Contents

29 March 1974
Vol 183, Issue 4131

About The Cover

A view of Venus from 720,000 kilometers taken by the television cameras on Mariner 10 one day after encounter. Individual frames were computer-enhanced by the Image Processing Laboratory, then mosaicked and retouched at the Division of Astrogeology,U.S.Geogical Survey in Flagstaff.The frames were taken in invisible ultraviolet light and are printed here in shades of blue.See page 1307.