births
October 23, 1873
William D. Coolidge, American physicist and engineer (died 1975)
William D. Coolidge
William David Coolidge was an American physicist and engineer, who made major contributions to X-ray machines. He was the director of the General Electric Research Laboratory and a vice-president of the corporation. He was also famous for the development of "ductile tungsten", which is important for the incandescent light bulb.