52 



record but the lowest distance record, while the rat requiring 



the greatest number of trials (56) had a time record lower than 



the average, with the highest distance record. The highest 



time record v\a3 made by a rat which I'lnished in forty-three 



trials, whcse distance record was excelled by one other, the 



lowest, by one which finished in thirty-two trials with a dis- 

 tance record next to the lovrest, 

 Grouj. averages are: 



Time 

 Trials Absolute Total Distance Speed 



38 10.8 sec. 554 min. 332.9 m. 10.6 cm. 



per sec. 



Discussion of the curves seems hardly worth while in view 

 of the smell number of results on \thich they are based. The 

 average niimber of trials lies between the two apices of the 

 trial curve, (Fig. 7-A), the average amount of total time requir- 

 ed, thirty-three hundred seconds agrees v.ith the second maximum 

 in the time curve, (Fig. 7-B), and the distance average lies 

 at the middle one of the three maxima of the distance curve. 

 (Pig. 7-C) Mean variations for the group are: 



Trials S8 ± 8 Zl'f, variation 



Time 554 min. ±- 239 min 43^;:. 



Distance 532.9 m. ± 104.8 m 31;^^ " 



The distance variation is seen to be considerubly less tlian the 

 time variation, and exactly the sace as the trial variation. 



