SUSCEPTIBILITY TO TRANSPLANTABLE TUMORS 



115 



Normal 1491 negative : 95 reactions ±6.37 or 5.99% db 0.40 



Gonadcctom. 2640 negative : 103 reactions ±6.71 or 3.75% ± 0.25 



Difference 2.24% ± 0.47 



The difference is thus 4.77 times its probable error 



There is no significant difference between any two correspond- 

 ing points of the curves, although when the data are massed 



PERCENT. OO 



REACTIONS O^ 



GONADECTOMIZED 



d Br A»d. Br B 



33 



NORMAL d Br B 



"A" d. Br. B \ 



d. Br B 



ADAPTATION 



Figures 32 and 33 



there appears to be a significant lower percentage reactions on 

 the part of the gonadectomized individuals. This difference, 

 however, is mainly confined to the first part of the curve. In- 

 deed, this decrease of positive reactions is confined to the first 

 inoculation series (just after the operation). It is justifiable 

 to maintain, therefore, that there is no visible significant differ- 

 ence between the percentage reactions for normal and gonadec- 



