Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side
... humid- Carbon monoxide in metal ity .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory ...
... humid- Carbon monoxide in metal ity .. mines_ Burning materials__ Combustible rock minerals_ Explosives-- Miscellaneous gases in metal mines__ Detection of gases- gases . Conclusions . Sampling air_ Types of detectors . - Respiratory ...
Side 16
... HUMIDITY Although finely divided dust in mines is probably the chief cause of miners ' consumption , it is now recognized that there may be other factors of almost equal influence , such as high temperatures and humidities , harmful ...
... HUMIDITY Although finely divided dust in mines is probably the chief cause of miners ' consumption , it is now recognized that there may be other factors of almost equal influence , such as high temperatures and humidities , harmful ...
Side 17
... humidity of 95 per cent and a temperature of 87 ° F. increased the amount of work performed 46 per cent by the mere expedient of installing a small fan to move or stir the air , showing that high humidity in itself is not particularly ...
... humidity of 95 per cent and a temperature of 87 ° F. increased the amount of work performed 46 per cent by the mere expedient of installing a small fan to move or stir the air , showing that high humidity in itself is not particularly ...
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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.