Handbuch der Phrenologie
Handbuch der Phrenologie is a German phrenology handbook by Gustav Struve, published in Leipzig by F.A. Brockhaus in 1845, drawing on the skull theories of Franz Joseph Gall. Its pictures are line engravings of human skulls seen in side and front views, with small crosses and zigzag sutures marked to show anatomical landmarks. A designer could draw on their precise hatching and cross-hatched shading to suggest scientific diagrams of bone structure.
