Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 126
nto three vibrating parts.Slackening it still more, it divides into four vibratingparts. And thus we might continue to subdivide thestring into ten, or even twenty ventral segments, sepa-rated from each other by the appropriate number ofnodes. When white silk strings vibrate thus, the nodes appear… … less luminous line on the surface of the aerial gauze.The four modes of vibration just illustrated are representedin fig. 46, 1, 2, 3, 4. The first experiment really made in the lecture was with a bar ofsteel 62 inches long, li inch wide, and half an inch thick, bent into the shapeof a tuning-fork,…
Sound
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