This volume of Recent Advances in Phyhemistry is the Proceedings of the 1979 Annual Meeting of the Phyhemical Society of North America held August 12-15 at Northern Illinois University, DeKalb. It contains a series of exciting chapters which start with the potential use of plant products as fuels and medicinals, their possible effects in carcinogenesis and use in steroidal hormone synthesis. The volume continues with a series of chapters which examine the importance of plant constituents in the breeding and selection of corn, cruciferous vegetables, soybeans and citrus fruits. All the contributions illustrate the wide importance of research which improves the health and the economic and social well being of mankind. The authors are to be congratulated on their lucid exposition of the progress of research in their subject area and for their patience while this book was being produced. The members of the Phyhemical Society of North America can feel proud of having another of their excellent symposia series in print. It is fitting, therefore, that this volume is dedicated to one of the founder members of the Society, Ted Geissman, who has inspired so many of us with his wisdom, teaching and wonderful support of all our endeavours. He was a giant among phyhemists and is sorely missed by all who knew him.