Johnson's natural philosophy and key to philosophical charts : illustrated with 500 cuts; being reduced photographic copies of all the diagrams contained in the author's philosophical series of indestructible school charts ; for the use of schools and families (1878)
ce. S60. Figure 9.—Vibrations of sonorous bodies illus-trated by the Jews-harp.—This little instrument, familiar to every one, affords a convenient illus-tration of the vibrations of sono-rous bodies. If its tongue be struckAvith the finger, its vibrations canbe distinctly seen. Tlie different… … 561. Figure 10.—Sound-w^aves caused by striking abell.—The vibrating bell causes the air to be thrown into waves of Fk;. 10.
Physics · Astronomy
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