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 17
... contain , as some may be in the form of chlorides which move off in the water . But to the tests of our gold mining ... contains . From these data of loss we must come to the conclusion that gold mining , not only in California , but ...
... contain , as some may be in the form of chlorides which move off in the water . But to the tests of our gold mining ... contains . From these data of loss we must come to the conclusion that gold mining , not only in California , but ...
Halaman 18
... contain it . All , however , admit it to be difficult to extract the gold from iron sulphurets , forgetting that even a small percentage of lead , copper , arsenic , or antimony , which is to be found in nearly all the gold ores of ...
... contain it . All , however , admit it to be difficult to extract the gold from iron sulphurets , forgetting that even a small percentage of lead , copper , arsenic , or antimony , which is to be found in nearly all the gold ores of ...
Halaman 39
... contain sickening properties , they will soon pay for themselves . They are also admirably adapted for working slums ... contains a large proportion of sulphurets , the heated air may be passed over it by means of the blower and pipe and ...
... contain sickening properties , they will soon pay for themselves . They are also admirably adapted for working slums ... contains a large proportion of sulphurets , the heated air may be passed over it by means of the blower and pipe and ...
Halaman 40
... contains the ore , through the chamber , F , and an oxidizing heat produced . In communication with the chamber , F , opposite the blast - pipe , h , is the revolving cylin- der , K , into which the ore is fed through the hopper , L ...
... contains the ore , through the chamber , F , and an oxidizing heat produced . In communication with the chamber , F , opposite the blast - pipe , h , is the revolving cylin- der , K , into which the ore is fed through the hopper , L ...
Halaman 50
... containing several of the most productive mines , has been involved in a litigation which has temporarily suspended ... contains nu- merous dikes of traps , porphyritic green - stone , 50 MINING STATISTICS WEST OF THE ROCKY MOUNTAINS .
... containing several of the most productive mines , has been involved in a litigation which has temporarily suspended ... contains nu- merous dikes of traps , porphyritic green - stone , 50 MINING STATISTICS WEST OF THE ROCKY MOUNTAINS .
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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 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