Twenty-third Annual meeting. 141 



The indication from the above is that during the day but two to seven per cent 

 of the heads turn from any given point through 90°. But there may be movements 

 through an arc of much smaller dimensions, and these are, of course, not here 

 indicated. Such movements are, however, shown in the tabulation below. 



It can be seen, upon cursory examination of the tables below, that, as a rule, the 

 heads while in bloom, move from morning to night, and from night to morning, 

 through only a very small space — that but few move through a space approaching 

 a half-circle, and in many cases there is no perceptible movement at all. 



Sdmmaey of the Table of Obsebvations. 



Total number of heads observed 328 



Total number cases of observations recorded 1,840 



Total number cases of movements of heads 1)214, or 66% 



Total number cases of no movement 626, or 44% 



SUMMAEY OF THE 1,840 CaSES RECORDED. 



DAY. 



Movements West 436, or 23.70% 



Movements East 152, or 8.26% 



Movements up 1.5, or 0.82% 



Movements N. to S 11, or jO.60% 



Movements S. to N 9, or 0.49% 



Movements East 401, or 21.79% 



Movements West 158, or 8.58% 



Movements up 14, or 0.76% 



Movements N. to S 9, or 0.49% 



Movements S. to N 9, or 0.49% 



No movements 243, or 13.20% | No movements 383, or 20 81% 



SUMMABY OF THE 1,214 HeADS THAT MoVED. 

 DAY. I' NIGHT. 



Movements West 436, or 69.98 % | Movements East 401, or 67.88 % 



Movements East 152, or 24.40 % ! Movements AVest 158, or 26.74% 



Movements up 15, or 2.41% 



Movements N. to S 11, or 1.77% 



Movements S. to N 9, or 1.44% 



Movements up 14, or 2.38% 



Movements N. to S. .... . 9, or 1.51% 



Movements S. to N 9, or 1.51% 



It might be added, finally, that the heads were rarely observed (in reference to 

 nutation) unless at least a few of the florets were in anthesis, and the observations 

 were continued in most cases until the last of the florets were in full bloom. 



It is likely that nutation is more marked in the head previous ta anthesis, but 

 this question was not regarded. 



The tabulation needs no explanation, except to say that the uppermost head is 

 given in the first column, after the date and time of day, that the outermost head 

 of successive branches passing downward are numbered in serial order, and that 

 second or third heads, etc., on the branches, are indicated by added numerals in 

 smaller type. 



