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 halaman |
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Halaman 14
... deposits ; an estimate of the yield of hydraulic ground , per cubic yard ; and a statement of the yield and expense of milling per cubic yard ( where stamps are used ) in cement and gravel claims . Superintendents and secretaries of ...
... deposits ; an estimate of the yield of hydraulic ground , per cubic yard ; and a statement of the yield and expense of milling per cubic yard ( where stamps are used ) in cement and gravel claims . Superintendents and secretaries of ...
Halaman 16
... deposits are held in reserve , and exploratory la- bors maintained well in advance of extraction . In strong contrast with the unfortunate results of the large enterprises set on foot a few years since , are those generally reached by ...
... deposits are held in reserve , and exploratory la- bors maintained well in advance of extraction . In strong contrast with the unfortunate results of the large enterprises set on foot a few years since , are those generally reached by ...
Halaman 22
... deposits deeply buried in the beds of the pliocene rivers , with vast banks of auriferous gravel , some of them several hundred feet deep , all of which , though useless to the man without means , can , with the aid of capital , be made ...
... deposits deeply buried in the beds of the pliocene rivers , with vast banks of auriferous gravel , some of them several hundred feet deep , all of which , though useless to the man without means , can , with the aid of capital , be made ...
Halaman 25
... deposits about La Grange , very little of which could heretofore be worked for want of water . Several important enterprises of this kind are also in progress in Yuba , Butte , and adjoining counties , besides numerous works , some of ...
... deposits about La Grange , very little of which could heretofore be worked for want of water . Several important enterprises of this kind are also in progress in Yuba , Butte , and adjoining counties , besides numerous works , some of ...
Halaman 26
... deposits . So im- portant have these lower strata proved that they will cause more care- ful examinations to be made of the apparent bottoms of these auriferous channels hereafter . Large yields , strikes , nuggets , etc. - In the month ...
... deposits . So im- portant have these lower strata proved that they will cause more care- ful examinations to be made of the apparent bottoms of these auriferous channels hereafter . Large yields , strikes , nuggets , etc. - In the month ...
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Istilah dan frasa umum
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 metal metallurgy 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