Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Resultat 1-5 av 14
Side 1
... carbon monoxide content is likely to be high ( 4 per cent or more ) , and if the coal contains much sulphur the fire fumes may contain some sulphur dioxide . GASES POSSIBLE IN METAL MINES Methane has been found in a number of metal ...
... carbon monoxide content is likely to be high ( 4 per cent or more ) , and if the coal contains much sulphur the fire fumes may contain some sulphur dioxide . GASES POSSIBLE IN METAL MINES Methane has been found in a number of metal ...
Side 5
... cent of carbon dioxide , 10.8 per cent of oxygen , and 40 per cent of nitrogen , with no methane . Although hydrogen sulphide gas was evidently present , as indicated by the characteristic odor of spoiled eggs , the amount was too small ...
... cent of carbon dioxide , 10.8 per cent of oxygen , and 40 per cent of nitrogen , with no methane . Although hydrogen sulphide gas was evidently present , as indicated by the characteristic odor of spoiled eggs , the amount was too small ...
Side 6
... 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 hours before . One idle mine of considerable extent was entirely free of gas during good ...
... 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 hours before . One idle mine of considerable extent was entirely free of gas during good ...
Side 7
... cent of carbon dioxide , whereas other gases were almost pure nitrogen and consequently so light that they accumulated in raises . NEVADA 8 In several Nevada mines gases high in nitrogen have been found to issue in quantities from ...
... cent of carbon dioxide , whereas other gases were almost pure nitrogen and consequently so light that they accumulated in raises . NEVADA 8 In several Nevada mines gases high in nitrogen have been found to issue in quantities from ...
Side 8
... carbon dioxide . When this reaction has continued until the oxygen contact of the air is below 10 per cent the condition of the atmosphere is decidedly dangerous , and when the oxygen content is below 5 per cent a few inhalations result ...
... carbon dioxide . When this reaction has continued until the oxygen contact of the air is below 10 per cent the condition of the atmosphere is decidedly dangerous , and when the oxygen content is below 5 per cent a few inhalations result ...
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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.