Colour-blindness and colour-perception
A scientific treatise on colour-blindness and colour perception, written by the ophthalmic researcher F. W. Edridge-Green and published in London in 1891 for a specialist and medical readership. Its pictures are plain line diagrams of spectrum curves with labelled colour points, alongside a small hand-coloured plate of grass tufts and a drawing of a stove, offering a designer clear schematic graphs and a minimal, tinted-diagram vocabulary.
