This volume has been created in honor of the seventieth birthday of Ted Harris, which was celebrated on January 11th, 1989. The papers rep resent the wide range of subfields of probability theory in which Ted has made profound and fundamental contributions. This breadth in Ted's research complicates the task of putting together in his honor a book with a unified theme. One common thread noted was the spatial, or geometric, aspect of the phenomena Ted investigated. This volume has been organized around that theme, with papers covering four major subject areas of Ted's research: branching processes, percola tion, interacting particle systems, and stochastic flows. These four topics do not* exhaust his research interests; his major work on Markov chains is commemorated in the standard technology "Harris chain" and "Harris recurrent" . The editors would like to take this opportunity to thank the speakers at the symposium and the contributors to this volume. Their enthusi astic support is a tribute to Ted Harris. We would like to express our appreciation to Annette Mosley for her efforts in typing the manuscripts and to Arthur Ogawa for typesetting the volume. Finally, we gratefully acknowledge the National Science Foundation and the University of South ern California for their financial support.

This volume has been created in honor of the seventieth birthday of Ted Harris, which was celebrated on January 11th, 1989. The papers rep resent the wide range of subfields of probability theory in which Ted has made profound and fundamental contributions. This breadth in Ted's research complicates the task of putting together in his honor a book with a unified theme. One common thread noted was the spatial, or geometric, aspect of the phenomena Ted investigated. This volume has been organized around that theme, with papers covering four major subject areas of Ted's research: branching processes, percola tion, interacting particle systems, and stochastic flows. These four topics do not* exhaust his research interests; his major work on Markov chains is commemorated in the standard technology "Harris chain" and "Harris recurrent" . The editors would like to take this opportunity to thank the speakers at the symposium and the contributors to this volume. Their enthusi astic support is a tribute to Ted Harris. We would like to express our appreciation to Annette Mosley for her efforts in typing the manuscripts and to Arthur Ogawa for typesetting the volume. Finally, we gratefully acknowledge the National Science Foundation and the University of South ern California for their financial support.

This book comprises an up-to-date and comprehensive coverage of the NMDA receptor. The NMDA receptor is an important protein in the brain which is involved in physiological processes such as synaptic transmission and synaptic plasticity which may underlie learning and memory. Pathological changes involving the NMDA receptors probably contribute to the development of epilepsy, acute neuronal damage such as that resulting from stroke and chronic neuropathologies such as Alzheimer's disease. There is considerable interest in the development of pharmacological agents active at NMDA receptors as new therapeutic agents.
Each chapter in this book has been prepared by a leading expert in the field and has been fully updated to cover recent developments in the molecular biology and the molecular pharmacology of the NMDA receptor. This is the only book of its kind in the world.

"I Dare Not Say consist of a lovingly spiritual admonishment that will evoke a spiritual awakening in every believer. The time for covering up the mandates of the Holy Bible rather than to implement them is over. Christians, this is the day of freeing oneself; the day of coming to grips with the fears of expressing one's innermost sentiments as the Word of God has given us permission to do so all the while making disciples for Jesus Christ. The time for the manifestation of God's power within the church as well as within us is now! Author J.C. Watkins in her book "I Dare Not Say" has stepped up to the challenge of calling the Church back to its intended purpose. This new book taps into the heart of Christian relationships, church member to church member; friend to friend and Pastor to congregation.