Connection to terminal, machine, or battery not to be made until, 20, 21 Contact, fire on, when using circuit-closer, Pattern B, 24 ” spar leading-wires, Pattern B. (See Wires). ” torpedo. (See Torpedo). Continuity of wires, testing, 32, 38 Crutch, swivel, 8, 54 Cutting plyers, 52 Depth. (See Immersion). Detonator, 10, 41, 42, 53 ” blocks, 10, 53 ” bridge, resistance of, 11 ” care of, 41 ” charge, 11, 42 ” dummy, 12, 53 ” packing and stowage, 10, 42 ” splice-sample, 53 ” splicing on, 18 ” testing, manner of, 17 ” when tested, to be put in safe place, 17 Diaphragms, rubber, 56 Distance, proper, for contact torpedo before firing, 21 ” ” ” exercise ” ” ” 22 ” ” ” service ” ” ” 21 Drier, steam, 13, 46, 56 Dry primers. (See Primer). Drying apparatus, gun-cotton, 13, 47, 48, 49 ” gun-cotton, rules for, 45 Dummy detonators, 12, 53 ” gunpowder fuze, 53 Dynamo-electric machine, pattern A, 32, 52 ” ” ” ” C, 36, 53 Earth-plates, 52 Electric switches, 15, 56 ” ” and permanent wires, use of, 25 ” ” not issued with permanent firing apparatus, 15 ” ” ” to be used as firing keys, 26 Emery cloth, 52 Exercise torpedo. (See Torpedo). Fasteners, paper, 53 Fire at will, contact torpedoes, 24 ” on contact, contact torpedoes, 24 ” torpedoes using A machine and firing-key, 21 ” ” ” C ” , 21 ” ” ” battery and hand-firing key, 21 Firing-batteries, 27 ” ” boats, 28, 55 ” ” how to test condition of, 28, 30 ” ” management and care of, 29 ” ” no connection to be made with until, 20, 21 ” ” not to be used to test the circuit, 21 ” ” number furnished, 27 ” ” ships, 28, 55 Firing-key, D. E. machine, pattern A, 34, 52 ” ” ” ” ” ” to test, 36 Fittings, boats. (See Boat-fittings). ” bow, 8 ” heel, ship‘s torpedo spar, 16 ” ” ” ” ” substitute for, 16 ” ship‘s spar, 16, 56 Forward guy, ship‘s torpedo spar, how fitted, 16 Fuze bridges, spare, 55 ” gunpowder, dummy, 53 ” ” splicing on, 25 Fuzes, gunpowder, 12, 53 Fuzing torpedoes. (See Torpedo).