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 7
... expenses . A careful estimate , made in detail , shows that twenty - five thousand dollars would be re- quired to carry out a comprehensive plan , including the employment of resident agents in all the leading districts , and the ...
... expenses . A careful estimate , made in detail , shows that twenty - five thousand dollars would be re- quired to carry out a comprehensive plan , including the employment of resident agents in all the leading districts , and the ...
الصفحة 13
... expense , and its satisfactory performance would require a much larger expenditure of money than it has been within the power of the Commissioner to devote to any one State or Territory from the small appropriation made by Congress for ...
... expense , and its satisfactory performance would require a much larger expenditure of money than it has been within the power of the Commissioner to devote to any one State or Territory from the small appropriation made by Congress for ...
الصفحة 14
... expense of milling per cubic yard ( where stamps are used ) in cement and gravel claims . Superintendents and secretaries of mining companies , and proprietors of mining ground , are urgently solicited to furnish such details of the ...
... expense of milling per cubic yard ( where stamps are used ) in cement and gravel claims . Superintendents and secretaries of mining companies , and proprietors of mining ground , are urgently solicited to furnish such details of the ...
الصفحة 15
... expense of treatment by mill process , at French Corral . I am also under obligations to Messrs . Cronise and Cross- man , and to Dr. Henry De Groot , of San Francisco ; also to Mr. Lyman Ackley , of Smartsville , Yuba County , and Mr ...
... expense of treatment by mill process , at French Corral . I am also under obligations to Messrs . Cronise and Cross- man , and to Dr. Henry De Groot , of San Francisco ; also to Mr. Lyman Ackley , of Smartsville , Yuba County , and Mr ...
الصفحة 22
... expense for freight , interest , and insurance , and much quicker returns of extracted bullion . So rapid has been the development of this comparatively new industry , that although the Selby Smelting Works contained twenty - five large ...
... expense for freight , interest , and insurance , and much quicker returns of extracted bullion . So rapid has been the development of this comparatively new industry , that although the Selby Smelting Works contained twenty - five large ...
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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