ARSENICALS. 
45 
Table 21. — Relation of arsenic rendered soluble by insects to toxicity of arsenicals, 1919 
and 1920. 
Arsenicals. 
Total 
number 
of 
insects 
ana- 
lyzed. 
Percentag 
e of arsenic. 
Mi 
•Si 
co 3 
m 
•Sol 
*li 
3 2 " 
QQ 
Soluble in bodies 
of— 
Made soluble by ; 
of— 
uices 
6 
<D 
1 
CQ 
to 
r^2 
3 
V 
d 
CO 
<o 
CD 
§ 
co 
1 
| 
i 
o 
CD 
M 
a 
<3 
> 
< 
8 
© 
1 
to 
J 
g 
© 
® 
> 
< 
39 
Commercial acid lead arse- 
8 
8 
8 
7 
8 
6 
9 
7 
9 
6 
6 
10 
7 
9 
310 
353 
405 
320 
360 
336 
423 
321 
546 
293 
292 
570 
331 
515 
17.3 
7.2 
35.7 
5.2 
30.5 
2.4 
15.9 
11.0 
37.9 
33.2 
6.0 
6.2 
100.0 
100.0 
44.5 
28.8 
78.6 
64.8 
69.4 
41.8 
98.3 
91.8 
80.3 
84.3 
58.4 
74.6 
88.4 
73.4 
46.0 
37.7 
60.6 
33.9 
30.3 
39.1 
44.3 
37.4 
59.9 
48.4 
63.8 
59.2 
70.9 
54.4 
83.5 
63.5 
84.7 
20.0 
64.0 
22.6 
71.0 
61.2 
98.7 
95.1 
73.9 
58.8 
89.6 
89.7 
58.0 
43.3 
74.6 
39.6 
54.6 
34.5 
71.2 
63.5 
79.6 
75.9 
65.4 
64.2 
83.0 
72.5 
27.2 
21.6 
42.9 
59.6 
38.9 
39.4 
82.4 
80.8 
42.4 
51.1 
52.4 
68.4 
28.7 
30.5 
24.9 
28.7 
.0 
36.7 
28.4 
26.4 
22.0 
15.2 
57.8 
53.0 
66.2 
56.3 
49.0 
14.8 
33.5 
20.2 
55.1 
50.2 
60.8 
61.9 
67.9 
52.6 
40.7 
28 
Commercial basic lead arse- 
nate 
36 1 
57 
Commercial calcium arse- 
38.9 
27 
71 
45 
Commercial white arsenic . . . 
Laboratory barium arsenate. 
Laboratory calcium meta- 
34.4 
24.1 
32.1 
64 
64C 
62 
Commercial Paris green 
Sample 64 plus lime ( 2 grams) 
Commercial magnesium 
55.3 
52.5 
41.7 
90 
23 
74 
Commercial London purple. 
Commercial zinc arsenite . . . 
Laboratory copper barium 
42.7 
59.4 
58.0 
in 
?■> 
Laboratory sodium arsenate. 
39 
28 
57 
27 
71 
45 
64 
64C 
62 
90 
23 
74 
10 
25 
Arsenicals. 
Commercial acid lead arsenate 
Commercial basic lead arsenate 
Commercial calcium arsenate 
Commercial white arsenic 
Laboratory barium arsenate 
Laboratory calcium meta-arsenate. 
Commercial Paris green 
Sample 64 plus lime (2 grams) 
Commercial magnesium arsenate. . . 
Commercial London purple 
Commercial zinc arsenite 
Laboratory copper barium arsenate 
Pure arsenic oxid 
Laboratory sodium arsenate 
4 
78.5 
61.7 
65.5 
69.5 
51.0 
17.5 
79.5 
66.7 
71.0 
73.7 
77.5 
66.0 
78.5 
82.4 
C3 p, 
,2§ 
c3 
Per ct. 
0.61 
1.73 
.20 
38.00 
.68 
.04 
3.52 
3.52 
4.64 
5.30 
1.25 
6.27 
100.00 
100.00 
Average amount of arsenic per 
insect analyzed. 
Mg. 
0.0223 
.0142 
.0099 
.0091 
.0105 
.0120 
.0087 
.0075 
.0120 
.0068 
.0132 
.0058 
.0165 
.0180 
Mg. 
0. 1212 
.0803 
.1245 
.0914 
.0694 
.0676 
.1203 
.1157 
.1460 
.1315 
.1430 
.0675 
.1130 
Mg. 
0.0126 
.0158 
.0189 
.0285 
.0138 
.0110 
.0143 
.0276 
.0173 
.0305 
.0220 
.0177 
.0600 
Mg. 
0. 0520 
.0368 
.0511 
.0430 
.0312 
.0302 
.0478 
.0503 
.0584 
.0563 
.0594 
.0303 
.0632 
.0439 
SB 
6.0 
6.0 
6.0 
6.0 
5.8 
5.9 
5.9 
5.8 
6.0 
5.8 
6.0 
6.0 
5.9 
5.9 
The following deductions are made from the results shown in 
Table 21: 
(a) Samples 45, 27, 23, 74, and 28 are very stable in water (slightly 
soluble as compared with control results) ; samples 64C, 64, and 39 
are moderately stable in water; samples 71, 90, 57, and 62 are 
unstable in water; and samples 10 and 25 are totally water soluble. 
