Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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النتائج 6-10 من 93
الصفحة 61
... mill in large quantities , with a profit of $ 3 to $ 5 per ton without in- terfering with the development of the mine . The property is owned and managed by Mr. B. F. Heslep , and is an example of prudent and skillful management . He ...
... mill in large quantities , with a profit of $ 3 to $ 5 per ton without in- terfering with the development of the mine . The property is owned and managed by Mr. B. F. Heslep , and is an example of prudent and skillful management . He ...
الصفحة 62
... mill , situated a short distance below the mouth of the tunnel , is provided with Stanford's self - feeding apparatus , requiring only one man to attend to the fifteen stamps . No pans are used , as the main reliance is on the free gold ...
... mill , situated a short distance below the mouth of the tunnel , is provided with Stanford's self - feeding apparatus , requiring only one man to attend to the fifteen stamps . No pans are used , as the main reliance is on the free gold ...
الصفحة 67
... mill . They now have a first - class forty - stamp mill and three arrastras , capable of reducing fifty tons per day . The mine is kept developed in advance of the capacity of the mill , and it is estimated that the re- serves in sight ...
... mill . They now have a first - class forty - stamp mill and three arrastras , capable of reducing fifty tons per day . The mine is kept developed in advance of the capacity of the mill , and it is estimated that the re- serves in sight ...
الصفحة 69
... Mill . 10 Eagle Mill and Mining Work has been recommenced during present year Lombardo Mine and 10 Mill . Confidence Mine and 40 Mill . Company . Lombardo Company .. Ben . Holladay ....... with favorable prospects ; tunnel being run ...
... Mill . 10 Eagle Mill and Mining Work has been recommenced during present year Lombardo Mine and 10 Mill . Confidence Mine and 40 Mill . Company . Lombardo Company .. Ben . Holladay ....... with favorable prospects ; tunnel being run ...
الصفحة 70
... mill at the Thorn mine , and a 10 - stamp quartz - mill at the Union mine , are in contemplation . The Thorn mine has been sunk since last year to the depth of over 200 feet . There is in the shaft a well - defined gold - bearing quartz ...
... mill at the Thorn mine , and a 10 - stamp quartz - mill at the Union mine , are in contemplation . The Thorn mine has been sunk since last year to the depth of over 200 feet . There is in the shaft a well - defined gold - bearing quartz ...
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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