No. 422.] QUANTITATIVE STUDY OF VARIATION 123 



































































































I 
30 B i 
- 
T 
- 
25 d 
| 
E ] 
x & ] 
20| | | E] | 
am | 
ae | 
FE 3 
eL EEI 
[i | 
1T | 
B q 
10 11 IL TT Li 
i] IL 11 L1 
HI 
HT I 
HT | 
5 ITI gi 
1T [i 
IH {| 
IT] l! 
30 m 50 G0 
31 ly 5! 6i 
Fic. 7. — Aster nove-anglie L. Ray curve of 199 heads. Premi — Mean = 42.874371 = 
.301616 ; modes = 37, 43, 47, 51 















































































20 LT PTT titi 
E Bate S 
EI E 
Li E 
l 
‘5 2 
Ed IH: 
10 ae | 
T TT HT 
5| T ! 
ail 
ai 
EN i 
y t) 3) 70 
gl rt 61 7 BI 
Fic. 8. — Aster nove-anglie L. Disk curve of 199 heads. a (€ Mean = 62.452261 + 
.445352 ; modes = 51, 60, 63, 79; € = 9-314270 + -3149 
