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 98
Stran 8
... copper , about 58,000 tons of 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 ...
... copper , about 58,000 tons of 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 ...
Stran 9
... copper largely draws her coke from Pennsylvania , or from ovens on Lake Superior fed with Pennsylvania coal . The Copper Queen , after depending on coke at exorbitant rates , now brings it at one - third the cost from northern New ...
... copper largely draws her coke from Pennsylvania , or from ovens on Lake Superior fed with Pennsylvania coal . The Copper Queen , after depending on coke at exorbitant rates , now brings it at one - third the cost from northern New ...
Stran 17
... Copper now ranks second in the value of its product , the more important metals ranging in 1900 as follows : Pig iron , $ 260,000,000 ; copper , $ 98,500,000 ; gold , $ 79,000,000 ; silver , $ 74,500,000 ; lead , $ 23,560,000 ; and zinc ...
... Copper now ranks second in the value of its product , the more important metals ranging in 1900 as follows : Pig iron , $ 260,000,000 ; copper , $ 98,500,000 ; gold , $ 79,000,000 ; silver , $ 74,500,000 ; lead , $ 23,560,000 ; and zinc ...
Stran 21
... copper was the Lake Superior mines.3 Lemoyne in his Brevis Narratio of the journey made by Laudon- nière in 1564 says : " That chief sent me a sheet of copper dug from those mountains ( Appalachian ) , from the base of which flows a ...
... copper was the Lake Superior mines.3 Lemoyne in his Brevis Narratio of the journey made by Laudon- nière in 1564 says : " That chief sent me a sheet of copper dug from those mountains ( Appalachian ) , from the base of which flows a ...
Stran 24
... copper they extracted from the pits could hardly have been transported in the light Indian canoes of to - day . There might , however , have been another people possessed of wooden boats , known to the ancestors of the present Indians ...
... copper they extracted from the pits could hardly have been transported in the light Indian canoes of to - day . There might , however , have been another people possessed of wooden boats , known to the ancestors of the present Indians ...
Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
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