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 v
... North Shore , Canada , and the South Shore , the United States ) . RECENT HISTORY BY STATES AND TERRITORIES Alabama , Alaska , Arizona , Arkansas , California , The Carolinas , Colorado , Connecticut , Georgia , Idaho , Illinois ...
... North Shore , Canada , and the South Shore , the United States ) . RECENT HISTORY BY STATES AND TERRITORIES Alabama , Alaska , Arizona , Arkansas , California , The Carolinas , Colorado , Connecticut , Georgia , Idaho , Illinois ...
Stran 1
... North America had its beginnings in the southern portions of the vast area extending from the Tropics to the frozen fastnesses of the Frigid Zone . These beginnings , though small , rapidly grew to great importance , and were directly ...
... North America had its beginnings in the southern portions of the vast area extending from the Tropics to the frozen fastnesses of the Frigid Zone . These beginnings , though small , rapidly grew to great importance , and were directly ...
Stran 16
... North Carolina , Virginia , and others . These various mining schools and departments are now annually turning out a number of young men who are trained in the theory of mining and metallurgy , and these also are going into the field ...
... North Carolina , Virginia , and others . These various mining schools and departments are now annually turning out a number of young men who are trained in the theory of mining and metallurgy , and these also are going into the field ...
Stran 20
... North American continent were found and are yet to be seen in the Southern coastal States and those States and Territories bordering on Mexico , both of which localities were formerly occupied by the Spanish . Further , similar ...
... North American continent were found and are yet to be seen in the Southern coastal States and those States and Territories bordering on Mexico , both of which localities were formerly occupied by the Spanish . Further , similar ...
Stran 27
... north , and to Lake Charles , Louisiana , on the east , being sub- divided into twelve provinces , or intendencias , which were still further subdivided into thirty - seven mineral districts each , known as disputaciones de minera ...
... north , and to Lake Charles , Louisiana , on the east , being sub- divided into twelve provinces , or intendencias , which were still further subdivided into thirty - seven mineral districts each , known as disputaciones de minera ...
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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