This book can at best serve as an introduction to what is now a fairly extensive body of writings. Books on the subject are of very unequal merit, some being utterly uncritical, suggesting to the mind of the reader that the unconscious is everything and that conscious purpose and control are of no significance in mental life. Below I give for the English reader a short list of the most useful works on various aspects of the subject:

Bernard Hart: The Psychology of Insanity. (Cambridge University Press.) An excellent introduction to the study of the border line between normal and abnormal psychology.

Crichton Miller: Functional Nerve Disease. (Henry Frowde.) A collection of essays by distinguished medical men dealing with many aspects of psychotherapy.

William Brown. Psychology and Psychotherapy. (Arnold.) Written especially from the medical point of view, Ernest Jones: Papers on Psycho-Analysis. (Balliere & Tyndal.) A most comprehensive exposition of the extreme Freudian standpoint, clearer than much of the work of Freud himself, and showing, as it seems to me, a wider grasp of general psychological principles. The book deals mainly with medical aspects of the subject, but has sections dealing with general psychological aspects, with dreams, and with education and child study.

W. H. R. Rivers: Instinct and the Unconscious. (Cambridge University Press.) A penetrating study of the unconscious from the biological point of view.

Sigmund Freud: The Interpretation of Dreams, translated by A. Brill. (Allen & Unwin.) The most important of Freud's works. Later developments of his theories are given in Introductory Lectures on Psycho-Analysis, translated by J. C. Flugel (Allen & Unwin), which will bo published, I understand, this autumn (1921).

------ The Psycho-Pathology of Everyday Life.

Translated by A. Brill. (Fisher Unwin.)

Deals with forgetting, mistakes in speech and writing, unintentional errors in action, etc.

------On Dreams. Translated by M. D. Elder.

(Heine man.) A popular introduction to the subject.

C. G. Jung: Analytical Psychology. Translated by

Constanee Long. (Balliere, Tyndal & Cox.)

A collection of papers on varying topics, some of which require for proper comprehension a previous general knowledge of the subject.

O. Pfister: The Psycho-Analytic Method. Translated by C. R. Payne. (Kegan, Paul, Trench, Trubner & Co.)

Dr. Pfister is a pastor and seminary teacher in Zurich and writes largely for the teacher. He gives a large number of cases of his own investigation, but the book is diffuse and cumbersome.

Maurice Nicoll: Dream Psychology. (Oxford Medical Publications.)

A suggestive treatment from the point of view of Jung's psychology of dreams.

C. W. Kimmins: Children's Dreams. (Longmans.)

Gives an account of an investigation as to the dreams of children of various ages and in different types of schools.

E. B. Holt: The Freudian Wish. (Fisher Unwin.)

Deals chiefly with ethical aspects of the subject.

W. Healy: Mental Conflicts and Misconduct. (Kegan, Paul, Trench, Trubner & Co.)

A work full of interest for educationists and workers among juvenile delinquents, by the Director of the Psychopathic Institute, Juvenile Court, Chicago. The work is not written from a Freudian point of view, but bears a close relationship to some problems we have discussed.

At my request Mr. J. C. Flugel gives me the title of a book of his which is to be published this autumn (1921), viz. The Psycho-Analytic Study of the Family. (International Psycho-Analytic Press.)

Valuable papers on various aspects of our subject will be found in recent numbers of the British Journal of Psychology, both in the general section and in the special medical section.