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... Xlll Acknowledgments I wish to acknowledge the cooperation and patience of the contributing authors, the assistance of my colleagues with the task of refereeing the chapter manuscripts, the forbearance and understanding of the book's publishers, and the contribution of Dr. Frederick S. Baker in soliciting chapters in the area of activated carbons. Finally, it is appropriate that I acknowledge my wife Lynne, whose support and encouragement were essential ingredients in the completion of this book. Timothy D. Burchell.