NEUTRON EFFECTS ON ANIMALS 



117 



exposures. One rabbit receiving 165 n died 3 weeks after cessation of 

 irradiation, while another receiving the same dosage appeared to recover 



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 S'rn/OAV 





O 10 ZO 30 40 so 60 70 80 90 100 



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Fig. 1. Relationship between neutron irradiation of rabbits and their total white 

 bloodcell counts. The ordinate represents total white blood cell count ; the abscissa 

 time in days. Arrows indicate days on which the irradiation was administered. 



normal health. Of two rabbits given 220 n, one died 2 weeks after irradi- 

 ation; the other, the white cell data for which are shown in Fig. Ic, made a 

 temporary recovery for the first 5 weeks, after which, however, the white 



