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 vi
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. CHAPTER III . OCCURRENCE AND ASSOCIATION OF GOLD AND SILVER . THEORY OF ORE FORMATION AND OCCURRENCE OF GOLD IN GRAVEL .. GENERAL DISCUSSION ...
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. CHAPTER III . OCCURRENCE AND ASSOCIATION OF GOLD AND SILVER . THEORY OF ORE FORMATION AND OCCURRENCE OF GOLD IN GRAVEL .. GENERAL DISCUSSION ...
Stran vii
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. PAGE Methods of Extracting in Masses . Surface pits or Glory Holes . Supplementary Mining Methods . - Mine Support . ber . - Timbering : Posts , Stulls ...
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. PAGE Methods of Extracting in Masses . Surface pits or Glory Holes . Supplementary Mining Methods . - Mine Support . ber . - Timbering : Posts , Stulls ...
Stran ix
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. LIST OF ILLUSTRATIONS . PAGE ... Method of Overhand Stoping at the Combination Mine , Nevada Mining with Square - Sets and Filling , Bunker Hill Lode ...
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. LIST OF ILLUSTRATIONS . PAGE ... Method of Overhand Stoping at the Combination Mine , Nevada Mining with Square - Sets and Filling , Bunker Hill Lode ...
Stran 28
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. mining camps or realitos . The ... method of acquiring the great store of precious metals which he brought back with him . If the current reports are ...
... Methods of Mining and Extraction of Values, and a Detailed D Walter Richard Crane. mining camps or realitos . The ... method of acquiring the great store of precious metals which he brought back with him . If the current reports are ...
Stran 71
... method originated in 1868 , although gravels had been washed for many years previous . At this time a combination method consisting of hydraulicing , sluicing and mill- ing was inaugurated in a number of the mines , being known as the ...
... method originated in 1868 , although gravels had been washed for many years previous . At this time a combination method consisting of hydraulicing , sluicing and mill- ing was inaugurated in a number of the mines , being known as the ...
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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