Sound / by John Tyndall.

  • Tyndall, John, 1820-1893.
Date:
1875
Catalogue details

Licence: Public Domain Mark

Credit: Sound / by John Tyndall. Source: Wellcome Collection.

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    HAR Harmony—continued. — influence of overtones on har- mony, 373 — graphic representations of con- sonance and dissonance, 375 Harmonica, the glass, 136 Hawksbee, his experiment on sound- ing bodies placed in vacuo, 6 Hearing, mechanism of, 368 Heat, thermal changes in the air produced by the sonorous wave, 27. — ratio of specific heats at constant pressure and at constant volume deduced from velocities of sound, 29 — mechanical equivalent of heat deduced from this ratio, 31 — inference that atmospheric air possesses no sensible power to radiate heat, 33 — musical sounds produced by heated bars, 51 Helmholtz, his theory of resultant tones, 350, 352 consonance, 359, 363 Herschel, Sir John, his article on ‘ Sound,’ quoted 18 — his account of Arago’s observa- tion on velocity of sound, 278 Hooke, Dr. Robert, his anticipation of the stethoscope, 41 — his production of musical sounds by the teeth of a rotating wheel, 50 Horn, as an instrument for fog-sig- nalling, 263 Hydrogen, action of,upon the voice, 9 — deadening of sound by, 8 — velocity of sound in, 23, 36 TNFLECTION of sound, 21 JL — case of the Erith explosion, 21 Interference of sonorous waves, 328, 353 — extinction of sound bv sound, 330, 353 — theory of beats, 332, 353 Intervals, optical illustration of, 383 JOULE’S equivalent, 34 Jungfrau, echoes of the, 17 MUS ALEIDOPHONE, Wheatstone's, formation of, 130, 155, 156 Kundt, M., his experiments, 199 LAPLACE, his correction of New- ton’s formula for the velocity of sound, 26 Leconte, Professor, his observation upon sensitive naked flames, 228 — on the influence of musical sounds on the flame of a jet of coal-gas, 397, 402 Lenses, refraction of sound by, 19 Light, analogy between sound and, 13, 19 — analogy of, 270 Liquids, velocity of sound in, 36 — transmission of musical sounds through, 76 — constitution of liquid veins, 243 — action of sound on liquid veins, 246 — Plateau’s theory of the resolution of a liquid vein into drops, 247, 256 —- delicacy of liquid veins, 252 Lissajous, M., his method of giving optical expression to the vibra- tions of a tuning-fork, 58 AYER, his formula of the equivalent of heat, 33 Melde, M., his experiments with vibrating strings, 103, 370 -— — and with sonorous ripples, 153 Metals, velocity of sound trans- mitted through, 38 — determination of velocity in, 169 Molecular structure, influence of, on the velocity of sound, 39 Monochord or sonomoter, the, 83 Motion, conveyed to the brain by the nerves, 1 — sonorous motion. See Sound. Mouth, resonance of the, 196 Music, physical difference between noise and, 47, *80 a musical tone produced by pe- riodic, noise by unperiodic, im- pulses, 48, 80 — production of musical sounds by taps, 50, 80