Early interest in science; Brown University 1891-1896; Carl Barus; Universität Berlin 1897-1900, thesis work with Emil Warburg; American students in Germany; Wesleyan University 1902-1946. Early American Physical Society meetings, Arthur G. Webster. The piezo electric resonator and the frequency stabilizer, work on Rochelle salt crystals. Lawsuits regarding patent rights; independent inventors versus big corporations. Excerpts of family history, societies, list of outstanding students, list of patents; about Hans Jaffe, Frank Dietz, Frederick Slocum, the Langevin-Curie scandal. Avocations, old violins; disposition of his early apparatus, inventions, diaries; reasons for moving back to Rhode Island. Also prominently mentioned are: Clark, Albert Wallace Hull, Walter Kaufmann, Henry Parker Manning, Albert Abraham Michelson, A. M. Nicolson, Max Planck, Poulsen, Edward Bennett Rosa, Heinrich Rubens, Schwartz, George Wood Vinal; Scott Laboratory, and Western Electric Company.