Miners' Circular, Utgaver 1-40U.S. Government Printing Office, 1913 |
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Side 7
... usually made of 73 parts of Chile saltpeter ( sodium nitrate ) , 16 parts of charcoal , and 11 parts of sulphur . Each of these substances is ground to a fine powder ; then they are mixed in the above proportion and again ground , being ...
... usually made of 73 parts of Chile saltpeter ( sodium nitrate ) , 16 parts of charcoal , and 11 parts of sulphur . Each of these substances is ground to a fine powder ; then they are mixed in the above proportion and again ground , being ...
Side 10
... Usually a stick of medium - strength dynamite was placed at the point of the hole , and the remainder of the hole was filled with black powder . The purpose was to have the dynamite " cut ahead " of the point of the drill hole into the ...
... Usually a stick of medium - strength dynamite was placed at the point of the hole , and the remainder of the hole was filled with black powder . The purpose was to have the dynamite " cut ahead " of the point of the drill hole into the ...
Side 12
... usually occupied by the tamped portion of the drill hole . The distance AF , figure 2 , is also often called the heel of the shot . Toe . The toe ( BCDE , fig . 2 ) is that part of the shot , or coal bed to be moved , that extends from ...
... usually occupied by the tamped portion of the drill hole . The distance AF , figure 2 , is also often called the heel of the shot . Toe . The toe ( BCDE , fig . 2 ) is that part of the shot , or coal bed to be moved , that extends from ...
Side 27
... usually desires to have the coal brought down without any extra pick work on his part , and he is not concerned so much with the quality of the coal produced as the shot firer is . Particularly is this true in those mines in which coal ...
... usually desires to have the coal brought down without any extra pick work on his part , and he is not concerned so much with the quality of the coal produced as the shot firer is . Particularly is this true in those mines in which coal ...
Side 13
... usually larger at the working faces ; and it is " at the face " that many explosions start . If methane comes from the floor or from the roof , it is likely to collect in the gob , or where there have been falls of roof , or in places ...
... usually larger at the working faces ; and it is " at the face " that many explosions start . If methane comes from the floor or from the roof , it is likely to collect in the gob , or where there have been falls of roof , or in places ...
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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.