BOX 3. 1 1 Supply-box, containing:— 1 1 Monkey wrench. 3 3 Open-end wrenches.—One end fits the screw-cover of the torpedo-case; the other, the screw-bolts that secure the spindle. 1 1 Rectifier,—a wooden rod, marked in inches, for lining the blocks in the primer-case. 6 12 Pieces of emery cloth,—for brightening wires and removing rust. 1 2 Pairs of cutting plyers,—for general use in cutting and working wires. 1 2 Pieces of okonite tape,—for insulating naked wires when not exposed to water. 2 2 Earth-plates,—copper plates (coated with tin to prevent rust). 12 24 Pieces of rubber tubing,—for insulating splices. 1 1 Sample splice,—for instruction. 1 2 Spools of hemp twine,—for securing rubber tubing. 1 2 Knives,—for cleaning wires and for general use. 1 1 Screw-driver,—for general use. 6 12 Dummy detonators (painted white),—for instruction. 1 1 Sample detonator splice,—for instruction. 1 1 Dummy gunpowder fuze,—for instruction. 24 36 Spherical rubber packings. 36 36 Paper fasteners. 2 2 Safety-pins for circuit-closer (spare). 1 1 Spring for circuit-closer (spare). 1 1 ⅜ by 16 screw-tap,—to cut a thread for spar screws. 12 12 Screws for boat‘s steel spars,—to secure the two parts of a boat spar. 4 4 Reeving-lines,—for reeving leading-wires through the boat‘s spars. 2 2 Reeving-line weights,—to reeve the reeving-lines through the boat‘s spars. BOX 4. 1 Wire-box, ship‘s, containing:— 4 Spar leading-wires. 2 Machine connecting wires-(12 feet long, spare). BOX 5. 4 Spar-bands with key-ways. 4 ” (ordinary). 24 Wood screws. BOX 6. 4 8 Tin boxes, containing:— 4 8 Detonator-blocks. 32 64 Detonators. BOX 7. 32 32 Gunpowder igniters. 18 18 ” fuzes. BOX 8. 2 4 Glass jars with corks, containing:— 12 24 Blocks dry gun-cotton.