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
... Lake Superior Region ( the 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 ...
... Lake Superior Region ( the 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 ...
Stran xi
... Lake Sup . Inst . Min . Engrs . Transactions Lake Superior Institute Mining Engineers . Trans . Wis . Acad . Sci . Arts and Letters.- Transactions Wisconsin Academy of Science , Arts and Letters . Am . Jour . Sci . -American Journal of ...
... Lake Sup . Inst . Min . Engrs . Transactions Lake Superior Institute Mining Engineers . Trans . Wis . Acad . Sci . Arts and Letters.- Transactions Wisconsin Academy of Science , Arts and Letters . Am . Jour . Sci . -American Journal of ...
Stran 9
... Lake Superior district . 66 Among the strange contradictions is the persistency with which the copper - and - brass trade has adhered to the Naugatuck Valley in Connecticut . Some of our large iron works are now also in ill - suited ...
... Lake Superior district . 66 Among the strange contradictions is the persistency with which the copper - and - brass trade has adhered to the Naugatuck Valley in Connecticut . Some of our large iron works are now also in ill - suited ...
Stran 10
... Lake Superior region has created a lake marine service which is shared in like measure by the grain , lumber and fuel industries . The tremendous advantage of the development of a mineral or fuel industry , as for instance the oil ...
... Lake Superior region has created a lake marine service which is shared in like measure by the grain , lumber and fuel industries . The tremendous advantage of the development of a mineral or fuel industry , as for instance the oil ...
Stran 11
... captivated the venturesome in search of 1 Min . and Sci . Press , Vol . 42 , p . 88 ― ' Trans . Lake Superior Min . Inst . , 1894 , pp . 17 , 18 . wealth , when the every - day , familiar object PRECIOUS METAL MINING . 11.
... captivated the venturesome in search of 1 Min . and Sci . Press , Vol . 42 , p . 88 ― ' Trans . Lake Superior Min . Inst . , 1894 , pp . 17 , 18 . wealth , when the every - day , familiar object PRECIOUS METAL MINING . 11.
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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