Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side 8
... apparatus or some other device that furnishes oxygen as well as excludes the asphyxial gases . SULPHUR GASES IN METAL MINES AND TUNNELS In general , sulphur gases occur much more frequently and in much more dangerous concentrations in ...
... apparatus or some other device that furnishes oxygen as well as excludes the asphyxial gases . SULPHUR GASES IN METAL MINES AND TUNNELS In general , sulphur gases occur much more frequently and in much more dangerous concentrations in ...
Side 11
... apparatus should be worn if respiratory protection is sought . Fires involving heavily insulated electric power cables or wires also give off fumes that contain high percentages of poisonous gases , including carbon monoxide ...
... apparatus should be worn if respiratory protection is sought . Fires involving heavily insulated electric power cables or wires also give off fumes that contain high percentages of poisonous gases , including carbon monoxide ...
Side 18
... apparatus for oxygen , carbon dioxide , carbon monoxide , and methane and the nitrogen determined by difference.22 The Orsat apparatus is accurate to within about 0.2 in the percentage found . TYPES OF DETECTORS Methane is ordinarily ...
... apparatus for oxygen , carbon dioxide , carbon monoxide , and methane and the nitrogen determined by difference.22 The Orsat apparatus is accurate to within about 0.2 in the percentage found . TYPES OF DETECTORS Methane is ordinarily ...
Side 20
... apparatus of types approved by the United States Bureau of Mines furnishes such protection . The bureau has published numerous papers regard- ing the safe and proper use of oxygen breathing apparatus in mines.30 A few of the important ...
... apparatus of types approved by the United States Bureau of Mines furnishes such protection . The bureau has published numerous papers regard- ing the safe and proper use of oxygen breathing apparatus in mines.30 A few of the important ...
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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.