Tyndall, John, 1820-1893 · London : Longmans, Green · leaf 171
as the numbers 1, 2, 4. When they are sounded insuccession, the musical ears present can testify that theyreally stand to each other in the relation of a note, itsoctave, and its double octave. l2 148 LECTURE IV. § 10. Strehlke and Faraday^s Experhnents : deportmentof light powders. The actual… … scribe are very clearly drawn upon the plates. M. Strehlkehas sketched these appearances, and from him the patternsA, B, c, fig. 73, are borrowed. An effect of vibrating plates which long perplexedexperimenters is here to be noticed. When, with the sand Fig. 74. Mm ii V Fig. 75. \ •^^^sas^ / / / +…
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