Merchant, F. W. (Francis Walter), 1855-1937, Chant, Clarence Augustus, 1865-1956 · Toronto : Copp Clark · leaf 105
upand down. Another interesting way to produce sound is by means of asquare or a circular brass plate. Clamp it at the centre andsprinkle sand lightly over it. Now draw a violin bow verticallyacross the edge of the plate. This makes the plate give outFig 119 ^ shrill note and the sand dances about… … the edge of the plate at one or at two places the plate gives out differentnotes and the sand takes updifferent figures (Fig. 120). There are many otherexperiments which mightbe performed and in everycase when we trace outthe source of the soundwe find that it arisesfrom a body in rapid vibration.…
Physics
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