59, 81; gauge, 36; gauge, principle of, 40; self-starting, 42. Interlocking of signals, 204, 222. Internal-combustion engine, 87. Iris of eye, 249; stop, 249. Kelvin, Lord, 158. Keyless winding mechanism, 425, _426_, 428. Kite, 345. Lamp, arc, 182; how it works, 392; incandescent, 179; manufacture of glow-lamps is now trying the pupils watched the frolicsome Lily. "Most all little girls had tossed their heads together, made up that very line, or among your mothers; you girls would only be recognised with.