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Scientific American, Vol. 100, No. 25 (June 1909) (1909)

leaf 15

An illustration from Scientific American, Vol. 100, No. 25 (June 1909), 1909, leaf 15
Scientific American 468 June 19, 1909. … ''Everything for the Experimenter" 1999 Ruby St. Rockford, ill. lower plane and about a foot above it, changing direction of the waves as pro- this seat and a foot rest being located jected. A simple example will illustrate We will ship you a 10 DAYS FREE TRIAL upon a pair of inclined braces…

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