HABIT FORMATION IX THE ALBINO RAT 



33 



Figure 5-c Distance Curve for Two Hundred Day Rats. 



If the averages for the males and females be compared, it 

 appears that the former are somewhat superior to the latter 

 except in absolute time. The averages are: 



Time 



Three Hundred Day Rats 



This group consisted of twenty-eight rats from ten families, 

 thirteen males and fifteen females, who began the problem when 

 three hundred days old. 



