tological section of these area revealed patchy loss of pigment cells at the base of the epidermis and slightly edematous upper dermis and papillae. The blood vessels showed siight the media of the vacuolation of muscular arteries, but no evidence of inflammation or neoplasm was found as well .s chronic dermatitis (Drs, M. Seki and T. Yoneyama) (Plates 2 and 3). These findings are similar to those observed in the Marshallese!’ In two cases who showed complete epilation, punctata was noted in T-6 who was examined in Tokushima University Hospital. As to the neurovetinal findings, slight opacities and piymentation of macula were found in 3 cases, and slight arterio-sclerosis were observed in + cases. In general. it is scill early to decide whether these abnormalities in the exposed persons were late effects of the exposure in 1954 or not. Precise observations should be continued. small alopecias were still observed (T 2 and 7). Thin hairs grew in the area. In T-7, erev hairs seemed to be much comparing with age. Besides those area, residual beta burns were observed in small area of wrists (T-6 and K-7), external ears (T-2, 7,8 and K-6), foot and leg CK-8). D. Ophthalmological examinations were carried out on Lt hospitalized persons and 3 outpatients by Dr. S Kubota, National Hospital of Chiba, and Di. N. Hirota, Yaizu City Hospital. respectively. The results are presented in Table 3. Table 3. Ophthalmological Examinations Pterygium and pinguecula.---- 9 CT 3, T-8 K-2, Corneal pigment:sr-cerrecseeseereees 3 (K-2, K-4, K-10) Vasculalisation Keratitis diffusare-:---cecereeeeees 2 (T-3, K-53 Arcus senilig cccccscsessssceeveeeeens 1 (K-11) -+.+1e.esreee 7 (T-2, T-3, T-6, which had continued since acute stage. No sign of parasite was proved. Basophils: As to basophils, the rate to 3,000 leucocytes was calculated (Table 5). csccccsssreerseeeees 2 (K-4, K-13) Lenticularopacities Neutrophily: Numbers of neutrophils were in normal range in all the cases except Case T-3. Obvious shift to the left of nuclei was not found, Lymphocytes: Numbers of lymphocytes were over 2,000 in all the cases except Case T-6 which showed lymphocyte level below 2,000 in every examination. Losinophits: Case K-2 showed eosinophilia K-4, K-5, K-8, K-11], K-13, K-16) T-7, K-5, K-l1, K-16) Vitrens GPACities veeeeeeseseeeeee 1 (K-8) Retinal Haematological Examinations The results of haematological examinations are presented in Table 4. a. Peripheral blood Leucorytes: Leucocyte numbers were distributed between +200 and 9,400. Ophthalmological Examinations Macular E. degeneration+:--.+++++- 3 (T-3, KR-2, K-5) arteriosclerasis +--+. 5 (T-2, K-4, K 5. K 6, K-9) Strabismits ccsceceteceseseceeessceetes 2 (K-4, K-10) Pterygium and pinguecula were observed in 9 persons. Corneal pigmentation was proved in 3 cases. Lenticular opacities were noted in 7 cases: /. e. Cases T-2 and T-7 showed slight opacity of Com- paring with that of normal persons, slightly high percentage of basophils was observed in Case K-2 and Case K-9. The latter showed similar rate in 1961 survey. Monocytes: No pathological data was obtained on these cells. T-3, K-5 and K-4 were chosen as representing cases at the acute stage with signs and symptoms of marked degree, of moderate degree, and of minimal degree, respectively. The changes of WBC, neutrophils and [ymphocytes are illustrated in Fig. 6-A, B and C. T-3 showed slightly decreased values. Considering the myelogram of T-3, a slight maturation arrest of myeloid cells might exist. posterior capsule, cases T-3. K-35 and K-11 had Platelets: opacities of subcortices. Case K-16 showed slight opacities of posterior cortex, Cataracta were normal. Platelets counts (130~510 x 10°) Erythropotetic elements: Between the exposed