Bulletin, Utgave 347U.S. Government Printing Office, 1931 |
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Side 1
... region . Much more rarely relatively small percentages of ethane or other hydrocarbons with an odor of ether ... regions carbon dioxide flows into the mine , fills the workings , and overflows like water . In other regions high ...
... region . Much more rarely relatively small percentages of ethane or other hydrocarbons with an odor of ether ... regions carbon dioxide flows into the mine , fills the workings , and overflows like water . In other regions high ...
Side 2
... region . Gases from metal - mine fires include hydrogen sulphide , sulphur diox- ide , carbon monoxide , carbon dioxide , methane , and hydrogen , as well as oxides of arsenic , antimony , etc .; moreover , there is frequently a ...
... region . Gases from metal - mine fires include hydrogen sulphide , sulphur diox- ide , carbon monoxide , carbon dioxide , methane , and hydrogen , as well as oxides of arsenic , antimony , etc .; moreover , there is frequently a ...
Side 3
... region consisted of igneous rock and no sedimentary strata were present ; undoubtedly it comes from some high - temperature reactions between the timber in the fire area and the water introduced to fight the fire . Methane has been ...
... region consisted of igneous rock and no sedimentary strata were present ; undoubtedly it comes from some high - temperature reactions between the timber in the fire area and the water introduced to fight the fire . Methane has been ...
Side 5
... region . Gases that would extinguish a carbide lamp and have distinctive odors have been found in parts of the mine for years , occurring in greater quantity during the summer months . About 1,700 feet from the portal of the fourth ...
... region . Gases that would extinguish a carbide lamp and have distinctive odors have been found in parts of the mine for years , occurring in greater quantity during the summer months . About 1,700 feet from the portal of the fourth ...
Side 10
explosive gas such as methane accumulates and is ignited . In some regions carbonaceous shales or slates adjacent to ... region the oxygen content may be much less than 10 per cent and the carbon dioxide or nitrogen content relatively ...
explosive gas such as methane accumulates and is ignited . In some regions carbonaceous shales or slates adjacent to ... region the oxygen content may be much less than 10 per cent and the carbon dioxide or nitrogen content relatively ...
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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.