432 
F. D. HEALD AND R. A. STUDHALTER 
The Results from the Traps at West Chester 
From November 26, 1912 to March 19, 1913, there were 19 rain 
periods with precipitation varying from o.oi to 1.8 inches, and maxi- 
mum temperatures from 37° to 64° F. during the days of the rain, 
with no expulsion of ascospores (Table I). The first expulsion of 
Table I 
Ascospore Trap Tests, Records for West Chester ^ Pa., Winter and Spring, IQ12-IJ 
Rainfall 
Temperature 
Percentage of 
Date 
Traps Showing 
Amount Inches 
Max 
Min 
Expulsion 
Nov. 28 
O.OI 
38 
30 
Dec. 2 
0.36 
56 
38 
0 
" 4-6 
0.5 
68 
36 
traces 
" II 
0.03 
43 
37 
0 
" 17-18 
0.2 
46 
30 
0 
" 19 
0.89 
53 
33 
0 
" 24 
9.5 (snow) 
34 
25 
0 
" 27 
1.02 
37 
32 
0 
" 30 
1.8 
46 
36 
0 
Jan. 3 
. 0.93 
58 
37 
0 
4 
0.1 (snow) 
39 
27 
0 
" 7-8 
0.78 
60 
36 
0 
" 10 
0.13 
40 
22 
0 
" 1 1 -12 
0.24 
59 
32 
0 
" 15-16 
0.81 
46 
26 
0 
" 17-18 
0.31 
57 
33 
0 
" 20 
0.24 
54 
33 
0 
" 23-27 
0.88 
57 
28 
0 
Feb. 12 
0.15 
35 
15 
0 
22 
0.07 
58 
45 
0 
" 27 
0.78 
60 
38 
0 
Mar. 10 
0.53 
49 
38 
0 
" 13-15 
1-375 
64 
29 
0 
" 20 
1.64 
63 
49 
47 
ascospores for the season of 191 3 occurred on March 20 following a 
rainfall of 1.64 inches and expulsion continued through the following 
months, but was checked by unfavorable temperatures early in 
November (Table II). From November 16, 1913 to May 4, 1914, 
there were 18 rain periods with precipitation varying from o.io to 
1.95 inches and maximum temperatures from 34°-68° F. during the 
days of the rain, and no expulsion of spores. The first expulsion of 
ascospores for the season of 1914 occurred on May 5, following a 
rain of 0.71 inches (Table III). It may be noted that the first ex- 
pulsion for 1914 was about six weeks later than in the spring of 1913. 
The records were continued to the end of July, 1914 (Table IV), 
when there was a forced discontinuance of the work. 
