294 EVIDENT POWEK OF 



or three bees paid twentj-one visits to the orange and 

 yellow, and only four to all the other slips of glass. I 

 then moved the glass, after which, out of thirty-two 

 visits, twenty-two were to the orange and yellow. 

 This was due, I believe, to the bee having been placed 

 on the orange at the beginning of the experiment. 

 I do not attribute it to any preference for the 

 orange or yellow ; indeed, I shall presently give reasons 

 for considering that blue is the favoui-ite colour of 

 bees. 



October 6. — I had ranged my colours in a line, with 

 the blue at one end. It was a cold morning, and only 

 one bee came. She had been several times the pre- 

 ceding day, generally to the honey which was on the 

 blue paper. This day also she came to the blue ; I 

 moved the blue gradually along the line one stage 

 every half-hour, during which time she paid fifteen 

 visits to the honey, in every case going to that which 

 was on the blue paper. 



Again, on September 13 at 11 a.m., I brought up a 

 bee from one of my hives ; at 11 .40 she returned to 

 honey which I had put on a slip of glass on green papei. 

 She returned at 11.61. And again at 



12. 1 



12.13 



12.22 



12.33 

 „ 12.46 



12.58 



