- 57 Radiochemical Analyses Radiochemica) analyses of some of the samples collected at Rongelap Atoll have been completed and the data are partially reported to show the trends of distribution. Detailed chemical] studies on the samples collected should be forthcoming from the samples sent to the New York Operations Office” and from other samples being studied in detail at the Applied Fish- eries Laboratory. The procedures used for the strontium and cerium determinations were the same as those described in UWFL-42. Analysis for cesium followed the method outlined in the Los Alamos report LA- 1566 11 Data for the analyses are given in Appendix Hand are summarized in text Tables 14 and 15. ; Radiostr ntium (Tables 14 and 15). The Sr 90°° values for food plants, except coconuts, collected in Octuber 1955 approximate the theoretical proportion of mixed fission products activity! 2 at 1.7 years, 4 percent. Coco- nuts ccntained 0.1 percent gr2° with appropriate correction for time of collection. This is roughly in agreement with values reported in UWFL-42 and USNRDL-454, assuming that Table 3.1, page 14, in the latter report includes radioactivity from Y 90 with sr2?, No sr°9 was found in the soft tissues of pelagic or reef fish or clams. Analysis of a single sample of bonito bone yielded a maximum Sr9° level of * Letters of October 26 and November 9, 1955 from Allyn H. Seymour, Applied Fisheries Laboratory, to Merrill Eisenbud, New York Operations. ** sr¥0 values given in text and tables do not include radioactivity due to the Y°~ daughter.