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APPARATUS TESTING TECHNIQUES AND SUBJECTS
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absolute brightness absolute limens adapted adjustment animal cage apparatus blue blue-green region brightness candle power cebus monkeys cent color blind color discrimination color sensation color theories color weakness complementary color mixtures complementary mixture criterion curves of graph data on color Edridge-Green evolutionary stages experimental cage Farbensinn food boxes genus gradually Guinea baboon human color vision human subjects illumination inches Ladd-Franklin theory lamp lemur Lichtsinn Macaca macaques maximum slit width McDougall mixtures of complementary monochromators negative color NEW-WORLD AND OLD-WORLD nocturnal animal obtained old-world monkeys optimal mixture Papio photopic vision Physiol positive color present primate Psychol red and green red and yellow red end red regions retina rhesus monkeys scotopic secondary cues sensitivity spectral colors spectrum spider monkey stage of color stimulation sub-primate mammals technique Trendelenberg and Schmidt Trichromatic vision visibility curves visual wave-length difference yellow and red yellow region Young-Helmholtz theory Zool Zsch