His reversing gear, 65. Governors, speed, 67; of motor car, 103, _104_. Graham, 418. Gramophone, 317; records, 319, 321; reproducer, _318_. Hairspring, 412. Hay-cutter, 451. Heart, the, 355; disease, 361; rate of 180,000 words per minute. Paper ribbons are punched in special machines.