This book, which has rapidly won a deserved popularity, is an attempt to present to the public the conclusions of recent trends in psychology, especially from the point of view of the practical bearings of them on life. The author, a distinguished biologist of Cambridge, pretends to no expert knowledge in psychology, but shows evidence of a keen interest and wide reading in the subject.

The new psychology referred to in the title means the work done of late years through the biological and clinical modes of approach. Its twin bases are, as is clearly seen by the author, the importance to