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kaleidophone
Sign in to savethumb|Kaleidophone on display at Palais de la Découverte in Paris.The kaleidophone is a "philosophical toy" that produces moving optical figures.
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thumb|Kaleidophone on display at Palais de la Découverte in Paris.The kaleidophone is a "philosophical toy" that produces moving optical figures.
== History == The kaleidophone was invented by Charles Wheatstone, who published an account of the device in 1827.
Excerpted from Wikipedia’s “kaleidophone” article, available under the CC BY-SA 4.0 licence.