The Dancing Mouse 



learned to avoid red. Therefore we are still confronted with 

 the question, can they see colors? 



The account of my color vision experiments is finished. 

 If it be objected that other than visual conditions may ac- 

 count for whatever measure of discriminating ability, apart 

 from brightness discrimination, appears in some of the series, 



TABLE 29 



VISUAL CHECK TESTS 



With the Electric-boxes Precisely Alike Visually 



the results of the series of Table 29, in which all conceivable 

 visual means of discrimination were purposely excluded, and 

 those of the several check tests which have been described 

 from time to time in the foregoing account, should furnish a 

 satisfactory and definite answer. I am satisfied that what- 

 ever discrimination occurred was due to vision ; whether we 

 are justified in calling it color vision is quite another question. 

 I conclude from my experimental study of vision that 

 although the dancer does not possess a color sense like ours, 



