1904] SHULL—PLACE-CONSTANTS FOR ASTER 363 
TABLE K, 
PRECIPITATION IN CENTIMETERS. 
CEDARVILLE, O. | Currton, O. 
1900 1903 Ii-yr. normal] | 1900 1903 
Mies... ...... 6.45 10.41 10.14 Bi 98 
+ a =.57 8.79 5.87 4.83 8.51 
Meeet...,.....| 7.70 9.07 8.71 5.00 11.58 
an 6.20 8.20 8.18 ae II.94 
july terete s ce... 9.32 4.11 9.63 13.05 3-95 
oe 10.29 175 5-54 04 -79 
vm ees... <.| 2.08 2.46 5-74 eee 
ee ees 5.92 4.67 5:77 
Se ee ee 
TABLE L. if 
LIGHT-INTENSITY AT CINCINNATI, OHIO. 
12-yr. normal 
1900 | 1903 
Se 
aah Se a eee 49% 36% 45% 
2 68 42 
May... 73 12 es 
ley ; 71 62 72 
Reeve 
August = < : 
Octobe =: - . 
- No study has been made to determine the period of differentiation 
mn Aster prenanthoides, but I am assured by Dr. C. J. CHAMBERLAIN, 
who has studied A ster Novae-A ngliae, that some of the heads in that 
Species are already blocked out by the first of July. I consider it a 
o: aaa that the period of differentiation of the parts of the 
ai this species lies between June 1 and August 1. ; 
_ “€ accept the normal climatic conditions as near the harmonic 
ties; (and this May not be a very erroneous assumption, since the 
in question is near the center of range), we find that the conditions 
“a more favorable in 1900 (a) with respect to June and July Lease 
ably ay the temperature for these months in 1903 being ae 
half the W normal, (6) in July precipitation, 1903 having less a 
*ormal precipitation for that month, and (c) in light-intensity 
ets month, except possibly May, up to August 1, after which 
°F could have any further influence. It may well be a question, 
Were 
