Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 153
. If you grasp the string with the nails and draw thehand back by jerks you will produce short sharp peals ofthunder, which can be changed into rolling peals at willby continuous rubbing. 136 MECHANICAL TOYS, ETC. THE MECHANICAL FLY. This fly, made of. polished metal some three inches,long, is… … Fig. 107.—The Mechanical Fly. the other end, by means of the cogged 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…
Scientific recreations
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