556 



KARL T. WAUGH 



Results: The table gives the number of times each shade 

 was selected first, second, third, and fourth or last. 



YARN 



Black 



Dark gray . . . 

 Light gray. . . 

 White 



FIRST (HUH't 



SECOND CHOICE 



THIRD CHOICE FOURTH CHOICE 



12 

 5 



As seen from the table, the order of preference is (1) black, (2) 

 white, (3) dark gray, (4) light gray. 



The nest was next turned through 180 degrees and the yarns 

 were hung in the back of the cage, opposite where they had been 

 before, and another complete series of records of choices was 

 obtained in the same manner. The i-esults of this second series 

 are summarized in the following table: 



YARN 



Black 



Dark gray. . . 

 Light gray . . 

 White 



FIRST CHOICE SECOND CHOICE THIRD CHOICE FOURTH CHOICE 



3 



4 



14 



3 



The order of preference as shown from this table is (1) white, 

 (2) black, (3) dark gray, (4) light gray. 



The leaving of light gray till last in both series was so interest- 

 ing that it was thought well to make a check test to learn whether 

 the taste or odor of that particular dye was determining the ani- 

 mal's choice rather than the shade. A gray yarn was made by 

 twisting together a strand from the black and one from the white, 

 the two preferred yarns, and a set of 24 choices of the three yarns, 

 black, white and gray, was obtained. 



The results were as follows: 



