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 10
... later have to borrow more than timber . stage we will make less money , which will be far from an evil , for it may oblige us to replace some of our pelf with humility and meek- ness of spirit . " As our resources fail , however , we ...
... later have to borrow more than timber . stage we will make less money , which will be far from an evil , for it may oblige us to replace some of our pelf with humility and meek- ness of spirit . " As our resources fail , however , we ...
Stran 15
... later institutions , have taken to the pick and the shovel and the drill , and have worked their way up and made their influ- ence felt in the development of American mining . More recently other mining schools have been established in ...
... later institutions , have taken to the pick and the shovel and the drill , and have worked their way up and made their influ- ence felt in the development of American mining . More recently other mining schools have been established in ...
Stran 22
... later , exchanged native silver with the white men in barter for other goods . Further , it is related that the silver thus obtained had been smelted or reduced into a rough bullion by a process unknown to the white men . The veins from ...
... later , exchanged native silver with the white men in barter for other goods . Further , it is related that the silver thus obtained had been smelted or reduced into a rough bullion by a process unknown to the white men . The veins from ...
Stran 23
... later date , if not before , is shown by the fact that two Laplander reindeer herders desert- ing from the Government station at Port Clearance in the fall of 1898 , stopped with Esquimaux at Cape Rodney on their way to St. Michael ...
... later date , if not before , is shown by the fact that two Laplander reindeer herders desert- ing from the Government station at Port Clearance in the fall of 1898 , stopped with Esquimaux at Cape Rodney on their way to St. Michael ...
Stran 30
... later , when a United States Government post was established , it was turned to Los Angeles and San Francisco.1 The monks of the order of St. Francis at El Paso are credited with the discovery of mines in 1680 , which were worked ...
... later , when a United States Government post was established , it was turned to Los Angeles and San Francisco.1 The monks of the order of St. Francis at El Paso are credited with the discovery of mines in 1680 , which were worked ...
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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