Les plantes tinctoriales et leurs principes colorants
A French dye-chemistry treatise on tinctorial plants and their colouring principles, written by Victor Thomas and published in Paris by Gauthier-Villars in 1901 for chemists and dyers. Its pictures are plain line diagrams of molecular structures, drawn in black on cream paper, with hexagon rings, bonds and formula labels; a designer could draw on their clean geometric rhythm for pattern or diagram-based graphics.
