42 



GARDNER CHENEY BASSET 



by the solid line. The ordinates show the average daily time 

 in seconds for each group, and the abscissae the number of the 

 day in which such .time was made. Both curves in the learning 

 series are very irregular, especially so that of the eighth genera- 

 tion rats. Although irregular, the seventh generation curve lies 



Plate X 

 Thf Inclined Plaae 



ItvU.. 



below that of the eighth except in a few instances. From the 

 first, the relearning curves are similar and very regular, although 

 the eighth generation curve remains below that of the seventh 

 all the way. But both of the relearning groups are selected, 

 four of the seventh and seven of the eighth generation having 

 failed to learn the inclined plane. 



