10 5. { | 7 ~y PLATE 5953 a | c/m/ SAMPLE OO PLATE 11306 @ @ PLATE 5520 10 3 L 100 AAIHOUYV JOd 3/ Fig. 4. 1 200 \ 300 DAYS AFTER ! 400 MAY I 14, 500 1954 | 600 700 Decay of beta-activity in three Coenobita carapace samples, each compared with the theoretical decay curve ( solid lines ) for sr89 + Sr99 from Figures 2 and 3. _ -2eTt- @ 104