-il- c Figure curves which tended to level out, 20-100 in the at first 2 counting | appear in Table 2. tained, suedeicm aes cit lightly and the flattest slopes that they at- The slow decays thus include almost all of the decays available for bird and rat as well as curves for muscle and kidney of most The slow rate for rats could be due to residual activity from animals. earlier detonations in the vicinity of Biijiri Island. Muscle with its high K*° content and kidney with (in the tridacnid clam) an affinity for strontium would be expected to exhibit slow radioactive decay. does Table 2. nvolving Summary of the nineteen curves from Table 1 and Figures 1-6, showing the most decided tendency toward leveling and the minimum steepness attained. * than for 1 of postnd to proher sur- 1e average Curve Organno. ism Tissue Latest; Curve slope no. Organism Tissue Latest slope 35 37 40 41 45 46 47 fish fish crab crab fish fish fish skin skin muscle muscle muscle muscle muscle -0.8 -0.8 -0.2 -1,0 -0.5 -0.9 -0.3 96 99 60 66 74 75 85 fish rat bird bird rat bird clam bone bone bone lung liver liver kidney -0.85 -0.03 -0. 63 -0.5 -0.3 -0.6 -0.5 49 rat muscle -0.06 87 rat kidney -0.4 s showing 48 Curve 49 50 fish bird muscle muscle -0.6 -Q.25 86 clam kidney -0.6 ith a half gamma g of those mua Wt Terres gy ree oe