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 7
... means could supply . Those portions of the reports which discuss the geological , metallurgical , and mechanical problems involved in American mining have been widely studied , quoted , and discussed , and have done much , if I may ...
... means could supply . Those portions of the reports which discuss the geological , metallurgical , and mechanical problems involved in American mining have been widely studied , quoted , and discussed , and have done much , if I may ...
Halaman 8
... means of soliciting such copies from the Department , or from members of Con- gress , who are overrun with other applications . The Commissioners of Agriculture and of the General Land Office are not crippled in this way in the ...
... means of soliciting such copies from the Department , or from members of Con- gress , who are overrun with other applications . The Commissioners of Agriculture and of the General Land Office are not crippled in this way in the ...
Halaman 9
... means at my disposal . Wells , Fargo & Company , and all their agents throughout the country were , as usual , most generous in their courtesy and active assistance . The general condition and prospects of our western mining industry ...
... means at my disposal . Wells , Fargo & Company , and all their agents throughout the country were , as usual , most generous in their courtesy and active assistance . The general condition and prospects of our western mining industry ...
Halaman 14
... means would permit . Mr. C. Luckhardt visited San Diego County and Inyo County , and much valuable information was gleaned from the returns of the United States census marshals . During the present year a hasty trip was made through the ...
... means would permit . Mr. C. Luckhardt visited San Diego County and Inyo County , and much valuable information was gleaned from the returns of the United States census marshals . During the present year a hasty trip was made through the ...
Halaman 19
... means for washing auriferous earth , in the use of hydraulic power , in our ore - crushing machinery , our roasting - furnaces , our concentrators and amalgamators , and in much of our other milling - apparatus and appliances , we can ...
... means for washing auriferous earth , in the use of hydraulic power , in our ore - crushing machinery , our roasting - furnaces , our concentrators and amalgamators , and in much of our other milling - apparatus and appliances , we can ...
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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