Phrenology, in connexion with the study of physiognomy / by G. Spurzheim.
A 1826 London treatise on phrenology and physiognomy by Johann Spurzheim, published by Treuttel, Würtz and Richter and held by Glasgow University Library. Its plates are paired engraved head portraits in profile and three-quarter views, each labelled Fig. 1 or Fig. 2, showing the faces of named individuals for comparing features. A designer could draw on their fine stipple-like shading, plain numbered captions, and the sober tonal contrast of pale heads on cream paper.
