Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 71
mous ff^ori^rs, published in 1705, by Eichard Waller, Sec. E. S.:—, In July the same year he (Dr. Hooke) showed a way of making musical =and other sounds by the striking of the teeth of several brass wheels, pro- *portionally cut as to their numbers, and turned very fast round, in whichit was… … MUSICAL SOUXDS PKODUCED BY TAPS. 51 lowering of the pitch of the note. By checking the mo-tion still more, the pitch is lowered still further. We arehere made acquainted with the important fact that thapitch of a note depends upon the rapidity of its pulses.*At the end of the experiment you hear…
Sound
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