Discusses his family background and education; World War I experiences; J. J. Thomson; return to Princeton as a graduate student in physics; research at Cambridge/Rutherford; Toronto, spectroscopy, and McClennan; collaboration with Russell; team of Russell, Turner, & Shenstone; laboratory astrophysics; spectra of highly ionized elements; publications; Charlotte Moore Sitterly; World War II years in Ottawa; Manhattan Project; radar research; Radiation Laboratory at MIT; retirement from Princeton; his debt to Russell.