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 129
... amalgam produced comes from the copper plates of the aprons and tables , only a small portion being found in the amalgamators . Leaving these , the pulp passes on to concentrating - ties or sluices , in which the sulphurets are saved or ...
... amalgam produced comes from the copper plates of the aprons and tables , only a small portion being found in the amalgamators . Leaving these , the pulp passes on to concentrating - ties or sluices , in which the sulphurets are saved or ...
الصفحة 192
... amalgam through a siphon . The settlers have each four plugs placed respectively 6 , 12 , 17 , and 22 inches from the top . The lowest plug is only removed during the clean - up . Five and a half feet lower are the agitators , one to ...
... amalgam through a siphon . The settlers have each four plugs placed respectively 6 , 12 , 17 , and 22 inches from the top . The lowest plug is only removed during the clean - up . Five and a half feet lower are the agitators , one to ...
الصفحة 193
... amalgam and quicksilver remain undischarged in the pan . ) The muller is then let down and left to grind for four and a half hours , then 250 pounds of quicksilver are added , and the grinding is continued for one hour . The muller is ...
... amalgam and quicksilver remain undischarged in the pan . ) The muller is then let down and left to grind for four and a half hours , then 250 pounds of quicksilver are added , and the grinding is continued for one hour . The muller is ...
الصفحة 194
... amalgam is strained as dry as possible . When 1,000 to 1,200 pounds of amalgam have accumulated , it is retorted and melted in the usual manner . Sampling . Every half hour the sampler goes around the battery , catching some of the pulp ...
... amalgam is strained as dry as possible . When 1,000 to 1,200 pounds of amalgam have accumulated , it is retorted and melted in the usual manner . Sampling . Every half hour the sampler goes around the battery , catching some of the pulp ...
الصفحة 364
... amalgam is retorted . The main building is 30 by 50 , contains one of Howland's 10 - stamp rotary batteries , two of Wheeler & Randall's amalgamating - pans , ( all cast iron , ) settler , and retorts . The furnace - building will be 35 ...
... amalgam is retorted . The main building is 30 by 50 , contains one of Howland's 10 - stamp rotary batteries , two of Wheeler & Randall's amalgamating - pans , ( all cast iron , ) settler , and retorts . The furnace - building will be 35 ...
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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