



7^ 







Figs. 1 and 2. Radiation damage 2 hours after exposure to 60,000 r. Plane of the 

 section is parallel to the direction of the x-ray beam. Vacuolation of molecular layer, 

 shrinkage of Purkinje cells, and pyknosis of the nuclei of granule cells occur in the 

 most severely damaged area of the granular layer, and nuclear swelling in the lower 

 part. Fig. 1 : X 40. Hematoxylin-eosin. Fig. 2: X 170. v. Gieson-stain. 



193 



