340 



ROBERT M. YERKES 



Thus, November 8 (table 2) proved to be a "bad" day as com- 

 pared with November 9. Likewise, November 10 proved to be 

 unfavorable, whereas November 11 was favorable (table 3). 



Av. of twenty trials 1.35 .4 122.4" 



Av. of twenty trials .5 



67.6" 



