Includes bibliographical references.

Timaeus 68, by Plato.--On the soul II, 7, by Aristotle.--Sense and the sensible 2, 3, by Aristotle.--Meteorologica III, 2, 4, by Aristotle.--New theory about light and colors, by I. Newton.--Opticks, by I. Newton.--Theory of colors and vision, by G. Palmer.--Theory of light, by G. Palmer.--On the theory of light and colors, by T. Young.--Theory of compound colors, by H. G. Grassmann.--Theory of the perception of colors, by J. C. Maxwell.--The diagram of colors, by J. C. Maxwell.--Theory of compound colors, and the relations of the colors of the spectrum, by J. C. Maxwell.--On color vision, by J. C. Maxwell.--Physiological optics, by H. von Helmholtz.--Contribution to the physiology of visual sensations, by J. von Kries.--Chromatic adaptation, by J. von Kries.--Influence of adaptation on the effects produced by luminous stimuli, by J. von Kries.--The optics of trichromatic photography, by F. E. Ives.--Outline of a theory of color measurement for daylight vision, by E. Schrödinger.--Thresholds of color differences, by E. Schrödinger.--Some problems of visual perception, by J. Guild.--Interpretation of quantitative data in visual problems, by J. Guild.--Measurability of sensations of hue, brightness, or saturation, by L. F. Richardson.--Retinal structure and color vision, by S. Polyak.--Laminar pattern of the lateral geniculate nucleus considered in relation to color vision, by Sir W. E. Le Gros Clark.