1681 __ Brass wheels
‣ Comment : The production of a musical sound by taps is usually effected by causing the teeth of a rotating wheel to strike in quick succession against a card. On July 27th, 1681, Mr. Robert Hooke showed an experiment making musical and other sounds by the help of the teeth of brass wheels, which teeth were made of equal bigness for musical sounds but of unequal for vocal." (In "Birch's History of the Royal Society, » page 96, published in the year 1757). (Professor Tyndall.) — « He (Dr. Hooke) showed a way of making musical and other sounds by the striking of the teeth of several brass wheels, proportionally cut as to their numbers, and turned very fast round, in which it was observable that the equal proportionate strokes of the teeth made musical notes, but the unequal strokes of the teeth more resembled the sound of the voice in speaking. ». (Richard Waller 1705)
‣ Source : Tyndall, John (1867). “On Sound — A course of eight lectures delivered at the Royal Institution of Great Britain”, London : Longmans, Green and Co, p. 50.
‣ Urls : http://history.sandiego.edu/GEN/recording/ar312.html (last visited )
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