TABLE 9 



Showing the average body iveights at different ages of inbred rats of the B series sepa- 

 rated into three groups according to the generation to which the individuals 

 belonged 



* One record only. 



TABLE 10 



Showing the average body weights at different ages of inbred rats of the combined 

 series (A, B) separated into three groups according to the generation to which 

 the individuals belonged 



20 



