oe ' eee: a 7 a : Figure 9. Trust Territory ship used for 1960 survey, anchored in the lagoon off Rongelapvillage. Table 2 Percent Distribution of Population by Age Groups Rongelap control Rongelap exposed Age, vr (206 people, 1959) (102 people, 1959) <15 [5-24 25-44 45-64 > 65 45.6% 11.2 23.8 15.0 4.4 Medianage, yr 19.0 on the exposed population only. The histories were taken by one of the Marshallese doctors. Complete physical examinations were done, butspecial examinations, such as slit-lamp studies of the lens and anthropometric measurements on the children (except for height and weight), were not made. One hematological examination was carried out on the exposed population which included WBC by electronic counting technique (Coulter), differential smears, smears for alkaline phosphatase staining, and basophil counts. About thirty 24-hr urine samples were collected from exposed and unexposed people for radiochemical analysis to determine body burdensof Sr®°, Marshall Islands US (1948-30) (1940: 49.0% 12.7 20.6 10.8 6.9 33.8% 18.9 25.9 15.5 9.9 25.1% 18.2 301 19.8 6.8 16.2 23.6 — 29.0 Results and Discussion The results of the 5- and 6-year post-ex posure surveys will generally be reported together. INTERVAL MEDICAL HISTORY The census of Rongelap as of 1959 was 308 people, of whom 82 had been exposed, 20 were children born of the exposed, and 206 were unexposed. A census was not taken in 1960, but the numberof people appeared to be about the same. Table 2 shows the percentage distribution in the population for the Rongelap exposed and unex-