Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side 8
... concentrations in metal mines and tunnels than in coal mines . There have been a number of occurrences ( some rela- tively recent ) of the decidedly dangerous hydrogen sulphide gas in comparatively shallow shafts for foundations for ...
... concentrations in metal mines and tunnels than in coal mines . There have been a number of occurrences ( some rela- tively recent ) of the decidedly dangerous hydrogen sulphide gas in comparatively shallow shafts for foundations for ...
Side 10
... concentrations of carbon monoxide and very low concentrations of oxygen but also high concentrations of various oxides of itrogen , the breathing of which is dangerous . There is PROPERTIES OF GASES 11 good reason to believe that metal ...
... concentrations of carbon monoxide and very low concentrations of oxygen but also high concentrations of various oxides of itrogen , the breathing of which is dangerous . There is PROPERTIES OF GASES 11 good reason to believe that metal ...
Side 12
... concentrations as low as 0.005 per cent ; immediate collapse usually is the result when one is exposed to 0.06 to 0.1 per cent of the gas ; and death ensues quickly when one is exposed to more than 0.1 per cent . SULPHUR DIOXIDE Sulphur ...
... concentrations as low as 0.005 per cent ; immediate collapse usually is the result when one is exposed to 0.06 to 0.1 per cent of the gas ; and death ensues quickly when one is exposed to more than 0.1 per cent . SULPHUR DIOXIDE Sulphur ...
Side 20
... concentrations of all dangerous gases encountered in mines , provided that there is enough oxygen in the air to support life . The United States Bureau of Mines has limited its approval of the type N gas mask in underground work to ...
... concentrations of all dangerous gases encountered in mines , provided that there is enough oxygen in the air to support life . The United States Bureau of Mines has limited its approval of the type N gas mask in underground work to ...
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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.