374 BOTANICAL GAZETTE [MAY 
In this collection the range became somewhat wider than in the 
second, but all other elements decreased continuously. The mode 
came near to class 16, and the point of inflection of the curve came 
iad 300 
100. \ 
aonn 
Ry, RE 
ae 
a 
= 
— 
w 
AN. 
ee 
25 ’ 
a : cadeaaeaidiiel 
150 400- 
100 q 
/ : 00: 
1 12 13 14 
10 17 ao a 23 44 6 7288? 
Fics. 1-4 
nearer to the origin than in the two foregoing collections. The 
variates falling on the mode 17 increased to 18.28 per cent, and the 
positive skewness became only 0.134 (fig. 3). : 
On comparing the above three collections, it can be seen easily 
that the constants of variation decrease continuously from the begin- 
