NEUTRON EFFECTS OX ANIMALS 



33 



paralysis. This paralj^sis was first noticed seven days previously and was 

 of unkno^^Tl etiology, unless associated with the malignant growth found 

 microscopically in most organs. All organs were grossly normal with the 



WEIGHT 

 CRAMS I 

 170 \ 



160 



150 



Vi.l 



I I 



LEUKOCYTES 

 X 103 



15 



10 

 5 



I 



V 



LYMPHOCYTES 



80 

 60 

 40 



\ 



/ 



V- 



/ 



ERYTHROCYTES 

 X I0« 



8 •. 



6 



A 



.•—•—•. 



>•— -^t 



'/ 



HEMOGLOBIN 

 GRAMS 



14 



V 



\ 



•\ 



40 



80 



120 



DAYS 



160 



200 



240 



Fig. 2. Changes in body weight and hematoh)gical data from the day of the initial 

 neutron dose for rats receiving twelve lU-n doses of neutrons. Deaths during the 

 course of the experiment are indicated by arrows. 



exception of an enlarged and dense spleen showing numerous white nodules. 

 Microscopically, this organ was found to be massively infiltrated with 

 highly undifferentiated timior cells resulting in the almost complete obliter- 



