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 54
... surface instead of the bottom of the basin , and the work was abandoned . No tunnel except one from Wood's Creek seemed feasible for the drainage of this ground , and this would have been nearly five miles in length with a light grade ...
... surface instead of the bottom of the basin , and the work was abandoned . No tunnel except one from Wood's Creek seemed feasible for the drainage of this ground , and this would have been nearly five miles in length with a light grade ...
الصفحة 58
... surface . The Hites ' Cove mine ( described in report for 1871 ) is engaged in driving a cross - cut which is expected to reach the lode in May , 1872 . This cross - cut will give them three hundred feet of backs . This mine has always ...
... surface . The Hites ' Cove mine ( described in report for 1871 ) is engaged in driving a cross - cut which is expected to reach the lode in May , 1872 . This cross - cut will give them three hundred feet of backs . This mine has always ...
الصفحة 59
... surface and relying on the pressure . Two hundred inches have been safely run through this pipe . The gold found here is noted for its fineness , and is probably the result of the breaking up of old channels , of which remnants are ...
... surface and relying on the pressure . Two hundred inches have been safely run through this pipe . The gold found here is noted for its fineness , and is probably the result of the breaking up of old channels , of which remnants are ...
الصفحة 60
... surface - diggings of the vicinity were found on the slope to the east of this mound and in the bed of Wood's Creek . These detached masses of gravel are said to extend southerly into Mariposa County , where they exist in larger bodies ...
... surface - diggings of the vicinity were found on the slope to the east of this mound and in the bed of Wood's Creek . These detached masses of gravel are said to extend southerly into Mariposa County , where they exist in larger bodies ...
الصفحة 61
... surface which can be cut down on an open face and run through the 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. ...
... surface which can be cut down on an open face and run through the 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. ...
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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