Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 154
wheel delineatedin the lower part of the illustration herewith (Fig. 107).A catch permits the release of the machinery at thedesired moment. The screw imparts a rapid movementto the fly, and makes it fly in a circle around the pointof suspension.v MECHANICAL TOYS, ETC. 137 THE DOUBLE MARBLE. Place… … Fig. 108.—The DdubleMarble. ball cannot be touched at the same time by the exteriorsof two fingers of the same hand. When we cross ourfingers, however, the normal conditions are changed, butthe instinctive interpretation remains the same, so muchsp that the frequent repetition of the experiment…
Scientific recreations
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