ehgaghh ne arseAyan sone " ol} , han: the soubhern birds, ©hae: was not:the’cane:except’forthe: : Pside. ghe ratios, south to north, of activity for the different organsand tlasues are as follows: skin 19 rusele 52 bone 62 lung liver kidney | ileum . 39 53° 48 9 6a The presence of more then ehx. times as much activity in the tne \ testinal tract of the southern faland terns as that found in the te hat birds have access te a supply of food fish containing greater te amounts of radioactive material, ‘The higher level of activity in ss the southern bird intestinal‘tractsis reflected in ‘the greater * be hs SR oT Rg compaccsors epg fe ! same organ of the. northern island terns suggeats that the southern a concentrations of radioactivematerial in the otherinternal organs of the same animals. th view of these observations it: - probably would be advisable toobtain samples from“AlAnginae Atoll, located seven and ‘one-half nautdeal miles southwest of . Rongelap Atoll, since the ‘Rongelap natives collect birds at Alinginae as part of their food supply. . "Pern ages were collected‘at Kabelle july 16, Decenber a, 1954, and January 29, 1955. the levels of radloactivity inthe various partes of ‘the eres were low, with that of the shell approx= imating the levels found in the bones of terns collected the same day; ‘RadLoactivity in the egg yolkavariedfrom 1} to3 times: | that found in the muscles of birds in the same collections. "the whites of the egas contained the Lowest amountsof radioactive m. isotopes ef all bird canples éxamined. “Ghese ‘levels were from 1/25 to 1/2 those found in bird mugele collected the same day. The unhatched embryos contained levels of radioactivity approxMeee ag ce aren = SSONTDENTIA= a $e f| ; ay &