Fig. 5 Graphs showing the increase in the weight of the body with age for 

 males belonging in the sixteenth to the twenty-fifth generations of the two series 

 (A and B) of inbred rats (data in table 8 and in table 9). 



Fig. 6 Graphs showing the increase in the weight of the body with age for 

 females belonging in the sixteenth to the twenty-fifth generations of the two 

 series (A and B) of inbred rats (data in table 8 and in table 9) . 



85 



