Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 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 ...
Halaman 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 1 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 1 involving large ...
Halaman 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 ...
Halaman 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 ...
Halaman 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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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