On colour-sight and colour-blindness in its relation to railway and sea signals : read before the Glasgow Philosophical Society, on March 5, 1879
A lecture on colour vision and colour-blindness, read to the Glasgow Philosophical Society in 1879 and published in London by J. & A. Churchill, written by the surgeon J. R. Wolfe for those concerned with railway and sea signalling. Its two pictures are diagrams: three stacked curves plotting sensitivity across the spectrum from red to violet, and a prism splitting light into labelled colour bands. A designer could draw on their clean, schematic line work and the way colour bands are laid out in order.
