Contents

22 November 1974
Vol 186, Issue 4165

About The Cover

Aerial view of the 1.1-milliwatt electric Morgantown Generating Station, on the Potomac River 60 kilometers south of downtown Washington, D.C. Isolated plumes from the power plant are a significant source of atmospheric ozone far downwind of the power plant. See page 733. [Gary M. Klauber, University of Maryland, College Park]