12 



HELEN DEAN KING 



TABLE 3 



Showing the increase in the weight of the body with age for rats belonging in the 

 first six generations of the inbred series. A combination of the data in table 1 

 and in table 2 



* Record not used in constructing graph. 



A comparison of the data in table 3 with body weight data for 

 a series of stock albino rats reared as controls for the inbred 

 series after the change to 'scrap' diet had been made (table 13) 

 will show to what extent malnutrition decreased the body size 

 of the individuals in the first six inbred generations. Graphi- 

 cally this result is shown in figure 11 and in figure 12 (compare 

 graph D with graph A and graph C). 



Body weight data were taken, at the intervals stated, for 99 

 males and for 76 females belonging in the seventh to the fifteenth 

 generation of the A series of inbreds. The average body weights 

 of the males at different age periods are shown, by generations, 

 in table 4 : corresponding data for the females are given in table 5. 



Data for 57 males and for 93 females belonging in the seventh 

 to the fifteenth generations of the B series of inbreds are shown 

 according to generations in table 6 and in table 7. 



