Silver and Gold: An Account of the Mining and Metallurgical Industries of the United States |
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Halaman 17
... passed through a sluice to tailing bed , 190 feet . The tailings being deposited , the water was drawn off at the top , flowing into a well , where it was raised and passed through a sluice 120 feet to tank at battery . This is the tank ...
... passed through a sluice to tailing bed , 190 feet . The tailings being deposited , the water was drawn off at the top , flowing into a well , where it was raised and passed through a sluice 120 feet to tank at battery . This is the tank ...
Halaman 27
... passed an act appointing Prof. J. D. Whitney State geologist , and authorizing him to make an accurate and complete geological survey of the State . Prof. Whitney was engaged at the time his commission reached him in mak- ing a survey ...
... passed an act appointing Prof. J. D. Whitney State geologist , and authorizing him to make an accurate and complete geological survey of the State . Prof. Whitney was engaged at the time his commission reached him in mak- ing a survey ...
Halaman 39
... passed into the ore without any loss of oxygen by combustion , and that the wood is con- verted into charcoal before it reaches the fires , to be used as fuel . These are two important points . Generally when air is introduced it passes ...
... passed into the ore without any loss of oxygen by combustion , and that the wood is con- verted into charcoal before it reaches the fires , to be used as fuel . These are two important points . Generally when air is introduced it passes ...
Halaman 40
... passing through . In connection with the furnace , A , and revolving cylinder , K , is the dust - chamber , B. The heavy ore passes from the cylinder , K , into this chamber , and is taken away from the doors below . The light dust is ...
... passing through . In connection with the furnace , A , and revolving cylinder , K , is the dust - chamber , B. The heavy ore passes from the cylinder , K , into this chamber , and is taken away from the doors below . The light dust is ...
Halaman 43
... passing down through the tube used as a drill - rod , and up on the outside of this tube , keeps the hole clean and the drill - head cool . The expense and the time required for sinking a shaft are by this method both greatly reduced ...
... passing down through the tube used as a drill - rod , and up on the outside of this tube , keeps the hole clean and the drill - head cool . The expense and the time required for sinking a shaft are by this method both greatly reduced ...
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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 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