Gold and Silver: Comprising an Economic History of Mining in the United States, the Geographical and Geological Occurrence of the Precious Metals, with Their Mineralogical Associations, History and Description of Methods of Mining and Extraction of Values, and a Detailed Discussion of the Production of Gold and Silver in the World and the United StatesJ. Wiley & Sons, 1908 - 727 strani |
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Stran 17
... ounces of silver , 2,000,000 to 2,250,000 ounces of gold , 350,000,000 to 400,000,000 pounds of copper , 170,000 short tons of lead , 90,000 short tons of zinc , quicksilver to the amount of 36,000 flasks , more than 500,000 to ...
... ounces of silver , 2,000,000 to 2,250,000 ounces of gold , 350,000,000 to 400,000,000 pounds of copper , 170,000 short tons of lead , 90,000 short tons of zinc , quicksilver to the amount of 36,000 flasks , more than 500,000 to ...
Stran 36
... ounces of gold from the Indians , who had collected it unaided by white men . This led to the sending of a report by Governor Douglas , which was responsible for another great mining excitement and stampede , and it is estimated that ...
... ounces of gold from the Indians , who had collected it unaided by white men . This led to the sending of a report by Governor Douglas , which was responsible for another great mining excitement and stampede , and it is estimated that ...
Stran 53
... ounces silver per ton . Mention is made in a report of the Arkansas Geological Survey of the finding of a deposit of limonite , bearing gold and silver , about the year 1887. This occurs in Saline County , and the presence of the metals ...
... ounces silver per ton . Mention is made in a report of the Arkansas Geological Survey of the finding of a deposit of limonite , bearing gold and silver , about the year 1887. This occurs in Saline County , and the presence of the metals ...
Stran 56
... ounces of this gold quartz , he carefully wrapped it in a piece of buckskin . He , however , failed to survive the passage of the mountains and was buried , and with him the gold he had collected . But why none of the surviving members ...
... ounces of this gold quartz , he carefully wrapped it in a piece of buckskin . He , however , failed to survive the passage of the mountains and was buried , and with him the gold he had collected . But why none of the surviving members ...
Stran 62
... ounces were collected . The veins from which the nugget originally came were discovered in 1831 . From 1804 to 1827 , North Carolina furnished all the gold pro- duced in the United States , which amounted to something like $ 110,000 ...
... ounces were collected . The veins from which the nugget originally came were discovered in 1831 . From 1804 to 1827 , North Carolina furnished all the gold pro- duced in the United States , which amounted to something like $ 110,000 ...
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Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende bornite calcite California Carolina cent chalcopyrite chloride chlorination Colorado Comstock lode concentration considerable copper country-rock County Cripple Creek cyanide cyanide process Deep Mines deposits depth diorite discovered discovery district dollars drift employed extraction feet free-gold furnace galena gangue gneiss gold and silver gold production Gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho inches iron Jour lead limestone located mercury method Mexico mill Mineral Industry Mineral Resources Mines and Minerals Montana Mountain Nevada North occur operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite pyrrhotite quantities quartz quartz-veins quartzites Rept rhyolite River rocks schists shaft siliceous silver production Silver-bearing slate sluices smelting solution South stamps stope sulphides sulphurets surface TABLE tellurides tellurium tetrahedrite timber tion tons Total tunnel Utah yield zinc