-14- . O£ radioactivity, indicating that these islands, Bikar, Likiep and Rongerik (Appendix Tables A, D, F, and K), had become contaminated with the 1954 Bravo test fallout as ha Rongelap Atoll. Of special redioactivity in the island soil, and the low levels in the Rongerik. and we there, note are the high levels of fish liver and viscera coconut samples collected at Later collections were not made at these islands do not know whether further contamination occurred as it did at islands to the south and west of the test site. Birds were sampled only at Ujelang, in 1955 and at Tarawa in 1956. The Bikar and Rongerik 1955 samples contained relatively high levels of beta radioactivity, whereas from Tarawa contained low levels. from Tarawa (Appendix Table G), those The white of a tern egg however, contained more beta radioactivity (99 d/m/g) than any other tissue sampled, and fish, a principal food item of these birds, tained significant amounts of radioactivity. also con- Department of Eneray Wistorian’s Office ARCHIVES Qualitative analyses of gamma spectra also give an indi- cation of the quantity of the isotopes present. this kind made shortly after the 1958 collections Table L) Analyses of (Appendix show that gr2°-Nb?> and Ryt03, 106 _py,103, 106 were the predominant radioisotopes in the samples. Two exceptions were