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 86
Stran 2
... stream of gold soon reached and passed the high mark previously attained , with a consequent still further expansion of trade and commerce . Wherever the prospector leads , civilization follows as a natural result . His achievements are ...
... stream of gold soon reached and passed the high mark previously attained , with a consequent still further expansion of trade and commerce . Wherever the prospector leads , civilization follows as a natural result . His achievements are ...
Stran 3
... and warble their beautiful language , they drifted down the stream of time without touching oar or rudder , or striking sand - bars or snags . That soft Arcadian day is gone . Its twilight still lingers in PRECIOUS METAL MINING . 3.
... and warble their beautiful language , they drifted down the stream of time without touching oar or rudder , or striking sand - bars or snags . That soft Arcadian day is gone . Its twilight still lingers in PRECIOUS METAL MINING . 3.
Stran 5
... stream of gold and silver , which increased the wealth and importance of the United States as a whole and placed it among the powers of the world . Abroad , similar changes have resulted from the discovery of gold and silver mines , as ...
... stream of gold and silver , which increased the wealth and importance of the United States as a whole and placed it among the powers of the world . Abroad , similar changes have resulted from the discovery of gold and silver mines , as ...
Stran 21
... stream they draw up sand in a hollow cane - like reed until it is full , then by shaking and jarring it they find grains of silver and gold mingled with the sand . Hence they conjecture that there is a vein of this metal ( sic ) in ...
... stream they draw up sand in a hollow cane - like reed until it is full , then by shaking and jarring it they find grains of silver and gold mingled with the sand . Hence they conjecture that there is a vein of this metal ( sic ) in ...
Stran 22
... streams flowing through auriferous regions , and perforated and worn as pendants . Gold beads evidently not European in their manufacture rudely hammered into round and oval shapes , with holes drilled through their centers or upper ...
... streams flowing through auriferous regions , and perforated and worn as pendants . Gold beads evidently not European in their manufacture rudely hammered into round and oval shapes , with holes drilled through their centers or upper ...
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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