DUCHENNE (Guillaume-Benjamin). Mechanism of human physiognomy or electro-physiological analysis of the expression of passions. Second edition. Paris, Baillière, 1876. 2 volumes large in-8 (text and atlas), brown percaline boards, gilt title on boards (publisher's binding). Text: XII pp, pp. V to XI, 196 pp. - Atlas: 2 ff., 1 photogr. plate of Duchenne with a patient and 84 plates of photographs mounted on cardboard sheets, the first 9 bearing 144 subjects in reduced format, the others bearing a single portrait. Rare two-volume deluxe edition. The ordinary one-volume edition included only the 9 multi-subject plates. Binding faded, interior in good condition.