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To mark his retirement in 1966 from the Professorship of Psychiatry at the University of London, and the directorship of the Institute of Psychiatry, the Maudsley Hospital, Professor Lewis's students edited and prepared an edition of his collected papers, in two volumes. Originally published in 1967 this volume reports the outcome of research in a variety of fields. Of the numerous clinical investigations, those into depressive states are dealt with most fully. Social studies, which had been the main concern of the Medical Research Council Unit of which Professor Lewis was for seventeen years Honorary Director, deals with themes of unemployment, environmental adjustment, and ecology. Today it can be read and enjoyed in its historical context.

In volume 16 of The Conversation Series , Hans Ulrich Obrist presents an in-depth exchange with the venerable German-born artist and activist Gustav Metzger, which illuminates the artist's fascinating life and 60-year career. In 1959, Metzger penned a manifesto of Auto-destructive art, which states in part, "Auto-destructive paintings, sculptures and constructions have a lifetime varying from a few moments to 20 years. When the disintegrative process is complete, the work is to be removed from the site and scrapped." In this volume, Metzger talks to Obrist about his past and present association with Auto-destructive art, how he has come to fuse his art practice with his political commitment to human rights and ecology, how he escaped the Holocaust at the age of 13 and the many projects he has yet to realize.

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