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 100
Stran v
... Region ( the North Shore , Canada , and the South Shore , the United States ) . RECENT HISTORY BY STATES AND TERRITORIES Alabama , Alaska , Arizona , Arkansas , California , The Carolinas , Colorado , Connecticut , Georgia , Idaho ...
... Region ( the North Shore , Canada , and the South Shore , the United States ) . RECENT HISTORY BY STATES AND TERRITORIES Alabama , Alaska , Arizona , Arkansas , California , The Carolinas , Colorado , Connecticut , Georgia , Idaho ...
Stran ix
... Region of Eastern Oregon 258 Map of Porto Rico . . 261 Map of the Mercur Region , Utah 268 Bingham Cañon Region , Utah . 270 Snake River Gold Fields , Idaho 315 Arrangement of Sluices in Hydraulic Mining facing 370 A Yuba River Dam and ...
... Region of Eastern Oregon 258 Map of Porto Rico . . 261 Map of the Mercur Region , Utah 268 Bingham Cañon Region , Utah . 270 Snake River Gold Fields , Idaho 315 Arrangement of Sluices in Hydraulic Mining facing 370 A Yuba River Dam and ...
Stran 10
... region has created a lake marine service which is shared in like measure by the grain , lumber and fuel industries . The tremendous advantage of the development of a mineral or fuel industry , as for instance the oil industry at ...
... region has created a lake marine service which is shared in like measure by the grain , lumber and fuel industries . The tremendous advantage of the development of a mineral or fuel industry , as for instance the oil industry at ...
Stran 11
... region where only the search for wealth , sudden wealth , was the inspiring motive of the population , each man was his own employer to a large degree . In consequence labor was scarce and high priced . Necessity is ever the mother of ...
... region where only the search for wealth , sudden wealth , was the inspiring motive of the population , each man was his own employer to a large degree . In consequence labor was scarce and high priced . Necessity is ever the mother of ...
Stran 12
... region . " By skillful improvements they have been increased in efficiency until from a few tons per day they are now capable of crushing several hundred tons per day in regular work in that length of time . " The machine drill was ...
... region . " By skillful improvements they have been increased in efficiency until from a few tons per day they are now capable of crushing several hundred tons per day in regular work in that length of time . " The machine drill was ...
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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