354 
[NOVEMBER 
The bracts for the two years combined present no less than seven 
empirical modes, showing without question that 1415 heads is still 
too few for material having so wide a range and so high standard 
deviation. In the rays, the range being less and the standard devia- 
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Fic. 11.—Summation curve for bracts 1900 + 1903 and the bract-curves for ¥§ 
and 1903 superposed for comparison; all reduced to the same area, se cove 
line the surimation curve; dotted line the rg00 curve; dot and dash line the 19°3 
7M. 
CONSTANTS OF DISK-FLORETS FOR 1900, 1903, AND THEIR SU 
30 
55 
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