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 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 4
... would have reached the coast of California . From California the pioneers passed to the north and eastward , 1 Min . and Sci . Press , Vol . 54 , p . 124 . penetrating the territories of Washington , Oregon , Montana , 4 GOLD AND SILVER .
... would have reached the coast of California . From California the pioneers passed to the north and eastward , 1 Min . and Sci . Press , Vol . 54 , p . 124 . penetrating the territories of Washington , Oregon , Montana , 4 GOLD AND SILVER .
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 26
... North America now occupied by the United States antedate its colonization , as is shown by the following account by localities . — The East and Southeast The Southern Appalachian States . The first authentic statement relative to the ...
... North America now occupied by the United States antedate its colonization , as is shown by the following account by localities . — The East and Southeast The Southern Appalachian States . The first authentic statement relative to the ...
Druge izdaje - Prikaži vse
Pogosti izrazi in povedi
Alaska amalgamation andesite argentiferous assay auriferous average bed-rock blende calcite California Carolina cent chalcopyrite chlorination Colorado Comstock lode 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 gold and silver gold production gold-bearing granite gravel gray copper Gulch Hill hydraulic Ibid Idaho igneous rocks inches iron Jour lead limestone located mercury method Mexico mill Mineral Industry Mineral Resources Mines and Minerals Montana Mountain Nevada North North Carolina occur operations ore-bodies ounces output oxide placer mines placers porphyry precious metals Press probably production of gold pyrite quantities quartz quartz-veins Rept River roasting rocks schists shaft silver production Silver-bearing slate sluices smelting solution South stamps stope sulphides sulphurets surface TABLE tellurides tellurium tetrahedrite timber tion tons Total tunnel usually Utah veins width yield zinc