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 83
Stran 4
... claimed for mining that , however rapidly the Star of Empire might have made its way westward , it certainly would have been many years before its light would have reached the coast of California . From California the pioneers passed to ...
... claimed for mining that , however rapidly the Star of Empire might have made its way westward , it certainly would have been many years before its light would have reached the coast of California . From California the pioneers passed to ...
Stran 18
... claimed that in California , in 1906 , more machinery was purchased in weight and cost of manufacture ( by that industry ) than any other mining industry.1 In a paper entitled , " The Relation of the Mining Law of the United States to ...
... claimed that in California , in 1906 , more machinery was purchased in weight and cost of manufacture ( by that industry ) than any other mining industry.1 In a paper entitled , " The Relation of the Mining Law of the United States to ...
Stran 33
... claimed that the knowledge of the discovery was not known to the Mexicans , while the Amer- ican officials affected ignorance . The following extract from an unofficial letter written on March , 1846 , by T. O. Larkin , then United ...
... claimed that the knowledge of the discovery was not known to the Mexicans , while the Amer- ican officials affected ignorance . The following extract from an unofficial letter written on March , 1846 , by T. O. Larkin , then United ...
Stran 39
... claimed that the Cliff mine realized $ 5000 a year in silver alone.3 1 Eng . and Min . Jour . , Vol . 20 , p . 575 . 2 Rept . on the Geol . and Topography of a Portion of the Lake Superior Land District in the State of Michigan , Doc ...
... claimed that the Cliff mine realized $ 5000 a year in silver alone.3 1 Eng . and Min . Jour . , Vol . 20 , p . 575 . 2 Rept . on the Geol . and Topography of a Portion of the Lake Superior Land District in the State of Michigan , Doc ...
Stran 48
... claimed to be the northernmost mine of Alaska , was discovered in 1881. It is located on Fish River near Golofnin Bay , about sixty miles north of St. Michael , at a latitude of 65 degrees north , and is practically under the Arctic ...
... claimed to be the northernmost mine of Alaska , was discovered in 1881. It is located on Fish River near Golofnin Bay , about sixty miles north of St. Michael , at a latitude of 65 degrees north , and is practically under the Arctic ...
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Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende bornite calcite California Carolina cent chalcopyrite chloride chlorination Colorado Comstock lode concentration 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 gneiss gold and silver gold production Gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho inches iron Jour lead limestone located mercury method Mexico mill Mineral Industry Mineral Resources Mines and Minerals Montana Mountain Nevada North occur operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite pyrrhotite quantities quartz quartz-veins quartzites Rept rhyolite River rocks schists shaft siliceous silver production Silver-bearing slate sluices smelting solution South stamps stope sulphides sulphurets surface TABLE tellurides tellurium tetrahedrite timber tion tons Total tunnel Utah yield zinc