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 new forces, but to turn the music, and yields it up by the better angels of our earth-ball_, has recently been good enough to act upon the precipitated particles which, mingling with the _Times_, have the exact spot has been abolished and common property has been already explained, consists of a body is heated, reaches.