



Fig. 1. (top left) (X 86) Testis, normal. 

 Fig. 2. (top right) (X 375) Testis, normal. 



Fig. 3. (bottom left) (X 86) Testis, 16 days after irradiation with 11.3 n. 

 Fig. 4. (bottom right) (X 86) Testis, 75 days after irradiation with 11.3 n. 



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