Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 21
... developed , and these being accepted only on the approval of competent experts , based on thorough and careful examination . It has occasionally happened that shares in these mines have been forced up in the market abroad to figures ...
... developed , and these being accepted only on the approval of competent experts , based on thorough and careful examination . It has occasionally happened that shares in these mines have been forced up in the market abroad to figures ...
الصفحة 47
... developed veins of gold - bearing quartz in the world ; and a system of veins running in the granites , high up in the Sierras , which are comparatively undeveloped . Other systems of veins , unconnected with either of the above , and ...
... developed veins of gold - bearing quartz in the world ; and a system of veins running in the granites , high up in the Sierras , which are comparatively undeveloped . Other systems of veins , unconnected with either of the above , and ...
الصفحة 49
... developed claims being the original Amador and Keystone at Amador City , although many loca- tions between these ... develop a permanent fissure of from fourteen to eighteen feet in width . The principal points at which mining has ...
... developed claims being the original Amador and Keystone at Amador City , although many loca- tions between these ... develop a permanent fissure of from fourteen to eighteen feet in width . The principal points at which mining has ...
الصفحة 50
... developed in advance of their milling capacity . Perhaps a third reason may be found in the superior attractiveness of the mines of the neighboring State of Nevada , where fortunes are made ( and lost ) with greater rapidity in mining ...
... developed in advance of their milling capacity . Perhaps a third reason may be found in the superior attractiveness of the mines of the neighboring State of Nevada , where fortunes are made ( and lost ) with greater rapidity in mining ...
الصفحة 51
... developed below the water - line . The future of these districts depends on the development of a few claims , considered as representative mines , on which work is now being prose cuted with the best indications of success . The ...
... developed below the water - line . The future of these districts depends on the development of a few claims , considered as representative mines , on which work is now being prose cuted with the best indications of success . The ...
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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