[Footnote 3: I make no attempt here to give a systematic account of the general nature of the methods, discoveries and hypotheses of the psycho-analytic school, except in so far as they directly touch our present problem. Some at least of the general principles underlying the work of the school together with some of the results they have achieved are now becoming fairly well known. Those who would pursue the subject further may be referred to the following books: Brill, "Psychanalysis," 2nd. ed. 1914; Ernest Jones, "Papers on Psycho-Analysis," 2nd. ed. 1918; Pfister, "The Psychoanalytic Method," 1917; White, "Mechanisms of Character Formation," 1916; Barbara Low, "Psycho-Analysis," 1920. A more detailed study would include reference to Prof. Freud's own works, of which the principal are:--"Selected Papers on Hysteria," 1909; "Three Contributions to the Theory of Sex," 1910; "The Interpretation of Dreams," 1913; "The Psychopathology of Everyday Life," 1914; "Wit and its Relation to the Unconscious," 1916; "Totem and Taboo," 1918; "Vorlesungen zur Einführung in die Psychoanalyse," 1918; also four volumes of the "Sammlung kleiner Schriften zur Neurosenlehre," published at various times, and two volumes in the series entitled "Schriften zur angewandten Seelenkunde". For the meaning of the term Unconscious see Hart, "The Conception of the Subconscious," _Journal of Abnormal Psychology_, 1910, Vol. IV, 351. Hart's small book "The Psychology of Insanity," 1912, affords an excellent general introduction to abnormal psychology. (Here as elsewhere the titles and dates of English translations of foreign works are given, wherever such translations are available.)] [Footnote 4: The most important work dealing with this matter and with other questions of development generally is Freud's "Three Contributions to the Theory of Sex."] [Footnote 5: "The Interpretation of Dreams," 219.]