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 2
... owing to the Spanish - American wars , and a money famine resulted . The discoveries of gold in California and Australia soon followed , how- ever , and the stream of gold soon reached and passed the high mark previously attained , with ...
... owing to the Spanish - American wars , and a money famine resulted . The discoveries of gold in California and Australia soon followed , how- ever , and the stream of gold soon reached and passed the high mark previously attained , with ...
Stran 6
... Owing to the great increase in the production of gold which occurred during the middle of the last century a great impetus was given to commerce . A very material rise in price of certain articles , especially those required in the ...
... Owing to the great increase in the production of gold which occurred during the middle of the last century a great impetus was given to commerce . A very material rise in price of certain articles , especially those required in the ...
Stran 11
... owing to a falling off in production of the mines or a decrease in the market value of the metal mined , then the superfluous population begins to drain . off , and finally only the miners remain . Further , it is almost invari- ably ...
... owing to a falling off in production of the mines or a decrease in the market value of the metal mined , then the superfluous population begins to drain . off , and finally only the miners remain . Further , it is almost invari- ably ...
Stran 24
... owing to the large accumulations of débris in them , together with the extensive growth of timber . Furthermore , the masses of copper they extracted from the pits could hardly have been transported in the light Indian canoes of to ...
... owing to the large accumulations of débris in them , together with the extensive growth of timber . Furthermore , the masses of copper they extracted from the pits could hardly have been transported in the light Indian canoes of to ...
Stran 26
... owing to the more or less interrelated occurrence of events , requiring the constant reference to and remention of various localities in the same general region . The more trustworthy reports regarding the presence of gold in that ...
... owing to the more or less interrelated occurrence of events , requiring the constant reference to and remention of various localities in the same general region . The more trustworthy reports regarding the presence of gold in that ...
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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