Page:Popular Science Monthly Volume 19.djvu/206

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THE POPULAR SCIENCE MONTHLY.

Fig. 4.

sults decidedly more favorable to the theory of Lord Rayleigh than to that of Mr. Preece:

1. A strip (A) similar to that used in Mr. Preece's experiment was attached firmly to the center of an iron diaphragm (B), as shown in Fig. 5, and was

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