



Fig. 2. Showing complete littermates of A-strain scries on day 35 

 (without niortahty in this particular case). Mouse T (normal 

 control) weighs 13-3 g. Mouse C+S(f) (treated at birth with 

 CBA spleen cells + facilitating CBA serum) weighs 10 • 4 g. Mice C 

 (treated at birth with CBA spleen cells + normal CBA serum) 

 weigh respectively 9-5 and 6-2 g. 



To face p. 301 



