Priestley Medal ... Derek H.R. Barton, a winner of the 1969 Nobel Prize in chemistry and a Distinguished Professor of Chemistry at Texas A&M University, College Station, has been selected to receive the 1995 Priestley Medal, the American Chemical Society's (ACS) highest honor. Designed to commemorate the work of Joseph Priestley, an 18th-century chemist from Great Britain, the gold medal will be presented to Barton at ACS's national