Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory protection against II.
... .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory protection against II.
Side 4
... Samples of air from the tunnel were analyzed and found to contain appreciable percentages of methane . 3. In 1914 , while sinking for a foundation for a bridge over the Mississippi River , nine men in a caisson were killed by an ...
... Samples of air from the tunnel were analyzed and found to contain appreciable percentages of methane . 3. In 1914 , while sinking for a foundation for a bridge over the Mississippi River , nine men in a caisson were killed by an ...
Side 5
... samples were taken with vacuum bottles about 1 foot below the collar of the winze and analyzed by the Pittsburgh laboratory of the United States Bureau of Mines . The analysis showed 49.2 per cent of carbon dioxide , 10.8 per cent of ...
... samples were taken with vacuum bottles about 1 foot below the collar of the winze and analyzed by the Pittsburgh laboratory of the United States Bureau of Mines . The analysis showed 49.2 per cent of carbon dioxide , 10.8 per cent of ...
Side 6
... samples collected by means of a vacuum bottle in the shaft showed less than 0.3 per cent of oxygen , per cent of carbon dioxide , and 81 per cent of nitrogen , although the air in this same shaft had been entirely free of gas a few ...
... samples collected by means of a vacuum bottle in the shaft showed less than 0.3 per cent of oxygen , per cent of carbon dioxide , and 81 per cent of nitrogen , although the air in this same shaft had been entirely free of gas a few ...
Side 7
... samples of various rocks from the district sealed in glass carboys with atmos- pheric air and ordinary tap water or mine water showed that gases similar to those found in the mine could be produced in the carboys . The action of water ...
... samples of various rocks from the district sealed in glass carboys with atmos- pheric air and ordinary tap water or mine water showed that gases similar to those found in the mine could be produced in the carboys . The action of water ...
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Vanlige uttrykk og setninger
activated iodine pentoxide adequate amounts asphyxial asphyxial gases atmosphere Bull Bureau of Mines burning candle carbide lamp carbon dioxide carbon monoxide cent of carbon cent of oxygen Circ circulation of air coal mines combustible material decidedly dangerous deficient in oxygen dioxide and nitrogen dry-bulb temperatures efficiency electric arc explosive gas extinguished fire hazards flame safety lamp found in metal gas mask GASES FOUND gases high GASES IN METAL Gilpin County Harrington high in carbon hydrogen sulphide ignitions of methane inflammable inhaled Investigations killed metal mines metal-mine blasting metal-mine fires miners numerous open light oxides of nitrogen oxygen breathing apparatus oxygen content palladium chloride percentage of carbon poisonous gases PRECAUTIONS AGAINST GASES Pyrotannic Acid Method quantities relative humidity Rept respiratory protection result rock Rock-Strata Gases Sayers SCOTT TURNER shallow shafts strata sulphur dioxide sulphur gases Tech tested tion tunnel type N gas underground United States Bureau unventilated winze workers Yant
Populære avsnitt
Side 5 - ... are a result of the action of atmospheric air and mine water upon the sulphides and carbonates in the fissured rock.
Side 9 - Some of the heaviest losses of life in metal-mine fires have resulted from the burning of less than a railroad freight car or only a few cords of timber.