University of Michigan, 1935; work with George E. Uhlenbeck; history of "dislocations." Postdoc with Frederick Seitz at University of Pennsylvania, Westinghouse fellowship; Seitz becomes department head at Carnegie Institute of Technology during World War II. Work with Office of Scientific Research and Development on armor penetration, and in Manhattan Project on radiation damage and mechanical properties of uranium. Colleagues and history of research in solid state. Sabbatical at University of Cambridge. Also mentioned at length are: David Mathias Dennison, Sir Francis Nevill Mott, Heike Kamerlingh Onnes, Wolfgang Pauli, and John A. Wheeler.