Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 125
ch a silk string can be firmly attached tothe prong. From the fork the string passes round a dis-tant peg P, by turning which it may be stretched to anyrequired extent. When the bow is drawn across the fork,an irregular flutter of the string is the only result. Ontightening it, however, when at the… … sent moment is such that the string swings to and fro asa whole, its vibrations being executed in a vertical plane. Relaxing the string gradually, when the proper tensionhas been reached, it suddenly divides into two ventralsegments, separated from each other by a sharply-definedand apparently…
Sound
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