Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 3
... METALS . BY ROSSITER W. RAYMOND , PH . D. , U.S. COMMISSIONER OF MINING STATISTICS ; PRESIDENT OF THE AMERICAN INSTITUTE OF MINING ENGINEERS ; EDITOR OF THE ENGINEERING AND MINING JOURNAL ; AUTHOR OF " MINES OF THE WEST , " " AMERICAN ...
... METALS . BY ROSSITER W. RAYMOND , PH . D. , U.S. COMMISSIONER OF MINING STATISTICS ; PRESIDENT OF THE AMERICAN INSTITUTE OF MINING ENGINEERS ; EDITOR OF THE ENGINEERING AND MINING JOURNAL ; AUTHOR OF " MINES OF THE WEST , " " AMERICAN ...
Halaman 15
... metals has for the past two years made very marked advances through- out all parts of the Pacific slope . Never within a like period has this pursuit so strengthened itself in public confidence , or undergone so great territorial ...
... metals has for the past two years made very marked advances through- out all parts of the Pacific slope . Never within a like period has this pursuit so strengthened itself in public confidence , or undergone so great territorial ...
Halaman 16
... metal saved after heavy expenditure for extracting and raising ores . In seeking for the cause of many early failures ... metals is lost in the manipulating of ores by the present modes of working , no one for a moment questions ; but ...
... metal saved after heavy expenditure for extracting and raising ores . In seeking for the cause of many early failures ... metals is lost in the manipulating of ores by the present modes of working , no one for a moment questions ; but ...
Halaman 17
... metals to precipi- tate previous to reaching this tank : first , in the tailing reservoir , and second , in the well . This " float " -metal question is further established by a system of tests made by Mr. G. McDougal , of Grass Valley ...
... metals to precipi- tate previous to reaching this tank : first , in the tailing reservoir , and second , in the well . This " float " -metal question is further established by a system of tests made by Mr. G. McDougal , of Grass Valley ...
Halaman 18
... metals . This plan of seeing how much can be pounded up and rushed through every 24 hours , is a false , wasteful ... metal . That our gold ores are so readily amalgamated , is one of the ruinous ideas extant . The majority of California ...
... metals . This plan of seeing how much can be pounded up and rushed through every 24 hours , is a false , wasteful ... metal . That our gold ores are so readily amalgamated , is one of the ruinous ideas extant . The majority of California ...
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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 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