third Areas of Application (Gas and Liquid Dynamics, Critical Phenomena, Biology). The seminars provided detailed presentations of applications to a number of specific problems. . Although the selection of topics was inevitably li mi ted, i t was the hope of the organizing committee that the lectures would provide a broad coverage appropriate for the needs of the interdisciplinary audience represented by the participants, and that this volume would serve for some years to come as a useful introduction for those entering the field. The members of the Organizing Committee were: E.R. Pike, RRE, Malvern U.K. } Co- directors H.Z. Cummins, New York University M. Bertolotti, Universita di Roma - LocalOrganizer J.M. Vaughan, RRE, Malvern, U.K. Secretary H. Swinney, New York University Treasurer P. Lallemand, Ecole Normale Superieure, Paris H. Haken, Universitat Stuttgart, Germany.