10 
September 17, a similar study of twenty-one successive plants was 
made in another portion of the same field. (See Table III). 
Table III. 
Plants. 
Worms. 
G„o<,b„llJ B J-»-X. 
Loss by 
other 
causes. 
Total. 
1 
2 
3 . 
1 
1 
o 

2 

1 


2 
1 




3 





33 
23 
CO 
30 
41 
65 
11 
29 
53 
53 
24 
63 
21 
19 
23 
88 
22 
36 
14 
20 
49 
4. 
1 
3 
3 
3 
3 
1 
1 
3 
5 
5 
G 

8 
9 
13 
4 



G 
1 
2 
1 
8 

4 
1 
1 
1 
14 
25 
5 
3 
12 
30 
5 
2 

11 
39 
50 
25 
65 
34 
52 
68 
16 
31 
57 
59 
43 
94 
29 
30 
44 
131 
31 
38 
14 
31 
94 
1,036 
4 
5 
6... 
7 
8 
9 
10 
11 
12 
13 
14. 
15 
16 
17 
18 
19 
20 
21 
Total. 
13 
780 
78 
178 
Table I should not be included in the table of percentages, since its 
data were obtained early in the season, before the Boll Worm had really 
become well established in cotton. Omitting table I we have the fol- 
lowing table : 
Table IV. 
Percentages from Tables II and III. 
Table. 
Good bolls. 
Loss by 
Boll Worm. 
Loss 
by other 
causes. 
Total 
loss. 
II 
Per cent. 
.690 
. 753 
Per cent. 
.092 
.075 
Per cent. 
.218 
.172 
i 
Percent. 
.310 
.247 
Ill 
Average . 
.7215 
.0835 
.195 
. 2785 
The four preceding studies were made by a count of what was actu- 
ally found on the plants at the time of observation. September 18 only 
bolls and forms which had fallen were collected and examined. The 
result is given below : 
Number bored by Boll Worm 1G7 
Number shed from other causes 3(52 
Total 529 
Taking the average of the total loss found in the same field on the 
two preceding days, and tabulated as Tables II and III, and again in 
Table IV, these 529 bolls maybe considered as equivalent to the count- 
