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 65
Stran xi
... Engineering and Mining Journal . Mining and Scientific Press . S. G. S. Reports and Bulletins , United States T. A. I. M. E. - Transactions American Institute Mining Engineers . Am . Jour . Min . American Journal of Mining . ― Inst ...
... Engineering and Mining Journal . Mining and Scientific Press . S. G. S. Reports and Bulletins , United States T. A. I. M. E. - Transactions American Institute Mining Engineers . Am . Jour . Min . American Journal of Mining . ― Inst ...
Stran 14
... engineer , that 1 T. A. I. M. E. , Vol . 33 , p . 828 . 2 Mineral Industry , Vol . 3 , p . 304 . 3 Eng . and Min . Jour . , Vol . 40 , p . 306 . these experts can to - day do much toward indicating 14 GOLD AND SILVER . SCIENCE.
... engineer , that 1 T. A. I. M. E. , Vol . 33 , p . 828 . 2 Mineral Industry , Vol . 3 , p . 304 . 3 Eng . and Min . Jour . , Vol . 40 , p . 306 . these experts can to - day do much toward indicating 14 GOLD AND SILVER . SCIENCE.
Stran 15
... engineers have of late made most important contributions to the mining industry , especially in the arid and semiarid regions , by the development of isolated water powers , transmitting this power many miles for the purpose of ...
... engineers have of late made most important contributions to the mining industry , especially in the arid and semiarid regions , by the development of isolated water powers , transmitting this power many miles for the purpose of ...
Stran 17
... and what is being done by the mining industry to advance our nation . " 1 Mines and Minerals , Vol . 23 , p . 219 . ' Colliery Engineer , Vol . 18 , p . 13 . The growth of the mining industry has been of direct PRECIOUS METAL MINING . 17.
... and what is being done by the mining industry to advance our nation . " 1 Mines and Minerals , Vol . 23 , p . 219 . ' Colliery Engineer , Vol . 18 , p . 13 . The growth of the mining industry has been of direct PRECIOUS METAL MINING . 17.
Stran 23
... engineering skill . However , this work must either have been carried on prior to the advent of the present race of people into the country , or was carried on with- out their knowledge , for the Esquimaux have no tradition regard- ing ...
... engineering skill . However , this work must either have been carried on prior to the advent of the present race of people into the country , or was carried on with- out their knowledge , for the Esquimaux have no tradition regard- ing ...
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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