Explosives. [Ch. 30. No. 4. shelves, and fittings in such building other than machinery shall be so constructed or so lined or covered as to prevent the exposure of any iron or steel and the detaching of any grit, iron, steel, or similar sub- stance in such manner as to come into contact with the gunpowder, and such interior benches, shelves, and fittings shall be kept free from grit and otherwise clean; (c) charcoal, whether ground or otherwise, and viled cotton, oil rags, and oiled waste, and any articles whatever liable to spontaneous ignition, shall not be taken into any such building , (@) no repairs shall be done to or in any part of such building except in accordance with the directions of the Governor ; (e) all tools and implements used in any repairs to or in any such building shall be made only of wood or copper or brass or some soft metal or material, or shall be covered with some safe and suitable material , (f) every person entering into any such building shall wear clothes without pockets, and shoes, if any, without any iron or steel therein, and no person shall introduce into any such building any lucifer matches or any artificial light (except luminous surfaces incapable of producing ignition) or any substance or article likely to cause explosion or fire, or any iron, stecl, or grit, (g) no person shall smoke in any part of a magazine except in such part, if any, as may be allowed by the Governor ; (2) any vehicle in which gunpowder is conveyed to or from any magazine shall be constructed without any exposed iron or steel in the interior thereof, and shall contain only the gunpowder, and shall be closed or otherwise properly covered over; and the gunpowder shall be so conveyed with all due diligence, and with such precautions and in such manner as will sufficiently guard against any accidental ignition; (t) no person under the age of sixtcen years shall be employed in or enter any building containing 191