Light and colour theories and their relation to light and colour standardization
A 1915 London and New York treatise by Joseph Williams Lovibond, written for scientists and colour specialists, setting out theories of light and colour alongside methods for standardizing colour measurement. The pictures are plain hand-drawn charts of colour units plotted against solution strength, dye percentage, and tube thickness, with labelled axes and curves. A designer might take from them the clean, schematic look of early scientific graphs, with bold red, yellow and blue lines on white.
