ALCOHOLISM AND BEHAVIOR OF WHITE RATS 



255 



CENTIMETERS 



1440 



1200 



960 



720 



480 



240 



DISTANCE PER DAY 



EXCLUDING FAILURE RATS 



CONTROLS 



Fig. 9 Learning curve based on distance; averages per trial on each day of 

 training and retention. The broken lines are tests; the solid lines, controls. 

 Units on the base line are days, units on the vertical scale are centimeters. The 

 first series of days give training; the second series, retention. Males and females 

 in all strains are put together in all averages. Based on the 'completes' and 

 'incompletes.' 



