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 9
... Professor W. P. Blake , who examined for me several dis- tricts , and a number of other gentlemen to whom credit is given in the appropriate chapter . In other Territories , I would name particularly Messrs . John Wasson , surveyor ...
... Professor W. P. Blake , who examined for me several dis- tricts , and a number of other gentlemen to whom credit is given in the appropriate chapter . In other Territories , I would name particularly Messrs . John Wasson , surveyor ...
Halaman 52
... Professor Whitney estimates the amount of denudation which has taken place during the period since this lava flow took its present position at not less than three or four thousand feet of vertical height . The excessive hardness of the ...
... Professor Whitney estimates the amount of denudation which has taken place during the period since this lava flow took its present position at not less than three or four thousand feet of vertical height . The excessive hardness of the ...
Halaman 56
... Professor Whitney's assistants , in a letter to the Mountain Democrat , thus foreshadows a new theory : 27 With reference to the general question of the origin and distribution of the aurif- erous gravel itself there have been no end of ...
... Professor Whitney's assistants , in a letter to the Mountain Democrat , thus foreshadows a new theory : 27 With reference to the general question of the origin and distribution of the aurif- erous gravel itself there have been no end of ...
Halaman 81
... Professor Whitney , in his volume on General Geology : The sedimentary and volcanic deposits near the town are about 250 feet thick , and rest on a bed - rock which has an elevation of about 1,800 feet above the bed of the Mokel- umne ...
... Professor Whitney , in his volume on General Geology : The sedimentary and volcanic deposits near the town are about 250 feet thick , and rest on a bed - rock which has an elevation of about 1,800 feet above the bed of the Mokel- umne ...
Halaman 95
... Professor W. T. Rickard , how the assayer and metallurgist of the Tarshish . The copper ore of the Globe mine is yellow sulphuret in the upper portion of the lode , changing to peacock in depth , and the latter giving way to a fine ...
... Professor W. T. Rickard , how the assayer and metallurgist of the Tarshish . The copper ore of the Globe mine is yellow sulphuret in the upper portion of the lode , changing to peacock in depth , and the latter giving way to a fine ...
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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