Colour-blindness and colour-perception
A 1909 London scientific treatise by Frederick William Edridge-Green on colour-blindness and colour perception, held by the University of Leeds Library and written for physiologists, oculists and students of vision. Its pictures are plain line diagrams of response curves across the spectrum, a numbered chart of spectral sensitivity types, and two hand-coloured snail illustrations, offering a designer clear examples of how colour graduates from warm reds and oranges to cool blues.
