ASTON, FRANCIS WILLIAM ), British scien tist, was born at Harborne, Birmingham, Sept. r 1877, and edu cated at Malvern College and the universities of Birmingham and Cambridge. He was elected to a fellowship at Trinity College, Cambridge, and was made assistant lecturer in physics at Bir mingham University in 1909. In 192o he received the Mackenzie Davidson Medal of the Röntgen Society, and in 1922 the Hughes Medal of the Royal Society. He received the Nobel Prize for chemistry in 1922 for his work in connection with isotopes and also the John Scott Medal, Philadelphia, and the Paterno Medal, Rome, both in 1923. He has written Isotopes (1922) and numer ous papers in scientific periodicals on electric discharge in gases, mass-spectra, isotopes, etc.