tological section of these area revealed patchy loss of pigmentcells at the base of the epidermis and slightly edematous upper dermis andpapillae. The blood vessels showed slight vacuolation of the media of the muscular arteries, but no evidence of inflammation or neoplasm was found as well as 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, small alopecias were still observed (T-2 and 7). Thin hairs grew in the area. In T-7, grey 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 punctata was noted in T-6 who was examined in Tokushima’ University Hospital. As to the neuroretinal findings, slight opacities and pigmentation of macula were found in 3 cases, and slight arterio-sclerosis were observed in 4 cases. In general, it is still 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. E. Haematological Examinations The results of haematological examinations are presented in Table 4. a. Peripheral blood Leucocytes: Leucocyte numbers were dis- (K~8). tributed between 4,200 and 9,400. D. Ophthalmological Examinations Ophthalmological examinations were carried in normal rangein 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 out on 14 hospitalized persons and 3 outpatients by Dr. S. Kubota, National Hospital of Chiba, ' and Dr. N. Hirota, Yaizu City Hospital, respectively. The results are presented in Table 3. Table 3. Ophthalmological Examinations Pterygium and pinguccula..-..-9 (T-3, T-8, K-2, K-4, K-5, K-8, K-11, K-13, K-16) Corneal PIZMENE-rcrreccesescsesceacs 3 (K-2, K-4, K-10) Vasculalisation «+sssccsssscsrerenes2 (K-4, K-13) Keratitis Giffuisacessccsccssnnesccsnes 2 (T-3, K-5) Arcus SOriilig ccccccenccccccsscccceens 1 (K-11 Lenticularopacities -sesssssssees 7 (T-2, T-3, T-6, T-7, K-5, K-11, K-16) Vitreus Opacitics --eccscerscsscenes 1 (K-8) Macular degeneration++-++cess 3 (T-3, K-2, K-5) Retinal arteriosclerosis .+++.+++. 5 (T-2, K-4, K-5, K-6, K-~9) Strabismus «sscccccsssssssaseccesensss2 (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; i. ¢. Cases T-2 and T-7 showed slight opacity of posterior capsule, cases T~3, K-5 and K-11 had opacities of : ortices. Case K-16 showed slight opacities vu. posterior cortex. Cataracta Neutrophils: Numbers of neutrophils were which showed lymphocyte level below 2,000 ‘in every examination. Eosinophils: Case K-2 sisowed eosinophilia 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). Comparing 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 196] survey. Monocytes: No pathological data was obtained on these cells. T-3, K-5 and K-4 werechosen 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 lymphocytes 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. Platelets: Platelets counts (130~510 x 10°) were normal. Erythropoietic elements: Between the exposed