spermia was found in 16 cases in November1954, e.g. about 8 monthsafter the detonation. Both lowering of motility and morphological abnor- malities of spermatozoa were also observed. The testicle of the fatal case, which died 906 days after the explosion, was remarkably _atrophic, possessing the interstitial tissue composed of loosely arranged connective tissue. Spermatogonia were greatly decreased in number, and in some areas they were completely lacking. No sperm was encountered within the lumen of cither seminiferous tubules or epididymis. Indications of recovery were observed at about one year after the explosion in some patients, but number of spermatozoa wasstill far below normal value in all the cases. Most of them began to reveal a sign of regeneration about 2 years after the exposure, and got children (Fig. 1 | 0 | 1 954. Fig. 5. ‘1938 1956S 1958 1959 Changes in the Number of Spermatozoa 5. Liver Function Slight disturbances of the liver function were found in a few cases about 4 weeks after the initial exposure. Later it became more obvious, i.e. the repeated appearance of jaundice in several cases, an increase of serum gamma-globulin con- 5 and Table 2). Table 2, Marriage and Childbirth of the Patients ae 1954 T-1 M (2) 5 6 M (4) M (3) 2 3 7 1955 1956 1957 A M (3) M (2) 8 3 4 5 6 7 Mose Marriage TI cooeee Male f Ml om ( f 22 M 25 m m m f Aceeees Abortus 24 22 26 18 m m 23 22 24 23 f m f oA f Jereeee No. of children at the time of exposure fe oesee Female 25 M f M f ! { M f M | | f M f m 97 f M m M 30 28 26 M ! ,,Aee in, M m M m M (3) M (2) 1963 ¢ IM 12 1962 38 28 M 9 10 W 1961 27 m, 8 13 +14 15 16 1960 f M 2 1959 f M K- | 1958 af renee Fatal case m 18 22 39 27 20