Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 19
... metals was a business with which our people were wholly unacquainted at the outset . When we embarked in this pursuit , one naturally beset with obstacles and full of inherent difficulty , we had everything to prepare and everything to ...
... metals was a business with which our people were wholly unacquainted at the outset . When we embarked in this pursuit , one naturally beset with obstacles and full of inherent difficulty , we had everything to prepare and everything to ...
الصفحة 20
... metals for the entire coast has , of course , been greatly curtailed in con- sequence of the restricted amount of ... metal- lurgical processes and labor - saving contrivances , the profit margin is being steadily enlarged in ...
... metals for the entire coast has , of course , been greatly curtailed in con- sequence of the restricted amount of ... metal- lurgical processes and labor - saving contrivances , the profit margin is being steadily enlarged in ...
الصفحة 23
... metal into white - lead superior to any now made . The working force consists of 130 men , divided into two gangs , 65 being employed all day and 65 all night . These people receive liberal wages , and have steady employment the year ...
... metal into white - lead superior to any now made . The working force consists of 130 men , divided into two gangs , 65 being employed all day and 65 all night . These people receive liberal wages , and have steady employment the year ...
الصفحة 26
... metal has been liberated from its matrix , and they , together with the inclosing slates , can now be readily torn down and washed away by the hydraulic pro- cess . Some of these slates have already been successfully worked in this ...
... metal has been liberated from its matrix , and they , together with the inclosing slates , can now be readily torn down and washed away by the hydraulic pro- cess . Some of these slates have already been successfully worked in this ...
الصفحة 36
... metal in value than we had gained by all the several previous working , though very carefully done . The bullion by last working , as per certificate of California Assay office , was 999-1,000 fine . We have now commenced on the " Lang ...
... metal in value than we had gained by all the several previous working , though very carefully done . The bullion by last working , as per certificate of California Assay office , was 999-1,000 fine . We have now commenced on the " Lang ...
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50 feet amalgam amount antimony arrastra assay average Bannack base bullion bed-rock bullion Calaveras County California Cañon 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