BALLS: Diameters and weights, 105-6; computation of weight and diameter, 95; piling, 103; number in a pile, 104-5; fire, 92; light, 92; smoke, 93; penetration, 149-50. BARBETTE CARRIAGE: Kinds, 132 —Parts composing, 133 —Description, 133-4. BARRELS: For gunpowder, marking, 88; piling, 88; transportation, 89. BATTERY: Definition of, 11 —Of field artillery, composition, 41; tactics, 44-5-6-7-8-9, 50 —Mountain Artillery, 42 —Ammunition for field battery, 41. BATTERY-WAGON, 143-4. BASE-RING: Definition, 13. BASE OF THE BREECH: Definition of, 13. BEDS, mortar: Weights, 33 —Trunnion-beds, 129 —Siege mortar, 130-1 —Coehorn, 131 —Eprouvette, 131 —Heavy sea-coast, 131-2. BOARD, Pointing, 58. BORE: Definition, 14; bottom of, 15. BORMANN FUZE, 112-13. BRASS CANNON: External injury, 23. BREADTH of a river ascertained, 157-8. BREACHING: Battery, best position for, 38; manner of, 38-9; time required, 39. BREECH: Definition, 13 —Sights, 16; how used, 53; construction, 17; pieces supplied with, 17. BRONZE: Objections to, for cannon, 10; why used for field pieces, 10; kinds of bronze pieces used, 11. BURNING gunpowder: Quickness of, 87. BURSTING OPEN gates, 158. BUSHING a piece, 20; metal used for, in bronze pieces, 20; object of, 20; all new artillery not bushed, 20.