Text engl. - Andere Ausgabe: Dt. Ausgabe: „Der Ausdruck der Gemüthsbewegungen bei dem Menschen und den Thieren.“ Stuttgart 1874. - Enthält 7 Tafeln mit Heliotypien. S. VI: N. B. - Plates nos. 1 and 2 by Duchenne de Boulogne (1806-1875), no. 4 and 5 by an unknown photographer, nos. 6 and 7 by Oscar Gustav Rejlander (introduction, p. 23 down). - „Several of the figures in these seven Heliotype plates have been reproduced from photographs, instead of from the original negatives; and they are in consequence somewhat indistinct. Nevertheless they are faithful copies, and are much superior for my purpose to any drawing, however carefully executed.“