On color induction with reference to color recognition
A 1916 psychology monograph by Mary Ruth Almack on color induction and color recognition, published in Lancaster, Pennsylvania, apparently aimed at researchers in color sense. The four charts plot percentage curves across wavelength or color-stimulus steps with dotted, dashed and solid lines, and a designer might borrow their clean, sparse line-graph style for data visualisation, with the stepped red-blue-yellow-green sequence chart suggesting a restrained categorical palette.
