Die Anthracenfarbstoffe
A German technical monograph on anthracene dyestuffs by Robert Gnehm, published by Friedrich Vieweg und Sohn in Braunschweig in 1897 for industrial and dye-works chemists. The plates are engraved plans, sections and elevations of factory apparatus — furnaces, autoclaves, retorts and brick settings — drawn in fine outline with dense diagonal and ruled hatching and letter keys, useful as flat diagrammatic pattern and machine-part silhouette.
