The outlines of physics: an elementary text-book . upon the periphery with the finger, and the plate then divides itself into an even number of vibrating segments, of which the usual number is four. When the plate is thusdivided into four parts, itutters its so-called funda-mental tones. When moresegments are produced,tones of higher pitch arethe result. 312. Vibration ofBells. — The case ofthe circular plate is ofinterest, because its mode of vibration is identical withthat of the bell. Bells, whether struck with the clap-per or set into vibration by means of the bow, vibratethus in segments
The outlines of physics: an elementary text-book . upon the periphery with the finger, and the plate then divides itself into an even number of vibrating segments, of which the usual number is four. When the plate is thusdivided into four parts, itutters its so-called funda-mental tones. When moresegments are produced,tones of higher pitch arethe result. 312. Vibration ofBells. — The case ofthe circular plate is ofinterest, because its mode of vibration is identical withthat of the bell. Bells, whether struck with the clap-per or set into vibration by means of the bow, vibratethus in segments separated from each other by nodal linesrunning from the apex to the lip of the bell. When thebell is in vibration the lip, which is circularin form when at rest, becomes distorted intothe form of an ellipse. (See Fig. 315.)This ellipse changes with each which was its major axis at one instantbecomes, an instant later, the minor oscillation takes place without anymovement at the nodal lines which pass through the point. Fig. 314.
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Keywords: ., bookcentury1800, bookdecade1890, bookpublishe, booksubjectphysics
