- 31 - Rongelap and Bikini Atolls The wi85 content on Scaevola leaves at Rongelap Atoll on August 8, 1958, was higher than that in the same species at Nan Island (Bikini), Keith, Henry, and Leroy Islands (Eniwetok), and Ujelang Atoll (Table 3). These levels suggest that Rongelap Atoll received a greater amount of fallout than did the above islands with the exception of Leroy Island at Eniwetok Atoll. The latter island was contaminated heavily with fallout not containing wl85 as evidenced by the comparative levels of Cet4i+l44_prl41+144 (429,000 a/m/z), RYLOS+106_py103+106 (440,000 d/m/e) and Zr95-Nb95 (1,100,000 d/m/g) (Table 2) to those at Keith and Henry Islands. wi85 accounted for 89 per cent of the total radioactivity on Scaevola leaves collected at Rongelap on August 8, 1958, (Table 3, Fig. 8) and 90 per cent on leaves of the same species collected at Nan Island (Bikini) on August 28. Thus, the con- tamination on the plant leaves at both Bikini and Rongelap Atolls may be assumed to be due to recent fallout. from Nan Island, total; In topsoil wi85 accounted for only 33 per cent of the the isotope was not detected in soil from Rongelap (Table 3). The ratios of wi85 in the soil samples from Nan Island and Rongelap Atoll indicate that a significant part of the contamination was due to earlier fallout.