Modern chromatics, with applications to art and industry
Ogden Rood's 1879 New York treatise on colour theory, published by D. Appleton and Company for painters and manufacturers, drew on physics of light and pigment. Its pictures are plain line diagrams: a colour circle with labelled sectors, a wedge of graded hatching showing spectral hues, a figure viewing blue and yellow squares through a card, and disk arrangements on dark grounds, useful to designers planning colour wheels and simultaneous contrast schemes.
