-24 - levels, hemoglobin, hematocrit, and RBC are similar in both groups, Sedi- mentation rates are faster than those seen in the Caucasian populations, The reasons for this are not readily apparent, to remain about the same for both groups, Serum protein values continue The only noticable difference between the children of exposed and those of unexposed parents was‘in the slightly higher platelet levels in children of exposed parents, and males +10%). (Males +147, Over the past four years this has been generally true, especially in the females, Studies in Progress Chromosome studies on a Large number of smears obtained from peripheral blood cultures in the Marshallese are in the final stages of processing at the Cancer Research Institute in Boston, It is expected that a complete report of these findings will be forthcoming in the near future. Further blood volume studies were done on 6 Caucasian people living in the Marshall Islands during the past survey, Tritiated water was used for determination of lean body mass as related to blood volume and stay for red cell mass determinations. These data continue to show that people living in the Islands, both Marshallese and Caucasians have reduced blood and red cell volumes, SUMMARY AND CONCLUSIONS The medical survey of the Rongelap people who had been exposed to radioactive fallout 11 years ago was conducted in March 1965, and during the following september a thyroid resurvey was carried out, This interim report summarizes the major findings, and details will be included in the more comprehensive 11 and 12 year report following the forthcoming survey in March 1966. 500 7u38

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