born Feb. 14, 1869, Glencorse, Midlothian, Scot.
died Nov. 15, 1959, Carlops, Peeblesshire
Scottish physicist.
His invention of the Wilson cloud chamber , a device that became widely used in the study of radioactivity, X rays, cosmic rays, and other particle phenomena, also led to the later development of the bubble chamber . He shared the 1927 Nobel Prize for Physics with Arthur Compton .