Chicago: The Crimson Press, 1934. Hardcover. Unpaginated preliminaries, 57p., fold-out frontispiece in colors, a few b&w charts in the text; hardcover first edition in cloth boards gilt. Somewhat edgeworn with minute fraying at corner-tips, spine titling faded to illegibility, foredge of the important frontis is creased. Find three neat but aggressive ownership legends; a good-only copy by the eminent theorist of hue, his sixth title.