Few, especially in this country, realize that while Freudian themes have rarely found a place on the programs of the American Psychological Association, they have attracted great and growing attention and found frequent elaboration by students of literature, history, biography, sociology, morals and aesthetics, anthropology, education, and religion. They have given the world a new conception of both infancy and adolescence, and shed much new light upon characterology; given us a new and clearer view of sleep, dreams, reveries, and revealed hitherto unknown mental mechanisms common to normal and pathological states and processes, showing that the law of causation extends to the most incoherent acts and even verbigerations in insanity; gone far to clear up the terra incognita of hysteria; taught us to recognize morbid symptoms, often neurotic and psychotic in their germ; revealed the operations of the primitive mind so overlaid and repressed that we had almost lost sight of them; fashioned and used the key of symbolism to unlock many mysticisms of the past; and in addition to all this, affected thousands of cures, established a new prophylaxis, and suggested new tests for character, disposition, and ability, in all combining the practical and theoretic to a degree salutary as it is rare. These twenty-eight lectures to laymen are elementary and almost conversational. Freud sets forth with a frankness almost startling the difficulties and limitations of psychoanalysis, and also describes its main methods and results as only a master and originator of a new school of thought can do. These discourses are at the same time simple and almost confidential, and they trace and sum up the results of thirty years of devoted and painstaking research. While they are not at all controversial, we incidentally see in a clearer light the distinctions between the master and some of his distinguished pupils. A text like this is the most opportune and will naturally more or less supersede all other introductions to the general subject of psychoanalysis. It presents the author in a new light, as an effective and successful popularizer, and is certain to be welcomed not only by the large and growing number of students of psychoanalysis in this country but by the yet larger number of those who wish to begin its study here and elsewhere. The impartial student of Sigmund Freud need not agree with all his conclusions, and indeed, like the present writer, may be unable to make sex so all-dominating a factor in the psychic life of the past and present as Freud deems it to be, to recognize the fact that he is the most original and creative mind in psychology of our generation. Despite the frightful handicap of the odium sexicum, far more formidable today than the odium theologicum, involving as it has done for him lack of academic recognition and even more or less social ostracism, his views have attracted and inspired a brilliant group of minds not only in psychiatry but in many other fields, who have altogether given the world of culture more new and pregnant appercus than those which have come from any other source within the wide domain of humanism. A former student and disciple of Wundt, who recognizes to the full his inestimable services to our science, cannot avoid making certain comparisons. Wundt has had for decades the prestige of a most advantageous academic chair. He founded the first laboratory for experimental psychology, which attracted many of the most gifted and mature students from all lands. By his development of the doctrine of apperception he took psychology forever beyond the old associationism which had ceased to be fruitful. He also established the independence of psychology from physiology, and by his encyclopedic and always thronged lectures, to say nothing of his more or less esoteric seminary, he materially advanced every branch of mental science and extended its influence over the whole wide domain of folklore, mores, language, and primitive religion. His best texts will long constitute a thesaurus which every psychologist must know.