Foldout, De la loi du contraste simultané des couleurs (The principles of harmony and contrast of colors), Color chart, plates 6, 7, 8, 1839 ND1488 .C52 1839 Related Objects Book Illustration, De la loi du contraste simultané des couleurs (The principles of harmony and contrast of colors), Color chart, plate 38, 1889 Book Illustration, Colour Harmony and Contrast: For the Use of Art Students, Designers, and Decorators...; Modification of Tone and Hue of a Colour when placed on or near Different Colours, pl. 8, 1903