Gold and Silver: Comprising an Economic History of Mining in the United States, the Geographical and Geological Occurrence of the Precious Metals, with Their Mineralogical Associations, History and Description of Methods of Mining and Extraction of Values, and a Detailed Discussion of the Production of Gold and Silver in the World and the United StatesJ. Wiley & Sons, 1908 - 727 strani |
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Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende calcite California Cañon cent chalcopyrite chlorination Colorado Comstock lode considerable copper country-rock County Cripple Creek cyanide cyanide process deposits depth discovered discovery of gold district dollars drift employed extraction feet free-gold furnace galena gangue gold and silver gold mining gold production gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho inches Indians iron Jour Lake Superior lead Leadville limestone located mercury method Mexico miles mill Mineral Resources Mines and Minerals mining industry Montana Mountain Nevada North Carolina operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite quantities quartz quartz-veins reported Rept rich River rocks schists shaft Silver-bearing slate sluices smelting South stamps stope sulphides sulphurets surface TABLE tellurides tetrahedrite timber tion tons tunnel United Utah Valley veins yield
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