None
202-204 Down, on precipitation of copper, i. 206 Draught furnaces for smelting lead ores, i. 348, 349*, 350», 351 Drnmlummon Mill, Montana, gold amal- gamation by means of amalgamated plates, i. 797 Dry copper, see Gaarkupfer ** Drying " process in production of silver from work-lead, i. 500, 501*, 502 Duclos, proposal for improvements in zinc extraction, ii. 185 Diinnstein, production of, i. 117 ; com- position of, i. 118, 119 Dtirre, on Belgo-Silesian furnaces for zinc distillation used in Rhine pro- vinces, ii. 155 ; on production of zinc white, ii. 226, 230 n, 232 Dullo, on extraction of platinum, ii. 623 Dulong, on specific heat of gold, i. 753 ; on boiling point of mercury, ii. 250 Damping the ores, in copper heap-roast- ing, i. 31 Dust furnaces for roasting powdered lead ores, i. 328 Dyar, proposal for improvements in zinc extraction, ii. 185 Dye works, tin precipitated from waste water of, ii. 423 Dyscrasite, localities of, i. 466 E Karthy cobalt, ii. 598, 599 Kbennayer, on smelting roasted nickel matte, ii. 535; on refining nickel matte, ii. 540 et seq. Eckart Works, the, Mansfeld, manu- facture of sulphuric acid at, i. 155 Kdelmann, on production of a zinc-silver allo^ from work-lead, i. 561 ; on im- purities in commercial zinc, ii. 3 ; on refining zinc, ii. 178. Editha smalt works, Silesia, extraction of nickel by electrolysis, ii. 589 ; separation of nickel and cobalt at, ii. 602 Edmunds, on treatment of tin-cuttings, ii. 422 Edward Morrison Consolidated Mining Co. , the, at Zacatecas, i. 630 EgestorfiPs salt works, electrolysis of sulphate of zinc at, ii. 206 Eggertz, on cuprous oxide in copper, i. 2 Egieston, on effect of tellurium on copper, i. 4 ; on lake copper, i. 196 ; on the Cazo process, i. 618 7i ; on patio process, i: 636 n, 661, 671, 672 ; on the Stevenson pan, i. 658 n ; on Calif omian stamp mill, 681 ; on the Stetefeldt furnace, i. 687 ; on sizes of gold nuggjets, i. 757 ; on hydrau- lic mining, i. 766 et seq, ; on Hunt- ington gold amalgamation mills, i. 774 n ; on stamp mills, i. 784 et ntq. ; on Boss system of pan amalgamation, i. 796 ; on amalgamated plates, i. 797 ; on calcination of gold ores, i. 808 ; on chlorination of gold ore, i. 814; on inquartation, i. 852 n ; on gold refining, i. 856 n et aeq. ; on ex- ternally fired furnaces for calcination of cinnabar, ii. 276 n ; on Exeli fur- naces, ii. 280 71, 283-286 ; on Knox furnaces, ii. 290, 292 ; on Granzita furnaces, ii. 297 n-301 n ; on Tierras furnaces, ii. 303 ; on Livermore furnaces, ii. 305 ; on calcination of cinnabar with lime or iron, ii. 324 n ; on treatment of mercurial soot in California, ii. 332 n, 33471 Ehrenwerth, on production of zinc white at Bethlehem, ii. 233 n ; on nickel steel manufacture, ii. 507 ; on com- position of nickel mattes, ii. 526 ii ; on removal of copper from nickel matte, ii. 550, 553 Eich, on Krohnke process, i. 621 Eichhom,on theLiebig-Eichhom furnace, ii. 65 Eilers, on composition of slag from American lead smelting works, i. 346 Eissler, on Probert's furnace, i. 353 n Elbkupferwerk, the, near Hamburg, i. 152 Electrolysis, action on impure copper, i. 7 ; on cuprous sulphide, i. 1 1 ; on cupric sulphate, i. 12 ; on cuprous chloride, i. 12 ; on cupric chloride, i. 13 ; methods of oopp«r extraction by, i. 16 ; in desilverisation of copper ores, i. 23, 24 ; treatment of bottoms at Wallaroo by, i. 153; used in purification of coarse copper, i. 170 ; extraction of copper from ores, i. 249-257 ; from mattes, i. 257-260 ; from alloys, i. 260-273*, 274; refining of lead by, i. 433 ; of silver, i. 749- 751 ; parting of gold by, i. 873 876; of zinc, ii. 198-240 {nee under Zinc) ; extraction of cadmium by, ii. 248, 249 ; extraction of mercury by, ii. .343-344 ; extraction of bismuth from lead allocs by, ii. 365-368 ; extrac- tion of tm by, ii. 424-428 ; refining of tin by, ii. 428 ; extraction of anti- mony by, ii. 468-470 ; extraction of arsenic bv, ii. 479, 480 ; extraction of nickel by, ii. 588-591 ; extraction of platinum by, ii. 625 : extraction of aluminium by, ii. 635, 636, 645 664 Eliot, on impurities of zinc, ii. 2-4 Elkington, method of extraction of copper from its alloys, i. 260 702 GENERAL INDEX Elliot Works, the, South Wales, circular shaft furnaces used at, i. 103 Eisner, on volatility of gold, i. 752 ; on solubility of gold in potassium cyanide, i. 829 Ely pig copper, analysis of, i. 118 Embolite, localities of, i. 468 Emmens, on production of refined nickel matte, ii. 549 ; on extraction of nickel in the wet way, ii. 574 Enargite, localities, etc., i. 15 Engelhardt, on extraction of gold by bromine, i. 827 English process of copper smelting, i. 125-139 ; various operations, i. 125, 126 calcining the ores, i. 126-129 ; smelting calcined ores, i. 129-139 ; calcination of coarse copper, i. 139, 140 ; smelting coarse copper, i. 140-143; smelting white metal, i. 143-147 with repeated concentration processes, i. 147-152; examples of, i^ 152, 153 {nee Anglo-German process, Rever- beratory furnaces, etc. ) of extraction of lead by air-reduction, i. 289, 296-303 ; fum'ices for, i. 298*, 299, 300* ; localities used in, i. 300-303 English calciner for copper extraction, i. 127, 128*, 129 ; for lead extraction, i. 297, 298*, 299*, 300 ; for cupellation of argentiferous lead, i. 586 et aeq. ; for zinc distillation, ii. 94, 98, 99*, 100* Erdmann, on separation of cobalt and nickel, ii. 602 Ernst, on Nikitowka Mercurj' Works, ii. 341 n Erubescite, see Bomite, i. 14 Erythrine, see Cobalt bloom Escosura, on the Bustamente furnace, ii. 268 n, 273 Estufa, in patio process, i. 636 Eulytine, nee Bismuthic silicate Eureka Consolidated Works, Nevada, production of work -lead from Speiss, i. 496 ; Rozan process at, i. 518 ; Wheeler pan at, i. 659 ; calcination of gold ore at, i. 809 Eureka rubber, for gold amalgamation processes, i. 797, <98 Exeli furnace, ii. 279*-286 ; reverberator^' furnaces for extraction of mercury, ii. 309, 311, 312* ; furnaces for ore fines and soot, ii. 324 ; his soot- presses, ii. 332, 333* Faber du Faur, his furnace for distilla- tion of zinc scums, i. 540, 541*, 546 Fahlore, localities of, i. 15, 467 ; objects in roasting, i. 25 ; mercurial, ii. 250 ; stall-calcination of, ii. 264 Faraday,on solubility of gold in potassium cyanide, i. 829 Feather-ore, ii. 437 Fenwick, on extraction of tin by electro- lysis, ii. 427 Ferraris furnace, for burning calamine, ii. 26, 29* Ferric chloride, action on cupric oxide, i. 9 ; action on cuprous sulphide, i. 11 ; for formation of chloride of copper, i. 217-220 oxide, reduction of in zinc distillation, ii. 86 sulphate, action on cupric oxide, i. 9 ; action on cuprous sulphide, i. 10, 11 ; i*eduction of, in extraction of copper ores by German process, i. 19 ; reduction of, in extraction of copper by English process, i. 20 ; a solvent for copper, i. 205 ; formation of copper sulphate by aid of, i. 215, 216 Ferro nickel, ii. 506, 507 Ferrous chloride, action on cupric oxide, i. 9 ; action with hydrochloric acid on cuprous sulphide, i. II ; lixivia- tion of copper in solutions containing, i. 201-204 sulphate action on cupric oxide, i. 9 : action on cuprous suljphide, L 10 ; reduction of, in extraction of copper ores, i. 19 ; reduction of, in extrac- tion of copper by English process, i. 20 ; a solvent for copper, i. 205 sulphide action on cuprous oxide, i. 7 ; action on cupric oxide, i. 8 ; action on silicates of copper, i. 9 : action on cuprous sulphick, i. 10 ; reduction of in extraction of copper ores by German process, i, 19 ; re- duction by English process, i. 20 ; reduction of, in zinc distillation, ii. 86 Fiedler condenser, used with Exeli furnaces, ii. 282, 284* Fiedler- Randol condensers used with Exeli furnaces, ii. 283 Fine metal, see White metal Firmenich, on manufacture of artificial cinnabar, ii. 344 Fischer, F., on Smith's electrolytic method of tin extraction, ii. 427 Fizeau, on expansion of nickel, ii. 4S% Flach, on smelting rich zinc-scum with ferruginous slags, i. 549 Flapping, in scorification of lake copper, Flechner, his furnace for roasting ar- senical ores, ii. 559, 560*, 564r-566 Fleck, on inanu£Eicture of artificial cinna- bar, ii. 344 Fleitmann, his nickel manufactory at Iserlohn, ii. 496 ; on absorption by GENERAL INDEX 703 nickel of cyanogen, ii. 498 ; on nickel refining, ii. 593-595 Flintshire furnace for lead extraction, i. 297 Fluor Spar, reduction of in smelting lead ores, i. 344 Foam, see Skumnas Fohr, on refining of blicksilber, i. 596 ; on extraction of gold by bromine, i. 827 Fohster, electrolytical method of copper extraction, i. 268, 269 Fondon, used in Cazo process of silver" extraction, i. 619* Fonscoa, on the Rrobnke process, i. 624 Fontenay, on nickel- refining, ii. 595 Forehearths, furnaces with independent, see Spurofen; furnaces with fixed, see Sumpfofen ; furnaces without, nee Tiegelofen ; for lead-refining, i. 433 Fortschaufelungsofen, i. 68, 116 ; used at Friedrichshiitte, i. 303 ; for roasting lead ores, i. 33a-332», 333*, 387; for burning calamine, ii. 25-28*; for calcining zinc blende, ii. 43-45* ; for antimony extraction, ii. 448 Foullon, on crystallisation of tin, ii. 374 n Foumet, on reactions of lead sulphide, i. 278 Fraatz, on composition of refined Harz lead, i. 442 Francisci's furnace, for zinc distillation, ii. 195* Francke-Tina process, i. 700-702 Franklinite, localities of, ii. 15 ; zinc white produced from, ii. 226 Franz, on thermal conductivity of silver, i 456 ; of gold, i. 753 ; of zinc, ii. 2 Franz furnaces, ii. 273 Fraser and Chalmers, of Chicago, builders of O'Harra-Brown- Allen furnaces, i. 73 ; Brown-Horseshoe furnace, i. 76 ; Bnickner furnace, i. 80 ; Chilian mill, i. 622 ; their arrastras, i. 630* ; their stamp mills, i. 781-783* Frederick works, the, Silesia, extraction of zinc by electrolysis at, 221, 222 Freehold United Mine, Victoria, MacArthur- Forrest gold- extraction process at, i. 840 Freiberg lead furnace, see Pilz furnaces ; kilns, for calcining zinc blende, ii. 40 ; stall, copper roasting, see Well- ner's Stall Freieslebenite, i. 467 French process, of lead extraction by air- reduction, i. 290, 308-310 Fresenius, on production and refining of ** rohglas, ii. 492 n, 493 n ; on com- position of nickel-copper matte, ii. 540 Freshening of litharge, i. 423 ; of argen- tiferous copper, i. 497, 498 Friedrichshiitte furnace, the, i. 304*, 305 Frischen, sae Freshening Frue Vauners, for gold amalgamation mills, i. 774, 775*, 782, 784*, 785*, 788, 789, 797 Filzesd Dreifaltigkeit Mine, the, Boicza, Laszlo amalgamators at, i. 793 Furnaces, see under the names of the txirioiui kinds Furnace Calamine, see Calamine Fusion, in copper refining, i. 188 (^aar-heerd, refining of copper in the, i. 171, 172*, 175 Gaar-kupfer, or dry copper, i. 170 ; pro- duction of, i. 171, 172 Gaarmachen, or refining, i. 170 Galena, composition and localities of, i. 281, 282 extraction of lead from, i. 284-404 ; various smelting processes, i. 284- 286 air-reduction processes, i. 286-319 ; in reverberatory furnaces, i. 288- 290 ; the Carinthian process, i. 290- 296; the English process, i. 296- 303 ; the Tamowitz process, i. 303- 306 ; Bleiberg process, i. 306-308 ; French, or Brittany process, i. 308- 310; smelting in hearths, i. 310- 319 roasting and carbon reduction pro- cesses, i. 319-394 ; reduction of, in calcination of zinc blende, ii. 35 ; antimony in, ii. 437 Gandolfi, on the Bustamente furnace, ii. 26871 Gard, on separation of carbon from nickel, ii. 498 ; on e£fect of silicon on nickel, ii. 498 Gamier, discoverer of garnierite, ii. 508, 509 ; his process of nickel-refining, ii. 592, 595 Garnierite, solubility of, ii. 506, 508 ; extraction of nickel from, ii. 554 et seq. Garret, on composition of refined anti- mony from California, ii. 467 Gate's rock crushers, i. 787 n Gauthier's shaking table, i. 781 Gautier-Bouchard, on manufacture of artificial cinnabar, ii. 344 Gay Lussac tower, of English pyrites burners, i. 48 Geber, on cementation, i. 846 Gefassofen, see Mufiie furnaces Gellert, on the Barrel amalgamation pro- cess, i. 690 Grelstharp, on precipitation of copper by sulpnuretted hydrogen, i. 20d ; on production of chloride of copper in dry way, and furnace for, i. 230, 231*, 232* 704 GENERAL INDEX Genth, on extraction of nickel from roasted matte, IL 585 Genthite, ii. 509 George works, Dobschau, Silesia, com- position of spelter from, ii. 182 ; extraction of nickel from arsenical ores at, ii. 559, 562, 566, 569 ; ex- traction of nickel from speias, ii. 586 ; separation of nickel and cobalt at, ii. 602 George and May gold mines, W. Aus- tralia, direct cyanidation at, L 839 Georgi, on muffles for zinc-distillation, 130 n, 132 n German furnace, for cupellation of argen- tiferous lead, i. 568 tt atq. German gold and silver parting estab- lishment, gold parting bv electrolysis at, i. 875 ; treatment of silver scum for bismuth, ii. 364 (^erman process of copper extraction combined with concentration of matte, i. 120-125 (verman silver, effect of iron, sulphur and other impurities in, ii. 497, 498 ; composition of, ii. 506 Germania works, Utah, treatment of lead matte at, i. 383 Gersdorffite nickel glance, ii. 508 Gerstenhofer furnaces for copper extrac- tion, used at Kedabeg, tor pyritic copper fines, i. 52 , 53*, 54*, 55 ; for calcination of crushed copper mattes, i. 116; for calcination of coarse nickel, i. 139; for calcination pre- paratory to electrolysis of ores, i. 251 ; lead ores roasted in, at Frei- berg, i. 329 ; used at Freiberg for roasting lead ores, i. 387 ; for cal- cining zinc blende, ii. 39, 41, 42* Gibb, on precipitation of copper, i. 206 ; on production of chloride of copper in dry way, i. 221 ; furnace for, 230, 231*, 232* ; composition of ores treated, i. 233, 235 ; method of precipi- tation of copper from chloride, i. 245 ; on composition of cement copper, i. 246 ; on Claudet's process, i. 739 Gibbs-Gelstharpe furnace, for burning calamine, ii. 29, 51 Giesche, V., zinc works of, composition of zinc fume at, ii. 184 Gilchrist, on treatment of copper bottoms, i.l51, 152 Gill, on precipitation of copper by sul- phurettea hydrogen, i. 209 Gillon, proposal for improvement in zinc extraction, ii 185n Glasmachen, in the production of white arsenic glass, ii. 488 Glaser, proposal for improvement in zinc extraction, ii. 185 » (rlatte, see Litharge Globe smelting works, Denver, Colorado, O'Harra furnace for roasting lead ore at, i. 338 ; American lead furnace at, i. 352, 373-376*, 377* ; Hes fur- nace at, i. 354 Gmehling, on patera process, i. 720 h Godulla works, Silesia, composition of flue dust, containing cadmium from zinc calcination, ii. §48 Gold, extraction from copper, i. 16 ; at Wallaroo, i. 152, 153; at Argo, Colorado, 153 ; in copper " bottoms," i. 148 ; contained in copper ores of Rammelsbers, i. 156 ; process for ex- tracting gold from copper, i. 248; action in electrolysis of copper slimes, i. 262 in lead ores, i. 288 ; reduction in smelting lead ores, i. 343 ; in pro- ducts of blast furnace smelting of lead, i. 382 ; alloy of silver, i. 465 physical properties, i. 752, 753 ; che- mical properties, i. 753i-756 ; ores, i. 756 ; native gold, i. 756, 757 ; alluvial, i. 757 f compounds with tellurium, i. 758 ; auriferous metal- lurgical products, i. 758 extraction of eold, i. 758, 759; by washing, i. 760-763; by the dr> method, i. 763, 764; by combined wet and dry methods, i. 764-841 ; in the form of a gold mercury alloy, i. 764; amalgamation with- out previous crushing, i. 765-771 ; amalgamation during crushing of gold-bearing material, i. 771-789; amalgamation of previously crushed gold-bearing material, i. 789-802; treatment of gold amalffam, i. 802 tt ^eq, ; extraction of gold by means of aaueous solutions, i. 803, H04; Plattner process, i. 804-806 ; calcina- tion of the ores, i. 806-810 ; chlori- nation of the gold, i. 810, 819 ; preci- pitation of gold from chloride solu- tion, i. 819-826 ; extraction by means of bromine, i. 827 treatment of telluride gold ores, i. 827, 828 ; the MacArthur-Forrest process, i. 828-839; direct cyanidation, i. 839, 840 ; extraction by formation of alloys, i. 841 electrometallurgical extraction of gold, i. 841, 842 parting, I 842-876 in the dry way, i. 842-850; by sulphide of antimony, or by Gtu^ una Fhisji, i. 843, 844 ; by sulphur and litharge, i. 844, 845 ; by sul- phur alone, i. 845, 846 ; by salt or "cementotion," i. 846, 847; by chlorine gas or the Miller procejss, i. 847-850 in the wet way, i. 850-873 ; by nitric acid, i. 851-853; by sulphuric acid, or refining, i. 853-873. by electrolysis, i. 873-876 GENERAL INDEX 705 Gold — continued alloy of zinc and gold, ii. 12 ; alloys of bismuth and, ii. 352 ; in crude bis- muth, ii. 369-372; occurrence of arsenic with, ii. 476 ; separation from platinum, ii. 624, 625 ; effect of aluminium on, ii. 627-633 Golden Reward chlorination works, S. Dakota, precipitation of gold from chloride solution, i. 821 Goldschmidt, G., on treatment of mer- curial soot, ii. 335 Grore, on antimony pentachloride, ii. 434 Gossan, process of nickel extraction, ii. 674 Grabau, on aluminium chloride, ii. 630 ; his process of aluminium extraction, ii. 643 ; on electrolytic extraction of aluminium, ii. 657 Graham, on absorptiveness of gold, i. 752 Graham-Otto-Michaelis, on the chemical reactions of silver oxide, i. 458 Gramme machines, used in electrolytical extraction of copper from its alloys, i. 260 ; efficiency of, i. 265, 266 Grandfils, see Binon Granite mountain mill, the, at Philips- burg, Pan -amalgamation at, i. 697* Granulation of gold alloy, for refining, i. 857, 858 Granzita furnace, the, for mercury ex- traction, ii. 293, 294»-301 Greenockite, occurrence and localities of, ii. 242,243 Grillo furnace, for zinc calcination, i. 85 ; ii. 63, 66* Grillo zinc works, manufacture of sul- phur at, ii. 83 Grobe-Liirmann producers, the, used in zinc distillation furnaces, ii. 120 Grobemachen, in the production of white arsenic glass, ii. 488 Grosser, Dr., on the neutralisation of sulphur acids from calcination of zinc blende, ii. 55 Griitzner, on patio process, i. 637 Griitzner ana Kobler furnace for zinc distillatioii, ii. 101 Gruner, on hand-pattinsonising, i. 511 ; on mechanical • pattinsonising, i. 514 Gruson Co., the, of Magdeburg-Bruckau, electro-metallurgical method of cop- Sr extraction, i. 252, 253*-255*, 256 ; kszlo amalgamators manufactured at, i. 792* Giinther-Plattner furnace, for extraction of bismuth, ii. 356* Guttler, on arsenic at Ribas, ii. 476 Guibal fans, for cinnabar calcining fur- naces, ii. 277, 284, 285 Guido works, Chropaczow, Hasenclever furnaces for calcining zinc blende at, ii. 69* ; sulphur dioxide formerly manufactured at, ii. 76 VOL. II Guss und Fluss, gold-parting by, i. 843, 844 Guss-raffinad, i. 194, 197 Gutensohn, on treatment of tin cuttings, ii. 422 ; on extraction of tin by elec- trolysis, ii. 425, 427 Gutzkow, on gold-refining, i. 860, 867 Gypsum, reduction of in smelting of cal- cined copper ores, i. 88 H Haas furnace for calcining zinc blende, ii. 71, 72*, 73* Habet, on the Bleiberg process of lead extraction, i. 306 w Hacienda de Rocha Mine, the, at Guanaxuato, i. 643 Hacienda Nueva Mine, Fresnillo, patio- process at, i. 646 Hacienda Sauceda Mine, at Zacatecas, patio process at, i. 646 Hanisch, ttee SchK>der Hafod Works, see Vivian's Copper Works Hahn, on composition of slag from American lead smelting works, i. 346 ; on tuyeres of American lead smelting furnaces, i. 362; on solu- bility of the various chlorides, i. 461 ; on Augustin process, i. 706 ; on electrolytic extraction of aluminium, ii. 653; on Cowles' process of alu- minium extraction, ii. 664 n Hair pyrites, see Nickel pyrites Hair salt, ii. 634 Hall, Charles, on electrolytic extraction of aluminium, ii. 652 Hall, Joseph B., his electrolytical method of aluminium extraction, ii. 654 Hallet and Fry, Messrs., London, anti- mony reduction by, ii. 457 Hall Valley furnace for roasting lead ores, i.' 334, 338 Halsbriicke Works, Freiberg, lead smelt- ing at, i. 386-389 ; barrel amalgama- tion at, i. 689 Hamburg refinery, electrolytical method of extraction of copper from its alloys, i. 260 Hammergaarmachen, or toughening, i. 170 Hampe on specific gravity of copper, i. 1 ; absorptive power of copper, i. 2 ; on impurities in copper, i. 3-6 ; on action of hydrogen, and oxides of carbon, on cuprous sulphide, i. 11 ; on solubility of copper in copper sul- phide, i. 149 ; on refining of coarse copper, i. 173; on tough-poling, i. 191 , 192 ; on effect of copper on lead, i. 276 ; on composition of work -lead at Clausthal and Lautenthal, i. 403 ; on composition of lead matte, i. 403 ; on desilverisation of lead by zinc, z z 706 GENERAL INDEX i. 434 ; on composition of lead from Harz before refining, i. 435, 440 ; on refining blicksilber oy Roessler's pro- cess, i. 743; on Ziervogel process, i. 742; his method of purification of bismuth, ii. 373 ; on electrolytic extraction of aluminium, ii. 636, 655 Hanau Works, the, Utah, water-jacket furnaces at, i. 358 Hansamann, on manufacture of artificial cinnabar, ii. 344 Hardhead, composition of, at Altenberg, ii. 408 ; smelting of, ii. 413, 418 Hard-lead, a lead antimony allo}*^, ii. 436 Hard metal, formation of, i. 148 Hargraves, his method of antimony ex- traction, ii. 467 Harmet's furnace, for extraction of zinc oxide, ii. 190* Hartig, on treatment of zinc fume, ii. 187 Harvey's method of manufacturing ferro- nickel, ii. 507 Hatchett, on effect of antimony on gold, i. 753 Hasenclever muffle furnace, for copper calcining, i. 83, 84*, 85, 116; for sulphuric acid manufacture, i. 129 ; used for calcination of copper coarse metal, i. 139; used for smelting Rammelsberg copper ores, i. 156 ; lead ores roasted in, at Oker, i. 329 ; for calcining zinc blende, ii. 34 ; on neutralisation of sulphur acids from calcination of zinc blende, ii. 59 ; for calcination of zinc blende, ii. 67, 68* Hasenclever- Helbig furnaces, for copper extraction, disposition of the ores, i. 52, 56*, 57* ; for calcining zinc blende, ii. 59, 60*, 61* Hauch, on Hunt-Douglas process, i. 204 ; on the patera process, i. 718 Hauer on effect of cadmium on soft solder, ii. 241 7t; on extraction of nickel from slags, ii. 587 Haupt, on production of chloride of copper in dry way, i. 220 ; regenera- tors for Siemens gas furnaces, ii. 160 Haute-Feuille, on chemical reactions of silver oxide, i. 458 Hauzeur double furnace, the, for zinc- distillation, ii. 119*, 120 Hawel's nozzle, ii. 141* Hayden, eiectrolytical method of copper extraction, i. 269, 271, 272 Heap-matte, treatment of, for copper, in America, i. 33 Hearths for refining nickel matte, ii. 539 tt aeq. Heap-roasting of lump copper ores, i. 26-38 ; of fines, i. 37, 38 ; removal of bitumen by, i. 38 ; of copper matte, i. 112; dead-roasting in heaps, i. 113, 114 ; of copper pyrites, for sulphate, i. 213; of lead ores, i. 324, 326*, 328; of lead matte, i. 405; of calamine, ii. 21, 22; of zinc blende, ii, 39 ; of nickeli- ferous ores, ii. 516, 519 ; for refining coarse matte, ii. 531 ; of arsenical ores, ii. 559, nee Kernel roast- ing; H€€ «*V" method; normal, of copper ores, i. 26, 29-34; con- struction of heap, i. 29-31*, 32; arrangement for sulphur getting, i. 32*, 33 ; degrees of calcination, i. 33 ; consunvption of fuel, i. 34 Hearths, air reduction process for lea^l- extraction in, i. 31(f-319 Hebetine, sec Willemite Hecht, on clajr for vessels for zinc dis- tillation, li. 91 Hegeler and Matthiesen Zinc Works, the, Haas furnaces at, ii. 73; gas- fired zinc-distillation furnaces at, ii. 121, 122*, 123*, 129 Heine, on dead-roasting of copper matte in stalls, i. 115 Helbiff copper furnace, see Hasenclever Helmhacker, on reduction of antimony in reverberatory furnaces, ii. 451, 460 ; on refining of antimony in re- verberatory furnaces, ii. 463,* 465 Hemimorphite, localities of, it 14-15 Hempel, on condensation of zinc vapour, ii. 2 ; on the chemical reactions of zinc oxide, ii. 6 ; on condensing zinc vapours, ii. 185 e/ seq. Henderson, on production of chloride of copper in dry way, i. 220 Hendrie's translation of Theophilus, i. 845 u Hendy's Challenge ore feeder, i. 779, 788 Hennch furnaces, i. 92, 105, 106*, 168. 169 Herseus, on spitting of platinum, ii. 614 ; on extraction of platinum, iL 622 ; analysis of platinum from works of, ii. 625 Herapath, his method for purification of bismuth, ii. 372 Herbertz furnace, i. 349, 350*, 351 Hering, on extraction of antimony, ii. 444, 447 ; his volatilising-roasting, ii. 449, 454; on the precipitation method of antimony reduction, ii. 457, 460; on the refining of anti- mony, ii. 463 ; his wet method of antimony extraction, ii. 467 Hermann, his method of nickel ex- traction, ii. 576 Herrmann, on electrolysis of zinc ores, ii. 212, 219 H^roult, process of aluminium extraction, ii. 635. 647, 664 Herrenscfamidt, on extraction of cobalt, ii. 603 ; method of nickel extraction, ii. 578 GENERAL INDEX 707 Herreshof furnaces, i. 92, 93 ; improved water-jacket furnace, i. 92 ; fore- hearths of, i. 94, 107, 108*, 109* ; used at Nicholson Works, Brooklyn, i. 107, 108*, 109* ; for smelting nickel ores, ii. 523, 528 HeiTing, on neutralisation of sulphur acids from calcination of zinc blende, ii. 59 Herter, on extraction of nickel from slags, ii. 587 Hess, on extraction of platinum, ii. 623 Hesse, on touch -poling, i. 191 H&ssian crucibles for gold parting, i. 843, 852 ; extraction of bismuth by fusion of ores in, ii. 357 Hessite, i. 467 Heumann, on chemical reactions of sul- phide of mercury, ii. 253 Heycock, on melting point of silver, i. 45G71 High furnaces, for smelting calcined copper ores, i. 98 Hilarion Roux and Co., Marseilles, electrolytical method of copper ex- traction, i. 260 Hilgenberg, on composition of Harz lead after treatment by Pattinson's pro- cess, i. 425 Himly,on composition of refined antimony at Wilhelmshaven docks, ii. 467 Hintzerling, on electrolysis of zinc, ii. 215 Hirscli, Aaron, his works at Ilsenberg, extraction of zinc by electrolysis at, ii. 221 Hirzel, on composition of refined antimony from Hungary, ii. 467 Hocking's furnace, for roasting lead ores, i. 339 Hocking-Oxland copper furnace, i. 81, 82*, 83 Hopfner,on electro-metallurgical metho<ls of copper extraction, i. 16, 248, 249, 256, 257 ; on electrolysis of zinc, ii. 202, 217, 219; on extraction of nickel by electrolysis, ii. 591 Hoffmann, analysis of British Columbian crude platinum, ii. 617 Hofman, on reduction of magnesia in smelting lead ores, i. 343 n ; on water jacket tiirnaces for lead smeltins, i. 361) n ; on casting of refined lead, i. 453 n, 454 n, 455 n ; on zinc desilver- ising process, i. 530 ; on liquation of zinc scums, i. 535 ; on distillation of zinc scums, i. 542 ; on American fur- nace for cupellatiou of argentiferous lead, i. 588 n ; on stamp mill amal- gamation, i. 786 Hofmann, on patera process, i. 719 Holibaugh on the Bartlett process, ii. 23671 HoUunder, on Carinthian furnaces for zinc distillation, ii. 100 }i Homestake Mill, Dakota, stamp mills at, i. 786 Horn mercury, aee Calomel Horn pan, for Washoe pvocess, i. 657, 658*, 672 I'Hote, on action of sulphuric acid with pure zinc, ii. 5 ; on refining zinc, ii. 181 Howard, W. A., his amalgamator, i. 802 Howell furnace for silver extraction, i. 81 ; for roasting lead ores, i. 339 ; for chloridising roasting silver ores, i. 684*, 698 Hiittner and Scott furnaces for mercury extraction, ii. 293 et neq. ' Hugo Works, the, Silesia, Mieichen's nozzles for adapters used at, ii. 141, 142* Hungarian furnace, for copper refining, i. 176*, 177*, 178 ; used in Augustin process, i. 715*, 716*; for smelting nickel ores, ii. 564*, 566 Hungarian Mills, gold amalgamation in, i. 790-795 Hunt, Sterry, method of copper extrac- tion, i. 202-204 Hunt and Douglas process of copper extraction, i. 202-204, 207 Hunter, of Philadelphia, on treatment of tin cuttings, ii. 423 Huntington, on patio process, i. 637 Huntington Mill for gold amalgamation, i. 773*, 774, 775 Hut<;hius, on solidification of mercury, ii. 250 Hydraulic mining in California, i. 765 Hydrocarbons, absorbed by molten copper, i. 2 ; action on cuprous oxide, i. 7 ; action on cupric oxide, i, 8 Hydrochloric acid, a solvent for copper, i. 7 ; action on cuprous oxide, i. 8 ; action with ferrous chloride on cuprous sulphide, i. 11 ; solvent for cuprous chloride, i. 12 ; used for lixi\aation of copper, i. 207 ; action on lead, i. 276 ; on silver, i. 457 ; on silver sulphide, i. 460 ; on gold, i. 753 ; on zinc, ii. 5 ; on mercury, ii. 251 ; on bismuth, ii. 348 ; used m extraction of bismuth, ii. 363; action on tin, ii. 376 ; used in purifi- cation of tinstone, ii. 382, 390 ; action on antimony, ii. 431 ; on nickel, ii. 499; used in extraction of nickel, ii. 582 ; action on arsenic, ii. 472 ; on cobalt, ii. 597 ; on alu- minium, ii. 628 Hydrogen, absorbed by molten copper, i. 2, 5, 6 ; action on cuprous oxide, i. 7 ; on cupric oxide, i. 8 ; on cuprous sulphide, i. 11 ; on silver sulphide, i. 458 ; on zinc oxide, ii. 7 ; on zinc sulphide, ii. 10 Hydrozincite, localities of, ii. 15 z z 2 708 GENERAL INDEX Llaho Mill, California, amalgamation of gold in pans, i. 795 ; with amalga- mated plates, i. 797 ; Atwood's amal- gamators at, i. 799 Idrialine, ii. 2r)5 Idrialite, ii. 255 Idrian furnaces, for calcination of cin- nabar, ii. 273-276 Idrian -Hahner furnaces, ii. 315* lies, on composition of slag from American lead smelting works, i, 346 ; his furnace at Denver, i. 354 Illing, on zitic desilverising process, i. 529 Illinois Zinc Co., the, at Peru, Siemen's gas-fired zinc distillation furnaces used by, ii. 123, 124* Indigo copper, see Covellite Inquarlation, or gold-parting by nitric acid, i. 851-853 Iodine, action on bismuth, ii. 348 lodite, localities of, i. 468 Iridium, effect on gold, i. 753 ; occur- rence of, ii. 616 Iron, action on copper, i. 3 ; on silicates of copper, i. 9 ; on cuprous sulphide, i. 11 ; on cupric sulpnate, i. 12; on cuprous chloride, i. 12; on cupric chloride, i. 12, 13 ; reduction in 6es- semer process of copper smelting, i. 21 ; treatment of copper ores rich in, i. 24, 26, 29 ; process of slagging off in smeltine calcined copper ores, i. 86-91 ; smelting of cupriferous pyrites in United States, i. 91 ; furnaces adapted for smelting copper ores with, i. 93 ; precipitation of cop- per by, i. 205, 206 ; formation of copper sulphate by heating pyrites with nitrate of iron, i. 215 ; used in precipitation of copper from its solu- tions, i. 241 et 8tq. ; action in elec- trolysis of copper slimes, i. 262, 263 ; reactions with lead sulphide, i. 279 ; reduction in smelting of lead ores, i. 341 , 345 ; in products of blast-furnace-smelting of lead, i. 381 ; in various lead ores, i. 386 et mq. ; action of in iron-reduction - process of lead extraction, i. 394 et stq. ; elimination of in refining of lead, i 432 et aeq. ; action on sUver sulphide, 459 ; reduction of in gold- refining, i. 855 ; present in com- mercial zinc, ii. 3 ; action with zinc oxide, ii. 8 ; action with zinc sul- phide, ii. 10 ; present in zinc blende, iL 13 ; extraction of mercury by heating with cinnabar, ii. 323-329 ; effect on tin, ii. 375 ; separation from tin, ii. 303 ; alloys of tin and, ii. 407 ; effect on nickel, ii. 497, 498, 500-503 ; alloys of nickel and. ii. 506, 507 ; extraction of nickel from ores containing, ii. 51 1 et seq. : removal from nickel matte, ii. 530 : removal from copper matte, ii. 544 ; effect on aluminium, ii. 627, 631 arsenide of, ii. 476 nitrate of, action on cuprous sulphide, i. 10 oxides of, reduction of in extraction of copper ores by Gei*man process, i. 18, 19 ; reduction of in EnglLsli process, i. 20 ; smelting of copper ores containing, i. 90 pyrites, action on cuprous sulphide, L 10 (For compounds of Iron, «ce under Ferric ; Ferrous) Iron-reduction process for lead extrac- tion, i. 394-412 ; in the Upper Harz, i. 397-404; smelting lead matte, i. 404-409 ; combined with the roasting and carbon reduction process, i, 409 412 ; combined with smelting of oxi- dised ores, i. 412, 413 Isabella Works, Dillenburg, stall-roast- ing of nickeliferons ores at, ii. 518, 520 ; roasting in shaft furnaces, ii. 520 ; smelting nickel ores, iL 525 e/ seq. ; refining matte at, ii. 539 et seq., 582 Jacquelain, on impurities in oonmiercial zinc, ii. 4 Jaczinsky, his furnace for calcination of cinnabar wich lime or iron, ii. 328*, 329* James, S. , Jr. , on copper slag produced in Henrich furnace at Clifton, Arizona, i. 169 Janiesonite, i. 283 ; ii. 437 Janda, on composition of mercurial soot at Idria, ii. 330 n, 334 n; on acid water from the condensers, iL 336 ;. on composition of Idrian ores, ii. 337 Janin, on tne MacArthur-Forrest gold- extraction process, i. 828 n, 829 Jay Gould MiU, Montana, Boss s^-stem of pan amalgamation at the, i. 796 Jenkins and Smith, on chemical re- actions of lead sulphide, 1. 278 n Jensch, on sulphur in zinc blende, ii. 34 Johnson, on thermal conductivity of silver, i. 456 ; of gold, L 752 ; on the expansion of zinc by heating, ii. 2 : on thermal conductivity of zinc, ii. 2 ; of mercury, iL 250 Johnson, Matthey and Co., Hatton Garden, London, inquartatiou prac- tised by, i. 851 ; Australian bismuth ores treated by, iL 353 ; extraction of arsenic froni bismuth by, ii. 370 : antimony reduction by, ii. 457 ; GENERAL INDEX 709 analysis of refined platinum from, ii. 625 Jordan, on treatment of blicksilber for gold, i. 844 n ^ossa and Kumakoif on the (iavrilov works at Tomsk, i. 484 ^uhel, designer of the MaWtra furnace, i. 58 J^ulius works, Astfeld, nee Herzog Juliushutte (in the (geographical index) <rumbo hearth, used in air reduction process of lead extraction, i. 311, 315, 316*, 318 Jrnige, on effect of bismuth on lead, i. 276, 431 ; on zinc desilverising pro- cess, i. 529 Jnngk, on separation of carbon from nickel, ii. 498 .Jurisch, his improved Maletra furnace, i. 61, 62*, 63* K Kamienski, method of nickel extraction, ii. 577 Karargahake Works, New Zealand, MacArthur-Forrest gold extraction process at, i. 840 Karmarsch, on the tenacity of cast zinc, ii. 1 Karsten, on effect of carbon on copper, i. 5 ; on action of lead with cupric oxide, i. 8 ; on over-poled copper, i. 192; on leading silver matte, i. 487 ; on copper-dissolving and smelt- ing process, i. 495 ; on patio process, i. 637 ; on specific gravity of zinc, ii. 1 ; on the impurities in zinc, ii. 2-4 ; on the precipitation method of antimony reduction, ii. 457 Keil, his furnace for zinc distillation, ii. 101 ; proposal for improvement in zinc extraction, ii. 185 n Keith, on lead refining, i. 433 ; on electro-metallurgical methods of silver extraction, i. 750 ; on extrac- tion of tin by electrolysis, ii. 425, 426 Keller, (iaylordandCole,"Messr8., copper works at Butte, Montana, i. 63 Kerargyrite, see Horn Silver Kerl, on pyrites burners for calcining zinc blende, ii. 40 ; on calcination of cinnabar with lime or iron with- out air, ii. 324 n ; on liquation pots for antimony reduction, ii. 440 n ; on extraction of arsenic at Reichenstein, ii. 479 71 ; on production of white arsenic Klads,ii. 490 n ; on composition of nickel mattes, ii. 536 n ; on smelt- ing roasted matte, ii. 535 ii ; on pro- duction of crude nickel, ii. 552, 569 Kern, analysis of Nischni-TagiLsk crude platinum, ii. 617 Kernel roasting of copper ores, i. 28, 34, 3o*-37* ; objects of, i. 34, 35 ; localities practised in, i. 36 ; ar- rangement of heap, i. 37* ; products, i. 37 Kiliani, on electrolytical methods of copper extraction, i. 261, 264; on electrolysis of zinc, ii. 199, 200, 201 ; from alkaline solutions, ii. 217 ; on electrolytic extraction of aluminium, ii. 652 Kilns, difference between pvrites burners and, i. 45 ; objects of, i. 49 ; con- struction of, at Freiberg, i. 50*, 51* ; at Oker, 51*, 52 ; for roast- ing lead ores, i. 328, 329; for heating zinc distillation retorts, ii. 109, 110* Kingzett, on precipitation of copper, i. 206 Kirchhoff, on manufacture of artificial cinnabar, ii. 344 Kiss, on precipitation of gold from chloride solution, i. 826 Kiss process, the, of silver precipitation, i. 732, 733 Kittler, on extraction of zinc by electro- lysis, ii. 219 Kjellin, »ee Cassel Kleemann, proposal for improvement in zinc extraction, ii. lS5n Kleenianirs a<lapters, ii. 134, 135* ; zinc fume from, ii. 184 ; cadmium ex- tracted from flue-dust caught by, ii. 244, 245 Kleiner-Fiertz, methorl of electrolytic extraction of aluminium, ii. 655 Knab, on smelting of oxidised and acid copper ores at Chessy, i. 167 ; on calcination of copper pyrites for sul- phate, i. 212, 213 H ; on precipitation of copper, i. 241 n ; on specific gravity of lea<l, i. 275 ; on materials for manufacture of zinc-distillation re- torts, ii. 106 ; on the reduction of antimony in reverberatory furnaces, ii. 453 » ; pot furnaces, ii. 456 ; on extraction of nickel from roasted matte, ii. 585 Knapp, experiments on action of silica with cupric oxide, i. 8 ; on action of water-vapour on cuprous sulphide, i. 11 Kniest, i. 121 Knorre, on composition of nickel smelted at Altena, ii. 594 Knottenerz, smelted at Mechemich, i. 390 Knox furnace, for extraction of mercurv, ii. 289, 290*-293 -pan, for Washoe process, i. 665 , used in gold amalgamation, i. 795 Knox-08lx>rne condensers, ii. 291, 305 Knut Styffe, on melting point of nickel, ii. 497 ; on nickel smelting at 710 GENERAL INDEX Sudbiin', ii. 5*29 n ; on prorlaction of enisle nickel, ii. ^2 Koehler, hi« furnace with movable work- ing chamWrH for calcination of zinc blende, ii. 74 (^<^. f iriitzner) Koepp an<l Co,, methorl of antimony extraction, ii. 4(58, 469 Kollmann, on tennile strength of nickel, ii. 496 Kopp, on Kpecific gravity of mercury-, li. 25(> (M^e Reineck'en-Ponsgen &) Korting'8 injector, used in Hunt -Douglas procesH, i. 2fJ3 Kosmann, on neutralisation of sulphur acids from calcination of zinc blende, ii. 55 ;/, 57 ; on composition of zinc fumes from Lipine,'ii. 183 ii, 184 n; on extraction of cadmium, ii. 247, 248 Krcltz-kupfer, or dross copper, i. 180 Kremnitz United Caroli- and Stadt- Mines, Huntingtoti gold-amalgama- tion mills used at, i. 776 Krohnke process of silver extraction, i. 620-625 Knimmofen, i. 96, 351, 364 Kttnzel, C, on impurities in commercial zinc, ii. 4 ; on treatment of tin- cuttings, ii. 424 ; on production of crude nickel, ii. «552 ; on separation of nickel from cobalt, ii. 602 Kiistel, on patera process, i. 719 Kuhlemann, on refining lead, i. 441 ; on silver extraction processes at Freiberg and Altenau, i. 610 Kupffer, on melting point of tin, ii. 375 Kupferauflosungssciimelzen, i. 495 Kupferkamme works, Mansfeld, manu- facture of sulphuric acid at, i. 155 Kupfemickel, ii. 507 Kupferscliiefer, removal of bitumen from, by heap-njasting, i. 38 ; formation of trisilicates in smelting of, i. 89 ; older furnaces for smelting, i. 97, 98 ; process of smelting, at Mans- feld, i. 1 10 ; composition of, i. 154 ; desilverisation of, i. 154, 155 Kuschel and Hinterhu1>er's furnace for calcining zinc blende, ii. 51 Kuss, on the Bustamente furnace, ii. 26811,272 I^ (iranja mine, Zacatecas, patio process at, i. 646 IwAma, in patio process, i. 631 Lambotte, on treatment of tin-cuttings, ii. 424 l^mcros, see Cajetes Lanipadius, on treatment of blicksilber for gold, i. 84472 ; on composition of tin slags from Altenberg, ii. 407, 408 ; on composition of liquation - dniKs from Altenwald, ii. 414 ; on HItnition of tin, ii. 416 I^na philosophica, ii. 4 Lancauchez, se^ Mnller Landolt and Mallet, on fusibility of arsenic, ii. 471 Landsberg's patent zinc scum distiller, L 543,546 Lang, Herbert, on copper matte smelting, i. 167 Lange, on electrolysis of zinc, ii. 216 Langer, on Bustamente furnaces, ii. 273, 276 » Langer furnace, for extraction of mer- cury, ii. 286, 287*-289* Laroche', his method of nickel extraction, ii. 576, 577 Laroque, on treatment of tin -cuttings. ii. 422 Larranaga, introducer of Idrian furnace into Almaden, ii. 273 Laske, on zinc desilverising process at Friedrichshiitte, i. 532 Laszlo amalgamators, the, i. 790, 7^* Laur, on Krohnke process, i. 621 ; on the patio process, i. 633 u, 635 n, 637, 646 Lavadero, the, in patio process, i. 643, 644* Leaching, of copper solutions, i. 208; after calcination of copper pyrites for sulphate, i. 213-215; for chloride, i. 228*, 229. 230; in solution of copper as chloride, i. 237, 238 ; pre- rratory to electrolysis, i. 251 , used in displacement of gases from copper, i. 2; melted with copper, i. 3 ; action with cupric oxide, i. 8 ; action with cuprous sulphide, i. 11 ; in copper ores, i. 24, 26 ; in Ram- melsb^rg ores, i. 45, 156, 157 ; reduc- tion of, in smelting calcined copper ores, i. 87 ; Pilz furnaces for smelting, i. 98 ; contained in kupferschiefer. i. 155 ; action in electro! vsis of cop- per slimes, i. 262, 263 phj'sical properties, i. 275; chemical properties, i. 276 ; chemical reac- tions of compounds, i. 276-281 ; allovs, i. 281 ; ores i. 281-283 : production of metallic lead, i. 283, 284 ; extraction from ores, i. 284-494 extraction from Galena, i. 284-404, see under Galena air-reduction process, i. 286-319 ; col- lecting the products for paint, i. 314, 318 roasting and carbon reduction process, i. 319-394 ; smelting calcined ores, i. 339-394; lead ores of Freiberg, i. 386-389 iron reduction process, i. 394-409 ; combined roasting and reduction, and iron reduction processes, i. 409- 411 ; combined iron reduction pro- cess and smelting of oxidised ores, i. 412-416 GENERAL INDEX 711 Lead — continued smelting of lead sulphate, i. 416-418 ; of plumbiferous metallurgical pro- ducts, i. 418-422; of bye-products, i. 422-430. refining of lead, i. 430-453. casting of refined lead, i. 453-455 ; composition of refined American market lead, i. 455. action on silver sulphide, i. 459 ; alloy of silver and, i. 464 ; baths, for production of silver-lead alloy, i. 473; production of ■ silver-lead-zinc alloy, i. 522 et seq. production of silver by means of, see wnrfcr *work-lead effect on gold, i. 753-755; alloyed with gold for dry extraction, i. 763 ; reduction of in gold-refining, i. 855 present in commercial zinc, ii. 3 ; action with zinc, ii. 5 ; action with zinc sulphide, ii. 10, 11 ; alloy of zinc and, ii. 12 ; electrolysis of silver-lead alloys, ii 221 ; prepara- tion of the mixture of sulphate and oxide of lead and oxide of zinc, ii. 235-237 action with bismuth, ii. 348, 349 ; alloys of bismuth and, ii. 351, 352; treatment of alloys with bismuth, ii. 385 ; by electrolysis, ii. 365-368 ; extraction of, from crude bismuth, ii. 372 effect on tin, ii. 375 ; lead from Frei- berg, containing tin, ii. 419 ; alloys of antimony and, ii. 436, 437 Lead antimoniate, chemical reactions of, i. 281 •ashes, treatment of, i. 430 black-lead ore, i. 282 carbonate, chemical reactions of, i. 280 ; extraction of lead from, i. 284 ; smelting of, i. 413-416 chloride, chemical reactions of, i. 281 -matte, composition of, from blast furnace process, i. 381, 382 ; treat- ment of, i. 383-385 ; composition of, at Clausthal and Lautenthal, i. 403, 407 et seq. ; smelting of, i. 404-409 ; composition of at Alexisbad, i. 410, 411 ; smelting of, i. 420, 421 monoxide, chemical reactions of, i. 