Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 5
... silver ores by fusion 410 XII . The amalgamation of gold ores 422 XIII . The amalgamation of silver ores in pans with the aid of chem- icals ..... 427 XIV . The treatment of ores of native silver in Chihuahua .. XV . The reduction of ...
... silver ores by fusion 410 XII . The amalgamation of gold ores 422 XIII . The amalgamation of silver ores in pans with the aid of chem- icals ..... 427 XIV . The treatment of ores of native silver in Chihuahua .. XV . The reduction of ...
Halaman 16
... silver , that a higher percentage of silver is more readily obtained by the known system of working for silver than the percentage of gold by its most advanced system , showing that gold milling is far behind silver working , although ...
... silver , that a higher percentage of silver is more readily obtained by the known system of working for silver than the percentage of gold by its most advanced system , showing that gold milling is far behind silver working , although ...
Halaman 17
... silver in all of our California ores ; and I will also remark that the assay of tailings does not even show what percentage of silver the ores may contain , as some may be in the form of chlorides which move off in the water . But to ...
... silver in all of our California ores ; and I will also remark that the assay of tailings does not even show what percentage of silver the ores may contain , as some may be in the form of chlorides which move off in the water . But to ...
Halaman 18
... silver , but no comparison between the work- ing of the two metals . This plan of seeing how much can be pounded up ... silver associated with the gold - bearing quartz : That there has been still too great a wastage of precious metal ...
... silver , but no comparison between the work- ing of the two metals . This plan of seeing how much can be pounded up ... silver associated with the gold - bearing quartz : That there has been still too great a wastage of precious metal ...
Halaman 92
... Silver Sprout , " are about 300 feet apart , parallel to each other and to the crest of the mountain . They cut through and across three ridges which extend down the side of the mountain . This gives the best possible position for ...
... Silver Sprout , " are about 300 feet apart , parallel to each other and to the crest of the mountain . They cut through and across three ridges which extend down the side of the mountain . This gives the best possible position for ...
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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