This volume is based on presentations at an interdisciplinary conference on The Chemistry of Mood, Motivation and Memory which was held at the University of California, San Francisco in October, 1971. The conference was sponsored and supported by the Division of Continuing Education in Health Sciences. We thank Dr. Ruben Dixon and his staff for help in planning the conference and for attending to all of the organizational details. We particularly thank the participants for their contributions to the conference and for their cooperation in preparing the manu- scripts based on their conference...