42 



record by one finishing in twenty-sevon trials, whose time was 

 consiierably above the average. 



The averages for this group are-. 



Time 

 Trials Absolute Total Distance J] eed 



42 8.6 sees. 351 min. 35&.1 m. 16 cm. per sec. 



The apex of the trial curve, (/ig. 5-A,)lies at thirty-three, 

 while the average for the group is forty -one, but the explana- 

 tion of the apparent discrepancy is to be found in the records 

 of the six rats who required from fifty-six to one hundred twelve 

 trials to learn the problem, thus running the group average up. 

 No well defined apex can be found in the time curve (Pig. 5-S) 

 the group average, twenty -one hundred seconds showing rather as 

 a depression, nor could it be divined by a glance at the dis- 

 tance curve that the average lay in the neighborhood of thirty- 

 three thousand cm. 



The average mean variations are: 



Trials 42 ± 21 bZ'fo variation 



Time 852 min. ± 171 min 48/^ 



Distance 339.1 m. ± 156.2 n 46';^ " 



The distance variation is again the least. 



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

 appears that the former are somewhat superior to the latter ex- 

 cept in absolute time. The averages are: 



