Galleries, listening, 170 Galleries of departure, 150 Galleries, partly lined, 148 Galleries, rate of advance of, 157 Galleries, transverse, 170 Gallery linings, 139-41 Gallery with frames and sheeting, 145-51 Gallery with cases, 153-6 Garrison of place, 99 Gases generated in mines, 133, 158 General requirements of siege batteries, 42 Globe of compression defined, 120 Governor of the place, 98 Guns, field, batteries for, 43 Guns and howitzers, batteries for, 44 Guns, ammunition required, 44-57 Guns for armament, 100 Guns of first artillery position, 76 Guns, positions of, to be changed, 106 Gunpowder, amount per cubic yard, 123, 124, 178 H Hasty demolitions, 181 High explosives compared with gunpowder, 131-5 High explosives, freezing of, 165 High explosives, use in blasting, 179-80 Houses and magazines, demolition of, 181 Howitzer batteries, 44 Howitzers for vertical fire, 83 Huts and shelters, 113 I Inclined galleries, 47 Infantry trenches, 104 Intrenched camp, attack upon, 91 Investment, 9, 65 Investment, distance of line of, 70-72 J Journal of the attack, 97 Journal of the defence, 110 Jumper, 178 K Kitchens and ovens, 114 L Landings, 150-1 Latrines, sinks, etc., 115 Line of investment, distance of, 70 Line of least resistance = L. L. R., 119