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 23
... commence- ment of the present year it has been found necessary to increase the number and enlarge the capacity by making costly additions to the establishment . There are four fifty - vara lots to be filled in up to deep water , and ...
... commence- ment of the present year it has been found necessary to increase the number and enlarge the capacity by making costly additions to the establishment . There are four fifty - vara lots to be filled in up to deep water , and ...
الصفحة 25
... commenced , and some of them well advanced for supplying the mines with water in different parts of the State . A ditch of considerable magnitude was completed last summer on the Klamath , carrying water upou a number of high bars along ...
... commenced , and some of them well advanced for supplying the mines with water in different parts of the State . A ditch of considerable magnitude was completed last summer on the Klamath , carrying water upou a number of high bars along ...
الصفحة 28
... commenced gath- ering our materials into shape with the idea eventually of publishing a map of the mining counties . Such a map has been partly prepared , and will be submitted to the legisla- ture , in order that they may have the ...
... commenced gath- ering our materials into shape with the idea eventually of publishing a map of the mining counties . Such a map has been partly prepared , and will be submitted to the legisla- ture , in order that they may have the ...
الصفحة 36
... commenced on the " Lang Syne " ore , from a mine belonging to the " Great Central Mining Company of San Francisco , " the results of which speak more for your process , and the great revolution the system is likely to inaugurate , and ...
... commenced on the " Lang Syne " ore , from a mine belonging to the " Great Central Mining Company of San Francisco , " the results of which speak more for your process , and the great revolution the system is likely to inaugurate , and ...
الصفحة 43
... commences . Four feet of the sand is removed with a common sand - pump from the upper part of each hole , and one foot of clay - tamping is put in . This leaves an ordinary three- foot hole , which is blasted out , ( with dualine or ...
... commences . Four feet of the sand is removed with a common sand - pump from the upper part of each hole , and one foot of clay - tamping is put in . This leaves an ordinary three- foot hole , which is blasted out , ( with dualine or ...
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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