Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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النتائج 11-15 من 82
الصفحة 37
... metals appear to have a tendency to float . in water , when in fine particles , some more than others . This is caused by a particle of gas , either air or water gas adhering to the particles of metals , which causes it to be light and ...
... metals appear to have a tendency to float . in water , when in fine particles , some more than others . This is caused by a particle of gas , either air or water gas adhering to the particles of metals , which causes it to be light and ...
الصفحة 38
... metals , is soon precipitated and collected for drawing off into a receiver . The lighter portions of mercury and metal , in due time are drawn off into an electric set- tler , where they are precipitated by electricity upon the ...
... metals , is soon precipitated and collected for drawing off into a receiver . The lighter portions of mercury and metal , in due time are drawn off into an electric set- tler , where they are precipitated by electricity upon the ...
الصفحة 39
... metal , by the agency of electricity , and at any time within ten minutes can be cleaned up quite thoroughly without stopping machinery . The action of electricity has a remarkable cleansing effect upon mercury . Their efficiency in ...
... metal , by the agency of electricity , and at any time within ten minutes can be cleaned up quite thoroughly without stopping machinery . The action of electricity has a remarkable cleansing effect upon mercury . Their efficiency in ...
الصفحة 47
... metal in bars . Up to that period nine smelting - furnaces had been erected in California at an aggregate cost of $ 236,000 , all of which proved financial failures , and a majority of which were technical failures . When the copper ...
... metal in bars . Up to that period nine smelting - furnaces had been erected in California at an aggregate cost of $ 236,000 , all of which proved financial failures , and a majority of which were technical failures . When the copper ...
الصفحة 48
... metal is increasing . Should the Stockton and Copperopolis Railroad be completed to Cop- peropolis , it is believed that with present prices of labor ( $ 2 to $ 3 per day ) these mines could be re - opened , and the second - class ores ...
... metal is increasing . Should the Stockton and Copperopolis Railroad be completed to Cop- peropolis , it is believed that with present prices of labor ( $ 2 to $ 3 per day ) these mines could be re - opened , and the second - class ores ...
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