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Fig. 8. Damaged cellular elements in the cerebral cortex at relatively early stages 

 following alpha particle radiation at 6,000 rad surface dose level. A. (6 hr) Nuclear 

 breakdown in satellite glial cell. X720. B. (12 hr) Chromatin particles of disintegrated 

 cell of undetermined nature. X 1170. C. (16 hr) Severely damaged nerve cells and 

 glia in loosened tissue. Some of the pyknotic elements may have been as large as the 

 nerve cell and its glial satellite in the upper right corner of the photograph. The large 

 clear nucleus with the constriction is probably that of a damaged nerve cell. X900. 

 D. (42 hr) Severely damaged cellular element. X1170. E. (8 days) Two mitotic 

 figures are to be seen. X440. Van Gieson-hematoxylin stain. 



394 



