The H. L. Welsh Distinguished Lecturer Series Program for 2012
Prof. Harry Welsh's distinguished research activity in molecular spectroscopy at the University of Toronto spanned a period of forty years. He pioneered the study of collision-induced infrared absorption and of molecular complexes, and of the infrared and Raman spectra of liquid and solid hydrogen. During his years as chair in the 1960's, Prof. Welsh guided a period of rapid growth of the Department of Physics. The H.L. Welsh Lectures in Physics were begun in 1975 on the occasion of his 65th birthday and have become an annual event.