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 من الصفحات |
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الصفحة 41
... long tunnel ) is obviated . All over the Pacific coast are innumerable mines ... feet in dimensions . The great difficulty was in the application of power ... feet with one of his improved drills at a cost of $ 30 per foot , the ...
... long tunnel ) is obviated . All over the Pacific coast are innumerable mines ... feet in dimensions . The great difficulty was in the application of power ... feet with one of his improved drills at a cost of $ 30 per foot , the ...
الصفحة 53
... high up in the mountains . Of this character is the enterprise known as the " La Grange Ditch Company , " which is one of many having like objects . This company own between four and five thousand feet frontage on the Tuolumne River ...
... high up in the mountains . Of this character is the enterprise known as the " La Grange Ditch Company , " which is one of many having like objects . This company own between four and five thousand feet frontage on the Tuolumne River ...
الصفحة 54
... feet in length on the Table Mountain channel ; the " flat " being on the eastern side of Table Mountain , and their location running down on the western side of the lava - covered mountain toward the Stanislaus River . They are now ...
... feet in length on the Table Mountain channel ; the " flat " being on the eastern side of Table Mountain , and their location running down on the western side of the lava - covered mountain toward the Stanislaus River . They are now ...
الصفحة 58
... long - talked- of Mariposa ditch , located in 1852 , is no longer a myth but ... feet , and intend erecting powerful machinery , as there is water- power ... feet thick , averaging 24 feet . The average pay of the rock is now ...
... long - talked- of Mariposa ditch , located in 1852 , is no longer a myth but ... feet , and intend erecting powerful machinery , as there is water- power ... feet thick , averaging 24 feet . The average pay of the rock is now ...
الصفحة 59
... long duration , as the resources of the county in gold - bearing quartz have ... feet in the Sierras , is unequaled in the productiveness of its orchards and ... feet above sea- level , the Mother lode lying about one mile east ...
... long duration , as the resources of the county in gold - bearing quartz have ... feet in the Sierras , is unequaled in the productiveness of its orchards and ... feet above sea- level , the Mother lode lying about one mile east ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Cañon 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 metallurgy metals 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