320 EXPERIMENTS WITH COLOURED PAPERS. 



I now put vermilion instead of green, and moved 

 both of them a foot, but so that the vermilion was 

 nearest the window, though touching the blue ; she 

 came to the vermilion. 



Again, September 11, I marked a wasp. She re- 

 turned to the honey over and over again with her usual 

 assiduity. The following morning I put the honey on 

 green paper; she came backwards and forwards all day. 

 On the 13th I opened my window at 6.8, and she came 

 in immediately. During an hour she made ten 

 journeys. On her leaving the honey for the eleventh 

 time, I placed some honey on vermilion paper where 

 the green had been, and put the honey and the green 

 paper about a foot off. 



She came at 7.25 to the vermilion. I then put orange 



instead of vermilion. 

 „ 7.34 „ orange. I then put blue 



instead of orange. 

 „ 7.40 „ blue. I then put white in- 



stead of blue. 

 „ 7.47 „ white. I then put yellow in- 



stead of white. 

 J, 7.55 „ yellow and then to the green. 



I transposed the colours. 

 J, 8. 2 „ green. I then moved both 



colours about a foot, but so that the yellow was a little 

 nearer to the old place. 



She returned at 8.9 to the yellow. 



