Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 17
... total , $ 13.18 . Test No. 2. Same mill - tailings 350 feet from mill : silver , $ 3.93 ; gold , $ 5.02 ; total , $ 8.98 ; showing that a percentage secreted itself in its passage down stream . Test No. 3. Average yield of 150 tons ...
... total , $ 13.18 . Test No. 2. Same mill - tailings 350 feet from mill : silver , $ 3.93 ; gold , $ 5.02 ; total , $ 8.98 ; showing that a percentage secreted itself in its passage down stream . Test No. 3. Average yield of 150 tons ...
الصفحة 18
... Total . $ 12 06 81 40 4 13 $ 4.90 32 06 $ 16 96 116 46 6577 10 90 The yield of Quartz Mountain ran 9 per cent . silver . The ores of all the counties of California carry silver , and my experiments show they run from 3 to 50 per cent ...
... Total . $ 12 06 81 40 4 13 $ 4.90 32 06 $ 16 96 116 46 6577 10 90 The yield of Quartz Mountain ran 9 per cent . silver . The ores of all the counties of California carry silver , and my experiments show they run from 3 to 50 per cent ...
الصفحة 30
... Total Months . December . Months . 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.030 0.549 0.000 0.000 ... Total 35.549 11. 579 7.868 22. 512 17.924 25.305 32.769 16. 644 13.572 8.470 19.767 The records of the rain - fall ...
... Total Months . December . Months . 0.000 0.000 0.000 0.001 0.000 0.000 0.000 0.000 0.000 0.030 0.549 0.000 0.000 ... Total 35.549 11. 579 7.868 22. 512 17.924 25.305 32.769 16. 644 13.572 8.470 19.767 The records of the rain - fall ...
الصفحة 45
... Total claims surveyed , 72. Placer , 34 ; quartz , 33 ; quicksilver , 4 ; copper , 1. Many of these have been patented , and on the others patents are pending . Statistics of quartz - mills and mining ditches . - By the laws of Cali ...
... Total claims surveyed , 72. Placer , 34 ; quartz , 33 ; quicksilver , 4 ; copper , 1. Many of these have been patented , and on the others patents are pending . Statistics of quartz - mills and mining ditches . - By the laws of Cali ...
الصفحة 48
... total cost on each ton , mining , etc. , included , when landed at Swansea , has been estimated at $ 50 . Labor was then $ 4 per day . At this rate only first- grade ores paid a profit ; and with increasing depth , second - rate ores ...
... total cost on each ton , mining , etc. , included , when landed at Swansea , has been estimated at $ 50 . Labor was then $ 4 per day . At this rate only first- grade ores paid a profit ; and with increasing depth , second - rate ores ...
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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