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 25
... contain large veins of turquoise " ( green silicate of copper ) .2 Mention is made in the same connection " of the existence of gold on St. Joseph's island , and that the rivers of Lake Superior bring down grains of gold . " It is ...
... contain large veins of turquoise " ( green silicate of copper ) .2 Mention is made in the same connection " of the existence of gold on St. Joseph's island , and that the rivers of Lake Superior bring down grains of gold . " It is ...
Stran 26
... contained some gold . In 1516 and 1519 , Diego Miruelo and Pineda reported the presence of gold and the fact that some the was secured latter especially while cruising along the western side of Florida and along the Texan coast . In ...
... contained some gold . In 1516 and 1519 , Diego Miruelo and Pineda reported the presence of gold and the fact that some the was secured latter especially while cruising along the western side of Florida and along the Texan coast . In ...
Stran 83
... contain silver . No great success rewarded these early efforts until the discovery of rich silver ore was made in the Travona in 1876. * The ores were shipped to Salt Lake City and attracted the atten- tion of capitalists which led to ...
... contain silver . No great success rewarded these early efforts until the discovery of rich silver ore was made in the Travona in 1876. * The ores were shipped to Salt Lake City and attracted the atten- tion of capitalists which led to ...
Stran 100
... contain auriferous sands . The idea which occurs to one examining the vicinity of Corozal is that that valley was ... containing from 8 to 10 grams ( 123 to 154 grains ) of pure gold . In the jurisdiction of Corozal some wash- ing ...
... contain auriferous sands . The idea which occurs to one examining the vicinity of Corozal is that that valley was ... containing from 8 to 10 grams ( 123 to 154 grains ) of pure gold . In the jurisdiction of Corozal some wash- ing ...
Stran 101
... containing some silver have been found , ' and on March 29 , of the following year they wrote , ' With respect to the silver mines here discovered we arranged that that mineral be fused here , but there is no person who knows how to do ...
... containing some silver have been found , ' and on March 29 , of the following year they wrote , ' With respect to the silver mines here discovered we arranged that that mineral be fused here , but there is no person who knows how to do ...
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