Y. LEVY et al. 213 ot obtained method. the alpha trations by ms cut per- for 30 days rs exposed e following n the 1954— ‘ntrated in : damaged ire (Figs. 3, the coral years 1954 n? (Fig. 3). on detecth sections 800 pCi/g ed chalky the coral. 720 pCi/g '54 growth 1 of alpha the coral onship bethe alpha éctions of slabs cut me gatle st year at t possible juring cut- A egRR gnates the an oe 1 region of : using the yut it was efore 1954. location of sections a, b and c (reflected light). by using a d contained No75). Celectly to the Fic. 2. Photograph of surface of coral Favites virens slab with outline of area analyzed and tector to a