170 



The Dancing Mouse 



Perfectly trained as they were, by their prolonged green- 

 red tests, to choose the green, or what in mouse experience 

 corresponds to our green, Nos. 2 and 5 offered an excellent 

 opportunity for further tests of blue-green discrimination. 

 For in view of their previous training there should be no 

 question of preference for the blue or of a tendency to depend 

 upon brightness in the series whose results constitute Table 27. 



To begin with, the blue and the green were made quite 



TABLE 27 

 BLUE-GREEN TESTS 



