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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Stran iii
... importance in a work of this character , its treatment has been broad and it has been approached from practically every side . In the chapter of the history of the ... important and valuable data regarding the occurrence in the various iii.
... importance in a work of this character , its treatment has been broad and it has been approached from practically every side . In the chapter of the history of the ... important and valuable data regarding the occurrence in the various iii.
Stran iv
... important and valuable data regarding the occurrence in the various states and districts and supplement the facts given with references , thus enabling the reader to extend his information by application to the original sources . The ...
... important and valuable data regarding the occurrence in the various states and districts and supplement the facts given with references , thus enabling the reader to extend his information by application to the original sources . The ...
Stran 6
... important branches of that indus- try , namely , hydraulic mining . Through the contention by the agricultural and ... importance was a demand for means of transporting such supplies , together with the miners and traders passing to and ...
... important branches of that indus- try , namely , hydraulic mining . Through the contention by the agricultural and ... importance was a demand for means of transporting such supplies , together with the miners and traders passing to and ...
Stran 15
... 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 operating mining machinery ; and now the ...
... 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 operating mining machinery ; and now the ...
Stran 17
... important metals ranging in 1900 as follows : Pig iron , $ 260,000,000 ; copper , $ 98,500,000 ; gold , $ 79,000,000 ; silver , $ 74,500,000 ; lead , $ 23,560,000 ; and zinc , $ 10,650,000 . ” 1 The following summary of the yield of the ...
... important metals ranging in 1900 as follows : Pig iron , $ 260,000,000 ; copper , $ 98,500,000 ; gold , $ 79,000,000 ; silver , $ 74,500,000 ; lead , $ 23,560,000 ; and zinc , $ 10,650,000 . ” 1 The following summary of the yield of the ...
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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