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Scientific American, Vol. 37, No. 24 (1877) (1877)
leaf 9
consisting of a Fic.10. Ors very fine sable hair pen- cil, projecting from the lower end of a glass tube of that body. The simplest and most direct method of re containing coloring mat- ATTEMPT cording vibratory movements is by Lissajou’s apparatus, by erial, the tube and pen- which the vibratory… … slightest pressure of the breath, and yet it must not méve so easily as to pass over the edge of the paper under the great- est pressure which the breath is capable of producing. By © 1877 SCIENTIFIC AMERICAN, INCInternet Archive · Public domain (published before 1931). Free to use for anything.
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