: i loots KF d L O TOTAL B- ACTIVITY Lig d/m/g WET] © $790 + y90-activITy i Lo 3 ~ | $r89+ 5790 peEcay _ — =_y re nf 104 Re ta# i é # | y ‘ = \ a \ yh AA a . «al _| a 100 Fig. 2, rw oN tow 3-4.wots Nsr90 pecay i / Sr89 ae) SITS _ ee ° = a — DECAY 4 \ / 4 ¥ ~ L 200 300 DAYS LL AFTER 400 MAY i4, 300 1954 | 600 | 7900 Radioactivity in Coenobita carapace on successive collection dates compared with the decay of radiostrontium, Values in disintegrations per minute per gram wet weight.