d/m/g SON, 9 10> a ‘ WET a iia Z i a 3 104 om i4 i sr89+ sr9O 7 7 DECAY _ un as an iF}J 4\ pr o~ ‘ ’ 8 . mt \ / iy NG QO = fs Fig. 2. “ © $590 + y90-activiTy L = tal O TOTAL P- ACTIVITY \ of R590 (tC Sr DECAY e Ssr89 { 200 | 300 DAYS AFTER | | 400 500 MAY 14, 1954 ~ ~ | 600 | 700 Radioactivity in Coenobita carapace on successive collection dates compared with the decay of radiostrontium. _ 4 7 DECAY ’ | 100 = Values in disintegrations per minute per gram wet weight. “7