Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 522
Ratio 1:2. Ratio 2; 3. by the apparatus, of which we produce three specimens ■(see cuts above, and page i66), are traced in a continuous ^stroke, commencing with the part of the greatest amplitude. By changing the relation and phases of the oscillations we obtain curves of infinitely varied aspect.…
Scientific recreations
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