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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Zadetki 1–5 od 71
Stran iii
... extending from the earliest known records , including legends , up to the present time . This account has further been supplemented by a tabulated list of first discoveries , by whom and when made , and finally an extended chronology of ...
... extending from the earliest known records , including legends , up to the present time . This account has further been supplemented by a tabulated list of first discoveries , by whom and when made , and finally an extended chronology of ...
Stran 1
... extending from the Tropics to the frozen fastnesses of the Frigid Zone . These beginnings , though small , rapidly grew to great importance , and were directly respon- sible for the colonization and development of the territory farther ...
... extending from the Tropics to the frozen fastnesses of the Frigid Zone . These beginnings , though small , rapidly grew to great importance , and were directly respon- sible for the colonization and development of the territory farther ...
Stran 13
... extending the credit and securing its liabilities . Thus any given quantity of gold raised is not only so much more money in immedi- ate circulation , but it is also the basis from which radiates additional capital , in the shape of ...
... extending the credit and securing its liabilities . Thus any given quantity of gold raised is not only so much more money in immedi- ate circulation , but it is also the basis from which radiates additional capital , in the shape of ...
Stran 32
... extending nearly thirty leagues , was discovered lately , together with mines of mineral coal , etc. " 1 Min . and Sci . Press , Vol . 47 , p . 292 . 2 According to some authorities these placers were first discovered in 1812 . Trans ...
... extending nearly thirty leagues , was discovered lately , together with mines of mineral coal , etc. " 1 Min . and Sci . Press , Vol . 47 , p . 292 . 2 According to some authorities these placers were first discovered in 1812 . Trans ...
Stran 42
... extends along the mountains to the shores of the icy sea , and is thus con- nected with the gold regions of Asia . " Based upon this authority the work of prospecting the interior began . Mr. H. H. McIntyre made a somewhat similar ...
... extends along the mountains to the shores of the icy sea , and is thus con- nected with the gold regions of Asia . " Based upon this authority the work of prospecting the interior began . Mr. H. H. McIntyre made a somewhat similar ...
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Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende calcite California Carolina cent chalcopyrite chlorination Colorado Comstock lode considerable copper country-rock County Cripple Creek cyanide cyanide process Deep Mines deposits depth diorite discovered discovery district dollars drift employed extraction feet free-gold furnace galena gangue gold and silver gold production gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho igneous rocks inches iron Jour lead limestone located mercury method Mexico mill Mineral Industry Mineral Resources Mines and Minerals Montana Mountain Nevada North North Carolina occur operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite quantities quartz quartz-veins Rept River roasting rocks schists shaft silver production Silver-bearing slate sluices smelting solution South stamps stope sulphides sulphurets surface TABLE tellurides tellurium tetrahedrite timber tion tons Total tunnel usually Utah veins width yield zinc