Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 73
pressed against the lead, the vibrations are rendered morerapid, and the taps link themselves together to a deepmusical tone. A second rocker, which oscillates morequickly than the last, produces music without any other Fig. 17. … pressure than that due to its own weight. Pressing it,however, with the file, the pitch rises, until a note ofsingular force and purity fills the room. Eelaxing the i-^ MUSICAL SOUNDS PEODUCED BY PUFFS. 53 pressure, the pitch instantly falls; resuming the pressure,it again rises; and thus by the…
Sound
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