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Professor at Universität Stuttgart, 1921-1937; visits the U.S. in 1936 (University of Michigan Summer School). Political climate in Germany and Ewald's dismissal from Stuttgart; works on foundations of crystal optics while living in mother's house. Leaves Germany on a research fellowship from University of Cambridge, 1937-1939; professorship at Belfast University, 1939-1949. Relationship with Hans Bethe; comments on his children. Discussion of Ewald's scientific contributions, in particular, the dynamics theory; comments on Max von Laue.
Born 1910 Rhode Island. Engineering interest at an early age; Massachusetts Institute of Technology undergraduate, aeronautical engineering; graduate studies in physics (John Slater, Philip Morse); assistant to Stark Draper, 1932-1934; fellowship at University of Cambridge (Professor Ralph H. Fowler); internal conversion of x-rays (with Geoffrey I. Taylor, 1934); MIT Ph.D. (P.
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.
Student work with Arnold Sommerfeld, Wolfgang Pauli, Werner Heisenberg; first paper with Heisenberg; paper on Hall Effect; history of early contributions to the electron theory of metals; extrapolation of second Hall paper by Leon Brillouin to three-dimensional case; errors in Pauli’s work on an-harmonic terms; Peter Debye’s error; paper on free electrons. History of and contributions to theory of semiconductors: Felix Bloch, Yakov Ilyich Frenkel, Ralph H. Fowler, Nevill Mott; Max Born on nonlinear electrodynamics; paper with Lev Landau on quantum electrodynamics; Walter Shockley.