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 من الصفحات |
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الصفحة 7
... labor of correspondence thus thrown upon me will be cheerfully discharged , so far as time and strength permit . While this part of my work has greatly increased , the ordinary duty of collecting , by personal inspection or ...
... labor of correspondence thus thrown upon me will be cheerfully discharged , so far as time and strength permit . While this part of my work has greatly increased , the ordinary duty of collecting , by personal inspection or ...
الصفحة 15
... labor . It is also the case , that , while mining enterprise has been greatly stimulated of late , it has not , to such an extent as formerly , been misdirected or overdone . Very rarely have recent undertakings involving large ...
... labor . It is also the case , that , while mining enterprise has been greatly stimulated of late , it has not , to such an extent as formerly , been misdirected or overdone . Very rarely have recent undertakings involving large ...
الصفحة 16
... labor , but a critical investigation would show that it was to be attributed more frequently to other causes , which he thus enumerates : 1st . Too extensive as well as too expensive machinery on too small developments of positive ...
... labor , but a critical investigation would show that it was to be attributed more frequently to other causes , which he thus enumerates : 1st . Too extensive as well as too expensive machinery on too small developments of positive ...
الصفحة 17
... labor , as well as collecting all the data attainable from others , I know that the loss as a whole is fully 50 per cent . , and , in the majority of mills , all of 60 per cent . of what the ore contains . From these data of loss we ...
... labor , as well as collecting all the data attainable from others , I know that the loss as a whole is fully 50 per cent . , and , in the majority of mills , all of 60 per cent . of what the ore contains . From these data of loss we ...
الصفحة 19
... labor , the want of material , the character of the ores , the climate , and , in short , all the conditions , were so unlike those to which the experts of other countries had been accustomed , that they , of all others , proved the ...
... labor , the want of material , the character of the ores , the climate , and , in short , all the conditions , were so unlike those to which the experts of other countries had been accustomed , that they , of all others , proved the ...
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