Practical preventive medicine . sort should not be turned on, or machinery set inmotion, unless it is known that no one is in a position to beinjured. 12. Transportation Hazards.—Employees suffer from thesemore than passengers, while trespassers suffer the most. Acci- HAZARDS OF OCCUPATION 241 dents upon the railroad are mainly due to the following: Care-lessness,, lack of discipline, overwork, and the lack of safetydevices. Passengers mainly suffer from derailment and collis-ions while employees suffer from accidents arising in couplingand uncoupling cars, and by falling from cars or engines.
Practical preventive medicine . sort should not be turned on, or machinery set inmotion, unless it is known that no one is in a position to beinjured. 12. Transportation Hazards.—Employees suffer from thesemore than passengers, while trespassers suffer the most. Acci- HAZARDS OF OCCUPATION 241 dents upon the railroad are mainly due to the following: Care-lessness,, lack of discipline, overwork, and the lack of safetydevices. Passengers mainly suffer from derailment and collis-ions while employees suffer from accidents arising in couplingand uncoupling cars, and by falling from cars or engines. 13. Mining and quarrying have types of peculiar hazards suchas fall of roof and explosions. The former can largely be elimi-nated by proper timbering. Explosions are due to differentcauses. Float dust containing 10 per cent, or more of volatilematter is very explosive when brought in contact with a nakedflame. It should either be wet down or covered with stone damp (CH4 and O) explodes either from a naked flame or. Fig. ioi.—Rescuing fellow-workman. Miners equipped with breathing ap-paratus. (Bull. 4, U. S. Steel Corp.) a shot. Danger from CO in old workings can be readily de-tected by the use of canary birds (Fig. 102). Many explosionsof dust or fire damp are due to the flame produced by the so-called permissible explosive only shouldbe employed. These do not produce a big flame. Minersshould not tamp down charges of explosives with metal rods,due to the danger of premature explosions. Charges shouldbe fired from a central switch after all men are checked out fromthe mine. Fire danger can largely be eliminated by the use ofsafety lamps and the protection of the shaft (Fig. 101). Addi-tional dangers encountered are from collisions between carsand lack of clearance between the cars and the wall, and also ofelectrocution from low overhead trolley wires. 16 242 PRACTICAL PREVENTIVE MEDICINE 14. Air Pressure.—Increased air pressure is only en
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Keywords: ., bookcentury1900, bookdecade1920, booksubjectprevent, bookyear1920
