Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 127
te coincide with those.in the lower,so that each puff corresponds to a single vibration. 412. Weights are placed upon the bellows to increasethe pressure and rate of revolution until the sound givenby the Syren corresponds to the sound whose vibrationsare to be determined. It is then allowed to… … Fig. 143. the pressure as great as is desired. 414. The Timing Fork, or Diapason, Fig.144, is a convenient-instrument for determiningvibrations. It is simply a fork of steel, oftenattached to a sounding-box to strengthen thesound. It is set to vibrating by drawing aviolin bow across one prong, or…
Physics
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