DISTINGUISHING COLOURS. 301 
vation till the 28th, but not with reference to 
colours. 
August 24.—At 7.451 put another bee to honey 
on green paper, to which she kept on returning till 
9.44. The next day (August 25) she came at 7.38, and 
I let her come to the green paper till 9. The follow- 
ing morning she returued at 6 a.M., coming back as 
follows, viz. :— 
At 6.10 
6.18 
6.25 
6.35 
6.45 
6.54 
7. 3 
7.13 
I now put orange in place of green, and put the 
green a foot off. 
At 7.24 she returned to the green. I replaced the 
paper with the bee onit; and when she had gone I 
put light blue in place of the green, and again moved 
the green a foot off. 
At 7.36 she returned to the blue. I again replaced 
the paper with the bee on it; and when she had gone I 
put yellow in place of the green, and again moved the 
green a foot off. 
At 7.44 she returned to the green. I then did 
