672 THE AMERICAN NATURALIST [Vol. XLV 



(c) Normal cotton blossom pinned in position as a 

 control. 



During the forenoon the weather was dull, so that bees 

 were less frequent in their visits. 



Experiment No. 26. — August 1. Period of observa- 

 tions one half hour, from 9:00 to 9:30 a.m. Blossoms 

 arranged in same row as follows: 



(a) Normal cotton blossom with honey at base of 

 petals within. 



(b) Normal cotton blossom pinned in position as a 

 control. 



(c) Normal cotton blossom pinned in position as a 

 control. 



1 



ll 

 1 



1 















1 



a 

 I 



26 



ft 



j 



22 

 17 



J 



! 



1 1 



III 



jl 



2 



1 

 | 



i 



t 



III 

 ii 



i 



J J 



Experiment No. 27.— August 1. Period of observa- 

 tions one half hour, from 9 :00 to 9 :30 a.m. Blossoms are 

 arranged in the same row. 



At {a) an unmutilated cotton blossom was pinned in 

 position. Portions of cotton leaves were carefully cut 

 out and fastened outside and within the blossom in such 

 a manner as to extend just to the margin of the petals on 

 both sides. In this way none of the yellow color of the 

 petals remained visible. The stamen tube, pistil, etc., 

 projected as in a normal blossom. The blossom was 

 practically without petals, since these were not visible, 

 although such odors as they may have possessed could 

 still diffuse around the blossom. A drop or two of honey 

 was also added at the base of the petals within in order 

 to make certain that agreeable odors were present, since 



