Philo T. Farnsworth, inventor and pioneer of the electronic television, began college at BYU, and later returned to do fusion research, receiving an honorary degree from the university in 1967.[108] Alumnus Harvey Fletcher, inventor of stereophonic sound, went on to carry out the now famous oil-drop experiment with Robert Millikan, and was later Founding Dean of the BYU College of Engineering.[109] H. Tracy Hall, inventor of the man-made diamond, left General Electric in 1955 and became a full professor of chemistry and Director of Research at BYU.