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)
561. Figure 10.—Sound-w^aves caused by striking abell.—The vibrating bell causes the air to be thrown into waves of Fk;. 10. … condensation and rarefaction. The rarefactions are shown by thedarker portions of the figure, and the condensations by the lighter por-tions (567). o62. Figure 11.—The cause of vibrations in sonorousbodies illustrated by a bell.—Let the dotted circle represent ACOUSTICS. 309 the rim of a bell at…
Physics · Astronomy
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