Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 451
riel;the illustrations here given will also allow of our verifyingthe truth of the statements. 94 OPTICAL ILLUSIONS. The first illustration consists of a series of concentriccircles of about the width of a millimetre, separated bywhite intervals of the same size. These dimensions arenot absolute ;… … Another figure of Mr. Thompsons. The different circles appear to turn roundif we give the design a rotating movement. movement of the wrist, the circle appears to turn roundits centre, and the rotation is in the same direction, andis equally swift; that is to say, the circle appears toaccomplish a…
Scientific recreations
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![An illustration from Telephones and telegraphs: 1902 : [and Municipal electric fire alarm and police patrol systems] (1906)](https://img.insideoutlibrary.com/img/200/ia-cu31924022817674-160-45.webp)
