Massachusetts Institute of Technology, Cambridge, Massachusetts
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. Worked as x-ray technician during World War I; stationed in Russia for three years (Otto Blumenthal). On the rewriting of the dynamics theory and problems still to be solved.
Research in solid state physics from period of Sommerfeld's institutes; thesis, work in Frankfurt and Stuttgart; writing of Sommerfeld-Bethe Handbuch article. Also prominently metioned are: Patrick Maynard, Stuart Blackett, Felix Bloch, Clinton Joseph Davisson, Lester Halbert Germer, Werner Heisenberg, Irwin Madelung, Herman Francis mark, Sir Rudolf Ernst Peierls, Robert Wichard Pohl, Erwin Schrödinger, and Arnold Sommerfeld.