Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 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 66 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 66 OF MINES OF THE WEST , ' " AMERICAN ...
الصفحة 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 ...
الصفحة 16
... metal saved after heavy expenditure for extracting and raising ores . In seeking for the cause of many early ... 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 ... metals is lost in the manipulating of ores by the present modes of working , no one for a moment questions ; but ...
الصفحة 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 ...
الصفحة 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 ...
... 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 ...
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