The place of this book in the medical curriculum is difficult to determine. It seems to cover the ground occupied by collegiate courses in psychology that are prerequisite to medicine according to the American plan. Thus it is far too elementary to serve a purpose in classes on psychiatry. Perhaps its greatest usefulness will lie in bringing down to date the physician of an earlier period who had no fundamental training in psychology. For him it will provide a brief statement concerning psychologic definitions, concepts, the physiology of the brain, current trends, the basis of sensations, and emotions.