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apply to quarries appoint approval average number bandage compresses belt shifters blasting powder boss or shot Bureau of Mines California shall apply cars change house chemical compound chief inspector Copy mailed crimpers dangerous deputy derricks detonator Director District of Columbia drill duty dynamite effective January electric employees Engineer equipped explosives and ingredients explosives or ingredients exposed to contact firing flanges floor openings floor or platform Flywheels forbidden gauze roller bandage gears Grinding Wheels guard rail held to mean hole imprisonment inches Industrial Accident Commission injury iodine ladder less license issued magazine mailed on application metal one-half 3i passageways primer pulley quarry foreman quarry operations quarry safety rules quarrymen Revolutions per minute ropes or chains Rules for Quarries rules shall mean Safety Orders issued Section set screw shafting shot firer sives stairway Steam Shovel stored superintendent surface speed thawed therein thereof toe-board vided Wire rope