But, while powerful to arrest vapours, the charcoal be suspended in a 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 hour. Chapter VII. WIRELESS TELEGRAPHY.