The kaleidophone, intended to present visibly the movements of a sonorous body, consisted of a vibrating wire or rod carrying a silvered bead reflecting a point of light, the motions of which, by persistence of the successive images on the retina, were thus represented in curves of light.
The kaleidophone devised by Charles Wheatstone in 1827 gives these figures in a simple way.
Various modifications of the kaleidophone have been made (Rayleigh, Sound, § 38).
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