Color

(kull'-er). The differences in the appearance of a thing seen, other than those due to form and relief. The tint or hue of an object, dependent upon the number of vibrations of the ethereal stimulus. See Pigment . C. -blindne . See Blindne . C, Complementary, any color that added to another color, or to a mixture of colors, produces white. C. -contrast, any two colors that, when mixed, supplement the prevailing tone of the light. C.-cure, the supposed therapeutic effect of exposure to variously colored light. C. -hearing, the excitation of the visual center for color through the auditory nerve; the perception of sound photisms. See Photism . Cimage, an image of a highly colored object lighted with so wide an aperture that the refraction-images are drowned in the light. C. -sensation, depends on the number of vibrations of the ether, the same as the pitch of a note depends on the number of vibrations of the sounding body. Hering's Theory of C.-s predicates disa imilation and a imilation (decomposition and restitution) of the visual substance in vision white, red, and yellow representing the sensation of disa imilation, black, green, and blue that of restitution. The Yottng-Helmholtz Theory a umes three kinds of nerve-elements corresponding to the three primary colors. Stimulation of the first develops red, of the second, green, of the third, violet. See Photism . C. -sense, the faculty by which the various colors are distinguished. C.-top, a top containing on the sectors of its disc a number of colors to be " mixed" by rapid whirling. Colors, Mixed, those produced when the retina is excited by two or more simple colors. C, Saturated, those containing little or no white. C, Simple, those of the spectrum.