POISONOUS METALS ON SPRAYED FRUITS AND VEGETABLES. 
29 
Table 12. — Copper 7 lead, and arsenic remaining on sprayed grapes at picking time — 
Continued. 
pie 
No. 
Spray material used. 
4-3-50 Bordeaux 
(sprayed with me- 
dium set nozzle). 
2§ lbs. lead arsenate 
(powder), 2 lbs. laun- 
dry soap, 3-3-50 Bor- 
deaux (overs prayed 
with trailer, coarse 
nozzle). 
2J lbs. lead arsenate 
(powder), 1 lb. resin 
soap, 3-3-50 Bor- 
deaux (oversprayed 
with trailer, coarse 
nozzle). 9 
26020 s ! 4-3-50 Bordeaux 
(sprayed -with me- 
dium set nozzle). 
2\ lbs. lead arsenate 
(powder), 2 lbs. laun- 
dry soap. 3-3-50 Bor- 
deaux (sprayed with 
trailer, medium noz- 
zle). 9 
260218 4-3-50 Bordeaux 
(sprayed with me- 
dium' set nozzle). 
2 \ lbs. lead arsenate 
(powder), 2 lbs. laun- 
dry soap, 3-3-50 Bor- 
deaux (sprayed with 
trailer, medium noz- 
zle). 
2J lbs. lead arsenate 
(powder), 1 lb. resin 
soap, 2-3-50 Bor- 
deaux. 9 
3-3-50 Bordeaux (set 
nozzle). 
\\ lbs. lead arsenate 
(powder), 1 lb. resin 
fish-oil soap, 2-3-50 
Bordeaux (trailer, 
medium nozzle) 
^schedule recommend- 
ed for this region)." 
Date 
sprayed. 
1916. 
June 15. 
June 28. 
Aug. 4. 
June 15. 
Arsenic 
(As). 
Condition 
of samples 
analyzed. I Orig- 
inal 
fruit. 
Dried 
fruit. 
Lead 
(Pb) CoPP" ; 
{rt)) - | (Cu). 
Orig- 
inal 
fruit. 
Loss 
on 
; ; j on 
fruit, i^, fruit. 
Unwashed. ! 4.00 
Washed K. J 1.00 
Unwashed. 2.80 
Washed 3...' 1.00 
I 
(set 
June 28, July 
12. ' 
June 15. 
June 28, July; 
12. 
Aug. 2. 
1917. 
June 18. 
Julv2-4,24- 
25. 
16.30 
4.10 
Parts per million. 
Unwashed . 
Washed 3... 
June 18-20. 
July 2-4, 24- 
25, Aug. 14 
June 18-20. 
July 2-4. 
July 24-25. 
4.60 
2.70 
Unwashed . 3. 20 
Washed io.. 1.30 
Unwashed 
Washed 1C1 
Unwashed . 
Washed w. . 
12.70 
50 
21.10 
12.40 
16.00 
6.50 
35.50 
18.00 
51.3 
19. 
6.2 
3.2 
13.3 
6.4 
17.6 
11.3 
6. 20 30. 10 i 15. 5 
3.30 16.00 8.6 
ss. 
56.5 
75.2 
41.7 
4.2 
2.6 
3.7 
2.8 
21.0 
13.0 
18.0 
13.6 
80.0 
79.4 
288828 3-3-50 Bordeaux 
nozzle), 
1£ lbs. lead arsenate 
(powder), 1 lb. resin 
fish-oil soap. 2-3-50 
Bordeaux (trailer 
medium nozzle). 11 
3-3-50 Bordeaux (set 
nozzle) 
1£ lbs. lead arsenate 
(powder), 1 lb. resin 
fish-oil soap, 2-3-50 
Bordeaux (sprayed 
with trailer, medium 
nozzle) 
2£ lbs. lead arsenate 
(powder), 1 lb. resin 
fish-oil soap, 2-3-50 
Bordeaux (sprayed 
with trailer, medium 
nozzle). 11 
3 Samples washed in running tap water. 
8 Catawba. 
9 Harvested Oct. 13, 1916, Sandusky, Ohio. 
10 Samples washed by soaking the grapes in water for 5 minutes, pouring off tne water, and then washing 
,in running tap water. 
11 Harvested Oct. 27, 1917, Sandusky, Ohio. 
28.2 
14.6 
61.0 
29.4 
40.5 
18.5 
4.4 
2.0 
3.1 
1.7 
18.0 
8.1 
2.7 
2.0 
14.1 
7.7 
21.1 
P.ct. 
75.4 
78.0 
13.5 
10.0 
78.2 
