24 BULLETIN 1027, U. S. DEPARTMENT OF AGRICULTURE. 
Table 8. — Arsenic, lead, and copper remaining on sprayed tomatoes at picking time. 
Sam- 
Spray material 
used. 
Date 
sprayed. 
Determina- 
tions 
made on. 
Arsenic 
(As). 
Lead (Pb). 
Copper 
(Cu). 
Loss 
ple 
No. 
Origi- 
nal 
fruit. 
Dried 
fruit. 
Origi- 
nal 
fruit. 
Dr H°uaf 
fruit -p! 
Dried 
fruit, 
dry- 
ing. 
23304 i 
1915. 
Whole fruit. 
Pulp 
Pa 
rts per 
mUlior 
1.8 
1.2 
5.7 
2.2 
5.7 
1.6 
.6 
.5 
1.0 
.6 
.7 
.7 
4.0 
.9 
.9 
. 5 
.6 
.5 
.7 
.7 
.8 
.7 
30.0 
20.0 
91.9 
35. 5 
91.9 
25.8 
10.7 
8.9 
17.5 
10.5 
14.0 
14.0 
60.6 
13.6 
17.0 
9.4 
10.5 
8.8 
13.2 
13.2 
14.3 
12.5 
P.ct. 
94 
8-9-50 Bordeaux mix- 
ture. 
5-6-50 Bordeaux 
July 8, 19, 
21, 31, Aug. 
5, 11, 18, 
Sept, 11. 
Julv 8, 19, 
20^31, Aug. 
5, 10, 18, 
Sept. 4, 11. 
1916. 
94 
23305 » 
Whole fruit. 
Pulp 
93 8 
93 8 
23306 " 
Whole fruit. 
Pulp 
93 8 
93 8 
25664 2 
Whole fruit. 
Pulp 
Whole fruit. 
Pulp 
Whole fruit. 
Pulp 
Whole fruit. 
Pulp 
Whole fruit. 
Pulp 
0.02 
.02 
.3 
.05 
.07 
.02 
.07 
.02 
0.4 
.4 
5.2 
.9 
1.4 
.4 
1.1 
.3 
0.9 
.6 
1.7 
1.2 
.3 
.2 
.5 
.2 
16.1 
10.7 
29.8 
21.1 
6.0 
4.0 
7.6 
3.3 
94 4 
25665 2 
25825 3 
25826 3 
25706 * 
5-5-50 Bordeaux, 1| lbs. 
lead arsenate (pow- 
der). 
Check (unsprayed) 
5-5-50 Bordeaux, It lbs. 
load arsenate (pow- 
der). 
5-5-50 B ordeaux 
4-4-50 Bordeaux 
Jub- 13. Aug. 
7, 25. Sept. 
8'. 
July 13, Aug. 
7, 25, Sept. 
8. 
Sept. 18. 
94.4 
94.3 
94.3 
95.0 
95.0 
93.4 
93.4 
94.7 
94 7 
25707 * 
Whole fruit. 
Pulp 
94.3 
94.3 
25710 * 
Whole fruit. 
Pulp 
94 7 
4-4-50 Bordeaux 
94.7 
25711 < 
Whole fruit. 
94.4 
Pulp i 
94.4 
> Fruit picked Sept, 15, 1915, Camden, N. J. 
2 Fruit picked Sept. 14, 1916 Arlington, Va. 
J Fruit picked Oct. 2, 1916, Arlington, Va. 
* Fruit, picked Sept. 15, 1916, Salem, N. J.; samples represent commercial fruit ready for market. 
Table 9. — Copper remaining on sprayed celery at gathering time. 1 
Coppe 
r (Cu). 
Sam- 
Spray material used. 
Date 
sprayed. 
Determinations 
made on. 
Loss on 
drying. 
ple 
No. 
Original 
Dried 
celerv. 
celery. 
1915. 
Parts pt 
' million. 
Per cent. 
23585 2 
Check plat (unsprayed) 
Unwashed (check) . . 
2.3 
24.2 
90.5 
23586 2 
Oversprayed with 5-5-50 
Aug. 14, 24, 
Unwashed leaves 3 . . 
258. 1 
2, 150. S 
88.0 
Bordeaux mixture, 2 lbs. 
Sept. 2, 14. 
Unwashed stalks 3 . . . 
16.6 
207.5 
92.0 
resin fish-oil soap. 
Washed leaves* 
65.7 
547.5 
88.0 
Washed stalks < 
8.2 
102.5 
92.0 
23587 2 
5-5-50 Bordeaux mixture, 
Aug. 14, 24, 
Unwashed leaves 3 . . 
213.0 
1,775.0 
88.0 
2 lbs. resin fish-oil soap. 
Sept. 2, 14. 
Unwashed stalks 3 . . . 
3.6 
45.0 
92.0 
Washed leaves < 
85.5 
712.5 
88.0 
Washed stalks * 
2.9 
36.3 
92.0 
1917. 
28783 s 
Commercially sprayed with 
Sept. 11, 22, 
Unwashed leaves 
4.7 
33.6 
86.0 
5-5-50 Bordeaux plus soap. 
Oct. 1. 
Unwashed stalks 
Washed leaves 6 
Washed stalks 6 
.9 
2.9 
.9 
11.5 
20.7 
11.5 
92.2 
28784 5 
Oversprayed with 5-5-50 
Sept. 11, 22, 
Unwashed leaves 
12.8 
91.4 
86.0 
Bordeaux plus soap. 
Oct. 1. 
Unwashed stalks 
Washed leaves 6 
1.6 
2.1 
20.0 
15.0 
92.0 
Washed stalks 6 
.7 
8.7 
1 The samples sprayed in 1915 were coated with copper spray when received and represent extremely 
heavy applications; the 1917 samples represent celery as it usuailv appears on the market, 
2 Harvested Oct. 29, 1915, North Liberty, Ind. 
3 These sprayed samples were heavily coated with the spray material when received. 
* Washing done by holding sample under faucet water for few minutes. 
5 Harvested about Nov. 1, 1917, North Liberty, Ind. 
6 Washed by soaking celery in water for a short time and then rubbing with a small brush. 
