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 |
Iz vsebine knjige
Zadetki 1–5 od 100
Stran 8
... lead , and 4400 tons of tin . Since then her railroad mileage has increased to 22,700 , her production of pig iron to 9,000,000 tons ; her lead production , how- ever , has declined to 20,000 tons , and her production of copper has ...
... lead , and 4400 tons of tin . Since then her railroad mileage has increased to 22,700 , her production of pig iron to 9,000,000 tons ; her lead production , how- ever , has declined to 20,000 tons , and her production of copper has ...
Stran 17
... lead and zinc in the Mississippi Valley ; while coal is found in large quantities in almost every section of the country . " The greater development of our mining interests , like the greater development of the country itself , has ...
... lead and zinc in the Mississippi Valley ; while coal is found in large quantities in almost every section of the country . " The greater development of our mining interests , like the greater development of the country itself , has ...
Stran 33
... lead and coal mines are to be found all over California and it is equally doubtful whether , under their present owners , they will ever be worked . " " The implication here is that if the coun- try were only transferred to the American ...
... lead and coal mines are to be found all over California and it is equally doubtful whether , under their present owners , they will ever be worked . " " The implication here is that if the coun- try were only transferred to the American ...
Stran 50
... lead . Some of the best placers worked in the territory were found in Yavapai County , in 1863 , and for several years the placers on Lynx Creek , the Big Bug , the Hassayampa , and a number of other streams have yielded considerable ...
... lead . Some of the best placers worked in the territory were found in Yavapai County , in 1863 , and for several years the placers on Lynx Creek , the Big Bug , the Hassayampa , and a number of other streams have yielded considerable ...
Stran 70
... lead , copper , or tin , or any minerals as antimony , vitriol , black - lead , alum , salt , salt - springs , or any other the like , " and " to enjoy forever said mines , with the lands , woods , timber , and water within two or three ...
... lead , copper , or tin , or any minerals as antimony , vitriol , black - lead , alum , salt , salt - springs , or any other the like , " and " to enjoy forever said mines , with the lands , woods , timber , and water within two or three ...
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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