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Scientific American, Vol. 52, No. 25 (June 1885) (1885)

leaf 4

An illustration from Scientific American, Vol. 52, No. 25 (June 1885), 1885, leaf 4
depth of tone as the gray produced by the two comple- drawn from such experiments is this: when the eye has pected; while with others, whose hue is of slight in- mentaries. We obtain this as follows: In a wooden seen a color, it is disposed to see the complementary tensity (ultramarine, for… … with the common complementary. Hg. 2.-DE LUYNES' CYLINDER APPARATUS. cumstances, the colors are invari- © 1885 SCIENTIFIC AMERICAN, INC

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