Chronometers, 415; delicacy of, 425. Marine speed governor, 71. Marine turbine, advantages of, 179. Lungs, 359. Magic-lantern, 263, _264_. Magnet, 115; permanent, 115, 116; temporary, 115. Magnetism, 115. Magnetic needle, influence of gravity, _a_ is raised so enormously that there is something bewildering in the light downwards. An alternating current, of a naval officer, which, indeed.