Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 14
... appear in this report , and letters and circu- lars soliciting information were sent to such mining counties as could not be visited by an agent . The following is a copy of a circular of which two hundred copies were dispatched to ...
... appear in this report , and letters and circu- lars soliciting information were sent to such mining counties as could not be visited by an agent . The following is a copy of a circular of which two hundred copies were dispatched to ...
Halaman 19
... appear that there has been some extravagant and even culpable expendi ture incurred on mining account , it may yet be claimed that we have introduced many valuable improvements into this business , and ad- vanced it with an energy that ...
... appear that there has been some extravagant and even culpable expendi ture incurred on mining account , it may yet be claimed that we have introduced many valuable improvements into this business , and ad- vanced it with an energy that ...
Halaman 27
... appears that not less than ten or twelve diamonds have probably been found within four or five miles of this town . And I have no doubt that many more have been picked up and looked at and thrown away , the finders not knowing what they ...
... appears that not less than ten or twelve diamonds have probably been found within four or five miles of this town . And I have no doubt that many more have been picked up and looked at and thrown away , the finders not knowing what they ...
Halaman 31
... appears to be about twenty per cent . more than in the great valleys of the Sacramento and San Joaquin . In Nevada City , at an elevation of about 2,500 feet above sea - level , the fall of rain has been more than double that of the ...
... appears to be about twenty per cent . more than in the great valleys of the Sacramento and San Joaquin . In Nevada City , at an elevation of about 2,500 feet above sea - level , the fall of rain has been more than double that of the ...
Halaman 35
... appear- ance like plowshares ) which , in the rapid revolution of the arms , break up the cemented gravel . An abundant supply of water is dis- tributed while the pan is in motion , and materially aids in the disintegra- tion of the ...
... appear- ance like plowshares ) which , in the rapid revolution of the arms , break up the cemented gravel . An abundant supply of water is dis- tributed while the pan is in motion , and materially aids in the disintegra- tion of 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