ti-rftn -H 



20 40 60 80 100 120 140 160 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 



Fig. 13 Graphs showing the increase in the weight of the body with age for 

 males belonging in the fifteenth generation of the two series of inbreds com- 

 bined (A, B), and for males in the series of stock controls. 



Fig. 14 Graphs showing the increase in the weight of the body with age for 

 females belonging in the fifteenth generation of the two series of inbreds com- 

 bined (A, B), and for females in the series of stock controls. 



35 



