Emeritus Professor of Physics and Richard Koret Professor in the History of Ideas, Brandeis University Dr. Schweber is involved in research in the history of science. His interests include the history of quantum field theory since World War II, the visualization of elementary processes (Feynman diagrams), and the impact of these methods on the conceptualization of physics; post-World War II science; science at the end of the century; and a biography of Hans A. Bethe. He helped establish the Dibner Institute for the History of Science and Technology at MIT and was its first director. Since 1981 he has been a faculty associate in the Department of the History of Science at Harvard University. He is a fellow of AAAS, the American Physical Society, and the American Academy of Arts and Sciences.