Tissandier, Gaston, 1843-1899, Frith, Henry, 1840-, Harry Houdini Collection (Library of Congress) DLC · London, New York [etc.] Ward, Lock & Co · leaf 416
colours, and obtain the same resultantcolour from all the circles, when the proportion of theangles, occupied by each of the colours in the differentcircles is the same. If we paint on a disc a coloured star, which is detachedfrom a foundation of another colour, during the rapidrotation of the disc… … ROTATIVE DISCS. 59 are in accordance with, the theory of the mixture ofcolours. Rotative discs, which are so much used in experimentsin optical physiology, were employed for the first time byMiisschenbroeck ; the mostsimple is the top. M. Helm-holtz ordinarily uses a brassspinning-top, which the…
Scientific recreations
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