Table 1. The methods used in the ion-exchange experiments Experiment wet Weight Digesting ash procedure (gms ) I Clam kidney Column size (mm ) Flow rate resin mesh ml/minute size 1.10 0.142 0.2 N HCl 8x100 50-100 0.5 7.29 0.213 #£Aqua regia 6x50 50-100 0.5 8.90 0.202 Perchloric 6x100 100-200 0.5 6x100 100-200 0.5 6x100 100-200 0.5 6x100 100-200 0.2--0.5 Eniwetok Atoll 9-22-56 II + Fish livers Bikini Atoll 9-1956 III Bonito livers Fox Is., Bikini Atoll and soncentrated 9-23-56 IV Fish livers’ Belle Is., Eniwetok Atoll 5-22-54 and HNO, 19.10 0.491 Perchlioric and concentrated HNO. 6~-6-54 V Top inch, island soil Belle Is., Cine ™ Saha 2 Eniwetok Atoll a 9-19-56 Spikes Celt4 pitt 5,90 6,60 M24 cat37 RylO6_pp19® 7.95. 4% 0.906 0.888 Concentrated HCl +704 0.994""* Concentrated Cb?>,2n©5, re>9 + + OE +e HCL Mullet, jack, grouper, surgeon, and big-eye Miscellaneous reef fish Dry weight . Island soil from Kusaie Atoll collected 7-5-56 used as carrier