y » 



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Fig. 9. Multiple hemorrhages, pyknosis. and rhexis ol tissue cells and of emigrated 

 polymorphonuclear leucocytes in a necrotic region of the same type as in Fig. 8 and 

 produced by the same x-ray dose. H. and E. 









Fig. 10. Nearly complete representation of the capillary bed of the cerebal cortex 

 by India ink, 50 hours after local irradiation of a Syrian hamster with 20.000 r. 



219 



