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 halaman |
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Halaman 16
... gold ores - errors which , now that attention has been so strongly called to them by the press of the State , are ... gold is readily amalgamated , and therefore it is not neces- sary to be so particular ; consequently there is an ...
... gold ores - errors which , now that attention has been so strongly called to them by the press of the State , are ... gold is readily amalgamated , and therefore it is not neces- sary to be so particular ; consequently there is an ...
Halaman 17
... gold mining . Test No. 1. Average yield of ore in mill , $ 18.60 . Wastage after complete washing , including concentrating - silver , 83.14 ; gold , $ 10.04 ; total , $ 13.18 . Test No. 2. Same mill - tailings 350 feet from mill ...
... gold mining . Test No. 1. Average yield of ore in mill , $ 18.60 . Wastage after complete washing , including concentrating - silver , 83.14 ; gold , $ 10.04 ; total , $ 13.18 . Test No. 2. Same mill - tailings 350 feet from mill ...
Halaman 18
... gold ores are so readily amalgamated , is one of the ruinous ideas extant . The majority of California miners are , in fact , but little experienced in all the trouble- some accompaniments of even gold ores , considering that if the ...
... gold ores are so readily amalgamated , is one of the ruinous ideas extant . The majority of California miners are , in fact , but little experienced in all the trouble- some accompaniments of even gold ores , considering that if the ...
Halaman 19
... gold are given in the following extracts : Our present general system of gold mining is based upon the idea that gold is mainly coarse , while examination will show that the high percentage is in atoms finer than flour itself . In my ...
... gold are given in the following extracts : Our present general system of gold mining is based upon the idea that gold is mainly coarse , while examination will show that the high percentage is in atoms finer than flour itself . In my ...
Halaman 26
... gold , and having become thoroughly decomposed through chemical and elemental action , the metal has been liberated from its matrix , and they , together with the inclosing slates , can now be readily torn down and washed away by the ...
... gold , and having become thoroughly decomposed through chemical and elemental action , the metal has been liberated from its matrix , and they , together with the inclosing slates , can now be readily torn down and washed away by the ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California CaƱon 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 metal metallurgy 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