Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 23
... length , conduct it thence into the mining regions lying adjacent to Bear River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly three ...
... length , conduct it thence into the mining regions lying adjacent to Bear River and the north and mid- dle forks of the American and their several tributaries , bringing a por- tion of it on to San Francisco , distant nearly three ...
Halaman 24
... length , containing numerous towns and mining camps , creating a demand for from ten to twenty thousand inches , at a price of ten cents per inch for ten hours ' use , independent of the large amount needed by the company in working its ...
... length , containing numerous towns and mining camps , creating a demand for from ten to twenty thousand inches , at a price of ten cents per inch for ten hours ' use , independent of the large amount needed by the company in working its ...
Halaman 41
... length of time required to drive a long tunnel ) is obviated . All over the Pacific coast are innumerable mines that will almost pay for working by the ordinary method , which , by the use of these drills , can be made to yield a large ...
... length of time required to drive a long tunnel ) is obviated . All over the Pacific coast are innumerable mines that will almost pay for working by the ordinary method , which , by the use of these drills , can be made to yield a large ...
Halaman 44
... length required to reach the bottom of the hole , and may be of any length , from one foot to six feet or more . This small size enables it to be used in any tunnel , shaft , or place in a mine where a miner can enter , and is so ...
... length required to reach the bottom of the hole , and may be of any length , from one foot to six feet or more . This small size enables it to be used in any tunnel , shaft , or place in a mine where a miner can enter , and is so ...
Halaman 48
... length of about seventy- five miles , from Bear Valley , Mariposa County , to Amador City , Ama- dor County . Throughout the entire distance it has a general northwest and southeast course , and an almost uniform dip to the northeast of ...
... length of about seventy- five miles , from Bear Valley , Mariposa County , to Amador City , Ama- dor County . Throughout the entire distance it has a general northwest and southeast course , and an almost uniform dip to the northeast of ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Caņon 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