21 May 1965
Vol 148, Issue 3673

About The Cover

Relief of an ancient seall from Persia (Sassanian Period A.D. 200 to 600) shows two men greeting one another. The figure on the right carries a bow. Original height of figures, 13mm. Photographic reversal of intaglio to relief occurs after photographing objects in polarized light and then combining negative and positive transparencies. See page 1089. [C. A. Erskine, University of Dublin]