Contents

13 June 1947
Vol 105, Issue 2737

About The Cover

Telescopic cameras of the U. S. Army Air Forces-National Geographic Society Eclipse Expedition being prepared for use during the total eclipse of the sun at Bocayuva, Brazil, May 20. The camera at the right was devised by Dr. George Van Biesbroeck (seated), of the Yerkes Observatory, to determine the Einstein shift.