Harold E. Edgerton was born in Fremont, Nebraska. He received the Bachelor of Science degree from the University of Nebraska in 1925. After one year with the General Electric Company, he entered the Massachusetts Institute of Technology and has been there, first as student and then as teacher, ever since. He received the .S. degree in 1927 and the hP octor of Science degree in electrical engineering four years later. At that time he was beginning his life's work, prefecting the stroboscope, which has revolutionized ultra-high-speed motion and still photography. Dr. Edgerton organized and helped in the initial operation and management of Edgerton, Germeshausen, and Grier, Inc. (EG&G). He has pioneered the development of flash photography in the ocean depths. Out of this work has grown the sonic probe of the ocean bottom. He has become widely known as an underwater explorer. Above all, Dr. Edgerton is a master teacher who understands well the meaning of relevance and the sources of motivation in education. He is a prolific contributor to scientific journals and the holder of over forty patents. He has received honorary degrees of Doctor of Engineering from the University of Nebraska, and Doctor of Laws from the University of South Carolina. A recipient of numerous awards from the foremost engineering and photographic societies of the world, he is a member of the National Academy of Sciences and the National Academy of Engineering.