ROGER ADAMS was for a generation the leading organic chemist in the United States. In addition to publishing outstanding research in structural chemistry and stereochemistry and to training about 250 Ph.D.’s and postdoctorates at Illinois, he played a key role in the development of graduate education in science. His influence on the growth of industrial chemical research was great, both personally and through the students he trained. His services to the country in two world wars and to the scientific community brought him the role of scientific statesman on the world scene. He combined personal qualities of charm, strength, high intelligence, and extraordinary capacity for hard work.