Psychological Studies: By Theodor Lipps. Second, Revised and Enlarged Edition. Translated by Herbert C. Sanborn. (Baillière, Tindall and Cox, London, 1926. Pp. 333. Price 27s.)

This book represents the second volume of the series of 'Psychology Classics' being edited by Professor Knight Dunlap, the first of which consisted of William James' and Carl Lange's famous contributions to the study of the emotions. The present work consists of three long essays devoted respectively to 'The Space of Visual Perception', 'The Nature of Musical Consonance and Dissonance', and 'The Law of Psychic Relativity and Weber's Law'. The publication of the original German edition, of the second German edition and of the present translation constitute three events which have been separated from each other by periods of roughly twenty years, and thus serve to remind us vividly of the advances made by psychological knowledge and the changes in the direction of psychological interest that have taken place in both of these intervals. Although the subjects here dealt with are no longer in the forefront of discussion, Lipps' thoughtful and ingenious treatment is far from having a merely historical interest and may be read with pleasure and advantage by all who have to deal, however remotely, with the themes in question.