines 82 Iowa Mines 81 Table showing tlie shipments of Lead from the Upper Mississippi from 1821 to 1841. 85 Table shoft-ing the prodnction and importa- tion of Lead from 1832 to 1858 87 Lead Smelting 87 Useful Applications or Lead 91 Lead Pipe 91 Shot and Bnllets. 92 American process of making Shot, 93 ■White Lead 94 List of American White Lead Works 9ij Zinc 90 New Jersey Mines 9G Penn.sylvania do 97 Metallurgic Treat-ment and Uses 98 European Manufacture 10(1 List of the Silesian Company Works 102 Schedule of tlio cost of Zinc Ore ou ship- board at Antwerp lO:! Z;no Paint lO.T Description of Manufacture 104 Platinum 107 Iridium and Osmium 110 Mercury 110 California Mines Ill Almaden Mine in Spain Ill Total annual production of various Mines. . Ill Metallurgic Treatment lit Useful Applications of Mercury 114 Silver 115 Cobalt 1 1 G Nickel 117 Chrome or Ciiromicm. . . lis Manganese 119 Tin 119 Coal 120 Varieties of Coal 121 Relative value of different kinds of Coal. . . 124 Geological and GEOORAPniCAL Distribution OF Coal 124 Amount of Availadlb Coal 133 Extent of Coal Fields in different States 133 Relative amount of Coal Fields of Europe and America 1 34 Table showing annual amount of Lead pro- duced in Pennsylvania and Maryland from 1820tol8aO 134 pa(;h Transportation of Coal to Market 135 Table of Railroads and Canals constructed for Iransporling Coal 142 Useful Applications of Coal 146 Illuminating Gas 147 List of Gas Co.'s, with amount of Capital,4c. 148 Process of making Gas 152 Gas fob Steamboats and Railroad Caes. . . 156 Hydrocarbon or Coal Oils 156 Table of Coal Oil Works in the Uuiled States 157 History and method of manufacture 158 Petroleum or Sock Oil 163 Petroleum in the United States 164 Daily yield of seventy-four Oil Wells 165 List of Petroleum Refining works 170 Land Settlement, Internal Trade 169 Land Sales in Ohio 170 Canals in the West 172 First Locomotive built in this Country 174 Population (iI'Land States in 1830 and in 1860 175 Detroit and Chicago 177 River Cities, Atlantic Cities 180 Statistics of New Orleans 182 New York, Telegraph, Gold 185 Comparative E.xports of the Atlantic Cities 187 Harnden E xpress 188 Growth of New York 190 Bulls and Bears 195 Hotels in New York 197 BANKS IN THE UNITED STATES. Bills of Credit 198 Congress Issues, $358,465,000 199 Ten Thousand Dollars for a Cocked Hat . . . 19'9 First Bank of the United States 201 One Hundred and Twenty Banks go into ope- ration in four years 201 Tahle of relative growth of Banks 203 Table of Number of Banks, and Capital. . . 204 Bauks Located in New York 204 Alabama with Carolina, do 208 Clearing House System 209 Tabic of Capital of all Banks 209 UNITED STATES MINT. Establishment of the Mint, Standard of Coin, kc 212 Value of the Dollar and the Pound Sterling in Colonial Paper Money 213 Alloy of Gold Coin 214 United States Coinage 214 California Gold 215 Weight of Silver Coin 216 CONTENTS xni Amount of New Silver Coin 216 Deposit of Domestic Gold at United States Mint and Branches 216 Amount of Specie in 1821 217 INSURANCE. Fire, Marine, and Life 219 Number and Capital of New York Companies 222 Capital, Premiums, and Risks of the Fire Com- panies of the United States 223 Marine Insurance 224 Life Insurance 225 Comparative Rates of Domestic Life Insurance 22G IMMIGRATION. General Migration 228 Colonies of the United States 228 Early Immigration 229 Naturalization Laws 230 Number of Immigrants for the last forty years, with their Birth-places 231 Europea.v Migration — French and German. 232 Decrease in Population of Ireland 235 Allowance on Passage 236 Saving part of the Passage Money 239 Landing in New York — Future Homes 240 Table of Immigration 240 Location of Immigrants in the United States 242 Amount of Money received in the United States by Immigrants 243 Amount of Money remitted by Friends in aid of Immigration 243 Number of Natives arriving from abroad . . . 244 SOCIAL AND DOMESTIC LIFE. Introduction 245 Domestic Architecture 245 Description of Buildings 246 Houses South 247 Introduction of Anthracite Coal 248 Nott's Stoves 248 Furniture, Furnishing Goods, &c 249 China, Glass, Silver Forks, &c 251 Food, Cooking, &,c 252 Cooking Stoves 253 Dress 253 Social and Mental Culture 259 BOOKS. Book Trade, Publishing, Ac 262 First Booksellers in .\merica 263 I American Bible Society 264 j rAQS Harper and Brothers, Appletons 264 Number of Book Publishers in the United States 265 Gift-Book Sales 265 Sale of Old Books 266 Subscription Sales 267 Circulation of Popular Works 267 School Book Trade 268 Reprints and American Books 269 Book Binding 269 Books of Wood and Metal 272 Description of Binding 273 Writers op America 274 Theologians, Statesmen, Novelists, Histo- rians 274 Early Founders of the Colony Good Wri- ters 274 Works of James Madison 275 Judge Marshall, Story, Wheaton, John Quincy Adams, and others 276 Cooper, Hawthorne, Willis 279-280 Prescott and Bancroft 284 Lady Authors 285 Printing Press 286 Franklin's Press 286 Hoe and Adams Presses 297 Types 298 Machines for Casting Types 298 Stereotype, Electrotype 300 Newspapers 301 City Papers 303 Number of Papers in the United States. . . . 307 Telegraph — Origin 308 Morse, House, and Hughes Machines 311 First Lines 313 Various Lines and Companies 313 Penalty for refusing to transmit Messages. . 314 Comparison between Telegraphs and Couriers 315 THE ARTS OP DESIGN IN AMERICA. Horace Walpole 316 American Art begins with Benjamin West.. 317 Stuart, Robert Fulton 318 Sketches of the Lives of Prominent Painters 318 to 325 Sculptors 326 to 328 Engraving 332 Dr. Anderson 332 Copper-Plate Engraving 333 Americin Bank Note Company 333 Descriptions of Engraving 334 Lithography, Daguerreotype, Academies of Art, &c 335 XIV CONTENTS BDUCATION AND EDUCATIONAL INSTITU- TIONS. Development in the Colonial Period 337 Early Efforts in Virginia 337 do do in New York 338 Early Efforts in Colonies of Massachusetts and Connecticut 338 Town Action in belialf of Schools 339 Colonial Legislation and Action in the order of their settlement 341 Virginia 34 1 Massachusetts 349 Rhode Island, Connecticut 344 New Hampshire 345 New York 34G Maryland 347 New Jersey, Pennsylvania 348 Delaware, North Carolina 349 South Carolina, Georgia 350 BbsULTS AT THE CLOSE OF OUR COLONIAL HIS- TORY 350 BSVOLtTTlONART AND TRANSITION PERIOD 351 Opinions and Efforts of Noah Webster, George Washington, John Adams, Thomas Jeffer- son 352 Opinions and Efforts of James Madison, John Quincy Adams, Benjamin Rush, John Jay, De Witt Clinton, Chancellor Kent, Daniel Webster 353 Progress of Common or Elementary Schools 355 Letter from Noah Webster 355 do do Heman Humphrey 356 do do Joseph T. Buckingham 359 do do Dr. Nott 362 Recollections of Peter Parley 363 The Homespun Era of Common Schools, by Horace Bushnell. D.D 369 Letter from William Darlington, M.D,, LL.D. 370 Schools in Philadelphia 37j School Holiday in Georgia 373 Old Field School or Academy in Virginia. . . 377 Remarks 380 PAOB What is Education ? 383 Remarks on the Common School System in the United States 334 Academies, High Schools, &c 388 Letter of Josiah Quincy 389 Address of Hon. Edward Everett 391 Colleges 392 Professional, Scientific and Special Schools 393 Theological Schools 393 Law StuooLs 394 Medical Schools 394 Military and Naval Schools 395 XoRMAL Schools, &c 397 Schools of Science for Engineers, *c 400 The Lawrence School 401 Schools of Agriculture 402 Commercial Schools 403 Schools for Mechanics 403 Fine Arts — Female Education 404 School-Houses, Apparatus, and Text-Books 406 Tlie Horn-Book 413 New England Primer 414 Webster's Spelling Book 4ie Scliool Apparatus 422 LlDRARIES 423 Astor Library, Boston City Library 424 New York Mercantile Library 425 Table of Libraries in the United States 429 Lyceums, tec 432 Institutions for the Instruction of Deaf AND Dumb 434 Rev. Thomas H. Gallaudet 435 Institutions for the Blind 439 Institutions for Idiots 440 Institutions for Education of Orphans 445 Reformatory Institutions 446 PMucational Statistics of the United States. . 451 Table of American Colleges 452 do Theological Schools 454 do Law Schools, Medical Schools 455 do Deaf and Dumb In,stitutiou8 456 do Blind Institutions 457 LIST OF ILLUSTRATIONS. Page. 1, Frontispiece, 2, AmericHn Iron Works, 22 3, Smcltins Pij; Iron 22 4, Forges ;it Chalons 22 5, Flattening Machine 22 6, Chestnut Hill Mine 27 7, Viewof Baltimore, (Steel Plate) 28 8, Puddling 32 9, Casting Pig Iron 32 10, Blast Furnace 32 11, Casting Steel Ingots 32 12, Steam Hammers 40 13, Forges and Trip Hammer 40 14, Stone Hammer 51 15, Hydraulic Mining. . . 65 16, Tunneling at Table Mountain, Cal 66 17, Large Rocker 07 18, Stamps tor Crushing Gold Ores 68 19, Burke Uocker 74 20, Yosemite Valley 74 21, Father of the Forest 74 22, Gold Mining 74 23, Prop ects in California 74 24, ( Ihinese in California 74 25, Crushing Mill, or Arrastre 75 26, Scotch Hearth Furnace 88 27, Apparatus for Working Platinum 108 28, Viewof New Almaden Quicksilver Mines 113 29, Map of the Anthricite region. Pa. Mines, 126 30, Map showing Uifi'erent Strata, in Coal Ucgions. Pa 130 31, Map showing Different Strata in Coal Keirjons, Pa 132 32, Jit. Pisgah Plane. Mauch Chunk, Pa 137 33, Great Open Quany of the Lehigh 138 34, Baltimore Company's Mine, Pa 139 35, Colliery Slope 139 36, View at Mauch Chunk 139 37, Descending the Shaft 140 38, Fire Damp Explosion 140 39, Inundations 140 40, Breaking of Props 140 41 , Undermining Coal 142 42, Breaking off and Landing 142 43, Drawing out Coal 142 44, Fire in the Oil Regions, (Chrorao) 161 45, Oil Wells 168 46, Indian Encampment 170 47, Saw Mills 172 48, Niagara Falls, (Steel Plate) 175 49, The Farm 176 50, Victoria Bridge, (Steel Plate) 178 51, City Hall, New York 182 52, New York Stock Exchange 182 53, Academy of Design, New York 182 54, Cooper Institute 183 55, Gov. Stay vesant Mansion 1 84 56, First-Class Dwelling 184 57, A. T. Stewart's Residence 184 58 59 60, 61 62 63 64, 65 66 67 68, 69, 7o, 71 72 73 74 75 "6, 77, 78 79 80, 81 82 83 84, 85, 86, 87 88, 89 90, 91 92, 93 94 95 9fi 97 98 99 100 101 102 103 104 105, 106 107 108, 109 110, 111 112 113 114 115, 116, Paoh. View of Broad Street 1 85 Interior Carpet House 1 90 Interior of a Dry Goods House 200 Capitol at Washington, (Steel Plate) .... 200 U. S. Bank, Pa., (Steel Plate) 206 Senate Chamber 211 Coining Room 216 Adjusting Room 216 Kire, ( Cliromo) 218 Buildings on Fire .'. 219 Amoskeag Fire Engine 224 Hand Engine without Suction 225 Hand Engme fore and aft Brakes 225 Hand Engine Side Brakes 225 Hook and Ladder 225 Hose Carriage 225 Life Insurance Illustrated, Mr. Jones 226 Mr. Smith 226 " Mr. Clark.... 226 City Hall and Park, N. Y., (oteel Plate) 232 Irish Emigrants 240 Irishmen in Common Council, NY 240 Japanese 244 Wood's Moulding Machine 247 Old Styles Kurniture 248 New Styles of Furniture 243 Kitchen of 1770 252 " 1(<70 252 Fashion, 1776 2.i5 Evening Dress, 1780 255 Fashion, 1 780 255 1785 2.55 Evening Dress, 1795 255 1797 255 Fashion, 1800 255 1805 255 Children, 1 805 255 Fashions, 1812 255 Boys, 1812 255 Men, 1812 255 Women l'<15 256 Men, 1818 256 Women, 1820 256 Men, 1825 256 " 1828 256 Winter Dress, 1 833 256 Boys and Giris, 1 833 256 Men, 1833 256 Women, 1833 256 1840 256 Men, 1844 256 Women, 18.50 256 Fashions from 1 850 to 1 860 256 " " 1868 to 1869 256 Pleasant Home, (Steel Plate) 260 Noah Webster, (Steel Plate) 266 Laying on Gold 272 Embossing Press 272 Sawing Machine 273 LIST OF ILLUSTRATIONS. Paqe. 117, Finishing Room 273 118, Gentlemen Authors 283 119, Liulr Authors 283 120, Franklin Statue 286 121, Franklin Press 289 122, Washinfrton Press 289 123, Hand Press, Steam Inking Machine 290 124, Improved Inking Apparatus 290 125, Patent Single Cylinder Machine 291 126, Eight Cylinder Machine 292 127, Ten Cylinder Machine 293 1 28, Four Color Machine 294 1 29, Bed and Platen Power Machine 295 130, Kailroail Ticket Machine 296 131 , The Bullock Printing Press 306 132, Editorial Room 306 133, Composing Room , 306 134, Press Room 307 135, Stereotyping Room 307 136, Telegraph Apparatus. 315 137, Gentlemen in Fine Arts 322 138, Women in Fine Arts 322 139, Fishing at Newport 330 140, Country View 330 14-1, Spring." 331 142, Summer 331 143, Fall 331 1 44, First Map Engraved 332 145, Map of the Present Day 332 146, School, Interior of, in 1770 372 147, " " " 1870 372 148, Contraband Schools 380 149, P'ounding of Dartmouth College 392 1 50, School Houses as they were 406 151, " " " 406 152, " " as they are 407 1 53, Village School House 407 154, Brown School House, Hartford 407 155, View of Girard College 408 156, Packer Collegiate Institute 409 157, " " " Garden Front.. 410 1.58, " " " Interior 410 159, Nonvich Free Academy 411 160, Chicago City University 412 161, Horn Book of the 18th Century 413 162, John Hancock 414 163, Burning of John Rogers at the Stake 414 164, In Adam's Fall we sinned all 415 165, Heaven to F^ind, the Bible Mind 4i5 166, Christ Crucified, for Sinners died 415 167, The Deluge Drowned, the Earth Around, 415 168, Elijah hid, Ijy Ravens fed 415 169, The Judgment made Felix afraid 415 170, As Runs the Glass 415 171, M v Book an d I leart must never part .... 415 172, Job Feels the Rod 415 173, Proud Korah's Troop was Swallowed up, 415 174, Lot flid to Zoar 415 175, Mo.ses was he who Israel's host led through the Sea 415 176, Noah did view the Old World and New, 415 177, Young Obadias, David, Josias 415 178, Peter denied his Lord and cried 415 179, Queen Esther sues 415 180, Young Pious Ruth left all for Truth 415 181, Young Samuel dear, the Lord did fear. . . 415 182, Young Timothy learnt Sin to fly 415 183, Vasthi for Pride was set iiside 415 184, Whales in the Sea 415 185, Xerxes did die 415 186, While Youth doth cheer, &c 415 Page. 187, Zacheus he did climb the Tree 415 188, The Boy that Stole Apples 416 189, Country Maid 417 190, Cat and Rat 417 191, Fox and Swallow 418 192, Fox and Bramble 418 193, The Partial Judge 418 294, Bear .and Two Friends 419 195, Two Dogs 419 196, Eye, Nose, &c 420 197, Arm, Hand, &c 420 198, Eagle's Nest 420 199, Vertebriiles 420 200, Articulates 420 201, Mollusks 420 202, Radiates 420 203, Animals of the Seal Kind 420 204, Birds 421 205, Flowers 421 206, Geological Chart 421 207, School Apparatus as it was 422 208, School Apparatus as it is 422 209, Desk and Settee Combined 422 210, Platform Desk 422 211, Assistant Teacher's Desk 422 212, Tinsby 's Globe Time Piece 422 213, NnmeVal Frame 423 2 1 4, Eureka Wall Slate 423 215, School Globe 423 216, Black Board Support 423 217, Crayon Holder 423 218, Assembly School Desks and Settees 423 219, Boston City Library, pjxterior 425 220, " " Interior 426 221, Alphabet, Deaf and Dumb, A 436 222, " " " B 436 223, " " " C 436 224, " " " D 436 225, " " " E 436 226, " " " F 436 227, " " " G 436 228, " " " H 436 229, " " " 1 436 230, " " " J 436 231, " " " K 4.!6 232, " " " L 436 2.33, " " " M 436 234, " " " N 436 235, " " " 436 236, " " " P 436 236, " " " Q 436 237, " • " " R 436 238, " " " S 436 239, " " " T 436 240, " " " U 436 241, " " " V 436 242, " " " W 436 243, " •' '■ X 436 244, " " " Y 436 245, " " " Z 436 246, " " " & 436 247, American Asylum for Deaf and Dumb.. . 437 248, Pennsylvania Asylum for Blind 440 249, Asylum for Idiots, Syracuse, N. Y 444 250, Camp Meeting 251, Baptism by Immersion, (Steel Plate).. .. 252, Baptism by Sprinkling. " " .... 253, South Church, New Britain, Ct 2.i4, First Church built in Connecticut 255, Ancient Dutch Church in Albany 257, Ancient Swedish Church in Philadelphia, imiNG INDUSTRY OF THE UNITED STATES. INTRODUCTORY REMARKS. The mineral wealth of the American colonies does not appear to have been an object of much interest to the early settlers. Congregated near the coast, the}' were little likely to become acquainted with many of the mineral localities, most of which are in the interior, in regions long occupied by the Indian tribes. The settlers, moreover, prob- ably possessed little knowledge of mining, and certainly lacked capital which they could appropriate in this direction. Some discov- eries, however, were made by them very soon after their settlement, the earliest of which were on the James river, in Virginia. Beverlj', in his " History of the Present State of Virginia," published in London in 1705, makes mention of iron works which were commenced on Falling Creek, and of glass-houses which were about to be con- structed at Jamestown just previous to the great massacre by the Indians, in 1622. This undertaking at Falling Creek is referred to by other historians, as by Stith, in his "History of Virginia" (1753), p. 279. A Captain Nathaniel Butler, it appears, present- ed to the king, in 1G23, a very disparaging account of the condition of the colony, men- tioning, among other matters, that " tlie Iron Works were utterly wasted, and the People dead ; the Glass Furnaces at a stand, and in small Hopes of proceeding." The commit- tee of the company, in their reply to this, affirm that " great Sums had been expended, and infinite Care and Diligence bestowed by the Officers and Company for setting forward various Commodities and Manufactures ; as Iron Works," etc., etc. Salmon, in his "Modern History" (1740), vol. iii, pp. 439 and 468, refers to the statement of Bever- ly, mentioning that "an iron work was set up on Falling Creek, in James River, where they found the iron ore good, and had near brought that work to perfection. The iron proved reasonably good ; but before they got into the body of the mine, the people were Vol. II. 2 cut oflF in that fatal massacre (of March, 1622), and the project has never been set on foot since, until of late ; but it has not had its full trial." This author also refers to the representations of the Board of Trade to the House of Commons, in 1732, as contain- ing notices of the iron works in operation in New England. From various reports of the governor of Massachusetts Bay and other officials of this colon}', there appear to have been, in 1731, as many as six furnaces and nineteen forges for making iron in New Eng- land, as also a slitting mill and nail factory- connected with it. The first blast furnace in the colonies ap- pears to have been built in 1702, by Lambert Despard, at the outlet of Mattakecset pond, in Plymouth County, Massachusetts, and a number more were afterward set in operation to work the bog ores of that district. Their operations are described in the " Collections of the Massachusetts Historical Society" for 1804, by James Thacher, M. D., who was himself engaged in the manufacture. In Rhode Island and Providence Plantations, the same kinds of ore were found and work- ed at about the same period. Alexander gives the year 1715 as the epoch of blast furnaces in Maryland, Virginia, and Pennsyl- vania. These enterprises were regarded with great disfavor in the mother country. In 1719 an act was brought forward in the House of Lords, forbidding the erection of rolling or slitting mills in the American col- onies, and in 1750 this was made a law. In Connecticut, Governor Winthrop was much interested in investigating the charac- ter of the minerals about Haddam and Mid- dletown. In 1651 he obtained a license giv- ing him almost unlimited privileges for working any mines of "lead, copper, or tin, or any minerals ; as antimony, vitriol, black lead, alum, salt, salt springs, or any other the like, * * * to enjoy forever said mines, with the lands, woods, timber, and water within two or three miles of said mines." And in 1661, another special grant 18 MINING INDISTRY OF THE UMTED STATES. ■was made to him of any mines he might discover in the neighborhood of Middletown. It does not appear, however, that he derived any special advantage from these privileges, although he used to make frequent excur- sions to the different localities of minerals, especially to the Governor's Ring, a moun- tain in the north-west corner of East Had- dam, and spend three weeks at a time there with his servant, engaged, as told by Gover- nor Trumbull to President Styles, and record- ed in his diary, in " roasting ores, assaying metals, and casting gold rings." John Win- throp, F.R.S., iirandson of Governor Win- throp, was evidently well acquainted with many localities of different ores in Connecti- cut, and sent to the Royal Society a consid- erable collection of specimens he had made. It is supposed that among them Ilatchett found the mineral colunibite, and detected the new metal which he natned cohimbium. At Middletown, an argentiferous lead mine was worked, it is supposed, at this period, by the Winthrops, and the men employed were evidently skilful miners. When the mine was reopened in 1852, shafts were found well timbered and in good preservation, that had been sunk to the depth of 120 feet, and, with the other workings, amounted in all to 1,500 feet of excavation. The oldest Ameri- can charter for a mining company was grant- ed in 1709, for working the copper ores at Simsbury, Connecticut. Operations were carried on here for a number of years, the ore raised being shipped to England, and a similar mining enterprise was undertaken in 1719, at Belleville, in New Jersey, about six miles from Jersey City. The products of the so-called Schuyler mine at this place amounted, before the year 1731, to 1,386 tons of ore, all of which were shipped to England. At this period (1732) the Gap mine, in Lancaster county, Pennsylvania, was first opened and worked for copper, and about the middle of the century various other copper mines were opened in New Jersey ; also, the lead mine at Southamp- ton, Mass., and the cobalt mine at Chatham, Conn. In 1754 a lead mine was success- fully worked in Wythe county, in south- western Virginia, and this is still productive. It is probable that, by reason of the higher value of copper at that period, and the lower price paid for labor than at present, some of the copper mines may have proved profit- able to work, though it is certain this has not been the case with them of late years. The existence of copper in the region about Lake Superior was known, from the reports of the Jesuit missionaries, in 16G0, and one or two unsuccessful attempts were made to work it during the last century by parties of Englishmen. The lead mines of the upper Mississippi, discovered by Le Sueur in his ex- ploring voyage up the river in 1700 and 1701, were first worked by Dubuque, a French miner, in 1788, upon the tract of land now occupied by the city in Iowa bear- ing his name. Such, in general, was the extent to which this branch of industry had been carried up to the close of the last century. The only coal mines worked were some on the James river, twelve miles above Richmond, and the capacit}' of these for adding to the wealth of the country was not by any means appre- ciated. The gold mines were entirely un- known, and the dependence of the country upon Great Britain for the supply of iron bad so checked the development of this branch of manufacture, that comparatively nothing was known of our own resources in the mines of this metal. The most impor- tant establishments for its manufacture were small blast furnaces, working bog ores, and the bloomaries of New York and New Jer- sey, making bar iron direct from the rich magnetic ores. The progress of the United States in these branches will be traced in the succeeding chapters, one of which will be devoted to each of the principal metals. CHAPTER I. IRON. The early history of the iron manufacture in the American colonies has been noticed in the introductory remarks which precede this chapter. Since the year 1750 the re- strictions imposed upon the business by the mother country had limited tlie operations to the production of pig iron and castings, and a few blast furnaces were employed in New England and the middle Atlantic states. A '^ considerable portion of the pig iron was ex- ; ported to Great Britain, where it was admit- ted free of duty, and articles of wrought ; iron and steel were returned from that coun- ! try. In 1771 the shipment of pig iron from the colonies amounted to 7,525 tons. By the sudden cessation of eommercial relations 19 on the breaking out of the war, the country was thrown upon its own resources, but was illy prepared to meet the now and extraor- dinary demands for iron. The skill, experi- ence, and capital for this business were all alike wanting, and even the casting of can- non was an undertaking that few of the fur- nace masters were prepared to venture upon. The bog ores found in Plymouth county, Mass., together with supplies from New Jer- sey, sustained ten furnaces ; and in Bridge- water, cannon were successfully cast and bored by lion. Hugh Orr, for the supply of the army. They were also made at Westville, Conn., by Mr. Elijah Bachus, who welded together bars of iron for the purpose. The Continental Congress, also, was forced to establish and carry on works for furnishing iron and steel, and in the northern part of New Jersey, the highlands of New York, and the valley of the Housatonic in Connecticut, they found abundance of rich ores, and forests of the best wood for the charcoal required in the manufacture. At their armory at Car- lisle, Pa., the first trials of anthracite for manu- facturing purposes were made in 1775. But the condition of the country was little favor- able for the development of this branch of industry, and after the war, without capital, a currency, or facilities of transportation, the iron business long continued of little more than local importance. The chief supplies were again furnished from the iron works of Great Britain, the establishment of which had in great part been owing to the restric- tions placed upon the development of our own resources; and while that country con- tinued to protect their own interest by pro- hibitor}' duties that for a long period exclu- ded all foreign competition, the iron inter- est of the United States languished under a policy that fostered rather the carrying trade between the two countries than the building up of highly important manufactories, and the establishment around them of perma- nent agricultural settlements through the home market they should secure. Hence it was that the manufacture in Great Britain was rapidly accelerated, improved by new inventions, strengthened by accumulated capital, and sustained by the use of mineral coal for fuel, almost a century before we had learned in the discouraging condition of the art, that this cheap fuel, mines of which were worked near Richmond in Virginia, before 1790, could be advantageously em- ployed in the manufacture. The natural ad- vantages possessed by Great Britain power- fully co-operated with her wise legislation ; and as her rich deposits of iron ore and coal were developed in close juxtaposition, and in localities not far removed from the coast, the iron interest became so firmly established that no nation accessible to her ships could successfully engage in the same pursuit, until, by following the example set by Great Britain, its own mines and resources might be in like manner developed. Thus encouraged and supported, the iron interest of Great Britain has prospered at the expense of that of all other nations, till her annual production amounts to more than one-half of the seven millions or eight millions of tons produced throughout the world ; and the products of her mines and furnaces have, until quite re- cently, been better known, even in the ex- treme western states, where the cost of " Scotch pig iron " has been more than doubled by the transportation, than has that of the rich ores of these very states. And thus it ij the annual production of the Uni- ted States has only recently readied 2,000,- 000 tons, notwithstanding the abundance and richness of her mines, both of iron ores and of coal, and the immense demands of iron for her own consumption. So great are the advantages she possesses in the quality of these essential materials in the production of iron, that according to the statement of an able writer upon this subject, who is him- self largely engaged in the manufacture, less than half the quantity of raw materials is required in this country to the ton of iron, that is required in Great Britain, " thus economizing labor to an enormous extent. In point of fact, the materials for making a ton of iron can be laid down in the United States at the furnace with less expenditure of human labor than in any part of the known world, with the possible exception of Scotland." (''On the Statistics and Geog- raphy of the Production of Iron," by Abram S. Hewitt, N. Y., 1856, p. 20). The tables presented by this writer, of the annual pro- duction, show striking vicissitudes in the trade, which is to be accounted for chiefly by the fluctuations in prices in the English m.arket depressing or encouraging our own manufacture, and by the frequent changes in our tariff. "In 1810 the production of iron, en- tirely charcoal, was 54,000 tons. In 1820, in consequence of the commercial ruin which swept over the country just before, the busi' 20 MINING INDUSTRY OP THE UNITED STATES. ness was in a state of comparative ruin, and not over 20,000 tons were produced. In 1828 the product was 130,000 tons. " 1829 " " " 142,000 " " 1830 " '• " 165,000 " " 1831 " " " 191,000 " " 1832 " " " 200,000 " " 1840 " " " 347,000 " " 1842 " " " 2ir),000 " " \?43 " " " 486,000 " " I84G " " " 705,000 " " 1847 " " " 800,000 " " 1852 " " " 5G4,000 " " 1854 " " " 7IG,C74 " " 1855 " " " 754,178 " '■ 185G " " " 874,423 " " 1857 " " " 798,157 " " 1858 " " " 705,094 " " 1859 " " " 8<40,427 " " 18C0 " " " 913,774 " " 18G1 " " " 731,564 " " 18G2 " " " 787,662 " " 18C3 " " " 947,604 " " 1864 " " "1,135,497 " " 1805 " " " 931,532 " " IS;;G " " "1,350,943 " " 18fi7 " " "1,461,626 " " 1808 " " "1,103,500 " " 1SG9 ■' " "1,910,641 " " 1870 " " " 2.000.000 " There was a protective duty on iron from 1P2J to 1837, but none from 1837 to I8J3. From 18-13 to 1848 there was protection, but none from 1848 to 1803. The high prot'Ctive duty was modified in 18G(), and since that time the proteciion has been more and more inoderiite as the |)reniium on gold declined. The laritF of 1870 reduced the duty from nine to seven dollars per ton on pig iron, and from eight to six dollars per ton on scrap iron. Until the year 1840, charcoal had been the only fuel used in the maiuifacture of iron ; and wliilo it produced a metal far superior in quality to that made with coke, the great demands of the trade were for cheap irons, and the market was chiefly supplied with these from Great Britain. The introduction of anthracite for smelting iron ores in 1840 marked a new era in the manufacture, though its influence was not sensibly felt for several years* MATERIALS EMPLOYED IN THE MANUFACTURE. Before attempting to exliibit the resources of the United States for making iron, and the methods of conducting the manufacture, it is well to give some account of the mate- rials employed, and explain the conditions upon which this manufacture depends. Three elements are essential in the great brancli of the business — that of producing pig iron, viz : ores, fuel to reduce tlicm, and a suit- able flux to aid the process by melting with and removing tlic eartliy impurities of the ore in a freely flowing, glassy cinder. The flux is usually limestone, and by a wise pro- vision, evidently in view of the uses to wliich this would be applied, limestone is almost universally found conveniently near to iron ores ; so also are stores of fuel com- mensurate witli tlie abundance of the ores. The principal ores are hematites, magnetic and specular ores, the red oxides of the sec- ondary rocks, and tlic carbonates. Probably more than three-quarters of the iron made in the United States is from the first three varieties named, and a much larger propor- tion of tlie English iron is from the last — from tlie magnetic and specular ores none. Hematites, wherever known, are favorite ores. They are met with in great irregular-sliaped deposits (apparently derived from other forms in which the iron was distributed), in- termixed with ochres, clays, and sands, some- times in scattered lumps and blocks, and sometimes in massive ledges ; they also occur in beds inter.stiatificd among the mica slates. Although the deposits arc regarded as of limited capacity, they are often worked to the depth of more than 100 feet; in one instance in Berks county, Penn., to 105 feet; and when abandoned, as they sometimes are, it is questionable whctlier this is not ratlier owing to the increased expenses incurred in continuing tlie enormous excavations at such depths, than from failure of the ore. Mines of hematite have proved the most valuable mines in the United States. At Salisbury, in Connecticut, they have been worked almost uninterruptedly for more than 100 years, supplying the means for supporting an active industry in the country around, and enriching generation after generation of proprietors. The great group of mines at Chestnut Hill, in Columbia county, Penn., and others in Berks and Lehigh counties in the same state, are of similar character. The ore is a hydrated peroxide of iron, consisting of from 1'2 to 85 percent, of per- oxide of iron (which corresponds to about 50 to GO per cent, of iron), and from 10 to 14 per cent, of water. Silica and alumina, phosphoric acid, and peroxide of manganese are one or more present in very small quanti- ties ; but the impurities are rarely such as to interfere witli the production of very excel- lent iron, either for foundry or forge pur- poses — that is, for castings or bar iron. It is 21 easily and cheaply mined, and works easily in the blast furnace. On account of its de- ficiency in silica it is necessary to use a lime- stone containing this ingredient, that the elements of a glassy cinder may be provided, whicli is the first requisite in smelting iron ; or the same end may be more advantageously attained by adding a portion of magnetic ore, which is almost always mixed with silica in the form of quartz ; and these two ores are consequently very generally worked together — the hematites making two-thirds or three-quarters of the charge, and the mag- netic ores the remainder. Magnetic ore is the richest possible com- bination of iron, the proportion of which cannot exceed '72.4 per cent., combined with 37.6 per cent of oxygen. It is a heavy, black ore, compact or in coarse crystalline grains, and commonly mixed with quartz and other minerals. It atfects the magnetic needle, and pieces of it often support small bits of iron, as nails. Such ore is the load- stone. It is obtained of various qualities ; some sorts work with great difficulty in the blast furnace, and others are more easily managed and make excellent iron for any use ; but all do better mixed with hematite. The magnetic ores have been largely em- ployed in the ancient processes of making malleable iron direct from the ore in the open forge, the Catalan forge, etc., and at the present time they are so used in the bloomary fires. They are found in inex- haustible beds of all dimensions lying among the micaceous slates and gneiss rocks. These beds are sometimes so extensive that they appear to make up the greater part of the mountains in which they lie, and in common language the mountains are said to be all ore. Specular ore, or specular iron, is so named from the shining, mirror-like plates in which it is often found. The common ore is some- times red, steel gray, or iron black, and all these varieties are distinguished by the bright red color of the powder of the ore, which is that of peroxide of iron. Mag- netic ore gives a black powder, which is that of a less oxidized combination. The specu- lar ore thus contains less iron and more oxy- gen than the magnetic ; the proportions of its ingredients are 70 parts in 100 of iron, and 30 of oxygen. Though the difference seems slight, the qualities of the two ores are quite distinct. The peroxide makes iron fast, but some sorts of it produce an inferior quality of iron to that from the hematite and mag- netic ores, and better adapted for castings than for converting into malleable iron. The pure, rich ores, however, are many of them unsurpassed. It is found in beds of all di- mensions, and though in the eastern part of the United States they prove of limited ex- tent, those of Missouri and Lake Superior are inexhaustible. Magnetic and ."ipccular ores arc associated together in the same dis- trict, and sometimes are accompanied by hematite beds ; and it is also the case, that iron districts arc characterized by the preva- lence of one kind only of these ores, to the exclusion of the others. The red oxides of the secondary rocks consist, for the most part, of the red fossil- iferous and oolitic ores that accompany the so-called Clinton group of calcareous shales, sandstones, and argillaceous limestones of the upper silurian along their lines of outn crop in Pennsylvania, Maryland, and east- ern Tennessee, and from Oneida county, N. Y., westward past Niagara Falls, and through Canada even, to Wisconsin. The ore is found in one or two bands, rarely more than one or two feet thick, and the sandstone strata with which they are associated are sometimes so ferruginous as to be themselves workable ores. The true ores arc sometimes entirely made up of the forms of fossil marine shells, the original material of which has been gradually replaced by peroxide of iron. The oolitic variety is composed of fine globular particles, united together like the roe of a fish. The ore is also found in compact forms, and in Wisconsin it is in the condi- tion of fine sand or seed. Its composition is very variable, and its per-centagc of iron ranges from 40 to 60. By reason of the carbonate of lime dift'used through some of the varieties, these work in the blast furnace very freely, and serve extremely well to mix with the silicious ores. Of the varieties of carbonate of iron, the only ones of practical importance in the United States are the silicious and argilla- ceous carbonates of the coal formation, and the similar ores of purer character found among the tertiary clays on the western shores of Chesapeake Bay. The former va- rieties are the chief dependence of the iron furnaces of Great Britain, where they abun- dantly occur in layers among the shales of the coal formation, interstratified with the beds of coal — the shafts that are sunk for the exploration of one also penetrating beds 22 MINING INDUSTRY OF THE UNITED 6TATKB. of the Other. The la3'ers of ore are in flat- tetieil blocks, balls, and kidney-shaped lumps, which are picked out from the shales as the beds of these are excavated. The ore is lean, affording from 30 to 40 per cent, of iron ; but it is of easy reduction, and makes, when properly treated, iron of fair quality. In Pennsylvania, Ohio, western Virginia, Kentucky, and Tennessee, the ores occur witli the same associations as in England ; but the supply is, for the most part, very pre- carious, and many furnaces that have de- pended upon them arc now kept in opera- tion only by drawing a considerable portion of their supplies from the mines of Lake Superior, more than one thousand miles off. Among the horizontally stratified rocks west of the Allcghanies, the same bauds of ore are traced over extensive districts, and arc even recognized in several of the dift'erent states named. One of the most important of these baiuls is the buhrstonc ore, so call- ed from a cellular, flinty accompaniment which usually underlies it, the whole con- tained in a bed of peculiar fossiliferous lime- stone. So much carbonate of lime is some- times present in the ore, that it requires no other flux in the blast furnace. Its pcr-cent- agc of iron is from 25 to 35. Along the line of outcrop of some of the carbonates are found deposits of hematite ores, the result of superficial changes in the former, due to atmospheric agencies long continued. In southern Ohio, at Hanging Rock particularly, numerous furnaces liave been supported by these ores, and have furnislied much of the best iron produced at the west. The carbonates of the tertiary are found in blocks and lumps among the clays along the shores of the ( hesapeake at Baltimore, and its vicinity. The ores are of excellent character, work easily in the furnace, make a kind of iron highly esteemed — particularly for the manufacture of nails— and are so abundant that they have long sustained a considerable number of furnaces. They lie near the surface, and are collected by exca- vating the clay beds and sorting out the balls of ore. The excavations have been carried out in some places on the shore be- low the level of tide, the water being kept back by coffer dams and steam pumps. Bog ores, with which the earliest furnaces in the country were supplied, are now little used. They are rarely found in quantities sufiicient for running the large furnaces of the present day, and, moreover, make but an inferior, brittle quality of cast iron. They arc cliieiiy found near the coast, and being easily dug, and also reduced to metal with great facility, they proved very convenient for temporary use before the great bodies of ore in the interior were reached. Some fur- naces are still running on these ores in the south-west part of New Jersey, and at Snow- hill, on the eastern shore of Maryland, and the iron they make is used to advantage in mixing at the great stove foundries in Albany and Troy with otlier varieties of cast iron. It increases the fluidity of these, and pro- duces with them a mixture that will flow into and take the forms of the minutest markings of the mould. Charcoal has been the only fuel employed in the manufacture of iron until anthracite was applied to this purpose, about the year 1840, and .still later — in the United States — coke and bituminous coal. So long as wood continued abundant in the iron districts, it was preferred to the mineral fuel, as in the early experience of the use of the latter the quality of the iron it produced was inferior to that made from the same ores with char- coal, and even at the present time, most of the highest-priced irons are made with char- coal. The hard woods make the best coal, and after these, the yellow pine. Hemlock and chestnut are largely used, because of their abundance and cheapness. The char- coal furnaces are of small size compared with those using the denser mineral coal, and their capacity rarely exceeds a produc- tion of ten or twelve tons of pig iron in twenty-four hours. In 1840 they seldom made more than four tons a day ; the differ- ence is owing to larger furnaces, the use of hot blast, and much more efficient blowing machinery. The consumption of charcoal to the ton of iron is one hundred bushels of hard-wood coal at a minimum, and from this running up to one hundred and fifty bushels or more, according to the quality of the coal and the skill of the manager. The economy of the business depends, in great part, upoi. the convenience of the supplies of fuel and of ores, of each of which rather more than two tons weight are consumed to every ton of pig iron. As the woods are cut oft' in the vicinity of the furnaces, the supplies are gradually drawn from greater distances, till at last they are sometimes hauled irofi. ten to fourteen miles. The furnaces near Balti- more have been supplied with pine wood dis- charged from vessels at the coaling iiilns IRON. 23 close by the furnaces. Transportation of the fuel in sucli cases is a matter of second- ary importance. The mineral coals are a more certain de- pendence in this manufacture, and arc cheap- ly conveyed from the mines on the great lines of transportation, so that furnaces may be placed anywhere upon these lines, with reference more especially to proximity of ores. Thus they can be grouped togeth- er in greater numbers than is practicable ■with charcoal furnaces. Their establishment, however, involves the outlay of much capital, for the anthracite furnaces are all built upon a large scale, with a capacity of producing from twenty to thirty tons of pig iron a day. This requires machinery of great power to furnish the immense quantities of air, amounting in the large stacks to fifteen tons or more every hour, and propel it through the dense column, of fifty to sixty feet in height, of heavy materials thatfiU the furnace. The air actually exceeds in weight all the other materials introduced into the furnace, and its efficiency in promoting combustion and generating intensity of heat is greatly increased by the concentration to which it is subjected when blown in under a pressure of six or eight pounds to the square inch. It is rendered still more efficient by being heated to temperature sufiicient to melt lead before it is introduced into the furnace; and this demands the construction of heating ovens, through which the blast is forced from the blowing cylinders in a series of iron pipes, arranged so as to absorb as much as possible of the waste heat from the combust- ible gases that issue from the top of the stack, and are led through these ovens before they are finally allowed to escape. The ■weight of anthracite consumed is not fiir from double that of the iron made, and the ores usually exceed in weight the fuel. The flux is a small .and cheap item, its weight ranging from one-eighth to one-third that of the ores. The location of furnaces with reference to the market for the iron is a consideration of no small importance, for the advantages of cheap material may be overbalanced by the difference of a few dollars in the cost of placing in market a product of so little value to the Ion weight as pig iron. The following statement gave the cost of the different items which went to make up the total e.xpense of production at the locali- ties named in 1859. The advance in the 2* value of ores, cost of transportation, labor, and coal, have increased these items about 75 per cent, since 1863. At different points on the Hudson river, anthracite furnaces are in operation, which are supplied with hematites from Columbia and Dutchess counties, N. Y., and from the neighboring counties in Massachusetts, at prices varying from $2.25 to 83.00 per ton; averaging about $2.50. They also use mag- netic ores from Lake Champlain, and some from the Highlands below West Point, the latter costing S2.50, and the former §3.50 to, $4.50 per ton ; the average being about $!3.50. The quantities of these ores pur- chased for the ton of iron produced are about two tons of hematite and one of mag- netic ore, making the cost for the ores $6.75. Two tons of anthracite cost usually $9, and the flux for fuel about 35 cents. Actual con- tract prices for labor and superintendence have been 14 per ton. Thus the total ex- pense for the ton of pig iron is about |i:i0.10 ; or, allowing for repairs and interest on capital, full $21. In the Lehigh valley, in Pennsylvania, are numerous furnaces, which are supplied with anthracite at the low rate of $3 per ton, or $6 to the ton of iron. The ores are mixed magnetic and hematites, averaging in the proportions used about $3 per ton, or, at the rate consumed of 2i tons, $7.50 to the ton of iron. Allowing the same amount — $4.35 — for other items, as at the Hudson river furnaces, the total cost is $17.85; or, with interest and repairs, nearly $19 per ton. The difference is in great part made up to the furnaces on the Hudson by their convenience to the great markets of New York, Troy, and Albany. The charcoal iron made near Baltimore shows a higher cost of production than either of the above, and it is also subject to greater expenses of transportation to market, which is chiefly at the rolling mills and nail fac- tories of Massachusetts. Its superior quality causes a demand for the product and sustains the business. For this iron per ton 24 tons of ore are consumed, costing $3,624 per ton, or $9.06 ; fuel, 34 cords at $2.50, $8.75; flux, oyster shells, 30 cts. ; labor (in- cluding $1.50 for charring) $2.75 ; other e.x- penses, $2 ; total, $22.86. At many localities in the interior of Pennsylvania and Ohio, iron is made at less cost, but their advantages are often counter- balanced by additional expenses incurred in 24 MINING INDUSTKir OF THE UNITED STATES. delivering the metal, and obtaining the pro- ceeds of its sale. Increased facilities of transportation, however, are rapidly remov- ing these distinctions. At Danville, on the Susquehanna river, Columbia county, Penn- sylvania, the cost of production has been re- duced to an unusually low amount, by reason of large supplies of ore close at hand, the cheapness of anthracite, and the very large scale of the operations. Pig iron, as shown by the books of the compan}', has been made for $11 per ton. Its quality, however, was inferior, so that, with the expenses of trans- portation added, it could not be placed in the eastern markets to compete with other irons. Pig iron is produced more cheaply on the Ohio river and some of its tributaries than elsewhere, but there are no furnaces in the United States which can make a good article much less than S27 per ton. DISTEIBUTION OF THE ORES. The magnetic and specular ores of the United States are found in the belt of metamorphic rocks — the gneiss, quartz rock, mica and talcose slates,and limestones — which ranges along to the east of the AUeghanies, and spreads over the principal part of the New England states. It is only, however, in certain districts, that this belt is produc- tive in iron ores. The hematites belong to the same group, and the important districts of the three ores may be noticed in the or- der in which they are met from Canada to Alabama. Similar ores are also alnindant in Missouri, and to the south of Lake Superior. New England States. — In New Ilamp- sliire magnetic and specular ores are found in largo quantities in a high granitic hill called the Baldface Mountain, in the town of Bartlctt. The locality is not conveniently accessible, and its remoteness from coal mines will probably long keep the ore, rich and abundant as it is, of no practical value. At Piermont, on the western border of the state, specular ore, very rich and pure, is also abundant, but not worked. At Fran- conia a sni.all furnace, erected in 1811, was run many years upon magnetic ores, obtain- ed from a bed of moderate size, and which in 1824 had been worked to tlie depth of 200 feet. In 1830 the iron estaljlisliments of this place were still objects of considerable interest, though from the accounts of them published in the American Journal of Science of that year, it appears that the annual pro- duction of the blast furnace for the preceding nine years had averaged only about "216 tons of cast iron in hollow ware, stoves, machinerv, and pig iron" — a less quantity than is now produced in a week by some of the anthracite furnaces. One forge making bar iron direct from the ore produced forty tons annually, and another lUO tons, con- suming 550 bushels of charcoal to the ton. The cost of this, fortunately, was only from $3.75 to S4.00 per hundred bushels. A portion of the product was transported to Boston, the freight alone costing $25 per ton. In Vermont these ores are found in the metamorphic slates of the Green Mountains, and are worked to some extent for mixing with the hematite ores, which are more abundant, being found in many of the towns through the central portion of the state, from Canada to Massachusetts. In 1850 the number of blast furnaces was ten, but their production probably did not reach 4,000 tons per annum, and has since dwindled away to a much less amount. At the same time there were seven furnaces in Berkshire, Mass., near the hematite beds that are found in the towns along the western line of the state. These had a working capacity of about 12,000 tons of pig iron annually, and this being made from excellent ores, with charcoal for fuel, its reputation was high and the prices remunerative; but as charcoal in- creased in price, and the cheaper anthracite- made iron improved in quality, the business became unprofitable ; so that the extensive hematite beds are now chiefly valuable for furnishing ores to the furnaces upon the Hudson river, where anthracite is deliv- ered from the boats that have come through the Delaware and Hudson canal, and magnetic ores are brought by similar cheap conveyance from the mines on the west side of Lake Champlain. Through Connecticut, down the Ilousatonic valley, very extensive beds of hematite have supplied the sixteen furnaces which were in operation ten years ago. The great Salisbury bed has already been named. In the first half of the present century it produced from 250,000 to 300,000 tcms of the very best ore ; the iron from which, when made with cold blast, readily brought from $6 to $10 per ton more than the ordi- nary kinds of pig iron. The Kent ore bed was of similar character, though not so extensive. New York. — Across the New York state line, a number of other very extensive de- posits of hematite supported seven blast fur- IRON. . 25 naces in Columbia and Dntcliess counties, and now furnish supplies to those along the Hudson river. In Putnam count}-, magnetic ores succeed the hematites, and are devel- oped in considerable beds in Putnam Val- ley, east from Cold Spring, where they were worked for the supply of forges during the last centur}'. These beds can again furnish large quantities of rich ore. On the other side of the river, very productive mines of magnetic ore have been worked near Fort Montgomery, six miles west fi'om the river. At the Greenwood furnace, back from West Point, was produced the strongest cast iron ever tested, which, according to the report of the officers of the ordnance department, made to Congress in 1856, after being re- melted several times to increase its densitv, exhibited a tenacity of 45,9('0 lbs. to the square inch. The beds at Monroe, near the New Jersey line, are of vast extent; but a small portion of the enormous quantities of ore in sight, however, makes the best iron. Mining was commenced here in 1750, and a furnace was built in 1751, but operations have never been carried on upon a scale commensurate with the abundance of the ores. In the northern counties of New York, near Lake Charaplain, are numerous mines of rich magnetic ores. Some of the most extensive bloomary establishments in the United States are suppoi-ted by them in Clinton county, and many smaller forges are scattered along the course of the Ausable river, where water power near some of the ore beds presents a favorable site. Bar iron is made at these establishments direct from the ores; and at Keeseville nail factories are in operation, converting a portion of the iron into nails. In Essex county there are also many very productive mines of the same kind of ore, and Port Henry and its vicinitv has furnished large quantities, not only to the blast furnaces that were formerly in operation here, but to those on the Hudson, and to puddling furnaces in different parts of the country, particularly about Boston. In the interior of Essex county, fort}- miles back from the lake, are the extensive mines of the Adirondac. The ores are rich as well as inexhaustible, but the remoteness of the locality, and the difficulty attending the working of them, owing to their contamina- tion with titanium, detract greatly from their importance. On the other side nf the Adi- rondac mountains, in St. Lawrence county, near Lake Ontario, are found larjie beds of specular ores, which have been worked to some extent in several blast furnaces. They occur along the line of junction of the gran- ite and the Potsdam sandstone. The iron they make is inferior — suitable only for cast- ings. The only other ores of any importance in the state are the fossiliferous ores of the Clinton group, which are worked near Oneida Lake, and at several points along a narrow belt of country near the south shore of Lake Ontario. They have sustained five blast furnaces in this region, and are transported in large quantities by canal to the anthra- cite furnaces at Scranton, in Pennsylvania, the boats returning with mineral coal for the furnaces near Oneida Lake. New Jersey. — From Orange county, in New York, the range of gneiss and horn- blende rocks, which contain the magnetic and specular ores, passes into New Jersey, and spreads over a large part of Passaic and Morris, and the eastern parts of Sussex and Warren counties. The beds of magnetic ore are very large and numerous, and have been worked to great extent, especially about Ringwood, Dover, Rockaway, Boonton, and other towns, both in blast furnaces and in bloomaries. At Andover, in Sussex county, a great body of specular ores furnished for a number of years the chief supjjlies for the furnaces of the Trenton Iron Company, situ- ated at Philipsburg, opposite the mouth of the Lehigh. On the range of this ore, a few miles to the north-east, are extensive deposits of Frankliniteiron ore accompanying the zinc ore of this region. This unusual variety of ore consists of peroxide of iron about 66 per cent., oxide of zinc 17, and oxide of manganese 16. It is smelted at the works of the New Jersey Zinc Company at New- ark, producing annually about 2,000 tons of pig iron. The metal is remarkable for its large crystalline faces and hardness, and is particularly adapted for the manufacture of steel, as well as for producing bar iron of great strength. As the forests, which formerly supplied abundant fuel for the iron works of this re- gion, disappeared before the increasing de- mands, attention was directed to the inex- haustible sources of anthracite up the Lehigh valley in Pennsylvania, with which this iron region was connected by the Morris canal and the Lehigh canal ; and almost the first successful application of this fuel to the smelting of iron ores upon a large scale was made at Stanhope, by Mr. Edwin Post. A new 26 MINING INDUSTRY OF THE UNITED STATES. era in tie iron manufacture was thus intro- duced, and an immense increase in the pro- duction soon followed, as the charcoal fur- naces gave place to larger ones constructed for antliracite. The Lehigh valle_v, lying on the range of the iron ores toward the soutli- wcst, also produced large quantities of ore, which, however, was almost exclusively hematite. Hence, an interchange of ores has been largely carried on for furnishing the best mixtures to the furnaces of the two portions of tliis iron district ; and the oper- ations of the two nuist necessarily be consid- ered together. The annual production, in- cluding that of the bloomaries of New Jer- sey, has reached, within a few years, about 140,000 tons of iron. But in a prosperous condition of the iron business this can be largely increased without greatly adding to the works already established, while the ca- pacity of tlie iron mines and supplies of fuel are unlimited. The proximity of this dis- trict to the great cities. New York and Phil- adelphia, adds greatly to its importance. Pennsylvania. — Although about one- third of all the iron manufactured in the United States is the product of the mines of Pennsylvania, and of the ores carried into the state, the comparative importance of her mines has been greatly overrated, and their large development is rather owing to the abundant supplies of mineral coal conveni- ently at hand for working the ores, and, as remarked by Mr. Lesley (" Iron Manufac- turer's Guide," p. 433), " to the energetic, persevering (ierman use for a century of years of what ores dut 800 acres, and rises to the height of CGO feet above its base. Other localities of these ores arc also known, and the occurrence of specular ore is reported by the state geologists in several other coun- ties, as I'helps, Crawford, Pulaski, La Clede, etc. In muny parts of the United States and it* territories iron is known to exist in great quan- tities. In Nebraska and Wyoming territory, near the line of the Union Pacific Railroad, large beds of iron ore of good quality are found, in proximity to extensive coal dei)osits, and these will be utilized for making rails of iron or steel for that great tiioroughfare. In Kansas, Colorado, and New Mexico, are beds of specular and olherores in great profusion. The norihern territories, as well as the Pa- cific States and lerritories, have abundant ores of ihs richest qualities, and coal enough and wood enough to melt them success- fully. IRON MANUFACTURE. Iron is known in the arts chiefly in three forms — cast iron, steel, and wrought iron. The first is a combination of metallic iron, with from 1,} to 5 or 5tV per cent, of carbon ; the second is metallic iron combined with ^- to 14 per cent, of carbon; and the third is metallic iron, free as may be from foreign substances. These dilferences of composi- tion are accompanied with remarkable diftor- ences in the qualities of the metal, by which its usefulness is greatly multiplied. The three sorts are producible as desired directly from the ores, and they are also convertible one into the other; so that the methods of manufacture are numerous, and new processes are continually introduced. The production of wrought iron direct from the rich natural oxides, was until modern times the only method of obtaining the metal. Cast iron was unknown until the 15th century. Rude nations early learned the simple method of separating the oxvgen from the ores by heat- ing them in the midst of burning charcoal ; the effect of which is to cause the oxygen to unite with the carbon in the form of carbonic acid or carbonic oxide gas, and escape, leav- ing the iron free, and in a condition to be hammered at once into bars. The heat they could command in their small fires was in- sufficient to eft'ect the combination of the iron, too, with the carbon, and produce the fusible compound known as cast iron. In modern times the great branch of the busi- ness is the production of pig metal or cast iron in blast furnaces; and this is afterward remelted and cast in moulds into the forms required, or it is converted into wrought iron to serve some of the innumerable uses of this kind of iron, or to be changed again into steel. In this order the principal branches of the manufacture will be noticed. The production of pig metal in Idnst fur- naces is tlio most economical mode of separa- ting iron from its ores, especially if these are not extremely rich. The process requiring little labor, except in charging the furnaces, and this being done in great part by labor- saving machines, it can be carried on upon an immense scale with the employment of few persons, and most of those ordinary la- borers. The business, moreover, has been greatly simplified and its scale enlarged by the substitution of mineral coal for charcoal — • the latter fuel, indeed, could never have been supplied to meet the modern demands of the manufacture. Blastfurnaces are heavy structures of stone work, usually in pyramidal form, built upon a base of 30 to 45 feet square, and from 30 to CO feet in height. The outer walls, con- structed with immense solidity and firmly bound together, inclose a central cavity, which extends from top to bottom and is lined with large fire brick of the most refrac- tory character, and specially adapted in their shapes to the re(piired contour of the interior. The form of this cavity is circular in its hori- zontal section, and from the top goes on en- larging to the lower portion, where it begins to draw in by the walls changing their slope toward the centre. This forms what are called the boshes of the furnace — the part which supports the great weight of the ores CASriNG PIU IKUN. BLAST FURNACE. CASTING STEEL INGOTS. IRON. 33 and fuel that fill the interior. For ores that melt easily and fast they are made steeper than for those which are slowly reduced. The boshes open below into the hearth — the central contracted space which the French name the crucible of the furnace. The walls of this arc constructed of the most re- fractory stones of larsfe size, carefully selected for their power to resist the action of fire, and seasoned by exposure for a year or more after being taken from the quarry. Beinc; the first portion to give out, the stack is built so that they can be replaced when necessary. The hearth is reached on each side of the stack by an arch, extending in from the out- side. On three sides the blast is introduced by iron pipes that pass through the hearth- Btones, and terminate in a hollow tuyere, which i-i kept from melting by a current of waer brought by a lead or block-tin pipe. and made to flow continually through and around its hollow shell. The fourth side is the front or working-arch of the furnace, atthe bottom of which access is had to the melted materials as they collect in the receptacle pro- vided for them at the base of the hearth or crucible. This arch opens out into the cast- ing-house, upon the floor of which are the beds in the sand for moulding the pigs into which the iron is to be cast. Upon the top of the stack around the central cavity arc constructed, in first-class furnaces, large flues, ■which open into this cavity for the purpose of taking oft' a portion of the heated gaseous mixtures, that they may be conveyed under the boilers, to be there more efteetually con- sumed, and furnish the heat for raising steam for the engines. A portion of the gases is also led into a large heating-oven, usually built on the top of the stack, in which the bhist (distributed through a series of cast iron pipes) is heated by the combustion. These pipes are then concentrated into one main, which passes down the stack and delivers the heated air to the tuyeres, thus returning to the furnace a large portion of the heat which would otherwise escape at the top, and adding powerfully to the eSiciency of the blast by its high temperature. The boilers, also conveniently arranged on the top of the furnace, especially when two furnaces are constructed near together, are heated by the escape gases without extra expense of fuel, and they furnish steam to the engines, which are usually placed below them. On account of the enormous volume of air, and the great pressure at which it is blown into the furnace, the engines are of the most power- ful kind, and the blowing cylinders are of great dimensions and strength. Some of the large anthracite furnaces employ cylin- ders 7h feet diameter, and 9 feet stroke. One of these running at the rate of 9 revolutions per minute, and its piston acting in both di- rections, should propel every minute 7,128 cubic feet of air (less the loss by leakage) into the furnace — a much greater weight than that of all the other materials introduced. It is, moreover, driven in at a pressure (pro- duced by the contracted aperture of the nozzle of the tuyeres in relation to the great volume of air) of 7 or 8 lbs. upon the square inch. Two such cylinders answer for a pair of the largest furnaces, and should be driven by separate engines, so that in case of acci- dent the available power may be extended to either or both furnaces. It is apparent that the engines, too, should be of the largest class and most perfect construction ; for the blast is designed to be continued with only tem- porary interruptions that rarely exceed an hour at a time, so long as the hcartli may remain in running order — a period, it niaj' be, of 18 months, or even 4 or 5 years. Fur- naces were formerly built against a high bank, upon the top of which the stock of ore and coal was accumulated, and thence carried across a bridge, to be delivered into the tunnel-head or mouth of the furnace. Tlie more common arrangement at present is to construct, a little to one side, an elevator, provided with two platforms of suflScient size to receive several barrows. The moving power is the weight of a body of water let into a reservoir under the platform when it is at the top. This being allowed to descend with the empty barrows, draws up the other platform with its load, and the water is dis- charged by a self-regulating valve at the bottom. The supply of water is furnished to a tank in the top either by pumps con- nected with the steam engine or by the head of its source. The furnaces of the United States, though not congregated together in such large num- bers as at some of the great establishments in England and Scotland, are unsurpassed in the perfection of their construction, apparatus, and capacity ; and none of large size are prob- ably worked in any part of Europe with such economy of materials. The Sienien's regen- erating furnace is adopted in those more recently built, wherever an intense heat is required for the reduction of the ores. 34 MINING INDUSTRY OF THE UNITED STATES. WROUGHT IRON. It ha'! been, in the pnst, a just p;rouud of comiiLiiiit against the producers of wrouf ,it iron and steel, that they could not reduce either- directly from the ore — but must go through the long and tedious processes of first waking pig orcast iron, then eliminating the carbon from the c:ist iron by a slill more teilious process to produce the wrought iron, and then restore a part of the carbon to make steel. It was said with truth that the half civilized Hindoo tribes and even the barbar- ous Fans of West Africa, made tlieir native wrought iron (the wootz of India) directly from the ore of an excellent cpiality, and by a much simpler process than was adopted either in Europe or the United States. There has been, until within the past fif- teen or eighteen years, a spirit strongly ad- verse to progress or improvement among iron producers. By tlieir rude and wasteful processes and their adherence to traditi<.)nal methods and tesis, the}' succeeded in making a fair though not very uniform quality of wrought iron, at a pretty high cost, but they deprecated any change even if it were for the better. The philosophy and chemistry of iron-making were not well understood, and the time and way of its '• coming to na- ture " a term which conveys the idea of a mystery, was a secret which could only be learned, it was thought, by some supernatural inspiration or some extraordinarj' skill, only to be acquired by long experience and care- ful observation. The Bessemer process, invented and put in practice about 1 80 2, first disturbed this popular idea; but in its earlier history this pro- cess was not entirely free from guess-work and the coming-to-nature theory by some sudden and unex|)lieable change ; subsequent discov- eries and experiments removed this mystery entirely, and there is not, to-daj', in practical chemistry and metallurgy a more thoroughly- defined science than that of making iron The iron master, who is fully educated foi his business, having before him an accuratv analysis of his ores, and knowing, as he can if he will, that they are constant in their com))osition. proceeds with the utmost cer- tainty to add other ores, or to permeate the molten ore with atmospheric air, or to force additional oxygen through it by means of nitrate of soda, nitrate of pot.assa, peroxide of iron, or other oxygen-yielding compound, or introduces a definite quantity of man- ganese, powdered charcoal, or spiegeleisen, or in some cases silica, to act as fiux and remove the sulphur, phosphorus, or other im- inn-ity, and to destroy the excess of carbon, lie knows, too, just what heat is requisite, and how long it must be continued to pro- duce a certain result e^ery time. Here is no guess-work, no " rule of thund)," no un- certainty. If he requires the best steel for rails, he can furnish it of jn'cci-ely standard cpiality every time ; if he is producing steel fiir the finest cutlerj' he can produce that; if he desires a wrought iron which shall be so tough and flexible that it can be bent double cold without any sym]itoms of flaw or crack, he knows just what percentage of the differ- ent ores, what eliminating processes, and what amount and duration of heat is neces- sary to produce it. Now, as in the past, there are different grades and qualities of cast iron, wrought iron, and steel, intended for diflx^rent pur- ]ioses, made from difterent ores, and possess- ing different degrees of tenacity, hardness, and ductility ; but the iron-maker who can- not produce from a given oi'e, or ores, that description of iron which he desires, without failure, does not understand his business. Cast iron contains, accoiding to the pur- pose for which it is intended, from five to six and a half per cent of pure carbon, either chemically or mechanically combined, and except the combination of iron with hy- drogen, which is its normal condition, it is not the better for any admixture of other metals or elements, though for some purposes a small percentage of manganese, tungsten, or even a little silicon, are not disadvantage- ous. As a matter of practical fact, however, both sulphur and phosjihorus are usually present, though in good samples in very small amount. By sulhcieiit care they can be almost entirely elimiuntod, and are so in the I o^t steel and wrought ii-oa. ; teel, according to the purpose to which •, is to be applied, contains, in chemical com- I uination it is believed, from six-tenths to one and six-tenths per cent, of carbon, and should have no other ingredient. AV'rought iron, ' apart from its ordinary combination with ! hydrogen, should be entirely free from sul- I phur, phosphorus, or silicon, and though for I some purposes, a little manganese, tungsten, and a very small percentage of carbon may not prove dis.advantageous, yet practically a pure iron is preferable to any alloy. Yet it is seldom actually free from impurities. IRON. 35 AVhat is usually denominated pure iron, melts ■with gieat ditli /ult v and only at a very mucli greater heat than either steel or east iron. Iiiat;tual prac:ice it is never melted, but when the mass attains a pasty or semi-glutinous conrlition, it is by one process or another, either hammered, pressed, or squeezed till the impurities are forced out of it. Abso- lutely pure iron, i. e. iron free from hydrogen as well as other impurities, is one of the rarest mt-tals in the world, and was isolated completely for the first time in 18G0. It is a white metal very ductile, and tenacious and so soft as to be easily cut with a knife. The Bessemer proces-i for eliminating the car- bon both for producing wrought iron and steel, as now conducted, is as follows : A quantity of pig iron of some grade whose percentage of carbon is known, is melted in one or more reverberating furnaces, accord- ing to the size of the converting vessel to b^ used, which varies in capacity from five to twelve tons. When the metal becomes fluid, it is run into tlie converting vessel, to which is applied a strong lilast of air, which com- bini's with the carbon at an intense white heat. This is coutiiuied for about eight or ten minutes, until the whole of the carbon is consumed, when the b'ast is sti)|)i)ed. It is now wrought iron, requiring unly to be squeezed or hammered tofa-ce out whatever impurities there may be in it. If, as is gen- erally tlie case, it is deemed desirable to make it into the Bessemer s'eel or homoge- neous steel or iron, as it is called on the con- tinent, a quannty of metal, usually a pure pig iron, with a known quantity of carbon, is melted and run into the converting vessel to furnish carbon in the exact proportion to make the quality of steel desired, and this combining with t!ie refined iron gives to the mass all the properties and cluiracteristics of steel. This process, though practically a very rapid one, is liable to the objection N\'hieli held agiinst the old processes, that th-re is a time in the process of eliminating the carbon from the pig iron wlien the mass of iron has just enough carbon to form good steel ; and that by this process that point is passed and the wliole of the carbon expelled, the mass reduced to the condition of wrought iron, and then brought up to the condition of steel by the addition of a percentage of cast iron. This elimination and restoration of the carbon involves waste of time, of heat, and of iron ; and hence efforts have been made to convert pig iron and iron ore into steel bj' a single process. Most of the methods proposed and abid'ng the test of actual manufacture are intended for the reduction of pig iron or ore to steel, and so come more properly under tiie head of steel ; but a few of them are equally ap- plicable to the production of wrought iron. Amo.^g these were the ingenious sugges- tions of a New York chemist. Prof A. K. Eaton, at first applied to the malleable cast iron to partially decarbonize it. lie pro- posed the use of the native carbonate of zinc as a flux to furni-h the oxygen to consume the excess of carbon. The objection to this process was two-fold — that the zinc com- bined in a small proportion with the iron, — and that the process was too expensive to be successful. He afterward proposed to sub- stitute crude soda-ash for the zinc — a sug- gestion in the right direction ; for the sodium will combine with the sulphur and phospho- rus, and thus help to remove the impurities from the iron ; but the crude soda ash is too uncertain in its composition, too full of im- purities, and does not yield its oxygen with suHicirnt readiness to be practically the best fiux f >r this purpose. The process of Messrs. ^Vlielpley & Storer seems one of the best of the numerous Ameri- can processes. The oxide of carbon, t. e. coal gas, half or imperfectl}' burned, is the grand agent for making iron and steel from all the German and English furnaces, but the great difficulty has been to apply the ])owerful agent in such a way as to reduce directly from the ore without going through the pig iron manufacture, the wrought or bar iron, or steel, and free it from the impu- rities which exist more or less in .all ores as well as in much of the pig iron. Messrs. Whelpley & Storer effect this by means of a machi le of their own invention, which is really nothing less than the chemist's blow pipe on a grand scale. The oxide of carbon is generated at the moment of using it upon the mass of ore, by the injection of a column of hot air carrying an excessively fine dust of coal or charcoal. The ore spread out upon the floor of a common reverberating furnace receives the red hot blast, while it is rajiidly stirred by the workman, and pura iron in minute grains is produced in any desired quantity, from 100 to 2,000 pounds or more at a heat. If the mass is balled up, squeezed, and passed through roller it ij 36 MINING INDUSTEY OF THE UNITED STATES. bar iron of superior quality. If the time of the process is extended one liour, or even less, the iron absorbs carbon from the blast and becomes a light sponge of steel, which melts in the crucible or steel puddling fur- nace, and is cast into ingots of sound and pure metal. If continued still longer larger quan- tities of carbon are absorbed and the mass is converted into cast iron. The steel and cast iron as well as the bar iron are of su[)erior quality, and remarkable tenacity and strength. Steel is made in this process in eight hours from crude ore to finished bar ; and bar iron in little more than half that time. It is re- quisite to the success of the jM-ocess that the carbon should be pulverized to an impalpa- ble powder of the last degree of fineness, that thus infinitely subdivided and blown upon the mass it may carry condensed upon its surface nearly oxygen enough to consume it, and thus produce extreme rapidity, in- tensity, and thoroughness of combustion. This pulveriz.ation is effected, for the first time, by an ingenious machine invented by Messrs. AVhelpley & Storer. What Messrs. Whelpley& Storer accomplish by their great blow-pipe and minute pulverization of car- bon, Mr. C. W. Siemens effects in an en- tirely different way b}^ his regenerating fur- nace ; an apparatus requiring, in the first place, a somewhat more extensive .and costly structure, but in the end accomplishing the same result of producing a rapid and intense heat and an atmos])here of oxide of carbon with a comparatively small expenditure of fuel. The necessity that tiie furnace linings should be almost absolutely indestructible by the intense heat generated makes the first cost of a regenerating furnace very heav}'. There are three distinct principles em- bodied in the Siemens' furnace, viz: the application of gaseous fuel ; the regeneration of heat by means of piles of bricks alternately passed over by the waste gases and by the atmospheric air entering the furnace before their combustion ; and the chemical action of these gases in combining with the impurities of the ore or the pig iron, and in modifying the quantity of carbon in combination with the iron, for the production of steel. The gas [)roducer is a brick chamber of convenient size, say six feet wide by twelve long, with its front wall inclined at an angle of 4,5'^ to 60'^, .according to the nature of the fuel used. The inclined plane is solid about half way down, and below this it is con- structed as a grate with horizontal bars. It is what is called a base-burner, the openings for introducing the coal being on the top or roof of this chamber, and the air which en- ters through the grate effects the combustion of the coal at the lowest points of the cham- ber. The products of this combustion rise and are decomposed by the superposed strata of coal above them ; they are, moreover, mixed with a quantity of steam which is drawn in through the grate from a constant supply of water maintained underneath the latter. The steam in contact with the in- candescent coal also decomposes and produ- ces hydrogen and carbonic oxide gas, which are mixed with the gases produced by the coal direct. The whole volume of these gases is then conducted to the furnace itself by means of wrought iron pipes. The gases enter one of the regenerators. The regen- erators are chambers packed with fire-bricks, which are built up in walls, with interstices and air-spaces between them (cob-house fash- ion as we sliould say) allowing of a free pas- sage of gas around each brick. Each regen- erator consists of two adjoining chambers of this kind, with air-passages parallel to each other, one passage destined for the gaseous fuel, and the other for the supply of atmos- pheric air required for combustion. Each furnace has two such regeneratoi's, and a set of valves is provided in the main passa- ges or flues, which permit of directing the gases from the producer to the bottom of either of the two regenerators. The gases after passing one regenerator arrive at the furnace, where they are mixed with the air di-awn in at the same time, and produce a flame of great heat and intensity within the body of the furnace itself. They then pass, after combustion, into the second regenerator which forms a set of down flues for the waste gases, .and ultimately leads them off into a common chimney. On their way from the furnace to the cliimney the heated products of combustion raise the temperature of the fire-bricks, over which they pass, to a very high degree, and the gases are so much cooled that, at the base of the chimney, they do not produce a temperature of much more than 300" Fahrenheit. After a certain time the fire-bricks close to the furnace obtain a temperature almost equal to that of the fur- nace itself, and a gr.adually diminishing tem- perature exists in the bricks of the regenera- tor proportionate to their distance from the furnace. At this moment the .attendant, by reversing the different valves of the furnace. IRON. 37 opens the heated regenerator for the entrance of the gaseous fuel' and atmospheric air, at the same time connecting the other regen- erator with the chinniey for taking off tlie products of combustion. The entire current of gases through the furnace is thus reversed. Tlie cold air from tiie atmosphere, and the comparatively cold gases from the producer, in passing over bricks of gradually increas- ing temperature as they approach tlie furnace become intensely heated, and when they are mixed in the furnace itself, enter into com- bustion under the most favorable circumstan- ces for the production of an intense heat, often rising to 4000° Fahreidieit in the furnace. By changing the relative proportion of air and gas admitted through the flues, the na- ture of the flame may be altered at will. A surplus of oxygen from the introduction of more than half the volume of atmospheric air will produce an oxidizing flame, suited to the production of very pure bar iron. By the admission of a surplus of gas, on the con- trarj', the flame can be made of a reductive character and used accordingly for deoxida- tion. Berard's process for making steel by gas, directly from pig iron, or ore, requires the Siemens furnace, which he constructs with the bottom formed into two parts each hol- lowed out like a dish, with a bridge between them, upon which the pigs introduced into the furnace receive a preliminary heating. The flame is maintained with a surplus of oxygen, and a quantity of pig iron is melted in one of the chambers or dishes. The oxi- dizing action of the flame decarbonizes and refines the pig iron, and after a certain time a second quantity of pigs is thrown into the second dish and melted there. The flame is now reversed in its direction ; the oxidiz- I ing flame is made to enter at tlie side where the fresh pig is placed. In passing over this, and oxidizing the carbon, silicon, and other impurities in the iron, the flame loses its sur- plus oxygen, and becomes of a neutral, or at least onl}' slightly oxidizing character. In this state it passes over the other bath of molten iron, now partly refined, and it con- tinues to act upon the impurities without at- tacking the iron itself. At a certain moment this portion of iron is completely converted into steel, and that part of the furnace is then tapped, so as to make room for a fresh charge of pigs in that place. After that, the current of gases is again reversed, the second bath j now entering into the position previously taken by the first, and so the process is car- ried on continuously with two portions of iron — one freshly introduced and acted upon by the oxidizing flame, the other partly con- verted into steel and exposed to the neutral flame passing away from the first. M. Be- rard states that bj' protracting his process, and by adding spiegeleisen he can remove sulphur and phosphorus from the iron, and make steel from inferior pigs. The Messrs. Martin of SLreuil, France, have, with a Siemens furnace, succeeded in melting with pig iron, old iron rails, wrought iron scrap, puddled steel, &c., in the propor- tion of two-thirds old rails to one-third pig iron, and have made from the compound an excellent and low-priced steel for rails. Mr. Siemens himself patented, in 1868, and has since that time worked, a process for making natural or " raw" steel directly from the ore by means of a modification of his furnace. This can onlj' be done successfully it is said by the use of the purest and best ores. Of other processes we may mention that of Mr. James Henderson, an eminent founder, of Brooklyn, N. Y., who, using the Bessemer process, has improved it by charg- ing the blast furnace with a mixture of iron and Manganese ores, or any of the INIanga- niferous iron ores, thus incorporating the indispensable manganese, and causing it to exert its beneficial influence in purifying and refining the iron, at the beginning, instead of the end of the pneumatic process. Mr. John Ileaton of Nottingham, England, has been successful in oxidizing and remov- ing the carbon and other impurities with great rapidity by the use of nitrate of soda with the molten metal in the following way : The '• converter " consists of a large wrought iron pot, lined with fire clay ; into the bot- tom of this a suitable quantity (about 6 per cent, usually of the weight of the pig iron or ore), of crude nitrate of soda combined with silicious sand, is introduced, and the whole covered with a cast-iron perforated plate. The molten pig is then poured in and in about two minutes the reaction commences ; at first, brown nitrous flimes are evolved, and after a lapse of five or six minutes, a violent deflagration occurs attended with a loud roaring noise, and a burst from the top of the chimney of brilliant yellow flame, which, in about a minute and a half subsides as rapidly as it commenced. When all has become tranquil the converter is detached fi'om the cliimney and its contents emptied 38 MINING INDUSTUY OF THE UNITED STATES. upon the iron pavement of the foundry. The steel thus produced is pronounceusquehaun;i, '25 mills 21.218 Near Wiluiiii^ton, Delaware, 3 mills 1,374 Between Wilmington and Baltimore, 1 mills. 2,998 Pittsburg, Penn.. 14 mills. Sheet iron. 6,437; boiler iron, 3,212; be.sides bars, rod.s, hoops, and nails 9,649 Sheet iron atthe Sharon mill, MercerCo. Penn. 500 Bloom mill, Portsmouth, S. Ohio, and Globe mill, Cincinnati, about 2,000 38,289 A mill for boiler plate has been erected at St. Louis. Iron Wire. — The uses of iron wire have greatly increased within a few years past. The telegraph has created a large demand for it ; and with the demand the manufac- ture has been so much improved, especially in this country, that the wire has been found applicable to many purposes for which brass or copper wire was before required. It is prepared from small rods, which are passed throufrh a succession of holes, of decreasing sizes, made in steel plates, the wire being annealed as often as may be necessary to prevent its becoming brittle. In this branch the American maimfacturers liave attained the highest perfection. The iron prepared from our magnetic and specular ore is un- equalled in the combined qualities of strength and flexibility, and is used almost exclusively for purposes in which those qualities are es- sential. But where stiffness combined with strength is more important, Swedish and Norwegian iron also are used. Much of the iron wire now made is almost as pliable as copper wire, while its strength is about 50 per cent, greater. In Worcester, Mass., a large contract has been satisfactorily filled for No. 10 wire, one of the conditions of which was that the wire, when cold, might be tightly wound around .another wire of the same size without cracking or becoming rouffh on the surface. Such wire is an ex- cellent material for ropes, and considerable American iron is already required for this use, especially for suspension bridges. AVires are also used for fences, and are ingeniously woven into ornamental patterns. The so- called " netting fence," thus made, can be rolled up like a carpet. For heavier railing and fences, as for the front yards of houses, for balconies, window guards, etc., iron bars and rods are now worked into ornamental open designs, by powerfully crimping them and weaving them together like wires. Nails — Among the multitude of other itnportant applications of malleable iron, that of nail making is particularly worthy of no- tice, as being in the machine branch of it — the preparation of cut nails — entirely an American process. Our advance in this de- partment is ascribed to the great demand for nails among ns in the construction of wooden houses. In England, even into the present century, nails were wrought only by hand, employing a large population. In the vi- cinitv of Birmingham it was estimated that 60,000 persons were occupied wholly in nail making. Females and children, as well as men, worked in the shop, forging the nails upon anvils, from the "split iron rods" fur- nished for the purpose from the neighboring iron works. The contrast is very striking between their operations and those of the great establishments in Pennsylvania, con- sisting of the blast furnaces, in which the ores are converted into pig ; of the puddling furnaces, in which this is made into wrought iron ; of the rolling and slitting mills, by which the malleable iron is made into nail- plates ; and of the nail machines, which cut up the plates and turn them into nails — all going on consecutively under the same roof, and not allowing time for the iron to cool until it is in the finished state, and single establishments producing more nails than the greater part of the workshops of Birming- ham fifty years ago. Public attention was directed to machine-made nails as long ago as 1810, by a report of the secretary of the treasury, in which he referred to the success already attained in their manufacture in Mas- sachusetts. " Twenty years ago," he states, " some men, now unknown, then in ob- scurity, began by cutting slices out of old hoops, and, by a common vice gripping these pieces, headed them with several strokes of the hammer. By progressive improvements, slitting mills were built, and the shears and the heading tools were perfected, yet much 42 MINING INDUSTRY OF THE UNITED STATES. labor and expense were requisite to make nails. In a little time, Jacob Perkins, Jona- than Jlllis, and a few others, put into execu- tion the thought of cutting and of heading nails by water ; but being more intent upon their macliinery than upon their pecuniar}' affairs, they were unable to prosecute the business. At different times other men have epent fortunes in improvements, and it may be said with truth that more than a million of dollars have been expended ; but at length these joint efforts are crowned with com- plete success, and we are now able to manu- facture, at about one-third of the expense that wrought nails can be manufactured for, nails which are superior to them for at least three-fourths of the purposes to which nails are applied, and for most of those purposes they are full as good. The machines made use of by Odiorne, those invented by Jona- than Ellis, and a few others, present very fine specimens of American genius." The report then describes the peculiar character of the cut nail — that it was used by northern carpenters without their having to bore a hole to prevent its splitting the wood ; that it would penetrate harder wood than the wrought nail, etc. At that time, it states, there were twelve rolling and slitting mills in Massachusetts, chietly employed in rolling nail plates, making nail rods, hoops, tires, sheet iron, and copj>er, and turning out about 3,500 tons, of which about 2,400 tons were cut up into nails and brads. From that time to the present the manufacture of nails by machinery has been a profitable branch of industry in the south-eastern part of Massa- chusetts, the iron and the coal being fur- nished from the middle Atlantic states, and the nails, in great part, finding a market at the south. The following table presents the number of nail mills in operation in 1856. The smaller establishments are grad- ually going out of the business, and tiiis is becoming more concentrated in the coal and iron regions, thus saving the cost of trans- portation in these heavy articles. The man- ufacturers of New England, however, ingeni- ously divert a part of their operations to the production of smaller articles, with which the cost of transportation is a less item in proportion to their value, such as tacks, riv- ets, screws, butts, wire, and numerous fin- ished articles, the value of wliich consists more in the labor performed upon them and in the use of ingenious machinery than in the cost of the crude materials employed. NAIL FACTORIES IN THE UNITED STATES, AND TBEIR PRO- DLICTION IN IS.'jtJ. Tons. In south New England, 12 mills, nails prin- cipally 25,000 Troy, New York 4,000 Rockaway, Boonton, New Jersey, nails and spikes ' 8,250 Soulliern New Jersey 4,167 On llie Scliuylkill. 5 mills, about 9,000 On tlie lower Susqueliaima, 2 mills, about.. . 2,600 Middle Pennsylvania, 2 n;ills, about 2.000 Maryland, 2 mills 2,155 Richmond, 1 mill- 1,07 5 Piltslmrp, 14 mills, nails, spikes, rivets, tacks 14,195 Wheeling, 2 mills 6,465 Ironton, southern Ohio, 1 mill 775 Mahoning Co., N. K. Ohio, 1 mill 380 Buffalo 1,400 Total 81,462 The number of nail machines employed in these mills was 2,645. A great variety of machines have been devised for nail making, very ingenious in their designs, and all too complicated for description. The iron is rolled out into bars for this manufacture, of 10 or 12 feet in length, and wide enough to make three or more strips, each one of which is as wide as the length of the nail it is to make. The cutting of these strips from the wider bars is the special work of the slitting mill, which is, in fact, but a branch of the rolling opera- tion, and carried on in conjunction witli it. The slitting machine consists of a pair of rolls, one above the other, each having 5 or 6 steel disks upon its axis, set as far apart as the width required for the nail-rod. Those upon one roll interlock with those upon the other, so that when the wide bar is intro- duced it is pressed into the grooves above and below, and cut into as many strips as there are spaces between the disks. This work is done with wonderful iaj)idity, several bars being passed through at once. In the nail factory each nail-making machine works upon one of these strips, or nail-rods, at a time, first clipping ott' a piece from the end presented to it, and ininicdiately another, as the flat rod is turned over and the end is again presented to the cutter. The reason of turning it over for each succes.sive cut is because the piece cut off for the nail is tapering, in order to make it a little wider at the end intended for the head than at the other, and thus, making the wider cut on al- ternate sides of the rod, this is regularly worked up into pieces of the proper shape. In the older operations a workman always sat in front of each machine, holding the IRON. 43 rod and turning it over with every clip; but by a modern improvement this work is alsii done by mechanical contrivance. Eacli piece, as fast as it is clipped oft", disappears in the machine. There it is seized between powerful jaws, and the bead is pressed up from the large end by the short, powerful motion imparted to the piece of apparatus called the header. As it is released, it slides down and di'ops upon the floor, or in a vessel placed to receive the nails. Machinery has been applied in the United States to tlie manufacture of horse-shoe nails, according to a number of patented plans. Of these, tiie most successful is probably that invented about the year 1848, by Mr. L. G. Reynolds, of Providence ; also the inventor of the solid-he.adod pin. The form of this nail could not be given as in ordinary cut nails by the cutter, but the sides required to be pressed as well as the head. This in- volved the use of movable plates of suitable figure ; and as it was found that the nails could not be shaped except when the metal was softened by heat, the plates must neces- sarily be of the hardest steel, and protected as cll'octually as possible from the effects of constant working of heated iron. These difficulties were fully overcome, and tlie nails, after being turned out, were toughened bv annealing, givinn; them all the excellent qualities of iiand-made nails, with the ad- vantage of perfect uniformity of size, so that one nail answers as well as another for the holes in the horse-shoes. They are, more- over, made with great rapidity, each machine producing half a ton of nails in 12 hours. The process has been taken to Europe, and is there in successful operation. Spikes, also, liave been made ami headed in similar ma- chines ; and among all small articles in iron, none, perhaps, has proved so profitable to the inventor as the liook-headed spike, used for holding down, by its projecting head, the edge of the iron rails to the sill. This was the invention of Mr. Henry liurden, of Troy, whose machines for wrought-iron spikes and fir horse-shoes have also proved very success- ful. By the latter, perfect shoes are turned out at the rate of 60 in a minute. This proc- ess has been introduced in most of the European countries. As already remarked, steel differs in com- position from metallic iron only by contain- ing from i to li per cent, of carbon, and from cast-iron by the latter containing a larger proportion of carbon, which may amount to 5.5 per cent. To readily convert these varieties into each other is an object of no small importance, for their properties are so entirely distinct, that they really serve the purposes of three difl'erent metals. Steel is particularly valuable for its extreme hard- ness, fine (Train, and compact texture, which admits of its receiving a high polish. It is the most elastic of metals, and mucli less liable to rust than iron. It has the peculiar property of assuming different degrees of hardness, according to the rapidity with which it is chilled when heated ; and it may be melted and run into moulds like cast iron, and the ingots thus prepared may be ham- mered, rolled, and forged into shapes like wrought iron ; and these may finally be tem- pered to any degree of hardness desired. Dift'ering so little in composition from me- tallic iron and from cast iron, and being so universally in demand for a multitude of uses, it would seem that it ought to be pro- duced as cheaply as one or the other of the varieties, between which its composition places it. But this is far from being the case. While pig iron is worth only $20 to $.')0 per ton, and bar iron $60 to $90, ca.st steel in bars is worth from $250 to $300 per ton. This is chiefly owing to the difficulty of procuring in large quantities steel of uni- form character, which the consumers of the article can purchase with perfect confidence that it is what they require and liave been accustomed to use. The English boast, with good reason, of the position they occupy in this manufacture, which is almost a monopoly of the steel trade of the whole world. Though producing themselves little or no iron fit lor making alone the best steel, they have im- ported enough of the Swedish and Norwe- gian bar iron to insure a good quality, and have been especially cautious to render this as uniform as possible. Their method of manufacture is to introduce carbon into the wrought iron by what is called the cementing process. On the continent of Europe steel is made to some extent, in Silesia and Styria, by removing from cast iron enough of its carbon to leave the proper proportion for steel, and then melting the product and cast- inne or in combination with charcoal powder. At an intense heat this salt rapidly carbon- izes the iron, wliich thus first becomes steel, then fuses, and is poured into moulds. The quantity of the salt employed is proportional to the quantity of the iron and the quality of the steel required. The operation is suc- cessfully carried on in difl'erent establish- ments in New Jersey, New York, and Penn- sylvania, and cast steel of the very best quality is produced at less expense than the article has ever before cost in this country. For bar steel, according to the prospectus of the company, the best charcoal-made iron is employed, costing |>86 per ton, and this, to- gether with the coal used for fuel, the cliem- ical materials, the melting, crucibles, and hammering, make the whole cost about $142 per ton, while that of the imported article is i>300 or more. The great difficulty in the process is to obtain suitable crucibles for withstanding the intense heat required to melt the charge of 60 lbs. of malleable iron. Those in use are blue-pots, costing $1.60 each. Though made of the best of plum- bago, they stand only two or three meltings. The other process, which is just now in- troduced into practice, is based upon the prop- erty of carbonate of soda to remove from cast iron the carbon it contains, when the metal is kept for a few hours in a bath of the melted alkali. The decarbonizing ett'ect is in part due to the action of the oxygon of the alkaline base, which is given up to the carbon of highly heated cast iron, but principally to the decom- position of the combined carbonic acid, which gives to the carbon one of its atoms of oxygen, and is resolved into carbonic oxide. This prop- erty of soda was discoverot named year, 572,386 ton-; were im[)orted from Great Britain. The census of 1860 gives the following statistics of the iron production and manu- facture of that year. There had been very little progress in the production of iron in the country for several years previous, in consequence of the very low rate of duty at which foreign railroad and other iron was admitted. Iron blooms, valued at $2,623,178 Pig iron 20,870,120 Bar, sheet and railroad iron.. 31,888,705 Iron wire 1,643,857 Iron forgings 1,'.HI7,4G0 Car wheels 2,033^350 Iron castings of all kinds 36,132,033 $97,148,705 The opening of the war, in 1801, gave an extraordinary impetus to iron production and manufacture. The tariff and other causes reduced the importation to a mini- mum, while the demand for iron for the fabrication of small arms and cannon ; for the construction of the large fleet of iron- clads, and for the other war vessels; for the building of locomotives, the casting of car wheels and furnishing the vast quantity of railroad iron needed to repair the old tracks destroyed by the contending armies, and to lay the tracks of new roads, extended the business vastly beyond all former precedeTit; and the requirement that the Pacific railroad and its branches shall be constructed solely of American iron, as well as the increase in its use for buildings, and for shipping, have maintained it in a prosperous condition. The manufacture of steel and the other manufactures of iron, aside from those al- ready enumerated, brought the aggregate production and manufacture of iron and steel, in 1860, up to $285,879,510. The revenue tax paid on iron and steel manufac- tures in 1864 indicates that the product of the branches taxed amounted to about 812.3,000,000. This estimate was far below the production, as many branches were not taxed, and the returns of that year were im- perfect. The production and manufacture of 1865 were not less than 400 millionsof dollars. There is every reason to expect that the de- velopment of the iron mines will be pushed forward with con.stantly increasing energy, and that the time is not far distant when many of the great repositories of ores we have described — now almost untouched — will be the seats of an active industry and centres of a thriving population, su]iported by the home markets they will create. The great valley of tlie west, when filled with the population it is capable of supporting, and intersected in every direction with the vast system of railroads, of which the present lines form but the mere outlines, will itself require more iron than the world now pro- duces, and the transportation of large por- tions of this from the great iron regions of northern Michigan and Wisconsin, and of 48 MINING INDUSTRY OF THE UNITED STATES. coal back to the mines, will sustain larger lines of transportation than have ever yet been employed in conveying to their markets the most important products of the country. The importation of foreign iron — already falling otl' in proportion to the increased con- sumption — must, before many years, cease, and be succeeded by exports for the supplies of other nations less bountifully provided for in this respect than the United States and Great Britain. CHAPTER II. COPPER. The early attempts to work copper mines in the United States have already been al- luded to in the introductory remarks to the department of this work relating to mining industry. The ores of this metal .ire widely distributed throughout the country, and in almost every one of the states have been found in quantities that encouraged their ex- ploration — in the great majority of cases to the loss of those interested. The metal is met witli in all the New England states, but only those localities need be named which have at times been looked upon as important. Copper occurs in a native or metallic state, and also in a variety of ores, or combi- nations of the metal with other substances. In these forms tlie metallic appearance is lost, and the metal is obtained by different metallurgical operations, an account of some of which will be presented in the course of this chapter. Until the discovery of the Lake Superior mines, native copper, from its scarcity, was regarded rather as a curiosity than as an important source of supply. The workable ores were chiefly pyritous copper, vitreous copper, variegated copper, the red oxide, the green carbonate or malachite, and chrysocolla. The first named, though con- taining the least proportion of copper, has furnished more of the metal than all the other ores together, and is the chief depen- dence of most of the urines. It is a double sulphuret of copper and iron, of bright yel- low color, and consists, when pure, of about 34 per cent, of copper, 35 of sulphur, and 30 of iron. But the ore is always inter- mixed with quartz or other earthy minerals, bv which its richness is greatly reduced. As brousiht out from the mine it m.iy not con- tain more than 1 per cent, of copper, and ■when freed as far as practicable from foreign substances by the mechanical processes of assorting, crushing, washing, jigging, etc., and brought up to a percentage of 6 or 7 of copper, it is in Cornwall a merchantable ore, and the mine producing in large quantity the poor material from which it is obtained may be a profitable one. Vitreous coj)per, known J also as copper glance, and sulphuret of cop- 1 per, is a lead gray ore, very soft, and con- tains 79.8 per cent, of copper, united with 20.2 per cent, of sulphur. It is not often fiiund in large quantity. Variegated or pur- ple copper is distinguished by its various shades of color and brittle texture. It yields, when pure, from 56 to 63 per cent, of copper, 21 to 28 of sulphur, and 7 to 14 of iron. The red oxide is a beautiful ore of ruby red color, and consists of 88.8 per cent, of cop- per and 11.2 per cent, of oxygen. It is rarely found in sufficient quantity to add nuieh to the products of the mines. Green malachite is a highly ornamental stone, of richly variegated shades of green, famous as the material of costly vases, tables, etc., man- ufactured in Siberia for the Russian govern- ment. It is always met with in copper mines, especially near the surface, but rarely in large or handsome masses. It consists of copper 57.5, oxygen 14.4, carbonic acid 19.9, and water 8.2 per cent. Chrysocolla is a combination of oxide of copper and silica, of greenish shades, and is met with as an incrustation upon other copper ores. It often closely resembles the malachite in ap- pearance. It contains about 36 per cent, of copper. The first mines worked in the United States were peculiar for the rich character of their ores. These were, in great part, vitreous and variegated copper, with some malachite, and were found in beds, strings, and bunches in the red sandstone formation, especially along its line of contact with the gneiss and granitic rocks in Connecticut, and with the trap rocks in New Jersey. The mine at Simsbury, in Connecticut, furnished a considerable amount of such ores from the year 1709 till it was purchased, about the middle of the last century, by the stale, from which time it was occupied for sixty years as a prison, and worked by the con- victs ; not, however, to much profit. In 1830 it came into possession of a company, but was only worked for a short time after- ward. On the same geological range, but lying cliiefly in the gneiss rocks, the most productive of these mines was opened in 49 18:36, in Bristol, Conn. It was vigorously- worked from 1847 to 1857, and produced lar(;er amounts of rich vitreous and pyritous ores than have been obtained from any other mine in the United States. No expense was spared in prosecuting the mining, and in furnishing efficient machinery for dressing the ores. Although 1800 tons of ore, producing over $200,000, were sent to market, the ore yielding from 18 to 5U per cent, of copper, the mine proved a losing afl'air, and was finally abandoned in 1857. The New Jersey mines have all failed. from insufficient supply of the ores. The Sehuyler mine, at Belleville, produced rich vitreous copper and chrysocoUa, disseminated through a stratum of light brown sandstone, of 20 to 30 feet in thickness, and dipping at an angle of 12°. During the periods of its being worked in the last century, the exca- vations reached the depth of 200 feet, and were carried to great distances on the course of the metalliferous stratum. The mine was then so hitvhly valued that an offer of £500,- 000, made for it by an English company, was refused by the proprietor, Mr. Schuyler. In 1857-58 attempts were made by a New York company to work the mine again, but the enterprise soon failed. Among the other mines which have been worked to consid- erable extent in New Jersev are the Flem- ington mine, which resembled in the char- acter of its ore the Schuyler mine, and tJie Bridgcwatcr mine, near Somerville, at which native copper in some quantity was found in the last century ; twopiecosmet with in 1754 weighing together, it was reported, 1,900 lbs. A mine near New Brunswick also furnished many lumps of native copper, and thin sheets of the metal were found included in the sand- stone. At diflerent times this mine has been thoroughlv explored, to the loss of those en- gaged in the enterprise. In Somerset county, the Franklin mine, near Griggstown, has been worked to the depth of 100 feet. Carbonate and red oxide of copper were found in the shales near the trap, but not in quantity suf- ficient to pay expenses. In Pennsylvania, near the Schuylkill river, in Montgomery and Chester counties, many mines have been worked for copper and lead at tlie junction of the red sandstone and gneiss. Those veins included wholly in the shales of the red sandstone group were found to produce copper chiefly, while those in the gneiss were productive in lead ores. At the Ferkiomen and Ecton mines — both upon the same lode — extensive mining operations have been carried on ; a shaft upon the latter having reached in 1853 the depth of 396 feet. The sales of copper ores during the three years the mines were actively worked amounted to over $40,500 ; but the product was not sufficient to meet the expenditures. The mines in Frederick county, Maryland, in the neighborhood of Liberty, were near the red sandstone formation, though included in argillaceous and talcose slates. A num- ber of them have been worked at difierent times up to the year 1853, when they were finally given up as unprofitable. A more newly discovered and richer cop- per district in Maryland is near Sykesvillo, on the Baltimore and Ohio railroad, 32 miles from Baltimore, in a region of micaceous, talcose, and chloritic slates. A large bed of specular iron ore lying between the slates was found to contain, at some depth below the surface, carbonates and silicates of cop- per, and still further down copper pyrites. In the twelve months preceding April 1, 1857, 300 tons had been mined and sent to market, the value of which was §17,896.92, and the mine was reported as improving. The ore sent to the smelting works at Balti- more, in December of that year, yielded 16.03 per cent, of copper. Witliin seven miles of Baltimore the Bare Hill mine lias produced considerable copper, associated with the chromic iron of that region. Like the last two named, all the otlier lo- calities of copper ores of any importance along the Appalachian chain and east of it are remote from the range of the red sand- stone, and belong to older rock formations. In the granites of New Hampshire, pyritous copper has been found in many places, but has nowhere been mined to any extent. In Ver- mont, mining operations were carried on for several years upon a large lode of pyritous copper, which was traced several miles through Vershire and Corinth. At Straf- ford, pyritous ores were worked in 1829 and afterward, both for copperas and cop()er. In New York, excellent pyritous ores were pro- duced at the Ulster lead mine in 185.3. Among other sales of similar qualities ofore, one lot of 50 tons produced 24.3 per cent, of copper. In Virginia, rich ores of red oxide of cop- per, associated with native copper and pyri- tous copper, are found in the metamorphic slates at Manasses Gap, and also in many [ other places further south along the Blue 50 MINING INDUSTRY OF THE UNITED STATES. Ridge. The very promising appearance of tlie ores, and their numerous localities, would encourage one to believe that this will prove to l:>e a copper region, were it not that, when explored, the ores do not seem to lie in any regular form of vein. In the southern part of the state, in Carroll, Floyd, and Grayson counties, copper was discovered in 1852, and mines were soon after opened in a district of metainorphic slates, near their junction with the lower silurian limestones. The copper was met with in the form of pyritous ore, red oxide, and black copper, beneath large outcropping masses of hematite iron ore, or gossan. Some of the shipments are said to have yielded over '20 per cent, of copper. The amount of ores sent east, over the Virginia and Tennessee railroad, in 1855, was 1,931,40:! lbs. ; in 1850, 1,972,834 lbs.; and in the nine months ending June 30, 1857, 1,085,997 lbs.; 1858, 088,418 lbs.; 1859, 1,151,132 lbs.; and 1800, 2,679,673 lbs. Copper ores are very generally met witli in the gold mines of this state, and further south, but the only one of them that has been worked expressly for copper is that of the North Carolina Copper Company, in Guilford county. From this a considerable amount of pyritous copper ores were sent to the north in 1852 and 1853. In Tennessee, an important copper region lies along the southern line of I'olk couTity, and extends into Gilmer county, Georgia. The ore was first found in 1847, associated with masses of hematite iron ores, which formed great outcrop])ing ledges, traceable for miles from south-west to north-east along the range of the micaceous and talcose slates. An examination of the ores, made to ascer- tain the cause of their working badly in the furnace, was the means of corroborating or giving importance to the discovery of the copper. In 1851 copper mining was com- menced, and afterward prosecuted with great activity by a number of companies. The ore was found in seven or eight parallel lodes of the ferruginous matters, all within a belt of a mile in width. At the surface there was no appearance of it, but as the explora- tions reached the depth of seventy -five or one Imndred feet below the surface of the bills, it was met with in various forms, re- sulting from the decomposition of pyritous copper, and much mixed with the ochreous matters derived from a similar source. In a soft black mass, easily worked by the pick, and of extraordinary dimensions, were found intermixed ditferent oxides and other ores of copper, yielding various proportions of metal, and much of it producing 20 per cent, and more, fit to be barrelled up at once for transportation. This ore spread out in a sheet, varying in width at the dift'erent mines ; at the Eureka mine it was 50 feet wide, and at the Iliwassee 45 feet, while at the Isabella mine the excavations have been extended between two walls 250 feet apart. In depth this ore is limited to a few feet only, except as it forms bunches running up into the gossan or ochreous ores. Below the black ore is the undecomposed lode, consist- ing of quartz, more or less charged with pyritous copper, red oxide, green carbonate, and gray sulphuret of copper ; and it is upon these the permanent success of the mines must depend. About 14 mining companies have been engaged in this district, and the production of the most successful of them was as follows, up to the year 1858: Isa- bella, 2,500 tons; Calloway, 200; Mary's, 1,500 ; Polk county, 2,100 ; Tennessee, 2,200 ; Hiwassee, 2,500 ; Hancock, 2,000 — making a total of 13,000 tons, yielding from 15 to 40 per cent, of copper, and worth ^100 per ton, or $1,300,000. In addition to this, the products of the London mine, yielding an average of 45 per cent, of copper, amount- ed to over $200,000 in value ; and the prod- ucts of the Eureka mine were rated for 1855 at $86,000; for 1856 at $123,000; and for 1857 at $136,000. The value of the ores remaining at the mines too poor to transport, but valuable to smelt in furnaces on the spot, was estimated at $200,000 more. Furnaces for smelting, on the German plan, were in operation in 1857, and produced the next year 850 tons of matt, or regulus. At the Eureka mine, in 1858, there were 4 reverbcratory furnaces, 2 blast, and 2 cal- cining furnaces. The fuel employed is wood and charcoal. By the introduction of smelt- ing operations, ores of 5 to 6 per cent, are now advantageously reduced. In 1857 the mines of a large portion of this district were incorporated into the so- called Union Consolidated Mining Companv, and most of the other mines were taken up by the Burra Burra Company and the Polk County Company. The principal interests in the last two are held in New Orleans. The first named own 1 1 mines, of which they are working three only, with a monthly production of 750 to SuO tons of 12 per cent, copper, besides 5 or 6 tons of precipitate 51 copper. This is metallic copper, precipitated from the waters of the mine by means of scrap iron thrown into tbe vats in which these waters are collected. The iron being taken up by the acids whicli hold the cop- per in solution, tlie latter is set free, and de- posited in line metallic powder. The ore is smelted in furnaces constructed on the Ger- man plan, and beinsj put through twice, pro- duce a regulus of 55 per cent. As soon as the proper furnaces and refineries can be constructed, it is intended to make ingot copper, and by working more of the mines belonging to the company it is expected the monthly production will soon be raised to 2,000 tons of 10 to 12 per cent. ore. The two other companies have erected ex- tensive smelting works ; and the mines of the Burra Burra are producing 450 to 500 tons per month of 14 per cent, ore, and those of the Polk County Company about 300 tons of 15 per cent. ore. Both com- panies will soon be able to make ingot cop- per. The report of the Union Consolidated Company for the first year of their opera- tions presents, against expenditures amount- ing to S!307,182."77, receipts of 8457,803.73, leaving a profit of §150,620.96. A large portion of the regulus is shipped to England for sale. The profits of these mines were greatly reduced the first few years of their operation by the necessity of transporting the ores 40 miles to a railroad, and thence more than 1,000 miles by land and water to the north- ern smelting works. The establishment of furnaces at the mines not only reduces this source of loss, but renders the great body of poorer ores available, which they were not before. A railroad is now in process of con- struction to connect the mines with the Georgia railroads. West of the Alleghanies, the onl}- copper mines, besides those of Lake Superior, are in the lead region of Wisconsin, Iowa, and Missouri. A considerable ntimber of them have been worked to limited extent, and small blast furnaces have been in operation smelting tlie ores. These were found only near the surface, in the crevices that con- tained the lead ores ; and in Missouri, in horizontal beds in the limestone, along the line of contact of the granite. The ores were mixed pyritous copper and carbonate, always in very limited quantity. The amount of copper produced has been unimportant, and it is not likely that any considerable in- crease in the supply of the metal will be de- rived from this source. The existence of native copper on ths shores of Lake Superior, is noticed in the reports of the Jesuit missionaries of 1659 and 1666. Pieces of the metal 10 to 20 lbs. in weight were seen, which it is said the Indians reverenced as sacred ; similar reports were brought by Father Dablou in 1 670, and by Charlevoix in 1744. An attempt was made in 1771 by an Englishman, named Alexander Henry, to open a mine near the forks of the Ontonagon, on the baidc of the river, where a large mass of the metal lay ex- posed. He had visited the region in 1763, and returned with a party prepared for more thoroughly exploring its resources. They, however, found no more copper besides the loose mass, which they were unable to re- move. They then went over to the north shore of the lake, but met with no better success there. General Cass and Mr. 11. R. Schoolcraft visited the region in 1819, and reported on the great mass upon the Onton- agon. Major Long, also, in 1823, bore wit- ness to the occurrence of the metal along the shores of the take. The country, till the ratification of the treaty with the Chip- pewa Indians in 1842, was scarcely ever visited except by hunters and fur-traders, and was only accessible by a tedious voyage in canoes from Mackinaw. The fur com- panies discouraged, and could exclude from the territorv, all explorers not going there under their auspices. Dr. Douglass Hough- ton, the state geologist of Michigan, in the territory of which these Indian lands were included, made the first scientific examina- tion of the country in 1841, and his reports first drew public attention to its great re- sources in copper. His explorations were continued both under the state and general government until they were suddenly termi- nated with his life bv the unfortunate swamp- ing of his boat in the lake, near Eagle river, October 13, 1845. In 1844 adventurers from the eastern states began to pour into the country, and mining operations were commenced at various places near the shore, on Keweenaw Point. The companies tur strokes. The only other metal fiund with the cop- per is silver, and this does not occur as an alloy, but the two are as if welded together, and neither, when assayed, gives more than a trace of the other. It is evident from this that they cannot have been in a fused state in contact. The quantity of silver is small ; the largest piece ever found weighing a little more than S lbs. troy. This was met with at the mines near the mouth of Eagle river, where a considerable number of loose pieces, together with loose masses of copper, were obtained in e.xploring deep under the bed of the stream an ancient deposit of rounded boulders of sandstone and trap. The veins of even the trap rocks themselves of this lo- cality exhibited so much silver that in the early operations of the mines a very high value was set upon them on this account. But at none of the Lake Superior mines has the silver collected paid the proprietors for the loss it lias occasioned by distracting the attention of the miners, and leading them to seek for it with the purpose of appropriating it to their own use. Probably they have car- ried away much the greater part of this metal ; at least until the stamp mills were in operation. The principal mine of this district is the Cliff mine of the Pittsburg and Boston Com- pany, opened in 1 845, and steadily worked ever since. In 1858 the extent of the horizontal workings on the vein had amounted to 12,368 feet, besides 831 feet in cross-cuts. Five shafts had been sunk, one of which was 817 feet deep, 587 feet being below the adit level, and 230 feet being from this level to the summit of the ridge. The shaft of least depth was sunk 422 feet. The production of the mine from the year 1853 is exhibited in the following table: — Price per lb. Mineral Refined Yield deducting Value Tear. pnKiuced. copper, per cent, crjst of realized. lbs. Ihs. smelting. 1853, 2.268,182 1,071,288 47..38 cts. 27.32 $292,647 05 ISM, 2..3.32,614 I,3I5..30S 56.33 ■-4,38 320,783 01 1S55, 2,995.837 1,874,197 62.36 25 33 475,911 26 IRSfi, 3,291.8.39 2,220,934 67,48 24.12 5.3."i.843 67 1857, 8,363,.5.i7 2.:;63.KoO 70.28 20.44 497,870 47 1858, 8,183,085 2,331.964 71.00 21.03 47.5,321 89 1859, 2.139,632 1,415,007 64.35 20.50 290,097 97 1860 2.805,442 22,.374,6,sS .. .. '™u1a1eaTagr.": } "■^^O. -<"--« "' ^'"^^ The quantities of the different sorts for the year 1857 are as follows: — 941 masses 1.958.181 lbs. 869 bbls. of barrel work 613,731 " 1,020 '■ ofstainpings 791,645" Total 3,368,557 " The Portage lake mining district is from twenty to twenty-five miles west from the 54 MINING INDUSTRY OF THE UNITED STATES. Cliff mine on the same range of hills. This region is of more recent deTclopmcnt, tlie explorations having been attended with little success previous to 1854. The veins are here found productive in a gray variety of trap as well as the amygdaloidal, and instead of lying across the ridgos, follow the same course with them, and dip in general with the slope of the strata. 8ome of the larger veins consist in great part of cpidoto, and the copper in tliese is mucli loss dense than in the ijuartz veins, forming tangled masses which are rarely of any considerable size. On the eastern side of this lake are worked, among other mines, the Quincy, I'cwabic, and Franklin, and on the opposite side the Isle Koyale, Portage, and Columbian mines. The most successful of these has been the I'ewabic. Operations were com- menced here in 1855 upon an unimproved tract, requiring the construction of roads and buildings, clearing of land, etc. etc., all in- volving for several years a continue(i heavy outlay. The immediate and rapid produc- tion of the mine re(piired the construction of costly mills, without which a large propor- tion of the copper would be unavailable for the market. The first tliree years the as- sessments were $50,000, and the shipments of barrel and mass copper were in 1856 S^^VA tons; in 1857, 209JfP/j tons; in 1858, 402 tons; in 1859, SlSJJy^ tons. The proceeds from the sales up to this time paid off all the expenditures, and left besides a considerable surplus. The Franklin Com- pany, working the same lode upon the ad- joining location, commenced operations in July, 1857, and that year shipped 20 tons of copper, the next year 110 tons, and in 1859, 218 tons; the total amount in capital furnished bv assessments was 4(10,000. Tliese two mines have been the most rajiidly de- veloped of any of the Lake Superior mines. The Ontonagon river crosses the trap hills about forty miles south-west from Portage lake, and the mines worked in tlie Onton- agon district are scattered along the hills north-east from the river for a distance of nearly twenty miles. The outlet for the gieater number of them is by aroa;ement is more convenient for stopping a portion at a time as may be required for repairs or for collecting the very coarse gold under the stamps which cannot pass through the grating or the plates, perforated with many holes, that are usually employed in front of the stamps. GOLD. 69 upon these had been carried on to consider- able extent previous to 1836, principall}' in the counties of Spottsylvania, Orange, Louisa, Fluvanna, and Buckingham. Some of the mines produced at times very rich returns, but their yield was, for the most part, exceedingly irregular, the gold occurring in rich pockets or nests, very unequally scattered in the vein. The occasional richness of the veins caused the attention of wealthy capitalists in this country and in England to be directed to this region, and large outlays were made, in providing powerful engines and other suita- ble machinery for working the ores, and in opening the mines. But, although the oper- ations have been directed by the best mining skill, supported by abundant capital, the en- terprise, on the whole, has not proved suc- cessful, and since 1853 the business has greatly declined in importance. In North Carolina numerous quartz veins have been worked during the last 30 years, and operations arc still carried on with mod- erate success at several mines in Guilford, Davidson, Montgomery, Cabarrus, Itowan, and Mecklenburg counties. Deposit mines have been worked with great success, also, iu Burke, Rutherford, and McDowell coun- ties. At a single time, it is stated, there might have been seen, from one point of view in McDowell county, no less than 3,000 persons engaged in washing the deposits. In this district sluice-washing has recently been successfully introduced by Dr. Van Dyke, who is also engaged in the same proc- ess in Georgia. The most important group of mines is at Gold Hill, on the southern line of Kowan and Cabarrus counties. Mm- ing operations were begun here in 1843, and for 10 years the annual product averaged about §100,000; the last four years of this period more than one-third of all the gold coined at the Charlotte mint was from Gold Hill. In 1853 the property was purchased by a New York company, by which it has since been worked, but with greatly reduced profits, althou(;h the mines have been fur- nished with the most efficient machinery. These are the deepest gold mines in the At- lantic states, one of the shafts having now reached the depth of 680 feet. The ore is pyr- itous iron, containing gold in particles rarely visible, and probably chcniically combined with the iron and sulphur in the form of a double sulphuret. It is separated with difficul- ty, and very imperfectly, by the processes of crushing and amalgamating ; and the immense heaps of tailings collected below the mines, amounting probably to over two million bush- els, still retain quantities of gold worth from fifty cents to two dollars the bushel. In Da- vidson county amine was opened in 1839, which produced in the three succeeding years about $7,000 worth of gold, when the ore was proved to be more valuable for sil- ver than for gold. These metals were as- sociated with a variety of metallic ores, among which the sulphuret, carbonate, and phosphate of lead were especially abundant. I'^urnaces were constructed for reducing these, and separating the silver obtained with the lead. This is the only mine east of the Rocky Mountains which has furnished any considerable amount of silver to the mint. It is now known as the Washington mine. Although many gold mines have been worked in South Carolina, the only one of much note is the Dorn mine, in Abbeville district. In 1850 this mine, then quite new, produced gold to the value of §19,000, and in 1852 the production rose to $202,216, al- though the mine was provided with very im- perfect machinery and worked in a very rude manner. This large yield was, how- ever, of short duration, the gold occurring in great quantity only in streaks or pocket* upon a short portion of the vein. The Georgia gold mines, first worked in the north-east part of the state in 1829, were soon found to extend south-west into the country beyond the Chestatee river, which was then possessed by the Cherokee Indians. In 1830 the borders of this territory were overrun by a reckless set of adventurers, not- withstanding the attempts made, tii'st by a force of United States troops stationed for the protection of the Indians, and afterward by Georgia troops, when the state extended her laws in 1830 over the Cherokee country. On the removal of the Indians, their lands were distributed in 40 acre lots, by lottery, among the inhabitants of the state, and thus titles were obtained to the gold mines. The deposit mines yielded richly for a few years, and the whole product of gold for the first ten years of their working is supposed to have amounted to $16,000,000, a large por- tion of which never reached the United States mints, but was distributed in barter through- out the neighboring states and worked up in jewelry. From 1839 to 1849 the produc- tion did not probably exceed $4,000,000. A number of quartz veins were opened in Hab- ersham, Lumpkin, Cherokee, Carroll, Colum- 10 MINING INDUSTRY OF THE UNITED STATES. bia, and other counties, and considerable amounts of gold were obtained from these. They were, however, generally abandoned when the workings reached a depth at which machinery would be required for draining the mines. In Columbia county, about 20 miles from Augusta, the McCormack mine has been worked without interruption for about 20 years steadily, producing very fair profits. The gold is found in small particles in a lioney-combed quartz, wliich contains but little pyrites and some galena. Nearly all the gold was obtained within 70 feet of the surface. In Lumpkin county the gold is found in immense beds of decomposed micaceous and talcose slates, which, too poor to be worked by the slow process of crushing the whole material in mills and then washing away the earthy matter, will probably well repay the more tlxirough system of operations accord- ing to the California hydraulic process. Af- ter these beds had renuiiued neglected for many years. Dr. II. M. Van Dyke, who had gained experience in California, and already applied it in introducing the system into North California, found in Boston, Mass., capitalists who agreed to furnish the money required for securing the richest tracts in the vicinity of Dahlonega, and conveying to them the water for washing down the hills on the plan, which will be more particularl}' noticed in speaking of the California mines. In 1858 he commenced operations, which have since been actively conducted ; taking the water of the Yahoola river at a point about 13 miles above the spot where it will be first used, and conveying it by a canal or ditch over the more elevated portion of the country, crossing the valleys by means of sluices supported upon trestle-work, the height of which gradually increases with the descent of the streams, until at the crossing of the Yahoola near Dahlonega tlie liigh trestle now in construction is at the level of 24-0 feet above the bed of the river, with a span between the hills of 1,400 feet. Be- yond this crossing the canal is to be extended two miles further, to reach the rich deposits upon which the hose washing will be first applied. It is expected that the arrange- ments will bo completed early in 18iil, and that from the numerous localities coytrolled by the company, at which the water can be used to advantage, the proceeds will revive the reputation of the Georgia gold mines. Another association was formed in Bostop in 1857, called the Nacoochee Hydraulic Mining Company, for the purpose of apply- ing the same system to the high grounds in White county, recently a part of Haber- sham, in which are tlie mines of the Nacoo- chee valley and its vicinity, at one period highly productive, and where many deposits exist at so great an elevation, that no water has heretofore been brought to bear upon them. By damming the Nacoochee river, this company can carry water to these points ; and their arrangements are already nearly completed. In some experimental trials they I have, by the use of a current of water that would How through a six-inch pipe, obtained several hundred dollars per week with the labor of two miners. From one spot more than 1,500 dwts. were washed out in small 1 nuggets, several of about 1 00 dwts. each, and ■ one of 3s7 dwts. The value of these is $1 ' the dwt., and of the gold dust 97 cents. The auriferous belt of rocks consists of al- I ternating beds of micaceous, hornblende, and talcose slates and gneiss, which stand nearly vertically, and contain between their layers bands of quartz. The gold is found in the quartz and in the auriferous pyrites accom- panying it, and to some extent in the slates also. Detached or " free" gold is also met with, derived, no doubt, from pyrites which has decomposed and disappeared. From the general disintegr.ation of the edges of these strata, gold has been distributed in the deposits around. From Georgia, the gold-bearing rocks are traced into eastern Tennessee, where tliey have been worked along the range of the Coweta and Smoky Mountains; and from the south side of the Blue Ridge, in Georgia, they have proved productive in a south-west direction, through Carroll county, into Ala- bama; but the formation is soon lost in the last-named state. The gold regions along both slopes of the Rocky Mountains are, however, the most re- markable yet discovered on this continent. In CoLOR.\DO, "the whole range of moun- tains seems crowded with veins of rich mineral ore. They run into and through the hill sides like the bars of a gridiron — every hundred feet, every fiftj' feet, every twenty feet." The first and largest develop- ment of these mmos lies along and up the Clear Creek and centres around its sources. The principal mining villages of this section are Central City, Black Hawk and Nevada. Another centre of productive mining interests 71 is ill the South Piirk. The gold in Colorado is combined witli sul|iliiiv and forms a sort of pyrites. Tliis renders its extraction more dirtiiuilt; but processes have lately been de- vised which, without increasing materially the expense, will raise the prodnction of gold per cord of ore to three or five-fold what it has hitherto been. There are also large deposits of gold in New Mexico and Utah, which are not yet developed to any con- siderable extent. Idaho and Montana are also immensely rich in gold mines and placers. The Boise Basin, in Idaho, has yielded, and still yields to the placer miner in many parts a fair re- turn for his labor, and possesses, beside, many valuablo gold-bearing quartz leads. The South Boise has also many valuable leads. The Owyhee mines, sixty miles south of Boise City. They are almost entirely silver-producing, though some gold is ex- tracted from the silver. In Montana, the placer diggings are yet paying largely, and the quartz leads are richer in gold than in any section yet discovered; and the two localities which have been thus far princi- pally worked, Alder Gulch, and the vicinity of Helena, about one hundred and fifty miles apart, are yielding both gold and sil- ver in gi-eat profusion. Still another region rich in gold, richer perhaps than either of the others, though as yet developed with difficulty, on account of the hostile and treacherous Indians who roam over it, is the Territory of Arizona. Its gulches and canons abound in the precious metal, and it cannot be long before they yield in profusion their long liidden wealth. The completion of the Pacific railroad will soon make this wealth available. The most important gold region of the United States and of the world is that of California. Its development has not only largely multiplied the previous gold produc- tion of the globe, but it has been the means of rapidly bringing into the use of civilized nations large territories of productive lands, which before were an unprofitable wilderness, founding new states, enlarging the commerce of the world, and bringing into closer inter- course nations which before were the most "widely separated. At the period when the wealth of the gold mines of California began to be realized, the annual production of gold throughiuit the world had gradually fallen to about $20,000,000, and more than half of this was furnished by Russia alone. In 1853, only five years later, California produced an amount estimated at §70,000,000, and the total production, through the supplies, nearly as large, funiislicd at the same time by Australia, had increased to almost double this amount. Little was known of California previous to the discovery of gold at Sutter's mill, on the American fork of the Sacramento, in February, 1848; yet its being a country containing gold was made known by Ilak- luyt in his account of Drake's ex[)cd;tion of 1577-9, and by Cavello, a Jesuit priest of San Jose, Bay of Francisco, who published a work on the country in Spain in 1(590. Re- ports from later travellers confirmed these statements at various times, and in Hunfs Merchants^ Mar/azine for April, 1 847, a report is presented by Mr. Sloat, which speaks in very decided terras of the richness of the gold placers of the country, as noticed by him during his observations of the two pre- ceding years. The Rev. C. S. Lyman, in a letter written to the editor of the American Journal of Science from San Jose, in March 1848, notices the discovery of the preceding month as very promising. In August of that year it was reported that four thousand men were engaged in working the deposits on the American fork, and were taking out from 830,000 to $40,000 a day. This com- prised a large portion of the population of California. San Francisco was almost de- serted, and people were pouring in from distant regions. The next year the emigra- tion commenced in the LTnited States, both by sea around Cape Horn, and across the plains and Rocky Mountains in large parties. By the close of the year 1849 the number of persons engaged in mining was estimated at from 40,000 to 50,000 Americans, and about 5,000 foreigners: the total product of gold at about $40,000,000. The mining district was traced up the valley of the Sacramento toward the north, and the con- tinuation of the .same formations up that of the San Joaquin in the opposite direction was also beginning to be understood. Along the vallej's of the streams, which flowed into these rivers from the Sierra Nevada range to the east, gold was almost everywhere found, and upon the hills and elevated plains it was met with beneath the sands and clays which covered tlie surface to the depth of fifteen to thirty feet or more ; all the materials, earthy and metallic, appearing either to have been derived from the superficial disintegration of the slaty formations, or to have been depos- V2 MINING INDUSTRY OF THE UNITED STATES. ited by ancient rivers, whlcli have since been diverted in other directions. Deposits of this character were called dry diggings, and, except in the wet season, were worked to great disadvantage for the want of water to separate the earthy matters from the gold. In the bottoms of the streams the deposits contained much coarse gold, derived from the wearing down of the slate formations through which they had made their way in their rapid descent from the Sierra Nevada mountains. By the excavation of the vast gulches or ravines of these streams, some of which presented precipitous walls of about 3,000 feet in height, au immense amount of gold must have been rem<)\cd from its orig- inal beds, which, as tlie lighter earthy mat- ters were swept down the rivers, remained behind, forming the riches of the auriferous deposits. The country of this peculiar character ■w^s found to extend along the western slopes of the Sierra Nevada for 400 or 500 miles, and the gold-bearing slates to spread over a width of from forty to sixty miles. Whether or no the natural processes by which the gold had been collected from its original beds suggested to the California miner an improved method of washing the auriferous formations upon a gigantic scale, it was soon found that the richness of the de- posits would justify, especially in the dry diggings, large outlays in conveying water from great distances by canals or ditches, and applying this, either under the pressure of a great head, to tear up the material from its bed and wash away the earthy portions, or to wash the auriferous gravels as these were carried to the water sluices and thrown into them for this purpose. On this plan hydraulic operations were soon laid out of extraordinary extent. Currents were di- verted well up the slope of the Sierra Nevada mountains, and conveyed in canals along the sides of the hills, and in sluices, supported upon trestle-work, from one hill to another, sometimes at a height of more than 200 feet above the bottoms. On the hills where the water was required for " hose washing," it was taken fmm the canal or sluice in a large and strong canvas liose, to the lower end of which a nozzle, like that of a fire engine, was attached. The least head for efficient ser- vice was about 60 feet, and a head of 100 feet was used where it could be liad and the hose would bear it. Large hose and nozzles proved much more efficient than several smaller ones of equal or even greater capac- ity. As estimated by Mr. Wm. P. Blake, with a pipe of an inch and a half or two inches aperture, and a pressure of 90 feet head, a boy can excavate and wash as much aurif- erous earth as 1 or 1 5 men by the ordinary methods. In suitable places, where the waste water can flow rapidly away though the sluices made for its channel and for catching tlie gold, the jet of water is directed against the side of a hill, which it rapidly excavates, sweeping oft' the earthy portions, undermin- ing the trees, and rolling down the loose stones, and, where the ground is fiivorable for the opei'ation, cutting every thing awa}', it may be to a depth of 100 feet from the top to the bottom of the excavation, leaving behind barren acres of loose stone in un- sightly piles — a perfect picture of desola- tion. At the close of the year 1858 it was estimated that the artificial water-courses al- ready constructed for mining purposes in California amounted to 5,726 miles in length, and their cost to $13, 575, 400 ; and besides these there were branches not enumerated, and others in construction, to the extent of about 1,000 miles more. Among the prin- cipal of these canals are the Columbia and Stanislaus, in Tuolumne count}', which is 80 miles long, and cost $600,(i00 ; the Butte, in Amador county, 50 miles long, cost $400,000 ; that of the Union Water Com- pany, in Calaveras county, 78 miles long, cost $320,000; and that of tlie Tuolumne Hydraulic Companj', 60 miles long, cost $300,000. Notwithstanding the cost of tliese enterprises, they have proved in gen- eral highly profitable, paying, after deducting the expenses of keeping them up, from one to more than five per cent, a montli. The water is sold to the miners by the canal companies at so much per inch of the discharge — this being from a horizontal aperture, one inch high, at the bottom of a box in which the water is kept six inches deep. The length of the aperture is i^gulated by a slide. The price has fallen ffom $3.00 an inch per day in 1851, to 50 cents in 1854, and is now still less. Sluice-washing, which is a necessary part, of the hydraulic or hose process, is also carried on independently of it, and by a method which was first adopted in Califor- nia. Channels are made sometimes upon the surface of the slaty beds in place, the ragged edges of which are very favorable for catching the gold, or sometimes of boards, GOLD. 73 in the form of an open trough, a foot or 15 inches in width, and 8 or ten inches deep, which are extended to several hundred feet in length. These are set at a suitable slope, usually about one in twelve, and " riffle " bars are laid across to obstruct the flow of the heavy metallic particles which sweep along the bottom, while the muddy portions and stones are carried over with a flow of the water, and discharged at the lower end. Fresh gravel is continually shoveled into the sluices, and once a day, or oftener, these are cleaned up to collect the gold from the riffles and pools, which are sometimes used at the head of one joitit of the sluice to re- ceive the discharge from the next one above. Where the descent is rapid enough to keep the pool " in a boil," a considerable portion of the gold may be caught in it, especially if mercury be introduced. In 1851, attention began to be turned to the quartz veins, or "ledges," as they wore called, and numerous companies were soon established in the United States and in Eng- land for carrying on regular mining opera- tions upon these. Within five years after, many deep shafts had been sunk upon veins in different parts of the country, and mills wire in operation, furnished with the most efficient machinery for crushing and wash- ing the ore. The imcerlain supply of wa- ter, and the great expense attending the pro- curing it by canals from a distance, operated for a time strongly against the success of these works. Upon the Mariposa estate, once the property of Gen. J. C. Fremont, one of the earliest and most extensive ex- periments in quartz mining was made. The quartz veins on that estate were not so rich as some which have since been discovered elsewhere, yielding by the old ISIexican pro- cess with the arasteus only eight or nine dollars to the ton. By a new and improved method, known as the " Eureka Process," the jiekl was increased to forty or fifty dol- lars jier ton, and from the Princeton mine alone over three million diillars were taken out before 18G7. Had this noble property been wisely or well managed, it would have made the General the wealthiest of Ameri- can millionaires ; but, unfortunatel}', prose- cuting his great schemes too rapidly, he fell into the hands of men who stripped him of his grand estate and squandered its profits. But whatever may be the ultimate fiite of this great estate, the success of quartz mining in California is assured; there were in the State, in the spring of 1868, 472 quartz mills carrying a total of 5,120 stamps, and nearly all were doing a profitable business. There is, of course, a great difference in the yield of different veins ; some after a period of great productiveness, coming upon a con- siderable stretch of barren quartz, where the yield is insufficient to pay expenses, and then passing on to a gangue richer and more pro- ductive than the portion of the vein first opened. Others will have the precious metal in " chutes " or " chimneys " scattered here and there along the course of the vein, which are enormously productive while the intervening portions are entirely barren. Others still will yield a steady and very uni- form percentage, not large but fair. In general it may be said that quartz mining yields a more certain though more moderate success than any other kind of gold mining. The total production of the mines of Cali- fornia, from the commencement of extensive mining there to the year 18711, was as fol- lows, according to the best authorities : 1848 $10,000,000 1849 40,000.000 1850, 50,000,000 1851, 55,000,000 1852 60,000,000 18.53 65,000,000 1854, 60,000,000 1855, 55,000,000 1856, 55,000,0(10 1857 55, ,100,000 1858 50,000,000 1859, 50.000,000 1860 £45.000,000 1861 40,000,000 1862 34,700,("00 1863, 30,000,000 1864 26,600,000 1865 28,500,000 1866, 26,500,000 1867, 25,000,000 1868 28,000,000 18C9, 27,800,000 1870, 28,500,000 ¥945,600,000 The deposits of gold at the mint, and its branches, for the year ending June 30, 1870, were $29,48o,'J(53.45. Of silver, for the same time, $3,504,942.51. Total deposits $32,990,210.96. The coinage for the same period was — gold coin, number of pieces, 1,156,087 ; val- ue, $22,257,312.50; unparted and fine gold bars, $87,846,052.25 ; silver coin, pieces, 4.649,398 ; value, $1,767,253.50 ; silver bars, $9112,800.66 ; nickel, copper, and bronze pieces, 18,154,000; value. $611,445; total number of pieces struck, 23,961,'292 ; total value of coinage, $33,384,863.91. New localities are tested by trying the earth in different places, by washing it in an iron pan or upon a shovel, an experienced hand readily throwing the heavy particles by themselves, while the lighter are allowed to flow away. This method is one of the 74 MINIKQ INDUSTRY OF THE UNITED STATES means in use for collecting gold upon a small scale, and the Mexicans of the gold regions, by long practice, arc particularly expert in it. If a vein is to be tested, the quartz is finely crushed, and the powder is then washed in the same manner. Gold may be thus brought to view when none was visible in the stones, however closely ex- amined, liy placing a little mercury or quicksilver in the pan, the gold will be more perfectly secured, as, by coming in contact with each other, these metals instantly unite to f )riu a heavy amalgam, and the mercury thus holds the linest particles of gold so that they cannot escape. The mixture, separated from the sand, is squeezed in a piece of thick linen or deerskin, through which the excess of mercury escapes, leaving the amalgam. This may then be heated on a shovel, when the mercury goes oft" in vapor, and the gold is left in its original-shaped particles, coher- ing together in a cake. If the quantity of amalgam is considerable, it is distilled in a retort, and the mercury is condensed to be used again. This amalgamation fails entirely if the slightest quantity of any greasy sub- stance is present, as a film of the gi'case coats every portion of the mercury, and eft'ectually prevents its contact with the gold. These processes contain the principles of nearly all the methods in use for separating gold. A great variety of machines liave been based upon them, the sinqslost of which have proved the most valuable. The Burke rocker has always been a favorite machine in the south- ern states, and has been largely used in Cali- fornia by small companies of miners, and in localities where operations were not carried Nn\ .'ij'^V* >^-». BUBKE ROCKIB. on upon a very extensive scale. It is a cradle- shaped trough, about six feet long, set on two rockers, the upper end a few inches higher than the lower, and placed so as to receive at its head a current of water from the end of a leading trough above. This falls upon a perforated iron plate, set as a shelf in the machine, and u])on this the auriferous gravel is thrown. The finer par- ticles fall through as the rocker is kept in motion by hand, and the coarse gravel rolls down to the lower end, and falls off upon the ground. Across the bottom of the rocker are placed, at intervals of G or 8 inches, low bars or partitions which catch the heavy sands, and prevent their being washed out of the lower end with the water and mud. This lower portion is sometimes arranged as a drijwer, which can be secured by a lock, so that the gold which falls into it is safe against robbery. The drawer is called the " riftle box." Some rockers are mere open troughs without a shelf. The " tom" is often preferred to the rocker, which it resembles, except in its being a trough without rockers, on the plan of the sluices alreadv described. I'oth it and the rocker are of convenient size for moving about from one place to another, as the working of the deposit advances. Vein mining requires more efficient ma- chinery, and stamping mills are constructed as near as may be to the mines, for reducing the stony materials to powder, and the sands from the stamps are passed through a variety of machines designed to catch the gold. Stamps arc solid blocks of the heaviest cast iron attached to the end of a wooden or iron rod called the leg, to which the lifting cam is apiilied for raising them. They common- ly weigh about 300 llis. each, though in California they are made of twice and even three times this weight. Several of tliera are set ton-ether in a frame side by side, and are lifted in succession by the cams upon a horizontal shaft, which revolves in front of them. The bed in which they stand, and into which the ore to be crushed is thrown, is sometimes a massive anvil, hollow in the top, firmly imbedded in a heavy stick of timber, or is formed of stones, beaten by the stanqis themselves into a solisure caused by the height of the column carries them down upon tie mercurial sur- face, and, by reason of this p-issure and the centrifugal action of tiie re\olving disk, they gradually work outward between this sur- face and the amalgamated surface above, be- ing pressed an J rubbed between them till they escape round the circumference of the disk, and flow over the edge of the tub. Hot water, as in all other modes of amalga- mating, is preferable to cold. l?y this pro- cess all free gold, however fine the particles, must come in contact with the amalgamated surface, and be taken up by the mercury. It perfectly separates the gold that in other machrnes floats off in the fine slime. In gold ores, especially those of sulphurous character, much of the gold is so fine that it remains suspended a long time in water, and is en- tirely lost. Tilt! important feature of this invention is the use of an inferior amalga- mated surface, against which these floating particles are pressed. The pressure is se- cured by any desired depth of the mercury, but in practice less than an inch above the lower edge of the plate is found to be suffi- cient. The efficiency of the machine was fully tested in November, 1860, at the Gold Hill mine, in North Carolina, where good results were obtained with it. In the same month it was tried at the U. S. assay office, N. y ., upon the tailings of the sweeps from which all the gold had been extracted that could be removed by the amalgamating ma- chines in use, and from these it readily sepa- rated the remaining portion. As remarked in the mention made of the Gold Hill mines, when gold is associated with iron and copper pyrites it is held verj' tenaciously, as if combined itself with the suli)hur, like the other metals. However finely such ores are pulverized, every micro- scopic particle of pyrites appears to retain a portion of gold, .and prevent its uniting with the mercury. This portion of the gold, con- sequently, escapes in the tailings ; and if these are kept in refuse heaps, exposed to the weather, the pyrites slowly decompose, and more gold is continually set free. Thus it is the heaps may be washed over with profit tor many successive years. Roasting of the ores is recommended by high authori- ties for freeing the gold at once, the effect of it being to break up the sulphurets, caus- ing the sulphur to escape in vapor, and tlie iron to crumble down in the state of an oxide, or an ochreous powder, from which the gold is readily separated. This is objected to by others, who assert that it involves a great loss of gold, which is volatilized or carried off mechanically in the sul])hur fumes. Two other methods adopted, since 1857, for the 'immmwr/zfyy /«)| GOLD. 77 leiluction of those ores containing large pro- portions of the sulphurets of iron and cop- per, deserve notice — viz. .the " Sodium Amal- gamating Process," and the " Plattner Chlorination Process." The use of the Sodium in mechanical com- bination -with mercury to oxidize and thus remove more readih' the impurities, sulphur, arsenic, and antimon}', which interfere with the reduction or extraction of gold from the quartz, was suggested about 1861, and has been made the subject of two jjatents, one by Dr. Chas. Wurtz in New York, in 18G4, the other by Mr. Crookes, of London, in 186.T. It has proved very successful in Col- orado, Nova Scotia, and California, in those mines where the gold was so difficult of ex- traction, on account of the presence of a large percentage of refractory p3'rites. The yield of gold from these ores has been in- creased from 20 to 30 per cent. The sodium is however as yet so costly, that it is only the richer ores in which it pays, commercial- ly, to use it. Amalgams are now put up according to the formula; of the patentees, containing the requisite quantity of sodium in combination with other metallic com- pounds. These are to be used, according to the amount of concentration, with from 20 to 150 times their weight of mercury. The Amalgam varies from SI. 2.5 to !?1.75 per pound. Recently it has been announc- ed that cyanide of potassium was to be preferred for this purpose to sodium — while it is much cheaper. The Plattner chlorination j)rocess requires as a prelimin- ary a double roasting of the ores, the fii-st time at a low heat to oxidize the ore and burn out, as far as possible, the sulphurets and other impurities, and the second time, at a higher heat, to decompose the metallic salts f )rmed at the first roasting. If sulphates of lime and magnesia are jiresent they are removed by the addition of some common salt to the roasting mass. When the roast- ing is completed the ore is discharged from the furna 'e and allowed to cool, and then being damped is sifted into a large vat, lined with bitumen, and having a false bottom on which rests a filter composed of broken quartz and sand. The vat is provided with a close-fitting cover which can be luted on and made air-tight. The chlorine is then generated in a leaden vessel by means of sulphuric acid, and conducted into the bot- tom of the vat through a leaden jiipe. As it passes up through the ore more ore is sifted in and the vat is gradually thoroughly charged with the gas, when the cover, having been luted on and all escape prevented, and the whole allowed to stand for twelve or eighteen hours the gold is completely chlori- dized. Water is then introduced which ab- sorbs the chlorine and dissolves the chloride of gold, and a stream of w-ater is permitted to run in at the top of the vat till the lixiviation is coinplete. The residue in the vat is then thrown away, and the solution of chloride of gold goes to the precipitating vat when a solution of proto-sulphate of iron is added to it, and it is permitted to stand for eight or ten hours. The water is then carefully drawn oft', the precipitated gold collected upon a paper filter, dried, melted and run into bars. This gold will be, if the process is carefully conducted, 999 fine, or almost absolutely pure gold. In the " branch mining " of the southern states, deposits worked by the rocker are regarded as profitable which pay a penny- weight or nearly one dollar per day to the hand employed. The great Iseds of decom- posed slates of Georgia can be worked to profit when they yield from four to five cents worth of gold to the bushel of stuff, or about 100 lbs. weight; but the mill for crushing and washing it must then be close at hand. The proportion of the gold, in this case, is less than 2 parts in 1,000,000. The hard quartz ores must contain nearly or quite 20 cents worth of gold in the bushel, especially if they are pyritiferous. Although the gold is obtained in a metal- lic state, it difters very much in value in dif- ferent localities. Deposit gold from the vicinity of Dahlonega, in Georgia, is worth 93 cents the pennyweight ; that of Hart county, in the same state, 98 cents ; of Car- roll county, Georgia, and Chesterfield dis- trict. South Carolina, $1.02 ; of Union coun- ty, Georgia, or the Tennessee line, 72 cents ; Charlotte, North Carolina $1.00; and that of Burke county, North Carolina, only 50 cents. The average fineness of California gold is found to be from 875 to 885 parts in 1,000, which is very near that of our gold coin, viz, 900 in 1,000. The native gold from Australia has from 960 to 966 parts La 1,000 pure gold, and some from the Chau- diere, in Canada, 877.3 pure gold, and 122.3 silver ; another specimen 892.4, silver 107.6. 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The most important use of gold is as a medium of exchange. For this purpose it is converted into coin at the mints, and into bars or bullion at the government assay of- fice. In this form a large porticjn of the re- ceipts from California is immediately ex- ported from New York to make up the bal- ance of foreign trade. Each bar is stamped with marks, representing its fineness and weight, and may continue to be thus used, or when received at foreign mints, is convert- ed into coin. A large amount of gold is consumed in jewelry, trinkets, watches, and plate, and still more in the form of gold- leaf. This last being worn out in the using, or being distributed in too small quantities together to pay for recovering it, is altogether lost to the community, after the articles have served the purpose intended. This loss in the time of James I. was considered so serious, that a special act was passed, re- stricting the use of gold and silver-leaf, ex- cept for specified objects, which, singular!}' enough, were chiefly for military accoutre- ments. Gold employed in the recently in- vented process of electrotyping, in which large quantities are consumed, is similarly lost in the using. Besides the use of gold-leaf in gilding, it is employed quite largely by dentists as the best material for filHng teeth. They also tise much gold plate and wire for securing the artificial sets in the mouth. In book- binding, gold is consumed to considerable extent for lettering and ornamenting the backs of the books. The manufacture of gold-leaf is carried on in various places, both in the cities and country. It is a simple process, known in ancient times, but only of late years carried to a high degree of per- fection. The ingots, moulded for the pur- pose, and annealed in hot ashes, are rolled between rollers of polished steel, until the sheet is reduced from its original thickness of half an inch to a little more than ^i^ of an inch, an ounce weight making a strip ten feet long and H inches wide. This is an- nealed and cut into pieces an inch square, each weighing about six grains. A pile is then made of 1 50 of these pieces, alteniiiting with leaves of fine calf-skin vellum, each one of which is four inches square, and a number of extra leaves of the vellum are .added at the top and bottom of the pile. The heap, called a tool or kutch, is slipped into a parchment case open at the two ends, and this into a similar one, so that each side of the pack is protected by one of the case. It is placed upon a block of marble, and then beaten with a hammer weighing sixteen pounds, and furnished with a convex face, the effect of which is to cause the gold to spread more rapidly. The workman wields this with great dexterity, shifting it from one hand to the other, without interfering with the regularity of the blow. The pack is oc- casionally turned over, and is bent and rolled in the hands to cause the gold to extend freely between the leaves, as it is expanded. The gold-leaves are also interchanged to ex- pose them all equally to the beating. When they have attained the full size of the vellum, which is done in aliout twenty minutes, they are taken apart, and cut each one into four pieces, making 600 of the original 150. These are packed in gold-beater's skin, and the pack is beaten as before, but with a lighter hammer, until they are extended again to sixteen square inches. This oc- cupies about two hours. The gold-leaves are then taken out, and spread singly upon a leather cushion, where they are cut into four squares by two sharp edges of cane, ar- ranged in the form of a cross. To any other kind of a knife the gold would adhere. These leaves are again packed, 800 together, in the finest kind of gold-beater's skin, and expanded till each leaf is from 3 to 3i inches square. The aggregate surface is about 192 times larger than that of the orig- inal sheet, and the thickness is reduced to .about the 75 ^V o o^ '^^ ^^ inch. The beating is sometimes carried further than this, es- pecially by the French, so that an ounce of gold is extended over 160 square feet, and its thickness is reduced to 5 34V n "^ <"i inch, or even to ^jjViTo- When the pack is open- ed, the leaves are carefully lifted by a pair of wooden pliers, spread upon a leather cushion by the aid of the breath, and cut into four squ.ares of about 3i inches each, which are immediately transferred one by one between the leaves of a little book of smooth paper, which are prevented from ad- hering to the gold-leaves by an application of red ochro or red ch.alk. Twenty-five leaves are put into each book, and when fill- ed, it is pressed hard, and all projecting edges of the gold are wiped away with a bit of linen. The books are then put up in pack- iiges of a dozen together for sale. An imitation gold-leaf, called Dutch gold- leaf, is used to some extent. It is prepared from sheets of brass, which are gilded, and LEAD. 81 beaten down in the manner already described. When new it appears like genuine gold- leaf, but soon becomes tarnished in use. Party gold-leaf is formed of leaves of gold and of silver, laid together and made to unite by beating and hammering. It is then beaten down like gold-leaf. The gold-beater's skin used in this manu- facture is a peculiar preparation made from the .caecum of the ox. The membrane is doubled together, the two mucous surfaces face to face, in which state they unite firmly. It is then treated with preparations of alum, isinglass, whites of eggs, etc., sometimes with creosote, and after being beaten be- tween folds of paper to expel the grease, is pressed and dried. In this way leaves are obtained 5i inches square, of which moulds are made up, containing each 850 leaves. After being used for a considerable time, the leaves become dry and stiff, so that the gold cannot spread freely between them. To remed}' this, they are moistened with wine or with vinegar and water, laid between parchment, and thoroughly beaten. They are then dusted over with calcined selenitc or gypsum, reduced to a line powder. The vellum, which is used before the gold-beater's skin, is selected from the finest varieties, and this, too, after being well washed and dried under a press, is brushed over with pulverized gypsum. In the great exhibition at London in 1851, machines were exhibited from the United States, and also from Paris, which were de- signed for gold-be.ating, and it was supposed they would take the place of the hand proc- ess. They have been put into operation at Hartford, in Connecticut, but after being tried, they have been laid aside for the old method. CHAPTER IV. LEAD. Lead is met with in a great number of combinations, and has also been found in small quantity, at a few localities in Europe, in a native state. The common ore, from which nearly all the lead of commerce is ob- tained, is the sulphuret, called galena, a com- bination of 86.55 per cent, of lead and 13.45 of sulphur. It is a steel gray mineral of bril- liant metallic lustre when freshly broken, and is often obtained in large cubical crystals : the fragments of these are all in cubical forms. The ore is also sometimes in masses of gran- ular structure. Very frequently galena con- tains silver in the form of sulphuret of that metal, and gold, too, has often been detected in it. The quantity of silver is estimated by the number of ounces to the ton, and this may amount to lOU or 200, or even more; but when lead contains three ounces of silver to the ton this may be profitably separated. Ores of this ch.araoter are known as argentif- erous galena ; if the silver is more valuable than the lead they are more properly called silver ores. In Mexico and Germany such are worked, but not in the United States. Galena is easily melted, and in contact with charcoal the sulphur is expelled and the lead obtained. The ore is found in veins in rocks of difierent geological formations, as in the metamorphic rocks of New England, the lower Silurian rocks of Iowa, Wisconsin, and Missouri, in limestones and sandstones of later age in New York and the middle states, belonging to higher groups of the Ap- palachian system of rocks, and in the new red sandstone of Pennsylvania at its contact with the gneiss. Carbonate of lead is another ore often as- soci.ated with galena, though usually in small quantit}'. It is of light color, whitish or grayish, commonly crystallized, .and in an im- pure form is sometimes obtained in an earthy powder. At St. Lawrence county, New York, barge quantities of it have been col- lected for smelting, and were called lead ashes. The ore may escape notice from its unmetallic appearance, and at the Missouri mines large quantities were formerly thrown aside as worthless. It cont.ains 77.5 per cent, of Ic.id combined with 6 per cent, of oxygen, and this compound with 10.5 per cent, of carbonic acid. Beautiful crystals of the ore, some transparent, have been ob- tained at the mines on the Schuylkill, near Phoenixville, Pennsylvania ; the Washington mine, Davidson county, North Carolina ; and Mine La Motte, Missouri. Another ore, the phosphate or pyromor- phite, has been known only as a rare min- eral until it was produced at the Phcenixville mines so abundantly as to constitute much the larger portion of the ores smelted. It is obtained in masses of small crystals of a green color, and sometimes of other shades, as yellow, orange, brown, etc., derived from the minute portions of chrome in combination. With these a variety of other compounds of 8S MIKiyO IXDCSTRT OF THK rSITKD STATES. lead are mixed, togrether with phosphate of lime and fluoride of caleium. so that the pcr- centaije of the metal is variable. The com- pounds of lead met with at these mines are the sulphurot, sulphate, carbonate, phosphate, arseniate, niolybdate, chromate, chromo-mol- ybdate, arsenio-phosphate, and antimonial ai^entiferous. Besides all these, a single vein contained native silver, native copper, and native sulphur, three compounds of zinc, four of copper, f.iur of iron, black oxide of mansrane^c, sulphate of barvtes, and quartz. The eastern portion of the United States is supplied with lead almost exclusively from Spain and Great Britain, but the western states are furnished with this metal from mine-s in Iowa, Wisconsin, and Missouri. The lead veins of the eastern and southern states are of little importance. In Maine the ores are found in Cobscook B.iv, near Lubec and Eastport, in limestone rocks near dikes of trap. A mine was opened in 1 S3i}, and a drift was carried in about 1 55 feet at the base of a rockv cliff on the course of the vein ; it was then abandoned, but operations have recentlv been recommenced. In New Hampshire arijentiferous galena is found in numerous places, but always in too small quantitv to pav the expenses of extraction. At Shelbnme a l:\rje quartz vein was worked from 1S46 to 1S49, and three shafts were sunk, one of them 275 feet in depth. The ore was found in bunches and narrow streaks, but in small quantity. Some of it was smelted on the spot, and five tons were shipped to Encland. which sold for £16 per ton. The richest yielded S-4 ounces of silver to the ton. Another vein of argentiferous ga- lena has been partiallv explored at Eaton, and this is most likely of any to prove valuable. Massachusetts, also, contains a number of lead veins, none of which have proved prof- itable., thouirh some of them have been ■worked to considerable extent The most noted are those of Southampton and East- hampton. Operations were commenced at the former place in 1765 upon a great lode of quartz containing galena, blende, copper pvrites, and sulphate of barytes. It is in a coarse granitic rock near its contact with the red sandstone of the Connecticut valley. About the vear ISIO an adit level was boldly laid out to be driven in from 1,100 to 1.200 feet, t-o intersect the vein at 140 feet below the surface, A single miner is said to have worked at it tiU his death, in ISiS, Then it had reached the length of 900 feet. At different times this adit has been pushed on, and when last abandoned, in 1 854, it was supposed to be within a few feet of the vein. The rock was so excessively hard that the cost of driving the adit was about 8-5 per foot. Lead veins are found in Whately, Hat- field, and other towns in Hampshire county. In Connecticut, also, several veins have been worked to some extent. That at Mid- dletown, referred to in the introductory re- marks as one of the earliest opened mines in the United States, is the most noticeable. It is unknown when this mine was first worked. In 1S52 operations were renewed upon it, and a shaft sunk 120 feet below the old workings. The vein is among strata of a silicious slate, in some places quite rich, but on the whole it has proved too poor to work. The ore contained silver to the value of from $25 to $75 to the ton of lead. Lead mines have been opened in Xew York, in Dutchess, Columbia, "Washington, Eensselaer, L Ister. and St, LawTence coun- ties. In the first four of these the ore is found in veins near the junction of the meta- morphic slates and limestones. The Ancram or Livingston mine, in Columbia countv, has been worked at different times at consider- able expense, but with no returns. A mine in i Xortheast, Dutchess countv, was first opened } by some German miners in 1740, and ore from it was exported. The Committee of Public Safety. durin tons in 1856, and 96,206 tons in 1857, thus considerably exceeding one-half of the whole production of the globe in this metal, which in 1854 was rated at about 133,000 tons. At that time the production of Spain was rated at 30,000 tons, and of the United States at 15,000 tons. Average Invoice Pig, bar, and Invoice value rate of White and value of sSeet lead of yearly duty per red lead yearly irn imported. iuiponatioDS. 100 lbs. imported portations lbs. lbs. 5,333,588 $124,311 $3.00 657,781 $30,791 2,282,068 60,660 3.00 625,069 36,049 4,997,293 168,811 2.77 1,024,663 57,572 1,006,472 35,663 2.77 832,215 50.225 919,087 35,283 2.55 908,105 62,237 335.772 13,871 2.57 599,980 47,316 165.844 6,573 2.34 522,681 38,683 528,922 18,631 2.31 720,408 50,;M)5 519,343 18,111 2.08 643,418 41,043 62,246 2,605 2.07 532,122 31,617 4,689 155 3.00 479,738 28,747 290 3 3.00 3.00 93,166 5,600 iV.eoD '458 3.00 231,171 14,"7'44 214 6 3.00 215,434 15,685 224,905 6,288 0.56 298,387 15,228 2,684,700 85,387 0.64 318,781 19,703 36,997,751 1,182,597 0.'64 853,463 43,756 43,470,210 1,517,603 0.70 1,105,852 52,631 37,544,588 1,283,331 0.70 842,521 43,365 43,174,447 1,618,058 0.70 1,224,068 69,058 47,714,140 2,095,039 0.90 1,865,893 102,812 56,745,247 2,556,523 0.90 2,319,099 134,855 55,294,256 2,528,014 0.91 3,548,409 174,125 47,947.698 2.305,768 0.72 1,793,377 113,075 41,230,019 1,972,243 0.72 1,785,851 109,426 64.000,000 2,617,770 0.72 61,936 3,871 45,896,700 1,835,868 0.72 177,744 11,109 45,654,100 1,826,164 0.72 200,848 12,5.53 34,611,575 1,384,463 0.78 307,824 19,239 39,437,566 2,816,969 1.11 1,004,624 71,766 20.897,109 2,247,001 1.32 1,390,052 149,468 7,969,0S0 1,193,362 1.75 1,662,516 249,385 40.223,888 2,513,993 2.25 2,035,395 135,693 41,06),175 2,737,745 0.95 ■ 1,464,972 122,081 41,437,520 2,762,520 1.00 1,399,512 116,626 56,062,128 3,503,883 0.97 336,732 28,061 58,310,464 3,644,404 0.96 367,008 30,584 pie methods. The earlier operations were limited to smelting the ores in log furnaces. Upon a layer of logs placed in an inclosure of logs or stones piled up, split wood was set on end and covered with the ore, and over this small wood again. The pile was fired through an opening in front. The combustion of the small wood removed from the ore a portion of the sulphur, and the re. duction was completed by the greater heat arising from the burning of the logs. The lead run down to the bottom and out in front into a basin, whence it was ladled into S9 MINING tNnrSTUY OF THS rNITKD STATES. till' inouMs. Tlio loss of luotal was of rourso voi'v l;ir^o ; but ;i portion \v;»s i\>oov- oroJ l>v tro.itiiisi the ivsiiluo ii\ what >v;is o.illoil .-in :isl\ t'livnaoo. Tlio jiroooss is still rosovtod to in pl:ioos whoro no l"urn;\oos ai\' within ivai"h. Rut whorovor niiuos jtfo opon- od that proiniso suttioiout supplios of oiv. furnaoos arc soon oonstruotod ii\ thoir vicini- ty. Thoso in uso arc of two sorts: tho Soofoh hoarth an>l thon^'orhoratorv. Rosidos thoso. anothor small fun\aoo is ot\on built tor nioltiuij ovor tho sLipt. This is little olso than a oruoihlo lM\ilt in hriok-work, aiul arransTod tor tho Wast to ontor by an apor- tviro in tho baok. ;ind for tho niot.al to tunv out by anothor oponin^ in front, Tho Sootoh hoarth is a small blast furnace, but roson>blos tho open forjfi' or blooniary liiv for ir>M\ oivs. It has long boon in uso in luuvpo. and is tho invest ooninion furn.ioo at vHir own uiinos. In this country it h;is boon jjri\atly iniprvn-od by tho introduction of hot blast ; and in its most perfect form is rop- rv^sentod in tho acconijwnyinsj tiguros; tiguro (I beiuji a vortical section frvMU front to back, and ligure b a horiaontAl section. SOOTV'H nK\RTn rVRSACS. A is tho reserroir of lo*d of the fiiniace, c^>nsistinij of « box, ojhmi at top. aK'>ut two fi,H>t st^uare and one f»H>t deej\ fonned of cast irvni 2 inches thick. Fri'>n» its upper fr^nit eis a hollow shell of cast iron J of an inch thick, its inner and outer sides inclosing a space of 4 inches width. Into this .space the olast is introduced at R, and becoming heated, passes out at K. and thence through tho curved pipe into a tuyere. T, c;»st in the air- chest 'J inches above tho level of the lead reservoir. Hefore eomnieneing operations this n'sorvoir is to be tilled with lead, and is thus kept so long as the furnace is in use ; tho (process being conducted upon the sur- foco of tho ntoltod metal. The furnace mav bo kept in continn;»l operation by addintj new charges of galena every ten or lit'toou minutes, .and working them down attor thev have become rwu in ;»gainst the tuyere jiist before each now charge of ore. that already in the furnace being raked forwarMi<;h the materials. The sulphur in the ore serves itself as fuel, accelerating tho prvicoss by its combustion, and in a few minuter the whole chanre is stirred up. spn^ad out on the hoarth, auvi the luml, unre»luced fragments ari> brvikon in pieces by blows of the sliovel. Slaked lime is sometimes added in small quantity when the jv»rti.-»lly reduiHvI ore be- comes tiHi sot\ and p.asty by excess of heat^ Its et^vt is to lessen this tendency rather bv mochauical than chemical action. If any tinx is used, it is tinor spar, blacksmith's cinders, orbits of iron. Ihe latter h.'»steu tho rciluction by the atlinity of tho ir\^n for the sulphur of the ore. The c;ist irv^n of the air-t>hest is prv>toctOiI fron\ tho action of tho sulphur by tho cooling intluonco o{ the air blown in ; and this is also advant;ia>H'>us bv its keeping tho ftimaco frv^m becoming so hvvt, that the galena would molt before losing its sulphnr, and thus form combinations of oxootHiingly ditlicnlt roiluction. A fan. run by stoAm or water jv>wor, is commonly ora- pioye<.I for raising tho bl.sst : but .is this gives little pressure, it is roplacoil to great adran- tAjTo bv blovrini: ovUnders, With an air- l.tAO. m Tttf.ttiv'iT for (giving regrikrity U> t\ifi ak t>( -At. With Mj';h afi ar/parat'i*, til/; (tffi'ilUrr low frw; a'wt** of air, Tiift o%iAMif>n t/f t\ie can af>ply tJi/- b)a»t with great a/J vantage at Milphur ijs expedited by alrrxAt c/>ristarrt tiro<^ t/-^ [i/:Ip 1/xxKm op the charge and ttirring of tf»« efiarge, whi/:h l/rir>g« fre*h throw ttw: flarne thr'/tigh every part of it ! yitii'nut to ttwi «iirfe/'^;, f;a»i*irig an erolution ITw: ore* are pTfijtAtfA for Kmefting by Wfp- i of white fam««. A* the»i hregin t^/ dimiu'uih, arating from th«ra all the (st/^ny and clayey ' tlie fire U started on the grat*, and the heat pirti<;l*«, arid a« mri/;b ais pontwible of th* is raijsed till tlie cl»arge itfifUioii and the piec^ blende and other imptiritie« tfiat rnay afi- of ore a/lh, in whiA;h the quart/iT of an lioar, when the snuelterr opens orc« are crushed to fine fragrfl«it« and dr'^is- the do'/r to *ee if the metal )>eparat«s and *^ ^'X j'Jf^'f? an'i e made to produce four tons of ' «melter pa»he« the islag to the opp'^te apper lead ; and each fuma/^s 7,500 lb*, everj- 24 edge of the hearth, from whi/:b it is taken houns ; a smelter and his a>Hti>ttant managing out through a d'Kjr on that side by hi* a»- the operation for 12 hoars. At K/^ssie sLi-tant, wiiile he let* off the lead into th« large quantities of lead have thus been receiver. smelted at a daily c^/^t for lalK/r of |.5, and Tlie viparatif/n by this method is not so for fuel of % 1 . 50, making % 1.75 per ton. In perfect a* by the Sc/tch hearth, and the Wisconsin, before the aise of the hot bla^t, expenise of fuel us greater ; but the rerefbe- ea<,-h fumace-iihift was continued from 8 to 10 rat/>rj- is worke/l without the necessitjr of hours, until 30 pig* of lead were pro^lu^ed rteam or water [/ower, which is required to of 2,100 lbs. weight, at an expense of about raise the blaftt for the other process. The $4 for labor, and ^1.30 for fneL | slag's of the reverberatory contain so mach The other tona of fumaee — the rerer- ' lead that they are always remelted ia the beratory — resembles others of this class em- j slag furnace. Those of the Scotch hearth, ployed in smelting copper ores. The sole, ' when pore ore« are employed, are sufficiently or hearth, upon which the ores are spread, is . clear of metal without farther reduction. In about 8 feet in length by 6 in breadth, and Europe other sorts of furnaces are in use, is mallerics have been completed in stone- ■work, 8 feet high and 6 feet wide, for an extent of 8, TS9 yards (nearly five miles). This is from one mill alone. The s;ime pro- prietor has connected with other mills in the same district and in Durham four miles of galleries for the same purpose. The ■writer who gives the account of these in the recent edition of Ure's Dictionary, by Rob-' ert Hunt, remarks: "The value of the lead thus saved from being tot^illy dissipated and dispersed, and obtained from what in common parlance might be called chimney | sweepings, considerably exceeds £10.000 i sterling annually, and tonus a striking illus- tration of the importance of economizing j our waste products." Not ooly is lead lost : in the fumes, but in the working of argentif- erous lead ores, a portion of the silver too is carried otF and deposited with them. The fumes collected at the works of the Duke of Buccleuch yield one-third their weight of lead, and five ounces of silver to the ton. The loss of silver is of little importance in this country, where this metal is not obtained at the present time, unless it be at the Wash- ington mine, in North Carolina, and at the Washoe mines, in California; and conse- quently methods of separating it from the lead possess little more than scientific interest. In the smelting of .argentiferous lead ores, the silver goes with the lead, beins; com- pletely dissolved and diffused throughout its substance. The usual way of separatincj it is founded on the principle of the lead being a metal easily oxidized and converted into the substance called litharge, in which condi- tion it lets go the silver, which has no .aflinity either for the new compound of oxygen and lead, or for the oxygen alone. The change is effected by melting the lead in the shallow basins called cupels, formed of a porous earthy material, as the pulverized ashes of burned bones, kneaded with water, and mixed in a framework of iron. W"hen dried, these are set in a reverberatory furnace, and the pigs of lead are melted upon their sur- face. After being thoroughly heated, a cur- rent of air is made to draw through an open- ing in the side of the furnace directly upon the face of the melted metal. This oxidizes the lead, and the yellow litharge with more or less red oxide, called minium, collects in a thin film upon its surface, and floats otf to the edge, sinking into and incrusting the cupel and falliui; over its side into a recep- tacle placed to receive it. This process goes on, the lead gradually disappearinij as the oxygen combines with it, till with the re- moval of the last films of oxide the melted silver suddenly presents its brilliant, perfectly unsullied face. The oxide of lead may be collected and sold for the purposes of lithai^e, as for a pigment, for use in the manufacture of glass, etc. ; or it may be mixed with fine coal and converted hack into lead, the carbon of the coal effecting this change by the greater affinity it has at a high heat for the oxygen, than the lead has to retain it. By this process, known as cupellation, lead is hardly worth treating for silver, unless it contain about 10 ounces to the ton of the precious metal ; and it was therefore an important object to devise a LEAD. 91 method of saving with economy the silver lost in the large quantities of the poorer argentiferous leads. Such a method was accidentally discovered in 1829 by Mr. Pattinson, of Newcastle, and is now exten- sively in use in Europe for the poorer silver- leads, cupellation being preferred for the richer. He observed that when the lead containing silver forms crystals, as it is stirred while in a melted state, the crystals contain little or none of the silver, and may be removed, thus concentratinsj the silver in the portions left behind. This crystal- lizing process is applied in the large way -as follows : Cast iron pots are set in brick- work side by side, capable of holding each one 4 or 5 tons of lead. The middle one is first charged, and when the lead is melted and stirred, the fire is removed under the next pot to the right ; and into this crystals of lead as they form are ladled by means of a sort of cullender, which lets the fluid lead fall back. This instrument is kept hotter than the lead by frequently dipping it in a pot of lead over a separate fire. When four- fifths of the lead have been transferred to the pot to the right, the remainder, which contains all the silver, is removed to the next pot to the left, and the middle pot is then charged with fresh lead, which is treated in the same manner. The process is repeated with each pot, as it becomes full, four-fifths of its contents going to the next pot to the right, and one-fifth to the next to the left, and thus the lead is finally discharged into moulds at one end, and the argentiferous alloy, concentrated to the richness of 300 ounces of silver to the ton, is run into bars about 2 inches square. From these the silver is obtained by cupellation. At one establishment in Englaud, that of Messrs. Walker, Parker & Co., the weekly product of silver is from 8,000 to 10,000 ounces. Whenever the lead mines of the eastern states are made to yield regular returns of lead, the separation of its silver is likely to be carried on in independent establishments, supplied like the copper-smelting works with material from various sources. Works hav- ing these objects in view were established in the fall of 1860, at Brooklyn, New York, by Messrs. Bloodgood & Ambler, and will commence operations with the smelting of the Washoe silver-lead ores from California, of which over sixty tons have been delivered at the works for reduction. Their success- ful treatment will no doubt be followed by 6* the shipment of other ores of the difl^erent metals from various sources ; and it is to be hoped that it will hereafter be found more advantageous to send ores to New York to be reduced, than to the smelting establish- ments on the other side of the Atlantic. Useful Applications of Lead. — A con- siderable part of the lead product of the world is converted into the carbonate, known a^ white lead, and used as a paint. The prin- cipal articles of metallic lead are sheet lead, lead pipe, and shot. Sheet lead is manu- factured in two ways. The melted lead is upset from a trough suspended over a per- fectly level table, covered with fine sand, and furnished with a raised margin ; and when the metal has spread over this, a couple of workmen, one on each side, carry along a bar supported upon the margin, pushing forward the excess of lead above that neces- sary for the required thickness, till it falls over the end of the table. By the other method, called milling, the lead is cast in a pl.ate, 6 or 7 feet square, and 6 inches thick, and this being taken up by a crane, is placed upon a line of wooden rollers, which form a flooring for the length it may be of 70 or 80 feet and a width of 8 feet. Across the mid- dle of this line are set the two heavy iron rolls by which the lead plate is compressed, as it is passed between them. The top of the lower roll is on a level with the top of the wooden rollers, and the upper roll is so arranged that it can be set nearer to or further from the lower one, as the thickness of the plate requires. Lead pipe was formerly made by turning up sheet lead and soldering the edges ; and is still prepared in this way for the large sizes, as those over six inches diameter. Af- ter this a method was contrived of casting the lead in a hollow cylindrical plug, its inner diameter of the bore required, and then drawing this down through slightly conical dies of decreasing diameter, a mandril or steel rod being inserted to retain the uniform diameter of the bore. Pipes made in this way were limited to 15 to 18 feet in length, and the metal was full of flaws. Many at- tempts have been made to cast long lengths of lead pipe, all of which have proved unsuc- cessful. In 1820 Thomas Burr, of England, first applied the hydraulic press to forcing lead, when beginning to solidify in cooling, through an annular space between a hollow ring and a solid core secured in its centre. He thus produced pipes of considerable MINING INDUSTRY OF THE UNITED STATES. length. The method of forcing the Hquid metal througli dies to form pipes was, how- ever, fii-st p.'iteiited in 1797 by Bramah, who used a pump foi- this purpose. The process was introduced into this country in 1840-41 by Messrs. Tatliam & Brothers, now of New York, who invented and patented an impor- tant improvement in tlie method of secur- ing the die and core. In this operation the melted lead is made to flow from the furnace into a cylindrical cavity in a block of cast iron, which may be of 1 800 lbs. weight, and from this, when cooled to the proper tem- perature, it is forced out through the die by a closel3'-fitting piston. By one process the piston, starting from the bottom of the cylin- drical cavity, moves upward, carrying with it the slender core or rod which determines the diameter of the bore of the pipe, and pushes the melted lead before it through the die fixed in the top of the cast iron block. The pipe as it is formed passes out from the top of the machine, and is coiled around a re- ceiving drum. By the machine contrived by Mr. Cornell of New York, the great iron block containins the lead rises by the press- ure of the hydraulic machine, and the piston which is fixed above it enters the cavity. The piston in this case is hollow and the die is set in its lower end. The core is secured in the bottom of the block, and is carried upward as this rises. The pressure applied in this operation amounts to 200 to 300 tons. Dies are used of a great variety of sizes, accord- ing to the kind of pipe required. Lead wire is made in this way with a die of \-cry small size without a core. It is used for securing vines and attaching tags to fruit trees and shrubs. The principal works in the United States engaged in the manufacture of sheet lead and lead pipe are in New York, Boston, Philadelphia, Chicago, Cincinnati, and Saint Louis. Lead pipe is in general use as the most convenient conduit for water for domestic purposes. It is readily bent to any angle, and is made to adapt itself to any position. When water freezes within and bursts it, the damage is easily repaired ; joints are also made with little trouble. The lead is not liable to become rusty like iron, and is cheaper than tin or copper. These qualities give to it a preference over other kinds of pipe, notwithstanding the ver}- serious objec- tion that the lead is often acted upon b)- the water, and produces poisonous salts of a very dantjerous character. Some waters more than others have a tendency to promote the oxid- ation of the lead. This is particularly likely to occur with nearly all waters in pipes which are alternately exposed to the action of air and water, as when the water being drawn out, the air enters and takes its place. The oxide of lead is converted by carbonic acid gas, which is present in almost all water, into a carbonate of lead which is soluble to some extent in an excess of the gas, and is carried along, bearing no indication of its presence, wdiile the lead pipe continues to be corroded until it may be in places eaten nearly through. The water used for drinking and for culinary purposes is thus continually introducing an insidious poison into the system, the effect of which is at last experienced in the disease known as the painters' colic, often followed by paralysis. As this occurs without a sus- picion being awakened of the real source of the disease, and is produced by quantities so small as from -Jj to J^ of a grain in the gal- lon, the use of lead pipe is properly regard- ed by scientific men as always unsafe ; and some substitute for this metal in pipes and in sheets used for lining water cisterns, is highly desirable. It has been proposed to coat the pipe with some insoluble lining; but such an application necessarily increases its cost, it may perhaps be removed by hot water flowing through the pipe, and the pur- chaser may have no confidence in the coating being faithfully applied, or as certain to be efficient during long-continued use. Block tin is perfectly safe, but it is expensive, and is moreover likely to be alloyed with the cheaper metal lead, which in this condition is thought to be equally dangerous as when used alone. As no popular substitute for lead is provided, it is a reasonable precaution for those employing it to be always watchful and on their gu Carb. of iron, 10,2 < Cai oonic acid . . . ) ' ( 2.9 Silica 11.8 Moisture 2.9 100.0 METALLURGIC TREATMENT AND USES. Zinc ores are ajiplied to practical pur- poses, not only to produce the metal, but also the white oxide of zinc, which is consider- ably used as a paint. The ancients used an ore they called lapis calaminaris, to make brass, by melting it with copper in cruci- bles, not knowing that another metal was thus formed which produced an alloy with the copper. Although the metal was dis- covered in the IGth century, the nature of its ores was little known before the middle of the last century. It is now prepared upon a large scale in Belgium and Silesia, and small quantities are produced in Eng- land, France, and difierent parts of Ger- many. The simple method of obtaining zinc from its ores, called distillation per de- scensiim, was introduced into England about the year 1740, and was derived from the Chinese, who appear to have been acquainted with the metal long before it was known to the Europeans. As now practised in Great Britain, the ores are first calcined, the effect of which is to expel a portion of the water, carbonic acid, and sulphur they contain. They are then ground to powder, and mixed with fine charcoal, or mineral coal, and in- troduced into stationary earthen pots, or crucibles. When set in the furnace, an iron pipe, passing up through the bottom of the hearth, enters the crucible, and connects with an open vessel directly beneath. About six pots are set together under a low dome J of brick-work, through which apertures are M left for filling them. Each one has a cover, which is luted down with fire clay ; and the iron tube in each is stopped with a wooden plug,which, as the operation goes on, becomes charred and porous, so as to admit through it the passage of the zinc vapors. The tubes are prevented from being clogged with de- positions of the condensed zinc, by occa- sionally running a rod through them from the lower end. The zinc collects in the dishes under the tubes, in the form of drops and powder, a portion of which is oxidized. The whole is transferred to melting-pots, ZINC. 99 and the oxide which swims upon the sur- face of the melted metal is skimmed off and returned to the reducing crucibles, while the metal is run into moulds. The ingots are known in commerce as spelter. In the United States zinc was first made by Mr. John Hitz, under the direction of Mr. IJassler, who, by order of Congress, was engaged about the year 1838 to manu- facture standard weights and measures for the cus!K>m-houses. The work was done at the U. S. arsenal at Washington, the ores used being the red oxide of New Jersc}'. The expense exceeded the value of the metal ob- tained, and it has generally been supposed that we could not produce spelter so che.aply as it can be imported from Europe. The next experiments were made at the works of the New Jersey Zinc Company, 1850, on the Belgian plan. In these great difficulties were experienced for want of retorts of suffi- ciently refractory character to withstand the high temperature and the chemical action of the constituents of the ore. The franklin- ite, which always accompanies the red ox- ide ores, was particularly injurious by rea- son of the oxide of iron forming a fusible silicate with the substance of the retorts These trials consequently failed after the expenditure of large sums of mone}'. The next important trial was made in 1856, by a Mr. lloofstettcr, who built a Silesian furnace of 20 muffles for the Pennsylvania and Le- high Zinc Company at their mine near Friedensville. This proved a total failure, and seemed almost to establish the impracti- cability of producing spelter with the Amer- ican ores, clays, and anthracite. About this time Mr. Joseph Wharton, the general man- ager of the Pennsylvania and Lehigh Zinc Company, and Mr. Samuel Wetherill, of Bethlehem, both hit upon the same plan of treating zinc ores in an open furnace, and leading the volatile products through incan- descent coal, in order to reduce the zinc ox- ide so formed, and draw only metallic and carbonaceous vapors into the condensing apparatus. Mr. Wharton constructed his furnace in Philadelphia, and Mr. Wetherill his in Bethlehem. The former having com- pleted his trials, filed a caveat for the proc- ess, but soon after abandoned it as econom- ically impracticable. The latter continued his operations, patented the method, and produced some zinc, eight or ten tons of which were sold to the U. S. Assay Ofiice in New York. The manufacture was not, however, long continued. In 1858, Mr. Wetherill recommenced the production of zinc, adopting a plan of uprirrht retorts, somewhat like that in use in Carinthia, in Austria, and that of the English patent of James Graham. Mr. Wetherill had suc- ceeded in procuring good mixtures of fire clays, and his retorts made of these and holding each a charge of 400 lbs. of ore, proved sufficiently refractory for the opera- tion. The works now under his charge at Bethlehem, erected in 1858-9, and belong- ing to the owners of the Saucon mine, have a cap.acity of about two tons of metal daily. Mr. Wharton, after abandoning the method of reduction by incandescent coals, continued his experiments on different plans, and finally decided on the Belgian furnace as tlie best, after having actually made spel- ter fi'om silicate of zinc, with anthracite, in muffles of American clays, at a cost below its market value. These trials were made in the zinc oxide works of the Pennsylvania and Lehigh Zinc Company. Their success encouraged the company to construct a fac- tory at Bethlehem for reducing zinc ores, and this was done under the direction of Mr. Wharton in 1860. The capacity of the works is about 2000 tons per annum, and their actual daily product in the winter of 1860-1, is over three tons. Four stacks or blocks are constructed, each containing four furnaces. To each furnace there are jG retorts, making in all 896, working two charges in twenty-four hours. Their total capacity is about five tons of metal. Be- sides the ordinary spelter of this manufac- ture, which, as will be seen by the remarks that follow, is remarkable for its freedom from injurious mixtures, and is the best commer- cial zinc in the world, Mr. Wharton also prepares from selected ores a pure zinc for the use of chemists, and for purposes in which a high degree of purity is essential. This is cast in ingots of about nine pounds each, and is sold at the price of ten cents per pound. For the supply of chemists, and for the batteries employed by the telegraph companies, the American zinc of this manu- facture is preferred to all others. The total annual consumption of crude spelter in the United States amounts to the value of about $600,000 ; and the value of sheet zinc, nails, etc., is about as much more. The commercial zincs, it has long been known, are contaminated by various foreign substances, the existence of some of which L ofC. 100 MINING INDUSTRY OF THE UNITED STATES. is indicated in the finely divided Uadi. sub- stance vvhicli remains floating or sinking in the liquid, when the metal is dissolved in dilute acids. The impurities have been stated by different chemists to consist of a great variety of substances, such as lead, cadmium, arsenic, tin, iron, manganese, car- bon, etc. The}' injuriously affect the quality of the metal for many of its uses ; and the presence of one of them, arsenic, is fatal to the highly important use of zinc by chemists, as a reagent in the detection of arsenic in other substances. Arsenic in the form of a sulphuret often accompanies tlie native sul- phurets of zinc, and its oxide, being volatile, is readily carried over with the zinc fumes in the metallurgic treatment of blende, and may thus bo introduced into the spelter. It is evidently, therefore, a matter of consequence to know the qualities of the different zincs of commerce, and the e.xact nature of the impurities they contain. Very thorough in- vestigations having these objects in view have recentlv been made in Cambridge, Massachusetts, by Messrs. Charles W. Eliot and Frank II. Storer of Boston, and tlie re- sults of these, with a full description of their methods of examination, were communicated, May 29, 1860, to the American Academy of Arts and Sciences, and published in the eighth volume of the new series of their Memoirs. Eleven varieties of zinc from dif- ferent parts of Europe, and made from the ores of New Jerse_v, and of the Saucon val- ley, Pennsylvania, were experimented upon, of all of which large samples were at hand. These varieties were the following: 1, Sile- sian zinc; 2, Vieille Montague zinc; 3, New Jersey zinc ; 4, Pennsylvanian zinc, Beth- lehem, Pennsylvania ; 5, Vieille Montague zinc, employed at the Uniteil States mint, Philadelphia; 6, zinc of MM. liousscau, Freres, Paris, labelled and sold as zinc pur ; 7, sheet zinc obtained in Berlin, I'russia; 8, zinc made near Wrexham, North Wales; 9, zinc from the Mines Royal, Neath, S(juth Wales ; 10, zinc from the works of Dillwyn & Co., Swansea, South Wales; 11, zinc from the works of Messrs. Vivian, Swansea. All of these, except the Pennsylvania zinc, furnished an insoluble residue, which was found to consist chiefly of metallic lead, and this proved to be the principal impurity of all the samples examined; "the carbon, tin, copper, iron, arsenic, and other impurities found in the metal by previous observers, occur either in very minute quantities, or rarely, and doubtless accidentally." The proportions of load present in 100 parts of each of the varieties examined were respect- ively as follows : in No. 1, 1.46 ; 2, 0.292 ; 3,0.079; 4,0.000; 5,0.494; 6,0.106; 7, 1.297; 8,1.192; 9,0.823; 10,1.661; 11, 1.516. The New Jersey zinc was found to contain a sensible quantity of tin, copper amounting to 0.1298 per cent., iron 0.2088 per cent., and an unusually large amount of arsenic. Traces of this were also detected in the wdiite oxide prepared from the ores of the New Jer:3ey mines, and in the red oxide ore itself; but the same ore aftbrded no clue as to the source whence the copper was derived, a metal of which not the slight- est traces were discoverable in the other zincs. None of the samples contained suf- ficient arsenic to admit of its proportion be- ing determined, and some were entirely free from it, as some of the Belgian and Pennsyl- vania spelter, but traces of it were mot with in other samples from the same regions, in- dicating that the occasional use of inferior ores, such as blende, intermixed with the carbonates and silicates, might introduce this substance, or possibly it might come over only in tlie first part of the distillation, and the zinc collected in the latter part might be quite free from it. The Silesian zinc contained minute (luantities of sulphur and arsenic ; and the English zinc more ar- senic than any other, except perhaps the New Jersey. The purest of all the samples was that from Bethlehem, Pennsylvania, some of it yielding no impurity, except a trace of cadmium. The source of a trace of arsenic in another sample is supposed to bo in the use of the crust of oxide of zinc from the operations connected with the manufacture of white oxide of zinc, no par- ticular care being taken in that process to reject inferior ores, and this crust being taken to the other works where the metal is prepared and mi.xcd with the selected ores employed for this use, it has thus introduced the arsenic. As the authors of the paper remark, there seems to be no reason why zinc of uniform purity should not bo ob- tained from the excellent ores of the Saucoa valley mines. EUROPEAN MANUFACTURE. A large portion of the zinc of commerce is furnished by the works of the Vieille Montague Company, established near the frontier of Belgium and Prussia, chiefly in 101 the province of Liege of the former country. A large number of mines are worked in this region, the most important of which is that of the Vieille Montagne or Altcnberg, sit- uated in the village of Moresnet, between Aix-la-Chapelle and the town of Liege. It is said that the great body of carbonate of zinc found here was worked as long ago as the year 1435, and that for four centuries it was not known that the ore was of metallic character, but it was used as a peculiar earth adapted for converting copper into brass. The ore lies in a basin-like depression in strata of magnesian limestone, and is much mixed with beds of clay intercalated among its layers. The ore is chiefly carbonate mixed with the silicate and oxide of zinc. Some of it is red, from the oxide of iron in- termixed, and this produces only about 3.3 per cent, of metal. The purer white ore yields about 46 per cent., and is moreover much preferred on account of its working better in the retorts. The furnaces em- ployed in the distillation of these ores are constructed upon a very large scale, and on a ditferent plan from those in use in Great Britain. The general character of the oper- ations, however, is the same. The ores are first calcined, losing about one fifth of their weight. They are then ground in mills, and charges are made up of 1100 lbs. of the powdered ore mixed with 550 lbs. of fine coal. The mixture being well moistened with water, is introduced into cylindrical re- torts, which are three feet 8 inches long and 6 inches diameter inside, set inclining outward, to the number of 42 in a single furnace, and 4 suoli furnaces are construrted in one stack. The open end of each retort connects, by means of an iron adapter 16 inches long, with a wrought-iron cone, the little end of which, projecting out from the furnace, is only an inch in diameter. After the charges have been sufficiently heated, the sublimed zinc condenses in tlie neck of the retort and in the adapter and cone. The last two are then removed, and the zinc and oxide are collected from them, and the liq- uid metal in the neck of the retorts is drawn out and caught in a large ladle, from which it is poured into moulds. The zinc thus obtained is remelted before it is rolled. Two charges are run through in twenty-four hours, each furnace producing from 2200 lbs. of ore about 620 lbs. of metal, which is about 30 per cent. From a late report of these operations it appears that there are seven large smelting establishments belong- ing to the Vieille Montagne Zinc Mining Company, on the borders of Belgium and Prussia, comprising 230 furnaces. The an- nual product of these is 29,000 tons of spel- ter, of which 23,000 tons are converted into sheet zinc, and about 7000 tons are rolled at mills not the property of the companv. They also manufacture oxide of zinc in three es- tablishments devoted to this operation, to the amount of about 6000 tons annually. The company also purchases spelter very larg-ely. The metallurgy of zinc has, within a few 3'ears past, become an important branch of industry in Upper Silesia on the borders of Poland, and not far from Cracow. In 1 857 there were no less than 47 zinc works in this part of Prussia, one of which, named Lydog- niahiitte, at Konigshiitte, belonged to the government, and the remainder were owned by private companies and individuals. In that year their total production was 31,480 tons of spelter, valued at about 17,660,000 francs. Many of the establishments belong to the Silesian Company, which also owns several coal mines near their works, and a number of zinc mines. The government works are supplied with ores from their own mines, and also from all the others, being entitled to one twentieth of their product. From a description of the operations pub- lished in the sixteentli volume of the Aiii,alis dis Mines, fifth series, 1859, it appears that the processes are the same which had been emploved for full twenty years previouslv, and each establishment presents little else than a repetition of the works of the others. The furnace in use is a double stack, fur- nished along each side with horizontal ovens, into each of which three muffles or retorts are introduced. These are constructed of refractory fire clays, and are charged, like the retorts of gas furnaces, by conveying the material upon a long charger or spoon into the interior. Their dimensions are about 4 feet long, 22 inches high, and 84 inches wide, and the weight of the charge introduced is only about 55 pounds. The ovens on each side of the stacks contain as many as 2U and sometimes 30 retorts. The same stack con- tains besides, 1st, an oven in which the ores belonging to it are roasted for expelling the water and a portion of the carbonic acid they contain (a process in which they lose about i their weight) ; 2d, an oven for baking the retorts, each establishment making its own ; and 3d, a furnace for remelting and purifying 102 MINING INDUSTRY OF THE UNITED STATES. the zinc obtained from, tlie retorts. Several stacks are arranged in a large building with close walls and open along the top of the roof to allow the smoke to escape. On one side, ciinnectcd with it, are the workshops in which the muffles are made and various other operations are carried on. The principal zinc mines are in the vicin- ity of Licuthen, and are f lund in the magne- sian limestones of tlie new red sandstone f»rmation. They are connected with the zinc works, which are principally near Ko- nigshlittc, by branch railroads connecting with the principal line of road between Tarnowitz and Kattowitz. The ores are chiefly carbonates, always mixed with much oxide of iron, which is sometimes present to the extent of 20 per cent., and with them is also associated more or less silicate of zinc, blende, galena, and cadmium. Their per- centage of zinc is very variable, rarely reach- ing 35, and probably averaging 21 or 22 per cent. Much that is worked does not exceed 12 per cent. They lie in irregular deposits, and it is found that their yield of zinc has been gradually falling oil', so that it is now only about two fifths of what it was formerly. This low yield involves a large consumption of fuel, which is 20 tons for one of zinc ob- tained ; and if this deterioration continues, the mines must some time hence be aban- doned. The coal employed in working the ores is of poor quality, burning without flame ; but it leaves no cinder, and is pro- cured from mines very near the works, and at the extraordinary low price of 6 to 7 francs the lUOO kilogrammes (about one ton). The retorts are charged every 24 hours with roasted ore reduced to the size of nuts, and mixed with oxide of zinc from previous op- erations, with the dross from the crucible employed in remelting, with the incrustations from the muffles and their connections out- side the furnaces, and in fine with cinders that liave fallen through the grates, these last making about J the bulk of the charge. The workmen having discharged a muffle of the liquid zinc and oxide remaining from the previous operation by draw ing them forward, so that they fall upon an iron shelf placed below to catch them, and having repaired any cracks and holes in the muffle, they in- troduce the new charge in small portions at a time, and immediately adjust the outer con- nection, which is also of earthenware bent down at a right angle, and close up the openings in front. The zinc soon begins to distil over, and drops down upon the iron shelf, forming pieces of all shapes ; and it is more or less mixed with oxide colored yel- low by the oxide of cadmium. When re- melted and run into moulds, the spelter is ^tated to have about the following composi- tion : zinc, 97.50, cadmium, 1.00, lead, 0.20, arsenic, 0.84, sulphur, 0.05, together with traces of tin, iron, and carbon ; but the char- acter and proportion of the impurities are probably very variable. The expenses of the manufacture at the royal works amount- ed for the year 1856 to 48.00 francs the metrical quintal (220.4T lbs.), and in 1858 to 54.84 francs ; consisting in the latter year of the following items : ore, 26.84 ; fuel, 14.30; labor, 7.00; materials employ- ed. 3.70 ; general expenses, 3.00. The oper- ations of the Silesian Company at their several works for the first half of the year 1858 are thus presented : — COST OF THE SEVERAL ITEMS PER Zinc Name of Worlcs. Ores treated, obtained. Met. quint. Met. quint. Gabor Silesia 112,^99 19,703 PauLsliiitte 40,'iS4 4,928 Tliurzoliiitte 37,458 4,495 Frieaunsliiitte 15,345 2,346 Slanisla.sliutte 40.534 3,978 Carlsliiitte 45,918 5,723 292,438 41,173 The general consumption of spelter throughout the world is estimated in the report to which we have already referred, re- lating to the Vieille Montague Company, to be about 67,000 tons, of which about 44,000 tons are sheet zinc applied as fol- lows : — METRICAL QUINTAL or, PRODUCT. (n.^t of Sundry lalHir. Fuel. Ores. expi-nsea. Totjil cost. Friines. Fn\ncs. Francs. Frnnes. Fianes. 4. IIS 10.35 11.40 4.27 31.00 7.10 14 69 14.24 4.77 40 80 7.57 12 08 12.92 4.90 37.47 5.9G 10.66 13.98 4.62 35.22 8.83 16.18 15.66 6.23 46.90 15.06 14.80 13.23 6.91 41.00 Tons. For roofing and architectural purposes 23,000 " sheathing of ships 3,500 " lining packing cases 2,500 " domestic utensils 12,000 " stamped ornaments 1,500 " miscellaneous uses 1,500 44,000 103 Tlie estimate of 67,000 tons as the total annual production of zinc is probal)ly too small for Europe alone. Taking the product above given of the works of the Vieille Mon- tague Company, viz., 1^9,000 ton?, and that of the Silesian furnaces, 31,480 tons, there remain only 6,520 tons to be divided among the other zinc-producing countries. These arc Poland, on the borders of Silesia, the annual production of which is usually given as 4000 tons ; England, whicli has rapidly advanced from 1000 tons of spelter per an- num to 6900 tons in 1 S5S ; Austria, which produces 1500 tons; Sweden, 40tons; and the Hartz 10 tons. Zinc, it is believed, is also manufactured to some extent in Spain. The European production would, therefore, seem to exceed 73,000 tons, and for the total production of the world, that of the United States and of China should be added. Of the extent of the manufacture of the latter country we know nothing. The United States p'-oduccs of oxide of zinc and spelter over 7 'lOO ton'.nnd itnnort^l "2.000, annually. The value of the ores at ditTerent costs of the metal is given in the following recently prepared table from one of the European houses : — • SCHEDULE OF THE COST OF ZINC ORE ON SHIPBOARD AT ANTWEKP. CARBONATE OF ZINC. «, ♦„! „ ...I, KA f „ ,1 „ Met.nl wfirth Metal worth 60 Metal worth M fmncs the . , ,. ^ - . , ^^ 100 k,logra,„.nes. ki,„gr.anunes. kil...-.-,mimes. Percentase V;ilne of 100 Value of 100 Value of 100 of zinc by kilniTatnines. kilosranimes. kilosrnnimes. •calvsis. Francs. Francs. Francs. ib SO 00 94.50 lli;i 00 45 lO'i.SO llO.aO IMU.oO 50 1-J5.00 144.50 10400 55 147.50 1G0.50 Ifll.oO 60 no.no 194, 50 210,00 65 192.50 219.50 24G.50 ■JO 215.00 244.50 '274.00 SILICATE OF ZINC. 40 45.00 57.00 69.00 45 67.50 82.00 9G.50 50 90.00 107.00 124,00 55 112.50 132.00 151.50 60 135.00 157.00 179.00 65 157 50 182.00 206.50 70 180.00 207.00 234 00 A kilogramme is equivalent to 2205 lbs avoirdupois. Twentv-live years ago the qiiiintity of zinc used for rooting did not exceed 5,000 tons per annum, and no zinc was employed for sheathing ships, or lining packing cases. The stamped ornaments in this metal only came into use in 1852. In Germany zinc is now very generally used for roofing ; and in Paris it has been employed for nearly every roof constructed during the last twenty-five years. In laying the sheets great care is taken that the metal has sufficient room to expand and contract by change of tempera- ture ; and especially ihat it is fastened with zinc nails, and is allowed to come nowhere in contact with iron— even with nail heads. The purer the metal the longer it lasts. Besides the uses named for this met.al, it is em;iloyed for coating sheet iron, making what is called galvanized iron ; for pipes for conveying liquids: for baths, water-tanks, mi'.k-pans and pails, plates for engraving ; for galvanic batteries ; for nails, spikes, and wire; for signs ; music printing; and for the cornices of buildings. It has also been cast into statues, in imitation of bronze. The Vieille Montague Company sent to the Great Exhib tiou in London a statue of Queen Vic- toria, which with its pedestal of zinc was twenty-one feel high. By a process some- what like lithography, called Zincography, drawings, old engravings, and autograph let- ters are transferred to it, and afer treatment with acids, printed from a raised surface. A ui.diticationof this process called Photozinc- o_n-ai)hy, accom|ilishes the difficult ta-k of printing fVom a photograph. Zinc is also an important reagent in chemic-d operations, and is employed with sulphuric acid to de- compose \vat«r for obtaining hydrogen gas. ZIXC PAINT. White oxide of zinc was first recom- mended as a substitute for white lead by the celebrated Guyton de Morveau about the close of the last century, during his in- vestigations on the subject of lead poison- ing ; and to him it was suggested by Cour- tois, a manufacturer at Dijon. The liigh price of zinc at that time, and ignorance respecting the proper manner of using the oxide of zinc, prevented its introduction. It was many years after this that methods of producing it as cheaply as white lead were devised by M. Leclaire, a house-painter of Paris ; and he also first prepared to use with it a scries of yellow and green unchangeable colors, to replace those before in use having noxious bases of lead, copper, or arsenic ; and also a drying oil, prepared by boiling linseed oil with about five per cent, of oxide of manganese. His process, which is still the one in general use in Europe, is based I on the treatment of the metal instead of the ore, as practised in this country, and scarcely I any white oxide of zinc is there made by 104 MINING IXOrSTRV OF THE UNITED STATES. any other method. The furnaces employed are similar to tliose for producing the metal, or like those of the gas works. When the retorts set in these furnaces have become very hot, they are charged witli the ingots of zinc. The metal soon melts, and its vapor passes off through the outlets of the retorts, where it meets a current of air, and 'both together are drawn on through the condensing apparatus either by the drauglit of a chimney, or by an exhausting fan at the further extremity of the apparatus. The metallic vapors become oxidized by mixing with the air, and are converted into a light, flaky, white powder, which is the oxide of zinc. The arrangements for condensing and collecting this are similar in principle to those employed for the same ])urj)uses in the American process. By making use of the metal in retorts, instead of subliming it from ores contaminated with their own im- purities, and mixed with the coal required for conducting the process, a much purer oxide of zinc is obtained ; and by selecting the purest sorts of spelter, the beautiful article, called by the French blanc dc iieiije, or " snow-white," is produced, which is employed by painters in the place of the " silver-white." With the use of other zinc, the product is fit to be substituted for the best white lead. JJut if the metal has been made from ores containing cadmium or iron, or if old zinc has been introduced to which any solder adheres, according to the French chemists oxides of other metals are pro- duced, and are taken up in small quantities with the zinc vapors, imparting to the oxide a slightly yellow or greenisli tint, which if not very decided may liowevcr disappear when the paint is mixed ; but the expe rience of American manufacturers does not accord with tliis explanaticm. The manufacture of white oxide of zinc direct from the ore is a purely American process, established by the experiments of Mr. Richard Jones of rhiladelphia in the year 1850. The great bodies of the rich ores of northern New Jersey had at various times, for the past two centuries, attracted the attention of many persons interested in metallurgical operations ; and of late years numerous attempts had been made to devise some method of converting them to useful purposes. Zinc, however, was a metal not much in demand, and nothing was known of the useful qualities of the white oxide. When tlie value of this had been demon- strated in Europe, and the practicability of producing it economically from the red oxide was shown, a company was organized in New York under the name of the New Jersey Zinc Companj", for the purpose of carrying on this manufacture up,.-)S3 ISGl .5911,280 19,100 1862 254,033 .'•63 1863 518,149 '',681 1864 675,931 3,973 1865 .'(51,876 47,790 1866 1,149,>-!I5 38,108 1867 56-J,902 3,174 1868 561,633 18,028 ls69 1,197,682 4,022 1870 1,003,432 833 The importance of the application of white zinc to painting in the place of white lead appears to have been much more fiillv appre- ciated in France and the United States than in Great Britain. Soon after the discoveries of Lcclaire that white oxide of zinc could be thus used, and produce, with the colored bases he prepared of this and other iiniocu- ous oxides, all the tints required, the French gnvernment, recognizing the importance of his inventions, conferred upon him the cross of the Legion of Honor, and ailopted the paints for the public building.s. By the year 1849, over 6000 public and private build- ings had been painted with ids prepara- tions, and the testimony was very strong in their favor. Not one of his workmen had been attacked by the painter's colic, though previously a dozen or more suffered every 3'ear from it. The colors were pronounced more solid and durable than the old, were made brighter by washing, and were not tar- nished by sulphuretted hydrogen, as occurs to white lead. The best white paint was moreover so pure and brilliant a white, that it made the best white lead paint by its side look disagreeably yellow and gray. No dif- ficulty was experienced in making the new colors, mixed with the prepared oil, dry rapidly without the use of the ordinary dryers of lead compound ; and used in equal weight with le.ad, the zinc was found to cover bet- ter, and was, consequently, more economical at equal prices per lb. The English, how- ever, fountl many objectionable qualities in the new paint. Its transparency, which is the cause of its brilliancy, by reflecting in- stead of absorbing the light, was regarded as a defect, and the painters complained that it had not the body or covering properties of the carbonate of lead. It would not dry rapidly for the second coat without the use of the p.atent dryers, which contain lead, and therefore it was no better than the lead. Messrs. Coates & Co., who now import into Great Britain about 1000 tons of oxide of zinc per annum, wrote to the editor of the Lancet in March, 1 860, that the consumption of white lead is still nearly 100 to 1 of white zinc, and tliat in 1856 the importation of the latter amounted to only 235 tons. They as- cribe the real cause of tiie larger consumption of white lead, to the almost entire exclusion of zinc, to the fact, that white lead can be adul- terated with b;irvtes and f)ther cheap ingre- dients without the adulteration beingdetected by the eye, thus securing large profits to the manufacturer and contractor, which cannot be realized in the use of zinc paint, for the reason that it has little afiinity for foreign sub- stances. The experience of the manufacturers of the United States docs not substantiate this statement as to the difficulty of using the oxide of zinc in mixture with other substances. It is etnployermer to one of the latter. Bismuth is sometimes added to increase the fusibility of the allov. CH-VPTER IX. WAL. To the early settlers of the Americiin colo- nies the beds of mineral coal they met with wen? of no interest. In the abundance of the forests aniund them, and with no manufac- turinj operations that involved l.^rge con- sumption of fuel, they attached no v:ilue to the bliick stony coal, the real importance of which w.as not in fact appreciated even in Europe until after the invention of the steam engine. The e.irliest use of niiner.d coal was probably of the anthracite of the Lehigh re- gion, though it may be that the James River bituminous coal mines, 12 miles above Rich- mond, were worked at an earlier period than the Pennsylvania anthi-.icitcs. The region containing the latter belonged to the tribes of the Six Nations, until their title w.ts ex- tinguished and the proprietary government obtained possession, in 1 740, of a territory of 3750 square miles, including the southern and middle of the three anthracite coal-tields In 1 76S possession was acquired of the north- ern eoal-tield, and at the same time of the great bituminous region west of the Alle- ghany mountains. The existence of coal in the anthracite region could not have escaped the notice of the whites who had explored the country, for its great beds were exposed in many of the n.itural sections of the river banks and precipitous hills, and down the mountain streams pieces of co;il, washed out from the beds, were .abundantly scattered. The oldest maps now known, dating as far back as 1770, and compiled from still older ones, designate in this region localities of " coal ;"' but these were probably not re- garded as giving any additional value to the territorv. The first recorded notice of its use was in tlie northern basin by some black- smiths in 1770, only two years after the whites came in possession; and in 1775 a boat load of it w.as sent down from "W'ilkes- barre t.> the Continental .armory- at Car- lisle. This was two years after the laying out of the borough of Wilkesbarre by the Susquehanna Land Company of Connecti- cut, From this time the coal continued to be used for mechanical operations by smiths, distillers, etc.: and according to numerous certificates from the-^. published in 1S15, in a pamphlet by Mr. Z;iehariah Cist of Wilkesbarre. they had found it very much better for their purposes, and more econom- ical to use than Virginia bituminous coal, tliough at the enormous price of 90 cents a bushel. Gunsmiths found it very conven- ient for their small fires, and one of them, diiting his certificate December 9, 1814, stated that he had used it for 20 years, con- sumin8,437 tons for the year 1867, and sustains numerous branches of metallur- gical and mechanical industry, the possible dependence of which upon this fuel and source of power was hardly dreamed of when its mines were tirst opened. The existence of bituminous coal west of the AUeghanies was probably known as early as was that of anthracite in the eastern part of Pennsylvania; and on the western rivers it could not fail to have been noticed by the early missionaries, voyageurs, and hunters. In the old maps of 1770 and 1777 the oc- currence of coal is noted at several points on the Ohio. A tract of coal land was taken up in 1785 near the present town of Clear- field, on the head-waters of the west branch of tlie Susquehanna, by Mr. S. Boyd, and in 1804 he sent an ark load of the coal down the Susquehanna to Columbia, Lancaster county, which, ho states, caused much sur- prise to the inhabitants, that "an article with wliich they were wholly unacquainted should be thus brought to their own doors." This was the commoncoraent of a trade which has since boon prosecuted to some extent by running rafts of timber loaded with coal, and sometimes with pig iron also, from the head- waters to the lower portion of the Susque- hanna. The bituminous coal mines on the James River, 12 miles above Richmond, in Virginia, wore also worked during the last century, but at how early a period we are ignorant. In an account of them in the first volume of the " American Journal of Sci- ence," published in 1818, they are spoken of as already having boon worked 30 years. VARIETIES OF COAL. The mineral coals are found of various sorts, which are distinguished by peculiari- ties of appearance, composition, and proper- ties. Derived from vegetable matters, they exhibit in their varieties the successive chang- es which these have undergone from the condition of peaty beds or deposits of lig- neous materials — first into the variety known as brown coal or lignite, in which the bitu- minous property appears, while the fibre and structure of the original woody masses is fully retained ; next in beds of bituminous coal comprised between strata of shales, fire- clay, and sandstones ; and thence through several gradations of diminishing proportions of bitumen to the hard stony anthracite, the composition of which is nearly pure carbon; and last of all in this series of steps attend- ing the conversion of wood into rock, the vegetable carbon is locked up in the miner- al graphite or plumbago. These steps are clearly traceable in nature, and in all of them the strata which include the carbonaceous beds have undergone corresponding changes. The clayey substratum that supports the peat appears under the beds of mineral coal in the stony material called firo-clay (used when ground to make fire-brick) ; the muddy sediments such as are found over some of the groat modern peat deposits, ap- pear in the form of black shales or slates, which when pulverized return to their muddy consistency ; the beds of sand, such as are met with in some of the peat districts of Europe interstratified with difi'erent peat beds, are soon in the coal-measures in beds of sandstones ; and the limestones which also 122 MINING INDUSTRY OF THE UNITED STATES. occur in the same group of strata, represent ancient beds of calcareous marls. The slow progression of these changes is indicated by the different ages of the geological formations in which the several varieties occur. Beds of peat are of recent formation, though some of them are still so old, that they are found at different depths, one below another, separated by intervening layers of sand, cla}', and earth. Brown coal, or lignite, is commonlj' included among the strata of the tertiary period ; the bituminous coals are in the secondary formations; and the an- thracites, though contained in the same ge- ological group with the great bituminous coal formation, are in localities where the strata have all been subjected to the action of powerful agents which have more or less metamorphosed them and expelled the vola- tile bitumen from the coal. The graphite or plumbago is in still older groups, or in those which liave been still more metamorphosed by heat. All these varieties of fossil fuel are found in the United States. Peat beds of small extent are common in the northern portion of the country, and in some parts of New England are nmch used for fuel, and the muck, or decomposed peat, as a fertilizer to the soil. In the great swamps of southern Virginia, the (Jarolinas, and Georgia, vegeta- ble depositsof similar nature are found upon a scale more commensurate with the extent of the ancient coal-beds. Lignite is not found in workable beds, as in some parts of Germany and England, but in scattered de- posits of small extent among the tertiary clays, chiefly near the coast of New Jersey, Delaware, and Maryland, and in the west- ern territories. The distribution of the true coal formations will be pointed out after des- ignating more particularly the characters of tlic different coals All of these consist of the elements carbon, hydrogen, oxygen, .and nitrogen; the carbon being in part free, and in part combined with the other ele- ments to form the volatile compounds that exist to some extent in all coals. Earthy matters which form the ash of coals are al- ways intermixed in some proportion with the combustible ingredients, and water, also, is present. When coals are analyzed for the purpose of indicating their heating qual- ity by their composition, it is enough to de- termine the proportions of fixed carbon, of Tolatile matter, and of ash which they con- tain. How the combined carbon, hydrogen, oxygen, and the little nitrogen in their com- position, may be distributed in the forms of carburetted hydrogen, ammonia, the bitu- minous oils, etc., cannot be ascertained by analysis, as the means employed to separate most of these compounds cause their ele- ments to form other combinations among themselves: the determination of the ulti- mate proportions of all the elements would serve no pr.actical purpose. So, if it bo re- quired to prove the fitness of any coal for art'ording illuminating gas, or the coal oils, it must be submitted to experiments having such objects only in view ; and even their capacity for generating heat is better deter- mined by comparative experiments in evapo- rating water, than by any other mode. The bituminous coals are characterized by their large proportion of volatile matter, which, when they are heated, is expelled in various inflammable compounds, that take fire and burn, accompanied by a dense, black smoke and a peculiar odor known as bituminous. If the operation is conducted without access of air, .as in a closed platinum crucible, the fixed carbon remains behind in the form of coke ; and by removing the cover to admit air, this may next be consumed, and the re- siduum of ash be obtained. By several J weighings the proportions are indicated. ' Coals containing IS per cent, or more of volatile matter are classed among the bi- tuminous varieties ; but as the proportion of this may amount to 70 per cent, or more, there is necessarily a considerable difference in the characters of these coals, though their most m.arked peculiarities are not always owing to the difterent amounts of volatile matter they contain. Thus, some sorts, called the " fat I ituminous," and "caking coals," that melt and run together in burning, and are especiallv suit.able for making coke, con- tain about the same proportion of volatile matter with the "dry coals," as some of the canni I and other varieties, which burn with- out melting, and do not make good coke. Other varieties are especially distinguished for their largo proportion of volatile ingre- dients; such are the best cannels, and those • light coals which have sometimes been mis- taken for asphaltum, as the Albert coal of the province of New Brunswick. These va- rieties are eminently qu.alified for producing gas or the coal oils; but have little fixed car- bon, and consequently can produce little coke. Coals that contain from 11 to 1 8 per cent, volatile matter, are known as semi-bi- 123 tuminous, and partake both of the qualities of the true bituminous coals, in igniting and burning freely, and of the anthracite in the condensed and long-continued heat they produce. The Maryland coals, and the Ly- kens valley coal of Pennsylvania, are of this character. The true anthracites con- tain from 2 to 6 per cent, of gaseous mat- ters, which by heat are evolved in carbu- retted hydrogen and water, even when the coal has been first freed from the water me- chanically held. Their greatest proportion of solid carbon is about 95 per cent. There remains a class which has been designated as semi-anthracite, containing from 6 to 11 per cent, of combustible volatile matter. These coals burn with a yellowish flame, un- til the gas derived from the combination of its elements is consumed. The earthy ingredients in coals, forming their ash, are derived from the original wood and from foreign substances introduced among the collections of ligneous matters that make up the coal-beds. The ash is unimportant, excepting as the material which produces it takes tiie place of so much combustible matter. In some coals, espec- ially those of the Schuylkill region, it is red, from the presence of oxide of iron, and in others it is gray, as in the Lehigh coals. This distinction is used to designate some of the varieties of anthracite ; but the qual- ity of these coals is more dependent on the quantity of the ash, than on its co\i>t. From numerous analyses of the Schuylkill red ash coals an average of 7.29 per cent, of ash was obtained, and of the white ash anthracite, 4.02 per cent. Coals producing red ash are more likely to clinker in burning than those containing an equal amount of white ash. In some varieties of coal the proportion of earthy matter is so great that the substance approaches the character of the bituminous shales, and may be called indifferently ei- ther shale or coal. Though such materials make but poor fuel, some of them have proved very valuable from the large amount of gas and of oily matters thev afford. The most remarkable of this class is that known as the Boghead cannel. This is largely mined near Glasgow, in Scotland, and is im- ported into New York to be used in the manufacture of coal oil. It is a dull black, stony-looking substance, having little resem- blance to the ordinary kinds of coal. Its composition is given for comparison with that of other coals, in the following ta- ble :— g < ^ Localities. Authority. 8P''<^i«o •' Gravity. Shenowlth Vein, Penn H. D. Rogers 1.50 Peacii .Mountain, I'cnu. ; mean of 40 analyses W. K. Johnson 1.46 Lackawanna Heaver Meadow I Price's Mountain, Montgomery Co., Virglfiia.. Portsmouth. Khode Island Mansfield, Mass Atkinson's and Templenian's, Maryland ; aver- ( age of 2 specitiiens j George's Creek. Maryland 'Pittsburg, Pennsylvania i'annelton, Indiana Black Heath, .lames River, Virginia Monroe Co., S. Illinois La Salle Co., N Illinois Albert Coal, New Orunswick Grayson (Ky.) cannel Breckenridge (Ky.) cannel Boghead, black cannel _ Boghead, brown . , .W. E. Johnson 1.43 1.66 .A. H. Everett 1.31 .Dr. C. T. Jackson... 1.85 1.69 W. E. Johnson I.SIS 1.3S .B. Silliman, jr.... . VV. R. Johnson.. . 1.272 .J. O. Norwood 1.246 " 1.23T .B.Sillimsn, Jr 1.129 1.8T1 " 1.150 .Dr. Penny 1.213 " 1.160 Carbon. 94.10 86.09 8S.9S 91.64 89.25 85.84 87.40 76.69 70.75 64.72 69.47 58.79 58.70 55.10 86.04 14.36 27.16 9.25 7.10 "Water and other Vol. Mat. 1.40 6.96 6 36 6.S9 2.44 10.50 6.20 16.03 82 95 36.59 82.57 36. '20 39.90 61.74 62.l.;3 64.30 62 70 71.06 Ashes. 4.50 6.9S 4.66 1.47 8.80 8.66 6.40 T.83 13.23 2.S1 3.94 8.64 4.50 3.00 2.22 23.62 8.43 26.50 26.20 A complete description of the coals, such as may be found in the Report of Prof. Walter R. Johnson (Senate Document, 28th Congress, No. 386), and presented, in a condensed form, in Johnson's Edition of " Knapp's Chemical Technology," presents many other features affecting the qualities of the coals, and their adaptation to special uses. Such are — 1, their capacity for raising steam quickly ; 2, for raising it abundantly for the quantity used; 3, freedom from dense smoke in their combustion; 4, freedom from tendency to crumble in handling ; 5, capacity, by reason of their density, and the shapes assumed by their fragments, of close stowage ; and 6, freedom from sulphur. The last is an important consideration, affecting the value of coals proposed for use in th« 124 MINING INDUSTRY OF THE UNITED STATES. iron manufacture, sulphur, wliich is often present in coal in the form of sulphuret of iron, having a ver}' injurious effect upon the iron with which it is brought in contact when heated. It is again to be cautiously guarded against in selecting bituminous coals to be employed in steam navigation ; for by the heat generated by spontaneous decomposition of the iron pyrites, the eas- ily ignited bituminous coals may be readily set on lire. This phenomenon is of frequent occurrence in the waste heaps about coal mines, and large bodies of coal stored in yards and on board ships have been thus inflamed, involving the most disastrous con- sequences. In stowage capacity coals dif- fer greatly, and this should be attended to in selecting them fur use in long voyages. Tendency to crumble involves Avaste. Dense smoke in consuming is objectionable in coals required for vessels-of-war iu actual service, as it must expose their position when it may be important to conceal it. The following table was prepared by Prof Johnson to pre- sent some of the general results in these particulars of his experiments : — GENERAL SCALE OF UELATIVE TALDES FORMED FROM THE AVERAGES OF EACH CLASS OF COAL SUBJECTED TO TRIAL. 1. Maryland free-burning coals 1000 Pennsylvania anthracite 977 Pennsylvania bitnniinons 951 Virginia (James River) bituminous 850 Foreign bituminous 801 2. 8. 4. 6. 1000 395 880 682 986 1000 893 319 938 390 1000 914 757 242 948 730 741 331 948 1000 Column 1 gives the relative evaporative powers of equal weights of the coals ; 2, the same of equal bulks ; 3, their relative freedom from tendency to clinker ; 4, rapid- ity of action in evaporating water ; 5, facil- ity of ignition, or readiness with which steam is gotten up. The general results of experience in use, as well as of special trials systematically conducted upon a large scale, agree in these particulars — that while the bituminous coals are valuable for the greater variety of uses to which the}' are applica- ble, and especially for ail purposes requiring flame and a diffusive heat, as under large boilers ; and while they are quickly brought into a state of combustion, rendering the heat they produce more readily available ; the anthracites afford a more condensed and lasting heat, and are to be preferred in many metallurgical operations, especially where great intensity of temperature is required. And for many purposes, the free-burning, semi-bituminous coals, which combine the useful properties of both varieties, are found most economical in use. GEOLOGICAL AND GEOGRAPHICAL DISTRIBU- TION. The United States is supplied with coal from a number of coal-fields belonging to what are called the true coal-measures, or the carboniferous group, a series of strata sometimes amounting, in aggregate thick- ness, to 2000 and even 300o" feet, and whether found in this country or in Europe, readily recognized by the resemblance in the various members of its formation, its fossil organic remains, its mineral accompa- niments, and by its position relative to the other groups of rock which overlie and un- derlie it. The principal one of these fields or basins is that known as the Appalachian, which, commencing in the north-eastern part of Pennsylvania, stretches over nearly all the state west of the main Alleghany ridge, and takes in the eastern portion of Ohio, parts of Maryland, Virginia, Ken- tucky, Tennessee, the north-west corner of Georgia, and extends into Alabama as far as Tuscaloosa. Its total area, including a num- ber of neighboring basins, as those of the anthracite region to the east of the Alle- ghany ridge, which were originally a part of the same great field, is estimated at about 70,000 square miles. A second great basin is that which includes the larger part of Il- linois, and the western portion of Indiana and of Kentucky. Its area is estimated at about 50,000 square miles ; the coal is bitu- minous, and largely charged with oil. The third coal field, now known as the Rocky Mnuntain Coal Field, is the largest in the world, embracing an area in .Noith America of 1, '250,000 s(|uare miles of'w'hich 51.3, - "ii l" to U Gray mica- ^=^ '-'''■ - ''^i-l ceoua sandstone. ■ - • - «en, pnrole, • rown shale. I to & Limeatona. 7^40 to 80 Sandstone A ^ green shale. ssm 70 to 1.10 Slates, shale^ and sandstones. 3.6 Up'r Freeport coal. 4 to 7 Limestone. W to 40 Slate and slaty aauilstone. 3 Lower Freeport coat often cannel. 60 to 60 Massive sand, stone. 15 Slat«, shale, or sandi stone. 3 to4 Kittanningcoal 30 Slate, shale, oi siindatoiie. 0.4 to 6 Iron ore, 15 Ferriferous lime. 30 Slate and shale. ^* 3 to 4 Clarion coaL _, -^zi:""^ ;25 Slate and shale. i=t^' ' I . - I ■MKMSiaBMi to 2 Itrookvillacoal. ■77^ '^ih--- Mercer or lioneata co«l. ^ Coal 1.3 Coal 1 Cool 1.3 60 to 60 Massive sand- elone. S to 1h Brown A black slxile. 1 to4 15 Shale and sand- 16 Shale and sand- 15 Shale and saiid- 8 lone. 15 Shale and sand- stone. 100 Sandatone nnd conglomerate. 20 Slaty sandstone. 1 to 4 Sharon eoaL 131 bers of the column will then be brought into view at the base of the hills. Thus, at Pittsburg, the hills opposite the city afford a section of 300 or 400 feet, and the marked stratum is here the great coal-bed, which up the Alleghany river toward the north rises to higher and higher levels in the hills, and toward the south, up the Monongahela, sinks to lower levels, till it passes beneath the bed of the stream. By extending these obser- vations over the coal-field, it is found that the whole series of strata maintain their general arrangement, and the principal mem- bers of the group, such as an important coal- bed, a peculiar bed of limestone, etc., may be identifitd over areas of thousands of square miles. It is thus the sections have been pre- pared at many localities to complete the series, as presented on the opposite page, of the bituminous coal-measures of the ex- treme western part of Pennsylvania. The coal-beds introduced are those which are persistent over the greatest areas. Others occasionally appear in different parts of the column, and various other local difi'erences may be detected, owing to the irregularities in the stratification; thus sandstones and slates often thin out, and even gradually pass from one into the other. By their thinning out beds of coal separated by them in one locality may come together in another, and form one large bed ; and again, large coal- beds may be split by hardly perceptible di- visional seams of slate or shale, which maj- gradually increase, till they become thick strata, separating what was one coal-bed into two or more. The limestones, though generally thin, maintain their peculiar char- acters much better than the great beds of sandstone or shale, and are consequently the best guides for designating in the col- umns the position of the strata which ac- company them, above and below. The fire clay is almost universally the underlying stratum of the coal-beds. In the sections it is not distinguished from the shale-beds. The total thickness of all the measures, is from 2000 to 2500 feet. Such is the general system of the coal- bearinjr formation west of the Alledhan- ies. Every farm and every hill in the coal- field is likely to contain one or more beds of coal, of limestone, of good sandstone for building purposes, of fire clay, and some iron ore ; and below the surface, the series is continued down to the group of conglom- erates and sandstones, which come up around the margins of the coal-fields and define their limits. At Pittsburg this group, it is found by boring, as well as by the measurements of the strata in the hills toward the north, is about 600 feet below the level of the river. The coal-measures in this portion of the country are the high- est rock formation ; but in the western terri- tories beyond the Mississippi they pa.ss under later geological groups, as the creta- ceous and the tertiary. All the coals are bituminous, and the strata in which they are found are little moved from the horizontal position in which they were originally de- posited. They have been uplifted with the continent itself, and have not been subjected to any local disturbences, such as in other regions have disarranged and metamorphosed the strata. East of the AUeghanies, in the narrow, elongated coal-fields of the anthracite re- gion, a marked diflxjrence is perceived in the position assumed by the strata, and also ia the character of the individual beds. They evidently belong to the same geological se- ries as the bituminous coal-measures, and the same succession of conglomerates, sand- stones, and red shales, is recognized below them ; but the strata have been tilted at va- rious angles from their original horizontal position, and the formation is broken up and distributed in a number of basins, or canal- shaped troughs, separated from each other by the lower rocks, which, rising to the surface, form long narrow ridges outside of and around each coal-field. Those on each side being composed of the same rocks, sim- ilarly arranged, and all having been sub- jected to similar denuding action, a striking resemblance is observed, even on the map, in their outlines ; and in the ridges them- selves this is so remarkable that their shapes alone correctly suggest at once to those fa miliar with the geology of the country, the rocks of which they are composed. Upon the accompanying map, from the first vol. of the "New American Cyclopaedia," these ba- sins are represented by the shaded portions, and the long, narrow ridges which surround the basins, and meet in a sharp curve at their ends, are indicated by the groups of four parallel lines. Within the marginal hills the strata of the coal-measures, and of the underlying formations, while retaining their arrangement in parallel sheets, are raised upon their edges and thrown into undulat- ing lines and sharp flexures ; and the extrac- 132 MININO INDUSTRY OF THE UNITED STATES. tion of the coal, instead of being con- ducted by levels driven into tbe side of tbe hills, is effected by means of inclined shafts following down the course of the beds from the surface, or by vertical slopes sunk so as to cut them at considerable depths. The arrangement of the strata in its gen- eral features is represented in the ac- companying wood cuts. Fig. 1 is a section from Sharp Mountain, on the south side of the Mauch Chunk sum- mit mine, across this great body of coal, and the higher coal-beds of the formation repeatedly brought to the surface by their changes of dip, to Locust Mountain, which bounds the basin on the north. Fig. 2 is a sec- tion across the same basin at Ta- maqua, six miles west from Mauch Chunk mine. In this section it is seen how the coal-measures are sepa- rated into basins by the lower rocks coming up to the surface and forming anticlinal axes. Fig. 3 represents the position of single beds, as they occur among the slates and sandstones, and the manner in which they are some- times reached by means of a tunnel driven in from the base of the hill. The curved portion of the coal at the top is formed by the coal-beds at their outcrop becoming disinte- ' grated, and their fragments and de- composed smut being spread down the slope of the hill. The Eoman numerals, "IX," "X," "XI," "XII," in fig. 2, designate the lower forma- tions of rock, known respectively as the red sandstones (corresponding to the "Old Red Sandstone"); a series of gray sandstones ; one of red shales ; and lastly, the conglomerate. The dotted lines above and below the section mark the con- tinuity of the conglomerate beneath the base of the section and its original course above the present surface before this portion had been removed by diluvial action. The other «5| SO v^ *! tj t formations obviously accompany the con- glomerate with sirail.ir flexures. The same cause, that threw the strata into their inclined and contorted positions, no doubt changed the character of the coal by dispelling its volatile portions, converting it in fact into coke, while the pressure of the superincumbent beds of rock pre- COAL. 133 vented the swelling up of the material, as occurs in the ordinary process of producing coke from bituminous coal, and caused it to assume the dense and compact structure of anthracite. As the anthracite basins are traced westward, it is observed that the coals in those districts which have been less disturbed, retain somewhat of the bitumin- ous character; and if the continuity were uninterrupted between the anthracite and the bituminous coal-fields, there is no doubt that a gradual passage would be observed from the one kind of coal to the other, and that this would be accompanied by an amount of disturbance in the strata corresponding to the degree in which the coal is deficient in bitumen. AMOUNT OF AVAILABLE COAL. In estimating the quantities of workable coal in any district, several points are to be taken into consideration besides the amount of surface covered by the coal-measures and the aggregate thickness of all the beds they contain. Out of the total number of coal- beds, there are more or less of them that must be excluded from the estimate, on ac- count of their being too thin to work. The great depth at which the lower beds in the central parts of the Appalachian coal-field lie must probably prevent their ever being worked ; but for this no allowance is ever made in the estimates of quantities of coal. The most careful and complete computa- tions of this nature which have been made are those of Professor H. D. Rogers, and of Mr. Bannan in the Coal Statistical Register for 1871. From these sources we obtain the following estimates : EXTENT OF COAL-FIELD IN THE SEVERAL STATES POSSESSING THE COAL FORMATION. Sq. miles. Massachusetts and Rhode Island 100 Pennsylvania 12,656 Ohio 7,100 Maryland 550 Virginia 15,900 Kentucky 13,700 Tennessee 3,700 Alabama 6,130 Georgia 170 Indiana 6,700 Illinois 40,000 Michigan 13,350 Iowa 24,000 Missouri 21 ,329 Nebraska 84,000 Kansas 80,000 Arkansas 12,597 Indian Territory 40,000 Texas 30,000 New Mexico 20,000 Wyoming 20,000 Colorado 20,000 Montana 74,000 Dakota 100,000 Total 650,862 In the anthracite basins of Pennsylvania the number of workable beds varies from 2 or 3 to 25, according to the depth of the basin ; the average number is supposed to be 10 or 12. The maximum thickness of coal is in the Pottsville basin, and amounts to 207 feet. Rejecting the thin seams, the average thickness in the south anthracite field is reckoned at 100 feet; in the middle or north field at about 60 feet ; and the gen- eral average of the whole, 70 feet. The maximum thickness of the 15 or 16 coal-beds of the central part of the Appala- chian coal-field is about 40 feet, but the average of the whole basin is considered to be 25 feet. The basin extending over Illinois an^ into Indiana and Kentucky, contains in the last-named state 16 or 17 workable beds, with a maximum thickness of about 50 feet The average over the whole area is supposed to be 20 or 25 feet. The following estimates of the British. coal-fields are introduced for comparison. Extending these computations to Belgium and France also, the result of calculations of available coal supply, in 1870, are as follows : RELATIVE AMOUNT OF COAL IN THE SEVERAL GREAT COAL-FIELDS OF EUROPE AND AMERICA. Batio. Belgium (assuming an average thickness of about 60 fbet of coal) contains about 36,000,000,000 1 France (with same thickness) contains about 59,000,000,000 1.64 The British Islands (averaging 35 feet thickness) contain neariy 190,000,000,000 5.28 Pennsylvania (averaging 25 feet thickness) contains 316,400,000,000 8.8 The great Appalachian coalfield (including Pennsylvania, averaging 25 feet). 1,387,500,000,000 38.5 Coal-field of Indiana, Illinois, and western Kentucky (average thickness 25 ft). 1,277,500,000,000 35.5 The Rocky Mountain basin (averaging 30 feet) 3,739,000,000,000 10.29 All the productive coal-fields of North America (with an assumed thickness of 20 feet of coal, and a productive area of 200,000 sq. miles) 6,720,400,000,000 186. AH the coal-fields of Europe 8.75 The following table contains the yearly I States, from the commencement of the trtwie returns of the coal product of the United I in 1820 : 5?d Total consumption of Anthracite and Bituminous Coal in the United States. Illlfl I ililli § Aggregate of Bituminous mined in otlier portions of the United gg|gg| g States, not included in this table. .- - ' - - KO O ^11 SS 2 -OS 5 S3 3 "5 2T,298 88,110 136,278 6;i, 19;i 417,9,0 890,630 397.210 667,517 218,801 ^Z ^''"-•«-"'«-" 1 S5 "s'SBiiSil's uMimm i.gsp.p.p.si si.=3sS3§ls.,3 21,109.575 5,477.025 5,y31,63h 7, 552,99(5 7,849,085 7.810,810 7.976, IMU 9,026,682 67.248,670 10.236, 17t. 9.S76,017 9,706,771. 11,883,36;". 1 2,599, 9tl 12.110,92;: 15,455,581 15,b«fi,77; 17.545,0»i 18,308,31t ?:4 5" S « ^-^5~- TS- •• ifv "9 ti ■*t» a « oo a> PI m r- -f M in r» c - — t-31 --<3r;-».oo-f3 f5 "■• r|tJo V< M_?3 P5 CD to ?i ?f — sT -sT r;" 31 - ■•" m" .^ yi — " »;' sri" lO o" ■ ra o §SS§| -SSS34 !n 2 S ■» 5 ■* S 5 '-2 S Ir m" to » rt ^ — " p r' yi 31 - o w »-_ o >n * ■• .rt >- !C = M o •»■' c5 — rT 1-" m" q to r- •s-iouioiow^ o 2 ^ ?^ '^ ^ *" 0O-J3iaO31 — rtQW« H(Socewt-o«t- -»• g * — .r, * .J — ^ -rt ^ S* X 31 1-" « r-' k" 3« d^ <* — M t- e^ m t- lo S o — ^ '^ ^ 03 tSo ^ £ o O JS ol O — -I 9> te .]-> 3 I- i ?1 — ^ m - s 53 S jg S S 3 - g50.nqgaBr|i.O^ ■O3>r~lfil-Ol-Q«3v?« * ^. 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"(T o M ' ' o--oc°»-aSoi 00 Mf-» § IS i Is ssss J tcotJ* * Eo — (S ^ » iissgisSHM gill ■-Oc'ro I -^ 0> en V *■ W M JSa I siSSiSi C C" C^ * M "- *- * W ^ w ti Cr "O -I -I (T. O o"c 3S£8S3SiSi ■sEa 582S -1 »'»* — V; V-'ct o; w "y 'oi w O "en O O o Q V C' tr wMgift-JOOOatCi-'--' I 003*-too-j00tofaic fct^SS-'SSeiS — -J COUOO — SliSl ^ee.s o a: 2 o? ," «_« M » « _«e jj -J « _S — ►ct-JtngecjteCtiK £giS8S V> -« ee ^ o> to * CO M ■• CD m SVi"*. — "-J m'-jCT OS -•'"- oV*. p "(!■'-- "tc '-J C M-jjfc-j oo oi (» "- o *■ o I M0)i>--~ie«a»i-'OCi; II ft. - M a. « 6. a. tj(-;_"-» •oL^o&'**'-Jo3rM SKzo»c--j&oe(^oi wou>u£»u-S(cm Jc*(j.ojti*.WM Sags slS"5."sli5"s"a lillil'si'si's g'sS^SESglS Sl'a'ssaSsi 136 MINING INDUSTRY OF THE UNITED STATICS. TRANSPORTATION OF COAL TO MARKET. The first anthracite from the Schuylkill mines was brought to Philadelphia in wag- ons. The navigation of the river and canal was hardly practicable for boats previous to the year 1822; and though from that year anthracite was conveyed to Philadelphia and the trade continued to increase, it was not until 1825 that a large amount of coal could be transported by this route. The effect of these improvements was experienced in the transportation of 6,500 tons in 1825 ; in 1826 it increased to 16,763. As for successive years the trade steadily and rapidly increased in importance, the capacity of the canal proved at last insufficient for it, and the Reading railroad was laid out for its accom- modation, and constructed with a uniform descending grade from the mining region at Pottsville to the Delaware river. It was opened in 1841, and proved a formidable competitor to the Schuylkill canal, but the increasing trade has surpassed the capacity of both these routes. Other lines have been constructed, till now there are six or seven railroads engaged almost exclusively in the transportation of the anthracite and semi- anthracite coals from the mines. As seen by the table, the first shipments of anthracite were from the Lehigh region, two years before any were sent from the Schuylkill. The transportation was effected by arks or large boxes built of plank, and run down the rapid and shoal river with no little risk. To return with them was im- practicable, nor was this desired, for the arks themselves were constructed of the product of the forests, which in this form was most conveniently got to market. As the coal trade increased in importance, the Lehigh Coal and Navigation Company, to insure greater facility in running the arks, constructed dams across the shoaler places in the river, by which the water was held back, thus increasing the depth above. As the arks coming down the river reached one of these dams, the sluice gates were opened and the boats descended to the next dam be- low. At first two arks were connected to- gether by hinges at the ends ; subsequently more were tlms joined together, till they reached nearly 200 feet in length. In 1831 the slack-water navigation of the Lehigh was so far perfected, that it was used by canal boats ascending and descending through regular locks. Up to the year 1827 the transportation of anthracite to Mauch Chunk, nine mOes from the mines, was by wagons. The Mauch Chunk road, completed in May, 1827, was made with a descending grade, averaging about 100 feet to the mile, so tliat the loaded cars ran down by gravity. Each train car- ried down with it in cars appropriated to this use the mules for drawing the empty cars back ; and it is stated that after the animals once became accustomed to the rou- tine of their duties they could never be made to travel down the road if accidentally left behind. The trade before many years out- grew these increased facilities of transport- ing the coal, and it was found essential to return the empty cars by some more econom- ical method. On account of the heavy up- grade, locomotives, it was concluded, could not be advantageously employed, and hence a system of inclined planes and gravity roads was devised, by which the cars hoisted by stationary power to the summit of the planes and thence descending the gravity roads might be returned to the mines. In the accomjianying sketches a part of this ar- rangement of roads is exhibited. The high hill called Mount Pisgah, above the village of Mauch Cluuik, is the terminat- ing point at the Lehigh river of the long ridge called Sharp Mountain. The lower road seen in the sketch is called the loaded track. The cars come by this from the mines,and being letdown the inclined plane at its terminus, their loads are discharged in- to the great bins over the edge of the i iver. They are then hauled a short distance to the foot of the long plane that reaches to the summit of Mount Pisgah, and by the sta- tionary steam engine are drawn up in about six minutes to an elevation 850 feet above that at the foot. The length of this plane is 2250 feet. From its summit the empty cars run down the inclined road constructed along the south side of the ridge, and at the distance of six miles, having descended about 300 feet, they reach the foot of another in- clined plane at Mount Jefferson. This plane is 2070 feet long, rising 462 feet. The as- cent is accomplished in three minutes, and from the top another gravity road extends about a mile, descending 44 feet to the Sum- mit Hill village. From this point branch roads lead to the different mines in Panther Creek valley, and all meet again in the loaded track road by which the cars return to Mauch Chunk. The transportation of coal from Mauch Chunk was conduct id by the river and canal MOUNT PISGAH PLANE, MADCH CHUNK, Pa. COLLIERY SLOPE AND B. EAKER AT TUSCAROKA, PA. COAL. 139 MOUNT PISGAU PLANES AND THE GKAVITY RAILKOAD, MAUCH CHDSK. exclusively until the partial construction of the Lehiffh railroad in 1846. But it was not until its completion in 1855, that this began to be an important outlet of the coal region and a powerful competitor for the trade with the canal. A considerable amount of anthracite finds a market on the borders of Chesapeake Bay, being transported from the mines near the Susquehanna river by the Susquehanna tide- water canal, and by the Northern Central railroad. Its consumption is extending in this region by its use in the blast furnaces in the place of charcoal, for smelting iron ores, and the receipts of this fuel in the city of Baltimore are about one-si.xth of those of the semi-bituminous coals of the Cumber- land region, which are brought to the city by the Baltimore and Ohio railroad and the canal. The receipts during the years named below were as follows : 1857. Tons. Bituminous 443,782 Anthracite 267,334 1860. Tons. 897,684 325,129 18C9. 1870. Tons Tons. 1,882,619 1,717,075 270,240 305,494 701,116 722,813 2,152,909 2.022,571 The principal outlet of the Northern coal- field had been from 1829 to 1850 by the Delaware and Hudson canal. Since 1847 there have been taken every year to the Hudson river by this route from about 44",0U0 to 499,650 tons, except in 18.55, when the quantity was 565,460 tons. A number of railroads now connect this basin with the central railroad across northern New Jersey, and in other directions it is connected both by railroad and canals with the Erie railroad to the North and the Sus- quehanna river to the South-west. As large an amount of coal is now transported over each one of three of these lines as by the Delaware and Hudson canal. The various railroads and canals which have been constructed with especial refer- ence to the transportation of anthracite, are more than 48 in number, and have cost over $260,000,000. Most of them are pre- sented in the following table; of some of them only those portions which may fairly be counted as constructed for coal pur- poses : — 140 MINING INDUSTRY OK THE UNITED STATES. Name.s of railroads and canals. Canals. No. miles. Leliij^h Navigation , 87 L lii;;!! an i Susquehanna railroad and branches M incli Cluiiik and Siunnii: railroads Dijlaw.irv' division of the l\iiusylvania canal 43 B aver Meadow railroad and Ijranch H.i/.leton railroad Philadelphia and Krie railroad Summit railroad L'ihinli Valley railroad and branches Dclaw irj aid Hudson canal lOS Morris c mal 1 02 Tlu Schuylkill Navigation 108 II ading railroad and branches Sliamiikin and Pottsville Valley railroad and branch Little Scluiylkill railroad Dniville and I'ottsville railroad (44^ miles unfinished) Mine Hill and Schuylkill Haven railroad and branches Mount Carbon railroad and branches Port Carbon railroad and branches Schuylkill Valley railroad and branches Mill Creek railroad and branches Lvkens Valley railroad , Wieonisco canal 12 Swat ira railroad North Branch canal 163 Union canal and Pine Grove branch 90 Schuylkill and Susquehanna railroad Northern Central railroad Pennsylvania railroad and branches 338 Sns(|uehanna tidewater canal 45 York and Cumberland railroad Cumberland Valley railroad Franklin railroad Nesquchoning railroad Room Run railway Delaware, Lackawanna, and Western railroad Lackawanna and Bloonisburg railroad North Pennsvlvania Catawissa, WiUiamsjiort, and Erie railroad Elmira and Williamsport Pennsylvania Coal Company's railro.id New Jersey Central railroad Railroads by individuals Other coal railroads Railroads. No. miles, 193 36 38 20 288 2 238 153 34 32 34 143 13 14 30 32 215 55 142 44 81 45 28 6 116 82 66 68 78 63 1.34 120 1117 Total cost, $4,455,000 13,570,595 831,684 1,734,958 360,000 253,000 20,000,000 60,000 20,000,000 3,2.50,000 4,000,000 5,785,000 29,822,729 1,569.450 1,466,187 1,895,000 3,775,000 203,260 282,350 576,0.50 323,375 975,868 370,000 41,780 3,790,310 1 ,000,000 1,300,000 12,400,000 29,761,5.33 1,000,000 3,300,000 1,692,111 1,643,128 500,000 40,000 13,988,876 3,753,130 6,669,991 3,745,096 2,692,000 2,745,500 18,034,675 1,180,000 37,500,000 Total L096 3,746 $261,435,646 COAL MINING. Coal-beds are discovered and worked by different methods, varying according to the circumstances under which they occur. In regions where they lie among the piles of strata horizontally arranged, and passing with the other members of the group upon a level or nearly so through the hills, their exact position is often detected by their ex- posure in the precipitous walls of rock along the livers ; or it is indicated by peculiar in- dentations, known as "benches," around their line of outcrop, caused by their crumbling and wearing away more rapidly than the harder strata above and below them ; and again by the recurrence of springs of water and wet places at the foot of the benches, which point to an impervious stratum with- in the hill that prevents the water percolat- ing any further down ; and lastly, in the little gorges worn by the " runs," the beds are often uncovered, and loose pieces of coal washed down lead to their original source above. However discovered, the method of working them is simple. A convenient place is selected upon the side of a hill, and an ex- cavation called a drift, usually about four feet wide, is made into the coal-bed. The height of the drift is governed by the thick- ness of the coal-bed and the nature of the overlying slate. Miners sometimes work in drifts only 2^ feet high. Coal-beds three or four feet thick are very common, and are COAL. 141 worked without the necessity of removing the overhanging slate, unless it is too unsound to serve as a roof. Beds of ten feet thick- ness or more require much additional care over those of smaller size, both in removing the coal and supporting the roof; and in many cases it is found expedient to leave a portion of the bed, either at the top or bot- tom, untouched, especially if the upper lay- ers contain, as they often do, sound sheets of slate. At the entrance of the mines, and in general in all places where the cover is not sound, the materials overhead are prevented from falling by timbers across the top of the drifts, rudely framed into posts set up against the walls on each side ; and where the strata are very loose, slabs are driven in over tlie cross timbers and behind the posts. In such ground the coal cannot be excavated over large areas without leaving frequent pillars of coal and introducing great numbers of posts or props. But previous to abandon- ing the mine the pillars may be removed, commencing with those furthest in, and all the strata above arc thus allowed to settle gradually down. When drifts or gangways have been extended into the coal-beds far enough to be under good cover, branches arc commenced at right angles, and a system of chambers is laid fiut for excavation, leav- ing sufficient blocks or pillars of coal to pro- vide for the support of the overlying strata. Thus the work is carried on, ventilation be- ing secured by connections made within the hill with gangways passing out in different directions, and sometimes also by shafts sunk from the surface above, or, when those means are not practicable, by ventilating fans worked by hand, and thus forcing air through long wooden boxes which lead into the interior of the mine. Drainage is often a serious trouble, ami unless the strata slope toward the outlet of the mine, it can be ef- fected only by a channel cut to the required depth for the water to flow out, or else by the use of pumping machinery. When the strata lie nearly upon a horizontal plane, it is very common for a slight descent to be found from the exterior of a hill toward its centre, as if the beds of rock had been com- pressed and settled by their greater weight in the middle of the hill. In such positions the coal is extracted with much expense for drainage, and it is therefore an important consideration in judging of the value of coal- beds to ascertain whether or no the water will flow freely out from the excavations. In the bituminous coal-fields west of the Alle- ghanies, owing to the general distribution of the coal-beds above the level of the water- courses, it has not yet been found worth while to work any of the beds that are known to lie below this level. Coal must reach a much higher value before beds of the moderate size of those in that region can be profitably explored below water level. It is rare that bituminous coal is obtained by open quarrying. Where the beds lie near the surface, so that they might be un- covered, the coal is almost invariably in a rotten condition and worthless. Conse- quently one of the first points to be assured of in judging of the value of a coal-bed is that it has sufticient rock cover. After this may be considered the quality of the coal, its freedom from sulphur, etc., the sound- ness of its roof, and the facilities oft'ered for drainage and ventilation. The quality of a coal bed undergoes little or no change after it is once reached under good cover beyond atmospheric influences ; and hence no en- couragement can be given to continue to work a poor bed in hopes of its improving. Coal is excavated chiefly by light, slender picks. With one of these a miner makes a shallow, horizontal cut as far as he can reach under the wall of coal before hira, stretching himself out upon the floor to do this work, and then he proceeds to make a vertical cut extending from each end of that along the floor up to the roof. By another horizontal cut along the roof, a cubical block of coal is thus entirely separated from the bed, except on the back side which cannot be reached. The separation is completed by wedges driven into the upper crevice, or sometimes by small charges of powder. By this means blocks of coal are thrown down amounting to 70 or 80 tons in weight, and with the least possible loss by the reduction of por- tions of it to dust and fine coal. The cost of mining and delivering coal at the mouth of the mines, varies with the size and character of the beds. Under the most favorable conditions the horizontal beds of bituminous coal, as those in the hills oppo- site Pittsburg, have been worked and the coai delivered outside for H cents a bushel, or 45 cents a ton ; but in general the total expenses are nearly double this rate. In es- timating the capacity of production of coal- beds it is usual to allow a ton of coal to every cubic yard, and a bed of coal a yard thick should consequently contain a ton to 142 MINING INDUSTRY OF THE UNITED STATES. every square yard, or 4840 tons to the acre : but the actual product that can be depended on, after the loss by fine coal, by pillars left standing, etc., may not safely be reckoned at more than 3000 tons, or for every foot thick- ness of the bed 1000 tons. In the anthracite region, and in other coal districts where the beds are of large size and lie at various degrees of inclination with the horizon, the methods of mining differ more or less from those described. The anthra- cite beds frequently extend in parallel lay- ers longitudinally through the long ridges, dipping, it may be, nearly with the out- er slope, and descending to great depths below the surface. In such positions they are conveniently reached at the ends of the ridges and in the gaps across these, by a level driven on the course of the bed, and rising just enough for the water to drain freely. A level or gangway of this sort is the great road of the mine, by which all the coal is to be brought out in case other sim- ilar gangways are not driven into the same bed at points further up or down its slope. Unless the dip is very gentle, one at the lowest point should be sufficient. At dif- ferent points along its extension passage- ways are cut in the coal, directed at right angles up the slope of the bed, and as soon as one of them can be brought tiirough to the surface, a ventilating current of air is established, which may afterward be divert- ed through all the workings. The passage- ways together with other levels above divide the coal-bed into great blocks, and also serve as shutcs by which the coal excavated above is sent down to the main gangway. At the bottom of each shute a bin is constructed for arresting the coal and discharging it, as required, into the wagons which are run in beneath on the tracks laid for this purpose. Coal-beds in this position are also worked from the gangwaj' by broad excavations car- ried up the " breast" or face of the bed, suf- ficient pillars of coal from 12 to 25 feet long being left in either case to support the roof. These pillars usually occupy the most room just above the gangways, and on passing up between them, the chambers are made to ■widen out till they attain a breadth of about 40 feet, and tlius the breast is extended up to the next level. Props are introduced wherever required to support the roof, and the rubbish, slates, etc., are stacked up for tlie same purpose, as well as to get them out of the way. It often occurs that coal beds within the ridges can be reached only by a tunnel driven in from the side of the mountain across their line of bearing. Tunnels of this kind are sometimes extended till they cut two or more parallel coal-beds. Each one may then be worked by gangways leaving the tunnel at right angles and following the coal-beds, and the tunnel continues to be the main outlet of them all. When it is desirable to obtain the coal from the portion of the bed below the level of the gangway, preparations must first be made for raising the water, which may be done for a time by bucket and windlass, and as the slope is carried down and the flow of water increases, then by mining pumps worked by horse or steam power. The slope may commence from the exterior sur- face or from the lower gangway of a mine already in operation, and is made large enough to admit wagons, which ascend and descend upon two tracks extending down its floor. At the depth of 200 or 300 feet a gangw'ay is driven at right angles with the slope in each direction on the course of the bed, and from this the workings are car- ried up the breast as already described. Other gangways are started at lower levels of lOU feet or more each, dividing the mine into so many stories or floors. The coal above each gangway is sent down to its level and is received into wagons. By these it is conveyed to the slope, and here running upon a turn-table, each wagon is set upon the track in the slope and is imme- diately taken by the steam engine to the sur- face, another car at the same time coming down on the other track. Reservoirs are constructed upon the different levels to ar- rest the water, that it ma_v not all have to be raised up from the bottom, and the pumps are constructed so as to lift the wa- ter from the lower into the higlier reservoirs and thence to tlie surface. Many mines of this character are opened from the surface, one of which is represented in the cut of the " Colliery Slope and Breaker, at Tuscarora, Pennsylvania." An empty wagon is seen in this cut descending the track from the en- gine house down into the mouth of the pit, and through the end of the building pass- es the pump rod which by means of a vi- brating " bob" is turned down the pit and works by the side of the track. The men pass down into the mines of this character, sometimes by the wagons, and sometimes by IMiElLMIMN ISBEAKlXli UFF AND UlAlUXfl I'OAl,. UliAUlMl llUl L.JAl. H IILUK lUKUl. I.S NUT hUFFIC'IEN 1 I>K1'1U of VEIN Hi ADMIX ML'LE TEAMS. 143 ladders or steps arranged for the purpose I between the two tracks. Though the open- j ing, as represented, appears insignificant for an important mine, such a slope may extend several hundred feet in depth, and many gangways may branch off from it to the right and left, extending several miles un- der ground in nearly straight lines along the course of the bed. These, however, to se- cure ventilation, must have other slopes com- ing out to the surface, and at these may be other arrangements for discharging the coal and water. In extensive mines the gang- ways are made wide and capacious for the continual passing back and forth of the wag- ons drawn by mules. These animals once lowered into the mine are kept constantly under ground, where they arc provided with convenient stables excavated from the coal and rock. The men continue at work from eight to ten hours, and in well-ventilated mines the employment is neither very labo- rious, hazardous, nor disagreeable. The pur- suit has, however, little attraction for Ameri- cans, and is mostly monopolized by Welsh, English, Irish, and German miners. In the anthracite region there have been some remarkable instances of open quarries of coal. That of the Summit mine of the Lehigh is unsurpassed in the history of coal mining, for the enormous body of coal ex- posed to view. The great coal-bed, which appears to have been formed by a num- ber of bods coming together through the thinning out of the slates that separated them, arches over the ridge, forming the up- permost layers of rock, and dipping down the sides at a steeper angle than their in- clination. It thus passes beneath the higher strata. On the summit a thin soil, formed chiefly of the decomposed coal itself, covered the beds and supported a growth of forest trees. For several feet down the coal was loose and broken before the solid anthracite was reached. As the excavations were com- menced and carried on from this point, it appeared as if the whole mountain was coal. Shafts were sunk into it and penetrated re- peated layers of anthracite, separated by thin seams of slate, to the depth, in some places, of more than 55 feet. The work of strip- ping off and removing the covering of yellow and greenish sandstones and refuse coal was carried on, till the quarry had extended over about 50 acres, and on the north side the overlying sandstone, which had been steadily increasing in thickness, presented a wall of 30 to 40 feet in height. Over this area rail tracks were laid for removing the waste northward to the slope of the hill toward the Panther Creek valley ; and when the piles thus formed had grown into large hills, the rubbish was deposited in the spaces left after the coal had been removed. During the progress of this work the scenes presented were of the most picturesque and novel char- acter. The area laid bare was irregularly excavated into steps, upon which temporary rail tracks were laid in every direction. Up- on these the wagons were kept busily run- ning, some carrying off the coal, some load- ed with slates and waste, and others return- ing empty for their loads. Here and there stood huge isolated masses of anthracite, with their covering of sandstone, soil, and the relics of the original forest growth, reach- ing to the height of 50 or 60 feet, monu- ments of the vast amount of excavation that had been carried on, and presenting in their naked, vertical walls, fine representations of the extraordinary thickness of the bed and of the alternating layers of slate and coal of which it was composed. In the accompa- nying cut of the great open quarry of the Lehigh is represented one of these blocks. Gradually these masses disappeared as the miners continued their operations ; but in the boundary walls of the quarry there are still to be seen black cliffs of solid coal more than 50 feet high, and overtopped by a wall of vellow sandstone of nearly equal addi- tional height. L'nder these walls opera- tions have been carried on by the regular system of underground mining. From ten acres of the quarry it has been estimated that 850,000 tons of coal have been sent away, the value of which in the ground at the usual rate of 30 cents per ton, would be $255,000, or $25,500 per acre. Estimating the average working thickness of the coal in this part of the coal-field, from the Lit- tle Schuylkill to Nesquehoning, at 40 feet, which according to the report of the state geologist is not exaggerated, every availa- ble acre contains not less than 65,000 tons. The expense of extracting and preparing the coal from the great bed for market, is stated b)' the same authority to be 37i cents per ton for mining and delivering ready for breaking and cleaning. For this operation \2i cents; and for raising it to the summit and running it to Mauch Chunk 25 cents. Another locality where coal has been 144 MINIXO IXDUSTBY OF THE UNITED STATES. worked by open quarrying is at the mines of the Baltimore Company, near Wilkes- barre. Here, too, an iinmonso bed of coal was found so close to the surface that it was easily uncovered over a considerable area. As the overlying slates and sandstone in- creased in thickness, it was found at last more economical to follow the coal under cover ; and it was then worked after the manner of mining the bituminous coal-beds west of the Alleghany Mountains. Horizon- tal drifts 25 feet higli, which was the thick- ness of the bed, were carried in from the abrupt wall, several of them near together and scpai'ated by great pillars of coal left to support the roof The gangways were so broad and spacious that a locomotive and train of cars might have been run into the mine. Within they were crossed by a suc- cession of other levels, and through the wide spaces thus left open, the light of day pene- trated far into the interior of the hill, grad- ually disappearing among the forest of black pillars by which it was obstructed and ab- sorbed. In the anthracite region, several coal-beds of workable dimensions are often found in close proximity, so that when dipping at a high angle they are penetrated in succession by a tunnel driven across their line of bear- ing. Larger quantities of coal are thus con- centrated in the same area than are ever met with in the bituminous coal-field. In tjie northern coal-fields, lietween Scranton and Carbondale, tracts have brought .^8u0 or more per acre, and single tracts of 650 to 70U acres are reported upon by competent mining engineers as containing five workable beds, estimated to yield as follows — each one over nearly the whole area: one bed working 7 feet, ll,2(iO tons per acre; a sec- ond, working 8 feet, 12,8L)U tons per acre ; a third, 6 feet, 9600 tons per acre ; a fourth, the same ; and a fifth, 3 feet, 4800 tons — altogether equalling a production of 48,000 tons per acre, from which 20 per cent, should be deducted for mine w.-iste, pillars, etc. The anthracite as usually br(,)Ught out from the mines is most!}' in large lumps t)f incon- venient size to handle. In this shape it was originally sent to market, and wlien sold to consumers a man was sent with the coal to break it up in small pieces with a hammer. At present every miin; is supplied with an apparatus called a coal-breaker, which is run by steam power, and which crushes the large pieces of coal in fragments. It consists of two rollers of cast iron, one solid, with its surface armed with powerful teeth, and the other of open basket-work structure. Ihese revolve near together, and the coal, fed from a hopper above, is broken between them, and the pieces discharged below into another hop- per are delivered into the upper end of a re- volving cylindrical screen, made of stout iron wire, and set on a gentle incline. The meshes of this screen are of four or more degrees of coarseness. At the upper end the finer par- ticles only drop through ; passing this por- tion of the screen, the coarser meshes which succeed let through the stove coal sizes, next the " egg coal," and next the " broken coal," while the coarsest pieces of all, called " lump coal," are discharged through the lower end of the screen. Under the screen are bins or shutes, separated by partitions, so as to keep each size b}' itself Their floor slopes down to the railway track, and each bin at its lower end is provided with a trap-door, through which the coal is delivered as required into the wagons. The general plan of this ar- rangement is seen in the preceding wood-cut of the Colliery Slope and Breaker at Tusca- rora. The coal wagons are here run from the mine up into the top of the engine house, and thence through the building to the breaker at the upper end of the slope over the shutes. As the coal falls from the screen into these, boys are employed, one in each bin, to pick out and throw away the pieces of slate and stone that may be mixed with the coal. This they soon learn to do very thoroughly and with great activity ; and up- on the faithfulness with which their work is done depends in no small measure the repu- tation of the coal. USEFUL APPLICATIONS. While anthracite, by reason of its simple composition, is fitted only for those uses in which the combustion or oxidation of its carbon is required to generate heat, or else to extract oxygen from other substances, the bituminous coals, containing a greater variety of ingredients, serve to produce from their volatile ingredients illuminating gas and coal oils. These two subjects will be treated in distinct chapters, an . that upon the oils may properly include an account of the petroleum wells which have come within the past ten j'ears to furnish so large and important an item of our exports and Lome consumption. 1 ILLUMINATING GAS. 145 CHAPTER X. ILLUMIN-ATIKG GAS. The supply of artificial light in abun- dance and at little cost is one of the most important benefits which science and me- chanics can confer. It contributes not merely to phy.sical comfort and luxurious livinij, but supplies the means to multitudes of obtaining instruction during those hours after the cessation of their daily labors, vhich are not required for sleep, and which among the poor have in great measure been spent in dar-lvuess, on ac- count of the expense of artificial light. At the present day it is not unusual, in the less cultivated portions of the country, to see a farmer's family at night gathered around a blazing fire, and some among them seeking by its fitful light to extract the news from a public journal, or perhaps conning their school tasks, and making some attempts at writing or ciphering ; and when the hour to retire has come, the younger members dis- appear in the dark, and the more honored are favored with a home-made tallow can- dle, just sufficient for this use, and endura- ble on!)' to those who are unaccustomed to a more cleanlv and efficient method of il- lumination. With the advance of cultivation and learning, the demand for better light has increased the more rapidi}' it has been met. The sea has been almost exhaust- ed of whales for furnishing supplies of oil. The pork of the West has been largely con- verted by new chemical processes into lard oil and the hard stearine for candles ; and numerous preparations of spirits of turpen- tine, under the name of camphene and burn- ing fluid, have been devised and largely in- troduced with ingenious lamps contrived to secure the excellent light they furnish, with the least possible risk of the awful explo- sions to which those fluids are liable when their vapor comes in contact with fire. The bituminous coals have been made to give up the'r volatile portions — by one process to afford an illuminating gas, and by another to produce burning oils ; and the earth it- self is bored by deep wells to exhaust the newly-found supplies of oil gathered be- neath the surface at unknown periods by natural processes of distillation. The res- inous products of the pine tree are applied to the production of oil and gas for the same purposes; and peat, wood, and other 9* combustible bodies — even water itself — are all resorted to as sources from which the cry for " more light" shall be satisfied. The distillation of carbonaceous and bi- tuminous substances to obtain an illuminat- ing gas is a process, the practical applica- tion of which hardly dates back of the pres- ent century. The escape of inflammable gases from the earth, in different parts of the world, had been observed, and the phenomenon had been applied to supersti- tious ceremonials, especially at Bakoo on the shores of the Caspian. The Chinese are said to have applied such natural jets of gas to purposes of both illumination and heating; but the first attempts to light build- ings by gas distilled from bituminous coal were made about the year 1798 by Mr. Murdock in the manufactory of Messrs. Boulton and Watt, at Soho, England, and about the same time in France by a French- man named Le Bow. The Lonilon and Westminster Chartered Gas Light and Coke Company was incorporated in 1810, and Westminster bridge was lighted with gas, Dec. 31, 1813. The process was introduced into this country about the year 1821. Some attempts had been made at an earlier date, as in Baltimore according to some state- ments in 1816, and in New York four years before this. In the New York News of August 15, 1859, is an account of the ef- forts made by Mr. David Melville of that city to establish the use of coal gas in 1812. He lighted his own house with it, and then a factory at Pawtucket. He also succeeded in having it applied to one of the light- houses on the coast of Rhode Island, and for one year its use was continued with suc- cess. But on account of the disturbed state of the times and the prejudices against the use of a new material, the enterprise fell through. In 1822 the manufacture of gas was undertaken in Boston ; and the next year the New York Gas Light Company was incorporated with a capital of 81,000,- 000. The works, however, were not com- pleted and in operation until 1827. An- other company, called the Manhattan Gas Light Company, was incorporated in 1830 with a capital of S500,i;00, which has since been increased to §4,000,000. Such were the beginnings of this branch of manufac- ture, which has of late rapidly extended itself throughout all the cities and many of the towns "of the United States, having works in operation representing a capital of 146 MINING INDUSTRY OF THE UNITED STATUS. Within the last twenty ye:irs the use of g.is has increased with great r^ipidity througliuut the cities and towns of the United St:ites. In 18G0, the number of companies miinufac- turing g IS was, according to the stitements of the American Gas Light Journal, -loo, representing a capit