444 
F. D. HEALD AND R. A. STUDHALTER 
was a gradual increase from the beginning of expulsion in March to a 
maximum in August, followed by a more sudden, though steady, 
decrease until November (Fig. 4). The maximum at Martic Forge 
(98.8 percent) was also much higher than that at West Chester (67.3 
Table XI 
Record of Expulsion from Typical Young and Mature Pustules at Martic Forge for 
the Active Season, iqij 
Trap Numbers and No. of Active Ostioles 
Date 
Amount, 
Inches 
Young Pustules 
Mature 
Pustules 
21 
23 
37 
40 
17 
28 
43 
Mar. 15 
.92 
0 
0 
0 
0 
0 
0 
6 
0 
.62 
0 
0 
0 
10 
" 26—27 
0 
N 
14 
0 
N 
28 
Anr T. 
.10 
0 
0 
0 
0 
" 5 
.23 
0 
0 
0 
27 
0 
I 
0 
0 
" T/l 
I 78 
l./O 
0 
N 
P 
P 
31 
N 
27 
" 16 
T I ^ 
0 
0 
0 
0 
" 28 
2 
N 
N 
19 
N 
N 
TOO 
N 
May 15 
.11 
0 
0 
I 
0 
0 
0 
0 
0 
" 16-17 
•74 
25 
N 
N 
N 
N 
N 
N 
N 
" 21 
.27 
0 
0 
I 
14 
16 
21 
N 
" 29-30 
.69 
N 
N 
64 
N 
N 
N 
N 
II 
June 19-21 
•34 
P 
P 
0 
95 
N 
N 
7 
" 23 
.26 
N 
N 
6 
N 
N 
N 
N 
N 
" 27 
•37 
N 
13 
N 
N 
N 
N 
N 
N 
July 2 and 5 . . . 
1.97 
100 
58 
100 
N 
N 
N 
N 
73 
" 9 
•59 
N 
N 
100 
N 
70 
50 
N 
50 
" 17 and 20. . 
•13 
18 
4 
I 
5 
2 
41 
6 
2 
Aug. I 
2.68 
N 
N 
47 
N 
48 
P 
P 
54 
6 
1-37 
N 
32 
38 
36 
22 
18 
8 
65 
" 10 
I-I3 
35 
N 
N 
40 
26 
24 
18 
27 
" 22 . . 
•17 
22 
66 
4 
33 
34 
22 
II 
21 
" 29 
•30 
N 
43 
4 
49 
37 
27 
15 
20 
Sept. 7 
.67 
N 
N 
29 
37 
10 
5 
24 
N 
12 
.09 
N 
18 
5 
19 
4 
P 
P 
5 
" 17-18 
.19 
N 
N 
3 
27 
23 
P 
7 
P 
" 20-21 
2.37 
N 
N 
N 
N 
17 
P 
5 
33 
" 30-Oct. 2. . 
1.63 
N 
N 
N 
N 
14 
6 
P 
34 
Oct. II 
.67 
N 
N 
N 
N 
17 
5 
II 
26 
" 19 
1.05 
N 
N 
N 
26 
13 
27 
3 
5 
" 20 
•15 
0 
0 
0 
0 
0 
0 
0 
0 
" 25-26 
1.04 
N 
N 
N 
N 
15 
2 
9 
8 
Nov. 8-9 
.91 
N 
65 
N 
N 
19 
0 
10 
8 
" 15-16 
•83 
0 
0 
0 
0 
0 
0 
0 
0 
N = numerous. 
percent). It is difficult to explain this seasonal difference except to 
suppose that it might have been due to the difference already men- 
tioned in the condition of the pustules. 
