Abstract Wolfgang H. J. Yourgrau (1908-1979) served as Professor of History and Philosophy of Science at the University of Denver, Denver, Colorado. He was associated with the University from 1963-1978. He also served as Chair of the Philosophy Department and was a member of the History Department. He earned his Ph.D. in physics from Humboldt University, Berlin, Germany in 1932. During World War II, Yourgrau edited an anti-fascist German-language weekly, The Orient. He was editor of Foundations...