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 vii
... Yield of Ores by Districts and Mines 686 TABLE V. Yield of Gravels by Districts and Mines 710 • • TABLE VI . Fineness and Value of Gold and Silver . 712 • LIST OF ILLUSTRATIONS . PAGE . Gold Belt of the CONTENTS . vii.
... Yield of Ores by Districts and Mines 686 TABLE V. Yield of Gravels by Districts and Mines 710 • • TABLE VI . Fineness and Value of Gold and Silver . 712 • LIST OF ILLUSTRATIONS . PAGE . Gold Belt of the CONTENTS . vii.
Stran 17
... yield of the various mineral prod- ucts as late as 1897 , gives an idea of the growth of the mining indus- try and the development of the country.2 " If we fail in an appreciation of the extent of the mining in- dustry we are equally at ...
... yield of the various mineral prod- ucts as late as 1897 , gives an idea of the growth of the mining indus- try and the development of the country.2 " If we fail in an appreciation of the extent of the mining in- dustry we are equally at ...
Stran 41
... yield of gold there is no record , or indeed of anything in 1 Gold - Mining in the Southern Appalachian States . T. A. I. M. E. , Vol . 25 , p . 679 . 2 U. S. G. S. 20 Annual Rept . , pt . 6 , p . 112 . 3 Second Biennial Report on the ...
... yield of gold there is no record , or indeed of anything in 1 Gold - Mining in the Southern Appalachian States . T. A. I. M. E. , Vol . 25 , p . 679 . 2 U. S. G. S. 20 Annual Rept . , pt . 6 , p . 112 . 3 Second Biennial Report on the ...
Stran 43
... yield some fine gold but the Stewart yielded nothing , which is surprising seeing that it was later the scene of considerable excitement . Had they , however , ascended the river far enough , the results might have been considerably ...
... yield some fine gold but the Stewart yielded nothing , which is surprising seeing that it was later the scene of considerable excitement . Had they , however , ascended the river far enough , the results might have been considerably ...
Stran 50
... yield gold , silver , and lead . Some of the best placers worked in the territory were found in Yavapai County , in 1863 , and for several years the placers on Lynx Creek , the Big Bug , the Hassayampa , and a number of other streams ...
... yield gold , silver , and lead . Some of the best placers worked in the territory were found in Yavapai County , in 1863 , and for several years the placers on Lynx Creek , the Big Bug , the Hassayampa , and a number of other streams ...
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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