Photography in colours
Photography in Colours is a 1916 London technical manual by George Lindsay Johnson, published by G. Routledge, written for photographers and students of colour photography. Its pictures are line diagrams and scientific plates: a spectrum band with Fraunhofer lines, a laboratory apparatus photographed sideways, a schematic floor plan with lettered points, and a cross-section of the eye with labelled parts. A designer could borrow the clean labelled diagram style, the spectrum colour bands, and the stark black-and-white technical plates.
