Color study : a manual for teachers and students (1895)
Cross, Anson K. (Anson Kent), 1862-1944 · Boston : Ginn & company · leaf 30
s act strongly upon the third setand cause the sensation of violet. Each set of nerve elements is acted upon powerfully by waves ofone length and to a slight extent by waves of other lengths, so thatthe waves which cause the sensation red produce at the same time aslight sensation of green and of… … The letters R, O, Y, etc., indicate the colors red, orange, yellow,etc., and the curved lines show the action of these colors upon thedifferent kinds of nerve elements. The diagram shows that thelongest waves (the red) act powerfully upon the first set of nerves,less powerfully upon the second, and…
Color
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