Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 18
... inches thick . Lay it out in 12 - inch squares , take a smaller quantity from each square , take samples thus obtained , and again mix them . Again spread out , say , one inch thick , laid out into 4 - inch squares , taking a smaller ...
... inches thick . Lay it out in 12 - inch squares , take a smaller quantity from each square , take samples thus obtained , and again mix them . Again spread out , say , one inch thick , laid out into 4 - inch squares , taking a smaller ...
الصفحة 24
... 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 own mines . 66 " Aside from the amount used in the mines , a vast quantity would be required for ...
... 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 own mines . 66 " Aside from the amount used in the mines , a vast quantity would be required for ...
الصفحة 31
... inches at Sacramento . It is now believed the fall for the season , October , 1871 , to May , 1872 , will reach thirty - six inches . The following table prepared by Mr. F. B. Pilling , of the United States Signal Service Corps of San ...
... inches at Sacramento . It is now believed the fall for the season , October , 1871 , to May , 1872 , will reach thirty - six inches . The following table prepared by Mr. F. B. Pilling , of the United States Signal Service Corps of San ...
الصفحة 32
... inches through a Hoskins pipe , with 432 feet head , and are now constructing a pipe to throw 2,000 inches . In fact , hydraulic mining is assuming proportions heretofore scarcely dreamed of . Quartz - crushing machinery . - In quartz ...
... inches through a Hoskins pipe , with 432 feet head , and are now constructing a pipe to throw 2,000 inches . In fact , hydraulic mining is assuming proportions heretofore scarcely dreamed of . Quartz - crushing machinery . - In quartz ...
الصفحة 42
... inches in diameter , ) which simply connects the water - pipe to the nozzle , which plays upon the water - wheel , and is geared to the drills upon the front end of the car . The car is then run back to a chamber in the tunnel , the ...
... inches in diameter , ) which simply connects the water - pipe to the nozzle , which plays upon the water - wheel , and is geared to the drills upon the front end of the car . The car is then run back to a chamber in the tunnel , the ...
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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