According to the testimony of a colleague who was an eyewitness of the developments at Burghölzli, it may be asserted that psychoanalysis awakened an interest there very early. Already in Jung’s work on occult phenomena, published in 1902, there was an allusion to dream interpretation. Ever since 1903 or 1904, according to my informer, psychoanalysis came into prominence. After the establishment of personal relations between Vienna and Zürich, a society was also founded in Burghölzli in 1907 which discussed the problems of psychoanalysis at regular meetings. In the bond that united the Vienna and Zürich schools, the Swiss were by no means the merely recipient part. They had themselves already performed respectable scientific work, the results of which were of much use to psychoanalysis. The association-experiment, started by the Wundt School, had been interpreted by them in the psychoanalytic sense and had proved itself of unexpected usefulness. Thus it had become possible to get rapid experimental confirmation of psychoanalytic facts, and to demonstrate experimentally to beginners certain relationships which the analyst could only have talked about otherwise. The first bridge leading from experimental psychology to psychoanalysis had thus been constructed. In psychoanalytic treatment, however, the association-experiment enables one to make only a preliminary, qualitative analysis of the case, it offers no essential contribution to the technique, and is really not indispensable in the work of analysis. Of more importance, however, was another discovery of the Zürich School, or rather, of its two leaders, Bleuler and Jung. The former pointed out that a great many purely psychiatric cases can be explained by the same psychoanalytic process as those used in dreams and in the neuroses (Freudsche Mechanismen). Jung employed with success the analytic method of interpretation in the strangest and most obscure phenomena of dementia præcox, the origin of which appeared quite clear when correlated with the life and interests of the patient. From that time on it became impossible for the psychiatrists to ignore psychoanalysis. Bleuler’s great work on Schizophrenie (1911), in which the psychoanalytic points of view are placed on an equal footing with the clinical-systematic ones, brought this success to completion.