Statistics of Mines and Mining in the States and Territories West of the Rocky Mountains: Being the ... Annual ReportU.S. Government Printing Office, 1872 |
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... Smelting silver ores . 432 XVI . List of stamp - mills 461 PART III . Miscellaneous ...... 481 Chapter XVII . Narrow - gauge railways 483 XVIII . The mining law .... 490 XIX . The geographical distribution of mining districts .. XX ...
... Smelting silver ores . 432 XVI . List of stamp - mills 461 PART III . Miscellaneous ...... 481 Chapter XVII . Narrow - gauge railways 483 XVIII . The mining law .... 490 XIX . The geographical distribution of mining districts .. XX ...
Seite 2
... smelting operations of Eureka , have added heavy sums to the bullion - product of the State . At Austin , Mineral Hill , and elsewhere the Stetefeldt furnace has been steadily in operation , suc- cessfully treating , at a great saving ...
... smelting operations of Eureka , have added heavy sums to the bullion - product of the State . At Austin , Mineral Hill , and elsewhere the Stetefeldt furnace has been steadily in operation , suc- cessfully treating , at a great saving ...
Seite 20
... smelting , which forms the greater portion of the ore of the St. Lucas mine , contained per ton $ 93 60 in silver . B. A highly oxidized ore , containing silver - copper glance , forming an average of 1 foot in width of ore , 30 feet ...
... smelting , which forms the greater portion of the ore of the St. Lucas mine , contained per ton $ 93 60 in silver . B. A highly oxidized ore , containing silver - copper glance , forming an average of 1 foot in width of ore , 30 feet ...
Seite 22
... smelting . This dressing is rendered easy by the great difference in the specific gravity of the ore and the barren rock . The most prominent mines are , the Union , San Ignacio , Freiburgh , San Felipe , St. Lucas , and Belmont ; about ...
... smelting . This dressing is rendered easy by the great difference in the specific gravity of the ore and the barren rock . The most prominent mines are , the Union , San Ignacio , Freiburgh , San Felipe , St. Lucas , and Belmont ; about ...
Seite 23
... smelting operations without further addition of lead ores . Fifty feet below the mouth of the incline an assay of $ 178 32 in silver per ton , from an ore seam of 1 feet in width , was obtained . At the time of Mr. Luckhardt's visit ...
... smelting operations without further addition of lead ores . Fifty feet below the mouth of the incline an assay of $ 178 32 in silver per ton , from an ore seam of 1 feet in width , was obtained . At the time of Mr. Luckhardt's visit ...
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amalgam amount antimony Arizona arrastras assay average bullion Burnt River California Cañon carried cent chloride City claims Clear Creek County Colorado contains copper cost County Creek crushing cupellation deposits depth ditch east employed Eureka expense extracted feet deep feet wide furnace galena Gilpin County gold and silver Gold Hill granite Grass Valley gravel ground Gulch hundred hydraulic hydraulic mining inches iron iron pyrites labor latter lead ledge limestone located lode metal miles mill miners Mining Company mining districts months mountain Nevada northeast opened operations ounces owners oxides pans Pine placer mines plates porphyry portion pounds present pulp pyrites quantity quartz quicksilver reduced reported rich River roasting rock salt San Francisco shaft Sierra slag slates smelting southwest stamps Steam stoping sulphate sulphurets surface tailings tion tons Total tunnel vein Wickenburg width yield zinc