Books › The Violin: A concise exposition of the general principles of construction.., 1871 › scan 75
Scan 75
The Violin: A concise exposition of the general principles of construction.., 1871
12 lines. Read by computer on 28 September 2026. No printed page number was found. See the scan on archive.org.
1me that the points of the back and belly touched by the sound-post, are the points of least vibration. In the rendering of the vibrations of back and belly normal by the sound-post, we must clearly understand in what sense Savart uses the term normal, for Bishop, the translator of Otto's work, was evidently not aware of Savart's meaning.
3In his paper upon "The Vibrations of Solid Bodies considered in general," he defined the terms he should afterwards make use of in speaking of various modes of vibration. By normal he means vibrations executed perpendicularly to the surface of the vibrating body, or what in English acoustics is termed transverse vibrations; by tangential vibrations he means movements parallel to the surface. From the series of interesting experiments upon the sound-post, he deduces the following results:—
51st. That the deflections of the belly produce in the post a longitudinal movement, which, reacting upon the movements of the belly, determines therein a normal movement instead of an oblique one.
72nd. That the post holds the right foot of the bridge in a state of complete rigidity.
93rd. That the post communicates the vibration from belly to back.
11Now, as regards the first of these deductions, it is true that the general law ruling the communication of vibrations is, that all the vibrations of a vibrating system are executed in the same direction as the exciting cause. For example, suppose a b, in the accompanying Fig., to be a rod of wood, and c
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