Die Gerb- und Farbstoff-Ertrarte
A German technical manual of 1887 by S. Mierzinski, published in Vienna by A. Hartleben, on extracting tanning and dye materials, written for tanners and dyers. Its pictures are line-drawn apparatus diagrams: a closed vessel with pipes, valves and gauges, a tall extraction tank with a pump and stacked cylindrical vats, and a brick-hatched foundation section, all labelled with letters and figure numbers. A designer could take the crisp schematic linework, the hatched brick texture and the labelled-plate layout.
