Listening galleries or listeners, 170-72 Loading and firing mines, 161 Location of batteries, 9, 75 Location of magazine, 58 Lodgement, 170 M Magazines, 57 Magazines, construction of, 60 Magazines, cover for, 58 Magazines, drainage of, 59 Magazines, elevated, 62 Magazines, execution of the work upon, 61 Magazines, location of, 58 Magazines, mined, 61 Magazines, precautions against dampness, 63 Maps, 151 Masks for batteries, etc., 45 Masks, air-tight, for exploring mines, 160 Maxims, Vauban’s, 94 Mine defined, 119 Mine-chamber, 160 Mine, common, 120-5 Mine, overcharged and undercharged, 120, 125, 131, 171-72 Mines of attack, 169, 171 Mines of defence, 171-2 Mines, organization of, 169 Mine tactics, 172-6 Mined magazine, 61 Mining, military, object of, 119 Miner, attaching a, 177 Miner’s bellows, 137 Miner’s candlestick, 137 Miner’s lamp, 137 Miner’s pick and shovel, 136 Miner’s rule, 122 Miner’s truck or car, 137 Mortar batteries, 55, 83 Mortars, siege, 57, 107 Musketry fire, 84 O Observatories, 54 Occupation of conquered place, 93 Opening fire, attack, 76