652 
Journal of Agricultural Research 
Vol. XXVIII, No. 7 
custom for storing this commodity is to pile the sacks but 5 or 6 deep. The 
floor was of wood. Coffee was stored on the floor below. 
After fumigation, samples were taken from sacks 1 to 21, located in a pile of 
sacks, as indicated in figure 1, o. This pile of sacks consisted of five tiers, of 
which the sampled sacks formed the central tier. The lot was piled directly 
against the brick wall, there being spaces of about 2 feet on either side of the 
pile, extending from aisle to wall and separating the pile of five tiers of sacks 
from neighboring tiers. This pile of sacks was chosen for sampling because it 
was as well surrounded by other piles as were any, and the central tier was 
chosen because it represented the tier most inaccessible to the gas. It will be 
noted that the sacks were stacked 14 sacks deep in this pile, and an interlocking 
system of piling used. To obtain the samples the two outer tiers of sacks were 
removed and the probe thrust through the indicated sacks, the ends of which 
were thus exposed. The results of the examination of the six samples from each 
of the 21 sacks are given in Table I. 
Table I.— Data on the penetration of hydrocyanic-acid gas into 240-pound sacks 
of chick-peas infested hy Bruchus quadrimaculatus and arranged as shown in 
figure l y a. All bruchids reached and killed by the fumigant 
Sack No. 
Sample No. 
Number of seeds examined 
Number of seeds infested 
Number of— 
Total larvae, pupae, and 
adults 
Eggs unaccounted for 
i 
Eggs 
Emergence holes 
Larvae 
8 
a 
a 
Adults 
One-eighth 
One-fourth 
One-half 
Full-grown 
1 
60 
47 
321 
14 
39 
19 
17 
70 
17 
19 
181 
126 
2 
50 
45 
167 
1 
31 
8 
16 
30 
3 
10 
98 
156 
3 
50 
12 
43 
0 
43 
4 
50 
26 
19 
3 
i 
1 
0 
5 
3 
8 
18 
5 
50 
26 
57 
3 
13 
2 
4 
4 
2 
3 
28 
26 
6 
50 
21 
150 
2 
13 
3 
4 
5 
2 
0 
27 
121 
300 
177 
757 
23 
97 
33 
41 
114 
27 
40 
352 
472 
1 
50 
48 
140 
19 
2 
6 
10 
36 
5 
46 
105 
16 
2 
50 
18 
43 
1 
5 
4 
6 
9 
1 
8 
33 
9 
3 
50 
9 
22 
6 
3 
0 
1 
1 
2 
2 
9 
7 
4 
50 
15 
20 
3 
3 
3 
0 
0 
0 
1 
7 
10 
5 
50 
22 
27 
1 
5 
4 
1 
8 
1 
2 
21 
5 
6 
50 
40 
117 
3 
42 
22 
0 
9 
3 
0 
76 
38 
300 
152 
369 
33 
60 
39 
18 
63 
12 
59 
251 
85 
1 
50 
43 
185 
18 
13 
5 
8 
21 
15 
25 
87 
80 
2 
50 
14 
20 
1 
1 
0 
1 
1 
3 
2 
8 
12 
3 
50 
7 
13 
1 
1 
0 
1 
1 
1 
3 
7 
5 
4 
50 
8 
12 
1 
2 
0 
1 
2 
1 
3 
9 
2 
5 
50 
10 
15 
4 
0 
1 
2 
3 
1 
5 
12 
6 
50 
19 
26 
0 
6 
4 
3 
0 
3 
0 
16 
10 
300 
101 
271 
25 
23 
10 
16 
28 
24 
38 
139 
109 
1 
50 
38 
60 
3 
2 
8 
8 
15 
6 
0 
39 
18 
2 
m 
26 
38 
5 
3 
0 
5 
3 
7 
1 
19 
14 
3 
50 
12 
14 
1 
6 
0 
0 
0 
2 
0 
8 
5 
4 
50 
14 
20 
0 
4 
1 
2 
2 
3 
0 
12 
8 
5 
50 
8 
8 
0 
3 
1 
1 
3 
2 
0 
10 
6 
50 
14 
17 
0 
3 
5 
1 
3 
5 
0 
17 
0 
300 
112 
157 
9 
21 
15 
17 
26 
25 
1 
105 
45 
1 
50 
47 
238 
42 
6 
5 
9 
14 
27 
69 
130 
66 
2 
50 
10 
9 
5 
3 
0 
0 
1 
0 
4 
8 
3 
50 
9 
9 
0 
1 
0 
2 
0 
1 
1 
5 
4 
4 
50 
7 
4 
11 
2 
1 
2 
4 
0 
0 
9 
5 
50 
10 
5 
10 
2 
2 
3 
2 
1 
0 
10 
6 
50 
12 
6 
20 
3 
2 
3 
6 
1 
2 
17 
300 
95 
271 
88 
17 
10 
19 
27 
30 
76 
179 
70 
