Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Resultat 1-5 av 9
Side 7
... 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 and air upon ...
... 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 and air upon ...
Side 8
... various oxides of nitrogen . In blasting material whose sulphur content exceeds 30 per cent of the whole explosions of sulphide ore dust ( chiefly sulphides of iron and copper ) have occurred ; the resultant gases are high in hydro- gen ...
... various oxides of nitrogen . In blasting material whose sulphur content exceeds 30 per cent of the whole explosions of sulphide ore dust ( chiefly sulphides of iron and copper ) have occurred ; the resultant gases are high in hydro- gen ...
Side 9
... various kinds of inflammation . CARBON MONOXIDE IN METAL MINES Probably more than 90 per cent of the fatalities from fires 10 in the metal mines of the United States ( the total lives so lost amounts to several hundred ) have been due ...
... various kinds of inflammation . CARBON MONOXIDE IN METAL MINES Probably more than 90 per cent of the fatalities from fires 10 in the metal mines of the United States ( the total lives so lost amounts to several hundred ) have been due ...
Side 10
... 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 10 GASES THAT OCCUR IN METAL MINES.
... 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 10 GASES THAT OCCUR IN METAL MINES.
Side 11
... Various parts of a mine may be deficient in oxygen ( that is , con- tain less than the normal amount found in the atmosphere ) , a condi- tion usually associated with the presence of carbon dioxide . The United States Bureau of Mines ...
... Various parts of a mine may be deficient in oxygen ( that is , con- tain less than the normal amount found in the atmosphere ) , a condi- tion usually associated with the presence of carbon dioxide . The United States Bureau of Mines ...
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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.