Tyndall, John, 1820-1893 · New York : Appleton · leaf 187
An effect of vibrating plates which long perplexedexperimenters is here to be noticed. When with the sandstrewed over a plate a little fine dust is mingled, say thefine seed of lycopodium, this light substance, instead ofcollecting along the nodal lines, forms little heaps at theplaces of most… … Fig. 75, and lodged between the nodal lines of the plate. VIBRATIONS OF BELLS. 179 Fig. 76. These three figures represent the three states ofvibration illustrated in Figs. 64, 65, and 66. The dustchooses in all cases the place of greatest agitation. Vari-ous explanations of this effect had been…
Sound
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