76 



HELEN DEAN KING AND HENRY H. DONALDSON 



TABLE 12 



General data on the number, age, body length, and body weight of the gray 

 Norway rats used for this study and the deviations of the observed body weight 

 from the body weight as given in the reference table 187 {The Bat, '24) for 

 the observed body length,. Charts 12 and 13. Females 



Generation: G ( _ 



Length 

 250 



E30 



Chart 12 Body length in millimeters. 



-, male; , female. 



BODY WEIGHT ON OBSEEVED BODY LENGTH STANDARD : WILD 

 GRAY NOEWAY. Reference table 187 



When the data in the last columns of tables 11 and 12 are 

 plotted in chart 13, it is seen that the body weight of the cap- 

 tive Grays tends to increase from G! to GI O . The two sexes 

 behave in a similar manner, though the male is a trifle more 



