Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 46
... eastern edge of the San Joaquin Valley to an average altitude of 2,500 on the Sierras , a distance of forty miles east and west , thus embracing an area of 4,000 square miles . This region of country was the scene of the earliest mining ...
... eastern edge of the San Joaquin Valley to an average altitude of 2,500 on the Sierras , a distance of forty miles east and west , thus embracing an area of 4,000 square miles . This region of country was the scene of the earliest mining ...
Halaman 47
... east of Columbia , in Tuolumne County , smaller veins occur , with an east and west course , generally in the slates . This latter class have the peculiarities of gash - veins , most of them " pinching out " at a depth of from fifty to ...
... east of Columbia , in Tuolumne County , smaller veins occur , with an east and west course , generally in the slates . This latter class have the peculiarities of gash - veins , most of them " pinching out " at a depth of from fifty to ...
Halaman 54
... eastern side of Table Mountain , and their location running down on the western side of the lava - covered mountain ... east of Table Mountain . This tunnel , if completed , would have been about three miles in length , but after spend ...
... eastern side of Table Mountain , and their location running down on the western side of the lava - covered mountain ... east of Table Mountain . This tunnel , if completed , would have been about three miles in length , but after spend ...
Halaman 59
... east of Table Mountain , at an elevation of 1,300 feet above sea- level , the Mother lode lying about one mile east of the town . The present population does not exceed five hundred persons , of whom three - fifths are Chinese . The ...
... east of Table Mountain , at an elevation of 1,300 feet above sea- level , the Mother lode lying about one mile east of the town . The present population does not exceed five hundred persons , of whom three - fifths are Chinese . The ...
Halaman 60
... east of the town , and about one hundred and eighty feet above the level of the basin , covers an area of about ten acres and proved exceedingly rich , most of the pay being found in a blue streak , varying from one to twenty inches in ...
... east of the town , and about one hundred and eighty feet above the level of the basin , covers an area of about ten acres and proved exceedingly rich , most of the pay being found in a blue streak , varying from one to twenty inches in ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Caņon 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