International Annual Tables of Constants and Numerical Data. Vol. 11 (Years 1931–1934.) Part 1 (Sections 1–25). Pp. xvi+492+xv–xxv. (Paris: Hermann et Cie.; New York: McGraw-Hill Book Co., Inc., 1937.) These sections contain comprehensive numerical data on molecular spectra of diatomic and polyatomic molecules. Derived quantities such as electronic levels, vibration frequencies, anharmonic coefficients, moments of inertia, atomic distances, linkage force constants, and dissociation energies are systematically presented. The tables are valuable for physicists and chemists studying molecular structure, and their clear organization helps those unfamiliar with the literature. A bibliography and element-index of papers on atomic spectra from 1931–34 are also included. Peter Kürten: A Study in Sadism. By George Godwin. Pp. 60. (London: The Acorn Press, 1938.) 5s. net. This book describes one of history's most horrifying crime series. Peter Kürten, a sadist, terrorized Düsseldorf. He was convicted of nine murders. Medico-legal experts concluded he was not mentally ill and was legally responsible. Reading, Writing and Speech Problems in Children: A Presentation of Certain Types of Disorders in the Development of the Language Faculty. By Prof. Samuel Torrey Orton. (Thomas W. Salmon Memorial Lectures.) Pp. 215. (London: Chapman and Hall, Ltd., 1937.) 10s. 6d. net. This book presents the third of the Thomas W. Salmon Memorial Lectures. It discusses language disorders in children based on the author's clinical experience and pathological material. It shows that many children with speech defects benefit from therapeutic efforts. An Elementary Treatise on Statically Indeterminate Stresses. By Prof. J. I. Parcel and Prof. G. A. Maney. Second edition. Pp. xvi+432. (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1936.) 25s. net. This book discusses methods for solving indeterminate structures. The second edition includes the Cross method and adaptations of the slope deflection method. It is well-organized and suitable for students. Plato's Conception of Philosophy. By Dr. H. Gauss. Pp. xxii+272. (London: Macmillan and Co., Ltd., 1937.) 6s. net. The author views philosophy as a mode of life, not just results. The book focuses on Plato's views on epistemology, ethics, and life. It offers useful insights and challenges traditional interpretations. The Definition of Psychology:International Annual Tables of Constants and Numerical Data. Vol. 11 (Years 1931–1934.) Part 1 (Sections 1–25). Pp. xvi+492+xv–xxv. (Paris: Hermann et Cie.; New York: McGraw-Hill Book Co., Inc., 1937.) These sections contain comprehensive numerical data on molecular spectra of diatomic and polyatomic molecules. Derived quantities such as electronic levels, vibration frequencies, anharmonic coefficients, moments of inertia, atomic distances, linkage force constants, and dissociation energies are systematically presented. The tables are valuable for physicists and chemists studying molecular structure, and their clear organization helps those unfamiliar with the literature. A bibliography and element-index of papers on atomic spectra from 1931–34 are also included. Peter Kürten: A Study in Sadism. By George Godwin. Pp. 60. (London: The Acorn Press, 1938.) 5s. net. This book describes one of history's most horrifying crime series. Peter Kürten, a sadist, terrorized Düsseldorf. He was convicted of nine murders. Medico-legal experts concluded he was not mentally ill and was legally responsible. Reading, Writing and Speech Problems in Children: A Presentation of Certain Types of Disorders in the Development of the Language Faculty. By Prof. Samuel Torrey Orton. (Thomas W. Salmon Memorial Lectures.) Pp. 215. (London: Chapman and Hall, Ltd., 1937.) 10s. 6d. net. This book presents the third of the Thomas W. Salmon Memorial Lectures. It discusses language disorders in children based on the author's clinical experience and pathological material. It shows that many children with speech defects benefit from therapeutic efforts. An Elementary Treatise on Statically Indeterminate Stresses. By Prof. J. I. Parcel and Prof. G. A. Maney. Second edition. Pp. xvi+432. (New York: John Wiley and Sons, Inc.; London: Chapman and Hall, Ltd., 1936.) 25s. net. This book discusses methods for solving indeterminate structures. The second edition includes the Cross method and adaptations of the slope deflection method. It is well-organized and suitable for students. Plato's Conception of Philosophy. By Dr. H. Gauss. Pp. xxii+272. (London: Macmillan and Co., Ltd., 1937.) 6s. net. The author views philosophy as a mode of life, not just results. The book focuses on Plato's views on epistemology, ethics, and life. It offers useful insights and challenges traditional interpretations. The Definition of Psychology: