Silver and Gold: an Account of the Mining and Metallurgical Industry of the United States: With Reference Chiefly to the Precious MetalsJ.B. Ford, 1873 - 566 halaman |
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Halaman 22
... rivers , with vast banks of auriferous gravel , some of them several hundred feet deep , all of which , though useless to ... river - channels , every- thing is conducted on a scale that causes most former works of the kind to sink into ...
... rivers , with vast banks of auriferous gravel , some of them several hundred feet deep , all of which , though useless to ... river - channels , every- thing is conducted on a scale that causes most former works of the kind to sink into ...
Halaman 23
... River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly three hundred miles from the point of diversion on the Truckee River , the outlet of ...
... River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly three hundred miles from the point of diversion on the Truckee River , the outlet of ...
Halaman 24
... Rivers and other streams tributary to the Middle Fork of the American River , which have also been claimed and taken possession of , according to law . These are all very favorably situated in the high Sierras , and constitute one of ...
... Rivers and other streams tributary to the Middle Fork of the American River , which have also been claimed and taken possession of , according to law . These are all very favorably situated in the high Sierras , and constitute one of ...
Halaman 26
... River , in El Dorado County . The formation , here covering a large portion of two entire townships traversed by the company's canal , consists of a soft , easily disintegrated slate , permeated by innumerable small scams of quartz ...
... River , in El Dorado County . The formation , here covering a large portion of two entire townships traversed by the company's canal , consists of a soft , easily disintegrated slate , permeated by innumerable small scams of quartz ...
Halaman 28
... Rivers . In the mean time Mr. W. A. Goodyear commenced on the detailed survey of the mining belt of the Sierra lying to the south of the North Fork of the American River , and continued in the field until driven out by the inclemency of ...
... Rivers . In the mean time Mr. W. A. Goodyear commenced on the detailed survey of the mining belt of the Sierra lying to the south of the North Fork of the American River , and continued in the field until driven out by the inclemency of ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California CaƱon carbonate cent chemical claim coal commenced company's contains copper cost County course Creek Cupellation December deposits depth developed district ditch drift drill east El Dorado County engine erected Eureka expense extracted feet deep feet in length feet long feet wide furnace galena gangue gold Gold Hill gravel ground Gulch Hill hundred hydraulic inches incline iron labor lead ledge limestone located lode metal metallurgy miles mill miners Mining Company months nearly Nevada opened operations ounces owners placer mines pounds present Professor prospecting quantity quartz quartzite rich River rock San Francisco silver slag slate smelting smelting-works stamps stopes sulphurets sunk supply surface Table Mountain tailings thick tion tons Total tunnel Tuolumne County tuyeres Valley vein width yield