Lead, analyses of refined, 281 bullion, electrolytic refining of base, 270 bullion, Parkes process of desilverizing and refining, 263 bullion, softening of, 263 concentrate Joplin district, valuation of, 25 and copper smelting, the Bormettes method of, 215-223 deposits, southeastern Missouri, 18 Joplin district, 8 marketing, 3 -ore roasting, consideration of new processes, 135-138 Lead ore, average prices for, 27 ore, cost of smelting, 32 -ore roasting, theoretical aspects of, 133 ores, Galena, Kan., 24 ores, method of valuing, 26 ores, southwestern Missouri, 24 Park City, Utah, 8 -poisoning in old and new processes, 162-165 refining, electrolytic, 274 soft, Missouri, 25 smelting at Desloge, Mo., 42 smelting at Monteponi, Sardinia, 311 smelting and refining, cost of, 96 smelting in the Scotch hearth, 31 smelting in Spain, 306 smelting at Tarnowitz, Prussia, 41 source of in Missouri, 13 in southeastern Missouri, 7, 10, 17 sulphide and calcium sulphate, metallurgical behavior of, 139-143 total production United States, 5 yield from Scotch hearths, 39 Leadville, Colo., mines, 8 Lewis, G. T., 244 Lime-roasting of galena, 126 Lotti, Alfredo, 215 Messiter, Edwin H., 229, 240 Middleton, K. W. M., 31 Mine La Motte, 14 Minerals, briquetting of, 63 Mining methods in Missouri, 19-23 Missouri Smelting Co., 197 Mould, H. S., Co., 64 Murray smelter, Utah, 291 National plant of the American Smelting and Refining Co., 299 New Jersey Zinc Co., 246 Nutting, Mr., 256 Ore and Fuel Co., 63 different behavior of coarse and fine in lead smelting, 79 treatment in detail by the Huntington-Heberlein process, 150-155 Parkes process, cost of refining by, 99 Percy, Dr., 244 Perth Amboy plant of the American Smelting and Refining Co., 296 Petraeus, C. V., 24 Pfort curtain for furnaces, 82 Picher Lead Co., 197 Piddington, F. L., 263 Potter, Prof. W. B., 15 Pueblo lead smelter, 294 Smelting and Refining Co., 84 Pufahl, O., 38, 291, 294, 296, 299, 302, 304 Pyritic smelting without fuel practically impossible, 256 Raht, August, 251, 254 Refining, monthly cost of per ton of bullion treated, 100 Roasters, hand, and mechanical furnaces, average monthly cost of, 98 Roberts-Austen, W. C., 139 Salts, effect of crystallization of contained on concrete, 243 Santa Fe Gold and Copper Mining Co., 255 Savelsberg, Adolf, 122 Savelsberg process, 186-192 process, claims of in patent, 201 process contrasted with Huntington-Heberlein, 209 process, difference between and Huntington-Heberlein, 197 Savelsberg process the simplest, 132 Scotch-hearth method, permanency of, 195 Scotch hearths, 34 Schneider, A. F., 81 Seattle Smelting and Refining Works, 273