Miners' Circular, Utgaver 30-42Bureau of Mines, 1928 |
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Side
... base in a mine ..... 11. Gas - mask crew advancing into bad air ......... . 22 222 23 24 25 14. Members of a gas - mask crew and oxygen - apparatus crew at an actual mine fire . 26 II USE OF A TYPE N , MINERS ' GAS MASK.
... base in a mine ..... 11. Gas - mask crew advancing into bad air ......... . 22 222 23 24 25 14. Members of a gas - mask crew and oxygen - apparatus crew at an actual mine fire . 26 II USE OF A TYPE N , MINERS ' GAS MASK.
Side 20
... base in the mine in Figure 10 , awaiting their turn to advance for exploration or work . When men and equipment are available and the work permits , two separate crews are usually alternated to keep them fresh and thus expedite the work ...
... base in the mine in Figure 10 , awaiting their turn to advance for exploration or work . When men and equipment are available and the work permits , two separate crews are usually alternated to keep them fresh and thus expedite the work ...
Side 22
FIGURE 10. - Crews with gas masks and oxygen apparatus at a fresh - air base in a mine Figure 11 shows the gas - mask crew advancing and. 22 USE OF A TYPE N , MINERS ' GAS MASK.
FIGURE 10. - Crews with gas masks and oxygen apparatus at a fresh - air base in a mine Figure 11 shows the gas - mask crew advancing and. 22 USE OF A TYPE N , MINERS ' GAS MASK.
Side 38
... base with the other , and shake the indicator up and down vigorously for 1 minute or about 100 times . Note carefully the position of the water level for any correction to be applied to the final reading . ( That is to say , if the ...
... base with the other , and shake the indicator up and down vigorously for 1 minute or about 100 times . Note carefully the position of the water level for any correction to be applied to the final reading . ( That is to say , if the ...
Side 44
... base rim 8 of insulating material , that is attached by screws to the flange base of the inner gauze . The cartridge base fits into a socket in an insu- lating block 9. Contact is made to the cartridge through flat spring 10 at the base ...
... base rim 8 of insulating material , that is attached by screws to the flange base of the inner gauze . The cartridge base fits into a socket in an insu- lating block 9. Contact is made to the cartridge through flat spring 10 at the base ...
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absorbed accidents acid afterdamp air lock amount analysis approved atmosphere barricade battery black damp bottle brattice bulb Bureau of Mines burette burning butt canister carbon dioxide carbon monoxide carbon monoxide detector cause cent coal mines combustion cuprous chloride dangerous detecting determined device electric cap lamps entries equipment erected explosive mixture extinguished face feet fire damp flame safety lamp fresh air fresh-air base gas masks gases glass hydrogen hydrogen sulphide inches indicator inhalation laboratory material metal mines methane detector method miners minutes necessary nitrogen opening oxygen breathing apparatus Penelec percent percentage pipette poisonous portable Orsat potassium hydroxide present pressure procedure props protection recovery operations removed rescue and recovery rescue station residue ribs rock roof rubber sample container sealed area self-contained oxygen breathing self-rescue respirator solution stopcock stoppings sulphur dioxide tests timber tion tube underground unsealing vacuum tubes valve vapors ventilation volume wearer
Populære avsnitt
Side 49 - The use of this mailing label to do so will be official business, and no postage stamps will be required UNITED STATES PENALTY FOR PRIVATE USE TO AVOID DEPARTMENT OF THE INTERIOR PAYMENT OF- POSTAGE, $300 BUREAU OF MINES OFFICIAL.
Side 41 - With arms held straight, swing forward slowly, so that the weight of your body is gradually brought to bear upon the patient. The shoulder should be directly over the heel of the hand at the end of the forward swing. Do not bend your elbows. This operation should take about two seconds.
Side 10 - ... may step into the street a sufficient distance to obtain a clear view, but not more than three paces; after the children have crossed, he returns to his station on the curb. Where the street is wide or the traffic heavy, there should be two patrol boys at the crossing. One operates as described in the preceding paragraph, on the side from which the children are coming. The other operates similarly on the opposite curb, giving attention to possible traffic approaching on that side and assisting...
Side 40 - Place the palms of the hands on the small of the back with fingers resting on the ribs, the little finger just touching the lowest rib, with the thumb and fingers in a natural position, and the tips of the fingers just out of sight.
Side 10 - Same as previous item with more possibility of collapse and syncope, increased respiration and pulse. 50-60 Syncope, increased respiration and pulse; coma with intermittent convulsions; Cheyne-Stokes
Side 36 - The closing valve of the highpressure gas container shall be provided with a device to prevent the wearer of the apparatus from screwing the stem entirely out of the valve. The closing valve shall also be provided with a device to enable the wearer to lock the valve stem open when the valve has been opened to the desired point. The valve-closing device shall be operable by hand without use of wrenches or external levers.
Side 9 - The function of the school safety patrol is to instruct, direct and control the members of the student body in crossing the streets at or near schools. Patrols should not be charged with the responsibility of directing vehicular traffic, nor be allowed to do so, other than signaling to a motorist who approaches the crossing after the student pedestrians have left the curb. • "Note: Patrols need not and should not, therefore, be recognized by city ordinance. They must not be termed 'police
Side 27 - Said commission shall, within ten days after their appointment, meet and organize by electing one of their number chairman and another secretary of said commission, who shall hold their respective offices for a period of one year from the date of their election and until their successors are elected and qualified. Members of the said commission...
Side 5 - One-half of 1 per cent of carbon dioxide in normal air causes a slight and unnoticeable increase in the ventilation of the lungs; that is, a man exposed to one-half of 1 per cent of carbon dioxide will breathe a little deeper and a little faster than when in pure air. If there is 2 per cent of carbon dioxide in the air, the lung ventilation will be increased about 50 per cent; if there is 3 per cent, the lung ventilation will be increased about 100 per cent; 5 per cent causes about 300 per cent increase...