Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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الصفحة 17
... contain , as some may be in the form of chlorides which move off in the water . But to the tests of our gold ... 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 ... contains . From these data of loss we must come to the conclusion that gold mining , not only in California , but ...
الصفحة 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 ...
الصفحة 28
... contain a systematic descrip- tion of the geology of California , arranged in chronological order of the formations ; while the other would be devoted to a discussion of the character , mode of occurrence , and value of the useful ...
... contain a systematic descrip- tion of the geology of California , arranged in chronological order of the formations ; while the other would be devoted to a discussion of the character , mode of occurrence , and value of the useful ...
الصفحة 39
... contain sickening properties , they will soon pay for themselves . They are also admirably adapted for working ... 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 ... contains a large proportion of sulphurets , the heated air may be passed over it by means of the blower and pipe and ...
الصفحة 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 ...
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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