MAGAZINES: Moisture of, how absorbed, 89; powder stored in, 88; precautions to be observed when open, 89. MARKING: Cannon, 21-2; condemned shot and shell, 102; powder barrels, 88. MARCHES: Horse-artillery, field-artillery, cavalry, and infantry, 153. MATCH: Quick, 116; slow, 116. METALS for artillery, 9. MOMENTUM, 151. MORTAR WAGON, 145. MORTARS, 31 —Advantages of, 31 —Lengths and weights, 33 —Kinds, 11 —Beds, weights of, 33 —Platform, 121 —Form of chamber, 32 —Length of chamber and of bore, 33 —Kinds of projectiles used with, 34 —Rapidity of fire of siege mortars, 34 —Pointing, 56, 58; Greatest charges for, 62 —Angles of elevation for, 66-7 —Siege mortar beds, 130-1 —Coehorn mortar bed, 131 —Eprouvette bed, 131 —Sea-coast mortar bed, 132. MOUNTAIN artillery: Dimension and weights of, 29 —Composition of a battery, 42 —Ranges, 69. MULES: Strength of, 152. MUZZLE: Definition, 15 —Sight, 17. NATURAL ANGLE of sight, 12. NECK: Definition, 14. NOMENCLATURE of a piece, 13, 14, 15. NIGHT firing: With guns and howitzers, 55; with mortars, 59. OATS: Weight of, 154. PACK horses, 152. PENDULUM HAUSSE, 17. PENDULUMS: Length of, 158. PENETRATION of balls: In masonry, 150; in earth, 150. PERPENDICULAR, gunner’s, 18. PILING: Balls, 103 —Canisters, 104 —Loaded shells, 104 —Powder-barrels, 88 —Number of shot in a pile, 104-5. PLATFORMS, 118 —Siege, 119-20 —Mortar, 121 —Rail, 121 —Ricochet, 122. PLUMMET: For mortar service, 18, 58 —For regulating march of infantry, 161. POINT-BLANK RANGE, 63-4 —Causes which vary it, 64 —Effect on it of firing upwards under a large angle, 65. POINTING: Guns and howitzers, 51 —Mortars, 56 —Stakes, 57-8 —Wires, 56 —Cord, 57 —Board, 58. PORT FIRES, 114 —Composition for, 115. POINT of fall, 73-4. PRAIRIE CARRIAGE, 127-8. PREPONDERANCE: Definition, 19 —Why given, 19. PRIMERS: Friction, 115. PRIMING-TUBES, 115. PRESERVATION: Of cannon, 25 —Fixed ammunition, 103-4 —Balls, 102 —Grape and canister, 103 —Fire balls, 104. PROJECTILES: Solid shot, 90 —Shell, 90 —Spherical case, 90 —Canister, 91 —Grape, 91 —Grenades, 91 —Carcasses, 92 —Fire-balls, 92 —Light balls, 92 —Smoke balls, 93 —Hot shot, 97-8 —Forces acting on, when fired from a piece, 51 —Kind used with field pieces, and distance at which they should be employed, 46. QUADRANT, gunners: How used, 52-3. QUARTER-SIGHTS, 16. QUICK-MATCH, 116 —How set fire to, 117.