22 



HELEN DEAN KING 



Figure 6 shows graphs for the weight increase with age in all 

 of the inbred males for which weight records were taken (data in 

 table 3 and in table 10). 



As the position of the graphs in figure 6 show, males of the 

 seventh to the ninth inbred generations (graph A) were animals 

 of unusually large size and they were considerably heavier, 

 after reaching maturity, than their own progeny of like age. At 

 the 365 day period the space between graph A and graph B in- 

 dicates a difference of about 50 grams in the average body 



60 80 100 120 140 150 180 200 220 240 260 280 300 320 340 360 380 400 420 440 460 480 



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

 females belonging to various generation groups of the B series of inbreds (data 

 in table 2 and in table 9: lettering as in figure 2). 



weights of the two groups of animals. From the tenth genera- 

 tion on the course of growth in body weight' was practically the 

 same in all inbred males, as is shown by the fact that graph B 

 and graph C run very close together throughout their entire 

 length. 



Figure 7 shows graphs for the body weight increase in the 

 series of inbred females (data in table 3 and in table 10). 



The relative position of the graphs in figure 7 show that, 

 with the exception of the animals in the first six inbred genera- 



