Students' text-book of color, or, Modern chromatics : with applications to art and industry (1881)
Rood, Ogden N. (Ogden Nicholas), 1831-1902 · New York : D. Appleton · leaf 265
low ground, itis made to appear decidedly blue. So strong is the illusionthat, even after the causes which gave rise to it have disap-peared, it still persists, as can be shown by the followingexperiment of Helmholtz -• While the coloured shadows are 256 MODERN CHROMATICS. falling on the screen,… … Fig. 123.—Blue and Yellow Shadows viewed through a Tube. After the blue shadow has developed itself in full intensity,the tube is to be moved to the left, so that the blue shadowmay fill the whole field. The tube being held steadily inthe new position, the shadow will still continue to appearblue…
Color · Painting · Color in art
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