655 
May 17,1924 Hydrocyanic-Add Gas in Protection of Chick-Peas 
WAREHOUSE No. 2 
The 30,000 sacks of chick-peas stored in this two-story brick warehouse were 
stacked on both floors, each floor measuring 150 by 50 by 10 feet, with wooden 
floors, and with large sliding doors on the ground floor opening on the street on 
either side of the warehouse. Both floors were fumigated as a single unit. TJie 
sacks were stacked from 8 to 10 deep. The sacks sampled were on the ground 
floor and located as indicated in figure 1, 6, being well toward the rear of the 
warehouse between a side aisle and a brick wall, the tier A being 15 rows or 
tiers from the street wall. Sacks 1 to 6 were in tier B; sacks 7 to 10 in tier C; 
sacks 11 to 18 in tier A. Tiers of sacks on either side of a block A-B-C, and a 
portion of the sacks of tier A were removed to make possible the taking of samples. 
While this warehouse was well constructed, considerable leakage of gas took 
place through the paper pasted over the iron gratings above the doors. It is 
believed by the writers that sacks 11 to 18 stacked against the rear brick wall 
were located in as difficult a position as any from the standpoint of gas penetra¬ 
tion. The results of the examination of the samples taken in warehouse No. 2 
are recorded in Table II. 
Table II.— Data on the penetration of hydrocyanic-acid gas into 240-pound sacks 
of chick-peas infested by Bruchus quadrimaculatus and arranged as shown in 
figure 1, b. 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 
Eggs 
Emergence holes 
Larvae 
SB 
Qi 
P 
Adults 
One-eighth 
One-fourth 
l 
One-half 
Full-grown 
1. 
1 
50 
49 
308 
38 
3 
5 
14 
9 
16 
17 
64 
206 
2 
50 
42 
191 
3 
4 
7 
5 
9 
31 
28 
84 
104 
3 
50 
27 
67 
5 
13 
1 
5 
9 
8 
2 
38 
24 
4 
50 
20 
26 
0 
1 
1 
1 
1 
0 
0 
4 
22 
5 
50 
9 
11 
0 
0 
0 
0 
0 
0 
0 
0 
11 
6 
50 
4 
6 
0 
2 
0 
0 
0 
0 
0 
2 
4 
300 
151 
609 
46 
23 
14 
25 
28 
55 
47 
192 
371 
2.. 
1 
50 
48 
243 
2 
22 
12 
5 
5 
3 
10 
57 
184 
2 
50 
46 
353 
7 
2 
0 
4 
17 
4 
28 
55 
291 
3 
50 
48 
328 
4 
31 
0 
16 
13 
21 
31 
112 
212 
4 
50 
49 
327 
4 
7 
3 
16 
7 
27 
15 
75 
248 
5 
50 
49 
444 
5 
173 
66 
20 
25 
17 
5 
306 
133 
6 
50 
23 
44 
0 
5 
1 
5 
9 
3 
5 
28 
16 
300 
263 
1,739 
22 
240 
82 
66 
76 
75 
94 
633 
1,084 
5 .. 
1 
50 
50 
282 
16 
38 
3 
15 
19 
29 
2 
106 
160 
2 
50 
41 
104 
3 
101 
3 
50 
16 
28 
0 
9 
3 
3 
1 
14 
0 
30 
4 
50 
5 
5 
0 
2 
2 
1 
0 
0 
0 
5 
6 
5 
50 
2 
2 
0 
0 
2 
0 
0 
0 
0 
2 
0 
6 
50 
10 
13 
0 
4 
0 
2 
1 
1 
0 
8 
5 
300 
124 
434 
19 
53 
10 
21 
21 
44 
2 
151 
266 
1.. 
1 
50 
42 
124 
2 
17 
3 
6 
30 
10 
6 
72 
50 
2 
50 
40 
104 
4 
13 
11 
10 
24 
2 
6 
66 
34 
3 
50 
36 
76 
2 
74 
4 
50 
39 
82 
1 
19 
2 
4 
1 
2 
6 
34 
47 
5 
50 
30 
49 
4 
16 
1 
0 
2 
2 
2 
23 
22 
0 
50 
25 
38 
1 
10 
1 
1 
0 
1 
1 
14 
23 
300 
212 
473 
14 
75 
18 
21 
67 
17 
21 
209 
250 
1 
50 
6 
5 
0 
1 
0 
0 
1 
1 
1 
4 
1 
2 
50 
1 
3 
0 
0 
0 
0 
1 
1 
0 
2 
1 
3 
50 
2 
3 
0 
0 
0 
0 
0 
0 
0 
0 
3 
4 
50 
3 
3 
0 
0 
0 
0 
0 
1 
0 
1 
2 
5 
50 
25 
49 
0 
4 
' 2 
4 
5 
2 
1 
18 
31 
6 
50 
37 
89 
4 
24 
6 
1 
5 
11 
4 
51 
34 
300 
74 
152 
4 
29 
8 
5 
12 
16 
6 
76 
72 
