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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Zadetki 1–5 od 100
Stran iii
... given of the discovery of occurrences of metals and ores throughout the United States , the period covered extending from the earliest known records , including legends , up to the present time . This account has further been ...
... given of the discovery of occurrences of metals and ores throughout the United States , the period covered extending from the earliest known records , including legends , up to the present time . This account has further been ...
Stran iv
... given with references , thus enabling the reader to extend his information by application to the original sources ... given in detail , being considered as a whole , with the various other producing countries and by individual states ...
... given with references , thus enabling the reader to extend his information by application to the original sources ... given in detail , being considered as a whole , with the various other producing countries and by individual states ...
Stran 6
... given to commerce . A very material rise in price of certain articles , especially those required in the mining regions of California and Australia , was the immediate effect ; and further , what was ultimately to be of great importance ...
... given to commerce . A very material rise in price of certain articles , especially those required in the mining regions of California and Australia , was the immediate effect ; and further , what was ultimately to be of great importance ...
Stran 8
... given to the iron trade in England in 1830-40 , by the construction of 3000 miles of railroad , raised the production of pig iron from 677,417 tons to 1,396,400 tons in 1840. She mined about 50,000 tons of coal , made 11,500 tons of ...
... given to the iron trade in England in 1830-40 , by the construction of 3000 miles of railroad , raised the production of pig iron from 677,417 tons to 1,396,400 tons in 1840. She mined about 50,000 tons of coal , made 11,500 tons of ...
Stran 13
... given quantity of new gold from the earth does more real good to the com- munity than do the business transactions of any similar body of men engaged in any other occupation , because the gold so raised by the miners becomes an ...
... given quantity of new gold from the earth does more real good to the com- munity than do the business transactions of any similar body of men engaged in any other occupation , because the gold so raised by the miners becomes an ...
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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