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accidents acetylene American Red Cross artificial respiration bandage blaster blasting caps blasting machine bleeding brakes buildings burns camp carbon tetrachloride carry cause CHAPTER Civilian Conservation Corps clean combustible company commander construction corps area cylinders danger deaths detonators driver dust electric Emergency Conservation engine enrollees equipment explosives extinguishers feet fire first-aid floor free-flowing bag powders garages gasoline gelatin goggles governor hand handle hazards highway hood inches injury inspection instructions lenses lifesaving limb load magazine material metal miles per hour National Safety Council nitroglycerin operator patient percent ammonia dynamite percent nitrostarch powder permitted persons poison poison ivy Poison sumac prevent project superintendent proper properly protection regulations removed revolutions per minute rope safe distance safety engineer scaffolds SECTION speed stick count stop storage stored stove sun tan swim technical agencies tion transporting tree trucks valve welding wheel wires wood wrenches