294 EVIDENT POWER OF 
or three bees paid twenty-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 favourite 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 4.m., I brought up a 
bee from one of my hives; at 11.40 she returned to 
honey which I had put ona slip of glass on green paper. 
She returned at 11.51. And again at 
12. 1 
> 12.13 
ie 12.22 
2 12.33 
3 12.46 
3 12.58 
