-15- noted: wi81.185 contributed the major portion of the radio- activity in Scaevola leaves from Kusaie and in Messerschmidia and Scaevola leaves from Ujelang (Lowman tal, 1959), and Zn 65 was predominant in fish tissues from Ponape and Utirik. co?” was present usually in lesser amounts, and co?8 and co® were found only in a sample of clam kidney from Ujelang and a fish liver sample from Utirik. Other radioisotopes were present only in a few samples. C537, for example, was found in plants from Kapingamarangi and Utirik, cei41, 144_ 5,144 yy a few samples from Kusaie, Ponape and Ujelang, and Mn°4 in fish skin and gut from Ponape and clam kidney from Ujelang. Fe59 was detected once only, from Ponape. in a sample of skipjack muscle Department of Energy Historian’s Office ARCHIVES The quantitative results of the gamma spectrum analyses shown in Table 3 are based on analyses made approximately eighteen months after the samples were collected; consequently the shorter~-lived radioisotopes Zr 95—Nb?> coP8 (71 days) Rut03_py103 (half life 65 days), (40 days) and cel4t (32 days) had decayed to insignificant or non-detectable levels. gram sample of yellow-fin tuna from Ponape, however, were found in low amounts In a 16l=Zr 9 =NbI5 (0.12 jyic/g at time of counting); at time of collection the level of Zr95-nb9> would have been 40 pyc/g. K4° was present in all samples analyzed. In some