Elementary natural philosophy : designed for high schools and academies (1881)
Griffin, La Roy F. (La Roy Freese), 1844-1916 · Philadelphia : Sower, Potts & Co. · leaf 114
pason, Fig. 132, illustrates the same point.It consists of a tuning fork, and a sound-ing box. When the fork is removed fromthe box, the sound is scarcely audible; butwhen attached to the box, and the openend turned towards the ear, the sound ismuch louder. The reason is that the col-Fig. 132. umn…
Physics
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