Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 7
... mining , milling , and smelting throughout the West . The addi- tional labor of correspondence thus thrown upon me will be cheerfully discharged , so far as time and strength permit . While this part of my work has greatly increased ...
... mining , milling , and smelting throughout the West . The addi- tional labor of correspondence thus thrown upon me will be cheerfully discharged , so far as time and strength permit . While this part of my work has greatly increased ...
الصفحة 22
... smelting , larger furnaces will be substituted for the rude and limited works used for pioneer purposes , these having in some instances already been replaced by others of more perfect patterns and increased capacity . We have already ...
... smelting , larger furnaces will be substituted for the rude and limited works used for pioneer purposes , these having in some instances already been replaced by others of more perfect patterns and increased capacity . We have already ...
الصفحة 47
... work the copper mines of California ( the most productive of which are in the southern mining re- gion ) had exported 68,631 tons of ore and 847 tons of metal in bars . Up to that period nine smelting - furnaces had been erected in ...
... work the copper mines of California ( the most productive of which are in the southern mining re- gion ) had exported 68,631 tons of ore and 847 tons of metal in bars . Up to that period nine smelting - furnaces had been erected in ...
الصفحة 91
... smelting - works . There has , however , nothing new of importance been developed during the year , and my description of the mines and furnaces in my last report exhausts the subject . My let- ters to prominent men in Cerro Gordo ...
... smelting - works . There has , however , nothing new of importance been developed during the year , and my description of the mines and furnaces in my last report exhausts the subject . My let- ters to prominent men in Cerro Gordo ...
الصفحة 167
... smelting operations at Eureka , and to a resumption , to a large extent , of the activity of several years ago in ... worked to any extent for . years , al- though only one of these , the Citizens ' Mill , does custom work . It was ...
... smelting operations at Eureka , and to a resumption , to a large extent , of the activity of several years ago in ... worked to any extent for . years , al- though only one of these , the Citizens ' Mill , does custom work . It was ...
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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