Miners' Circular, Utgaver 1-40U.S. Government Printing Office, 1913 |
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Side 18
... mixture is on fire when blown from the drill hole . Any gas or dust in the working place may be ignited by this burning mixture of coal dust and powder and an explosion result . Even when shale dust is in the mine air and is scattered ...
... mixture is on fire when blown from the drill hole . Any gas or dust in the working place may be ignited by this burning mixture of coal dust and powder and an explosion result . Even when shale dust is in the mine air and is scattered ...
Side 8
... mixture of coal dust and air explodes . COAL DUST IN EXPLOSIONS . The fact that dry pure dust from bituminous coal , lignite , or as- phalt explodes when ignited in the air has been proved beyond doubt by the tests at Pittsburgh ...
... mixture of coal dust and air explodes . COAL DUST IN EXPLOSIONS . The fact that dry pure dust from bituminous coal , lignite , or as- phalt explodes when ignited in the air has been proved beyond doubt by the tests at Pittsburgh ...
Side 9
United States. Bureau of Mines. a mixture of air and 5.5 to 11 per cent of methane , explodes with great violence when ignited . But although a fire - damp explosion may be violent , it is local because the explosive mixture seldom if ...
United States. Bureau of Mines. a mixture of air and 5.5 to 11 per cent of methane , explodes with great violence when ignited . But although a fire - damp explosion may be violent , it is local because the explosive mixture seldom if ...
Side 10
... mixture , the more difficult it is to set fire to the coal dust ; and when the mixture contains more unburnable dust than coal dust , there seems to be little or no danger of the coal dust spreading an explosion . But the unburnable ...
... mixture , the more difficult it is to set fire to the coal dust ; and when the mixture contains more unburnable dust than coal dust , there seems to be little or no danger of the coal dust spreading an explosion . But the unburnable ...
Side 3
... mixture of gas and air , the gas within the lamp flamed and ignited the gas outside the lamp . The second disaster was caused by a safety lamp that had not been properly assembled . In assembling this lamp the pull bar that works the ...
... mixture of gas and air , the gas within the lamp flamed and ignited the gas outside the lamp . The second disaster was caused by a safety lamp that had not been properly assembled . In assembling this lamp the pull bar that works the ...
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Vanlige uttrykk og setninger
accidents acetylene afterdamp amount analysis aspirator bulb atmosphere bandage battery black damp blasting blood bottle brattice BULLETIN Bureau of Mines burette burning canaries carbide carbide lamp carbon dioxide carbon monoxide carbon monoxide detector cars cartridge cause cent CIRCULAR Clarence Hall coal dust coal mines color combustion concentrations cubic dangerous detecting determination detonator device drill hole dynamite electric equipment explosive mixture falls feet figs FIGURE filament fire fire damp first-aid flame safety lamp fuse G. S. Rice gases gauze glass H. H. Clark heat hoolamite hydrogen sulphide ignited inches indicator light meter methane detector method miners minutes operations oxygen breathing apparatus percent percentage permissible explosives pipette poisoning powder precautions present pressure procedure props removed rescue station rheostat roof rubber sample container seal shot firer solution stopcock sulphur dioxide TECHNICAL PAPER temperature timber tion tube underground usually valve vapor ventilation volume wire
Populære avsnitt
Side 8 - Resuscitation, composed of authorized representatives of The American Medical Association, The National Electric Light Association and The American Institute of Electrical Engineers.
Side 21 - It is about 4£ inches long and is lined with mucous membrane, which is continuous with that of the nose and mouth.
Side 23 - The patient must be watched, and, if natural breathing stops, artificial respiration should be resumed at once. 11. In carrying out resuscitation, it may be necessary to change the operator. This change must be made without losing the rhythm of respiration. By this procedure, no confusion results at the time of change of operator, and a regular rhythm is kept up.
Side 23 - Not infrequently the patient, after a temporary recovery of respiration, stops breathing again. The patient must be watched, and, if natural breathing stops, artificial respiration should be resumed at once.
Side 21 - Mining and treatment of feldspar and kaolin in the southern Appalachian region, by AS Watts. 1913. 170 pp., 16 pis., 12 figs. BULLETIN 56.
Side 62 - When the methane content of air in face operations exceeds 1 percent at any point not less than 12 inches from the roof, face, or rib, as determined by a permissible methane detector, a permissible flame safety lamp, or chemical analysis, this condition shall be corrected by improving the ventilation promptly.
Side 21 - BULLETIN 17. A primer on explosives for coal miners, by CE Munroe and Clarence Hall. 61 pp., 10 pis., 12 figs. Reprint of United States Geological Survey Bulletin 423. BULLETIN 20. The explosibility of coal dust, by GS Rice, with chapters by JCW Frazier, Axel Larsen, Frank Haas, and Carl Scholz.
Side 9 - ... 6. Continue artificial respiration without interruption until natural breathing is restored, if necessary, four hours or longer, or until a physician declares the patient is dead. 7. As soon as this artificial respiration has been started and while it is being continued, an assistant should loosen any tight clothing about the patient's neck, chest or waist.
Side 14 - BULLETIN 15. Investigations of explosives used in coal mines, by Clarence Hall, WO Snelling, and SP Howell, with a chapter on the natural gas used at Pittsburgh, by GA Burrell, and an introduction by CE Munroe.
Side 60 - BULLETIN 44. First national mine-safety demonstration, Pittsburgh, Pa., October 30 and 31, 1911, by HM Wilson and AH Fay; with a chapter on the explosion at the experimental mine, by GS Rice.