This issue of the Journal is largely devoted to the above Congress. Most of the papers and contributions to the discussions, some of them in expanded versions, are presented. A few of the papers, however, have been or will be published elsewhere and a note indicating where readers can find these has been given where possible.

The papers are arranged according to the symposia which made up the Scientific Programme. Also included in this issue is the Bulletin of the International Psycho-Analytical Association which contains a report of the Business Proceedings.