Essays on the anatomy and philosophy of expression
Sir Charles Bell's 1893 London edition of his essays on facial expression, drawn from the Getty Research Institute, offers anatomical studies of the human face in profile and three-quarter view. The pictures show a bald man looking upward, a man with an open mouth in strong emotion, an aged profile with deep wrinkles, and a dotted-line proportion diagram, giving designers a clear reference for how muscles and angles alter a face's mood.
