Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side 2
... similar purpose . In gold - silver properties in Gilpin County , Colo . , numerous igni- tions of methane have resulted from open lights , especially while long - abandoned shafts were being unwatered . Similar methane igni- tions have ...
... similar purpose . In gold - silver properties in Gilpin County , Colo . , numerous igni- tions of methane have resulted from open lights , especially while long - abandoned shafts were being unwatered . Similar methane igni- tions have ...
Side 3
... similar noncoal - mining opera- tions in sedimentary formations . Hydrogen has been found in gases coming out of drill holes in South African gold mines and in a potash mine in New Mexico ; this gas also has been found , usually in ...
... similar noncoal - mining opera- tions in sedimentary formations . Hydrogen has been found in gases coming out of drill holes in South African gold mines and in a potash mine in New Mexico ; this gas also has been found , usually in ...
Side 6
... similar gas occurrences were investigated in the Cripple Creek gold - mining district of Colorado . " Here the coroner's records show that at least 35 lives have been lost by suffocation in irrespir- able gases during some 25 years of ...
... similar gas occurrences were investigated in the Cripple Creek gold - mining district of Colorado . " Here the coroner's records show that at least 35 lives have been lost by suffocation in irrespir- able gases during some 25 years of ...
Side 7
... similar to those found in the mine could be produced in the carboys . The action of water and air upon the rocks for two or three days produced appreciable percentages of carbon dioxide and decreased the oxygen content of the air ...
... similar to those found in the mine could be produced in the carboys . The action of water and air upon the rocks for two or three days produced appreciable percentages of carbon dioxide and decreased the oxygen content of the air ...
Side 10
... similar drive for pumps or hoists has no place underground and should not be allowed there ; gasoline trucks should not be allowed to go into mines to pull out mineral products , and the use of steam locomotives , occasionally found in ...
... similar drive for pumps or hoists has no place underground and should not be allowed there ; gasoline trucks should not be allowed to go into mines to pull out mineral products , and the use of steam locomotives , occasionally found in ...
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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.