Family life and early childhood environment; undergraduate studies at Case School for Applied Sciences, 1925-1929; M.S., 1933; influence of Dayton C. Miller; reanalysis of Miller's absolute motion experiments, meetings with Albert Einstein; National Bureau of Standards (NBS) work on ionosphere and standard frequency regulation, 1929-1930; contact with University of Chicago, 1930s and 1940s, thesis work on photon scattering under Arthur H. Compton, 1935; World War II sonar work in submarine warfare; architectural acoustics interests; tasks as Chairman of Physics Department at Case Western Reserve University, 1940-1958; consultant to Argonne National Laboratory, neutrino experiments, 1953-1969. Associations with D. C. Miller and A. H. Compton, their experimental style, personalities and influences on others; climate of opinion around relativity and quantum mechanics; the crucial Michelson-Morley experiments and others in relativity; comments on the resistance of the older generation of physicists; reaction to fission and the atomic bomb; problems of modern physics and comments on relation between pure and applied sciences, the existence of a scientific method, physics as related to other sciences, approaches to the history of science. Also prominently mentioned are: Samuel K. Allison, Luis Walter Alvarez, Samuel Austin, Raymond Thayer Birge, R. Blondlot, Niels Henrik David Bohr, C. P. Boner, Bragg, William Lawrence, Sir, Gregory Breit, Karl Taylor Compton, Walter Dale Compton, Karl Kelchner Darrow, R. L. Doan, Saul Dushman, Carl Henry Eckart, Thomas Alva Edison, Enrico Fermi, Armand Hippolyte Fizeau, Lester L. Foldy, Gustav Ludwig Hertz, Oliver Wendell Holmes, F. R. von Horn, J. W. Horton, William Vermillion Houston, Frank Clark Hoyt, Z. Jeffries, Edwin Crawford Kemble, G. Kuerti, Joseph Larmor, Ernest Orlando Lawrence, F. Leone, Hendrik Antoon Lorentz, W. H. Martin, Emanuel Maxwell, Sidney McCuskey, Albert Abraham Michelson, Dayton C. Miller, Robert Andrews Millikan, Jason John Nassau, J. Robert Oppenheimer, Henri Poincar,̌ Baron Rayleigh, John William Strutt, Owen Willans Richardson, Henry A. Rowland, Henry Norris Russell, Ernest Rutherford, Harlow Shapley, John Clarke Slater, G. Szell, John Torrence Tate, Geoffrey Ingram Taylor, Joseph John Thomson, Merle Antony Tuve, John Hasbrouck Van Vleck, M. Walsh, M. Walters, Robert Williams Wood; Bell Telephone Laboratories, Case School of Applied Science, George Washington University Law School, Mount Wilson Observatory, Phillips Petroleum Co., United States Navy New London Laboratory, and United States Office of Scientific Research and Development.