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 17
... quantities in almost every section of the country . " The greater development of our mining interests , like the greater development of the country itself , has taken place during the past few decades . This is shown by the fact that ...
... quantities in almost every section of the country . " The greater development of our mining interests , like the greater development of the country itself , has taken place during the past few decades . This is shown by the fact that ...
Stran 22
... quantities in a province called Apalache.3 A Jesuit named Father Kino in 1701 revisited a station ( San Dyonisius ) on the Colorado River , above the mouth of the Gila , which he had established in 1700 , and states in his journal that ...
... quantities in a province called Apalache.3 A Jesuit named Father Kino in 1701 revisited a station ( San Dyonisius ) on the Colorado River , above the mouth of the Gila , which he had established in 1700 , and states in his journal that ...
Stran 35
... quantities have been found up to the present time . " It is evident then that the trading companies neither sought for minerals nor encouraged others to do so ; in fact , it is well known that their attention had in several instances ...
... quantities have been found up to the present time . " It is evident then that the trading companies neither sought for minerals nor encouraged others to do so ; in fact , it is well known that their attention had in several instances ...
Stran 36
... quantities was established beyond question and her ultimate development was assured , but as yet the vast unexplored interior remained an un- known quantity and offered an inviting field for the prospector . The later history of Alaska ...
... quantities was established beyond question and her ultimate development was assured , but as yet the vast unexplored interior remained an un- known quantity and offered an inviting field for the prospector . The later history of Alaska ...
Stran 37
... quantities . It is reported that gold also occurred with silver . Work here was abandoned in 1850 . In 1856-57 , the same company , under the superintendency of Mr. E. B. Borron , begun developing their location at Point Mamainse ...
... quantities . It is reported that gold also occurred with silver . Work here was abandoned in 1850 . In 1856-57 , the same company , under the superintendency of Mr. E. B. Borron , begun developing their location at Point Mamainse ...
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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