Tyndall, John, 1820-1893 · New York : Appleton · leaf 186
a star. Wehave here six vibrating segments, separated from eachother by their appropriate nodal lines, Fig. 72, b. AgainI damp a point, and agitate another nearer to the damped VIBRATIONS OF CIRCULAR PLATES. 177 ono than in the last instance; the disk divides itself intoeiorht vibrating segments… … minute the vibrations become more rapid, and the pitchconsequently more high. The note emitted by the sixteensegments into which the disk is now divided is so acute asto be almost painful to the ear. Here you have Chladnisfirst discovery. You can understand his emotion on wit-nessing this wonderful…
Sound
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