Tyndall, John, 1820-1893 · New York : Appleton · leaf 383
d of both flows forth in unison. When abit of wax is attached to one of the forks, powerful beatsare heard. Removing the wax, the unison is restored.When one of these unisonant forks is placed in the flameof a spirit-lamp its elasticity is changed, and it produceslong loud beats with its unwarmed… … a jar by a vertical diaphragm, and bringing one of the 1 In bis admirable experiments on tuning, Scheibler found in the beats etest of differences of temperature of exceeding delicacy. RESULTANT TONES. 375 forks over one of its halves, and the other fork overthe other; the two semi-cylinders of air…
Sound
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