"An elliptical bell, like [the one shown below from the Union College collection], emitting a very strident note, is a most convenient instrument for the production of [Lissajous] figures on membranes. Thus, a circular rubber membrane, which can be readily adjusted to various degrees of tension, is now tuned to the note given by the bell. On strewing the membrane with sand, and drawing the bow across the edge of the bell, a harsh, creaking sound is heard, which causes the sand immediately to arrange itself in the most complicated patterns." From J. A. Zahm, Sound and Music, second edition (McClurg, Chicago, 1900), pg 271.
This catalogue number 124 in Koenig's 1889 catalogue, and cost 12 francs.
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