48 
BULLETIN 1027, U. S. DEPARTMENT OF AGRICULTURE. 
Several spray schedules are represented by the samples shown in 
Table 14. Very little spray residue was present on the apples, except 
Samples 23598, 33378, and 33379, which were purposely heavily 
sprayed, and the apples from Grand Junction, Colo. The 1915 sam- 
ples from Grand Junction showed so much more residue than the 
apples from other districts that the spraying schedule was changed 
in 1916 and 1917, with the result that much less spray residue was 
found on the fruit. 
Table 15. — Arsenic, lead, and copper remaining on fruits and vegetables sprayed with 
poisonous sprays (summary). 
Arsenic (As). 
Lead (Pb). 
Copper (Cu) 
Determi- 
nations 
Product. 
made on. 
°S al ^basi, 
Original 
basis. 
Dry basis. 
Original 
basis. 
Dry basis. 
Peaches: 
Parts per million. 
Sprayed 
Whole 
Pulp 
0.02- 0.94 
.00- .14 
0.10- 
.00- 
8.0 
1.2 
0.3- 2.6 
.1- .8 
2.0- 
.7- 
23.0 
5.6 
Skin 
.04- 4.50 
. 00- . 23 
.20- 
.00- 
35.4 
2.0 
.7- 12.2 
.0- .6 
4.4- 
.0- 
96.1 
4.0 
Unspraved... 
Whole 
Pulp 
. 00- . 10 
.00- 
.9 
.0- .4 
.0- 
2.8 
Skin 
. 00- . 77 
.00- 
6.1 
.0- 1.7 
.0- 
11.9 
Cherries: 
Sprayed 
Whole - 
. 04- . 35 
.20- 
2.3 
. 6- 1. 3 
2.8- 
8.1 
2.0- 3.2 
11.9- 
15.2 
Whole i 
. 02- . 17 
.10- 
1.1 
.4- 1.3 
1.9- 
8.1 
1.2- 1.8 
7.9- 
10.6 
Unsprayed . . 
Whole 
. 02- . 08 
.16- 
.6 
.6- .7 
2.8- 
5.3 
.5- 1.4 
4.0- 
8.3 
Plums: 
Spraved 
Whole 
. 03- . 13 
.20- 
.8 
.2- .5 
1.6- 
3.1 
.3- 1.2 
2.4- 
6.8 
Who'e* 
. 02- . 10 
.20- 
.6 
.2- .5 
1.5- 
2.9 
.3- .9 
2.4- 
5.1 
UnspraA'ed. . 
Whole 
. 03- . 10 
.20- 
.6 
.3- .4 
2.2- 
2.3 
. 5- . 6 
3.4- 
3.7 
Whole i 
. 02- . 07 
.10- 
.4 
.2- .3 
1.4- 
1.7 
. 4- . 
3.0- 
3.4 
Tomatoes: 
Spraved 
Whole 
. 07- . 30 
1.10- 
5.2 
.5- 1.7 
7.6- 
29.8 
.8- 5.7 
14.3- 
91.9 
Pulp 
. 02- . 05 
.30- 
.9 
.2- 1.2 
3.3- 
21.1 
.5- 2.2 
9.4- 
35.5 
Unspraved . . 
Who : e 
. 02- . 07 
.40- 
1.4 
.3- .9 
0.0- 
16.1 
.6- 1.8 
10.5- 
30-0 
Pulp 
. 02- . 02 
.40- 
.4 
.2- .6 
4.0- 
10.7 
.5- 1.2 
8.8- 
20.0 
Celery: 
Sprayed 
4. 7-258. 1 
.9- 16.6 
2. 1- 85. 5 
.7- 8.2 
2.3- .... 
33. 6-2 
11.5- 
15.0- 
8.7- 
24.2- 
, 150. 8 
Stalks 
207.5 
712.5 
Stalks i 
102.5 
Unspraved . . 
Whole 
Cucumbers: 
Sprayed 
Whole 
1.2- 1.4 
25.5- 
28.6 
Pulp 
.3- .3 
6.8- 
7.3 
Skin 
2.5- 2.8 
.6- 
38. 5- 
11.3- 
44.4 
Unsprayed . . 
Pulp. 
.3- .... 
7.1- 
Skin 
.5- .... 
7.7- 
Cranberries: 
Sprayed 
Who'e 
0.10- 3.90 
0.80- 
30.7 
0. 6- 19. 1 
4.9- 
150.4 
1.3- 33.3 
10. 6- 
268. 5 
Whole i 
. 09- 1. 50 
.70- 
11.8 
.6- 12.4 
4.9- 
97.7 
1.0- 16.2 
7.8- 
130. 6 
Unspraved . . 
Whole.... 
.01- .10 
.08- 
. / 
.4- .7 
2.9- 
5.6 
.6- 1.0 
4.8- 
7.4 
Grapes: 
Spraved 
Whole 
.05- 7.10 
. 26- 
35.5 
.5- 17.6 
2.5- 
88.0 
.6- 6.4 
2.9- 
33.8 
Whole i 
.02- 4.40 
.10- 
24.0 
.3- 12.0 
1.5- 
65.6 
.3- 4.2 
1.4- 
22.2 
Unsprayed . . 
Pears: 
Sprayed 
Whole 
. 00- . 07 
.00- 
.4 
.5- 1.1 
2.6- 
6.8 
.4- .9 
2.1- 
4.7 
Whole 
. 10- . 32 
.50- 
2.1 
.3- 1.0 
1. 6- 
6.7 
1.5- 3.0 
10.0- 
14.5 
Pulp 
. 02- . 10 
.10- 
.8 
.2- .2 
1.0- 
1.7 
.7- 1.0 
4.9- 
5.1 
Skin 
.30- 1.00 
1.20- 6.40 
1.20- 
4.80- 
4.3 
27.7 
.8- 3.2 
4.2- 21.3 
3.1- 
16.7- 
13.7 
92.2 
4.5- 16.2 
19.3- 
54.5 
Calyx 
12. 1- 21. 9 52. 4- 
68.9 
Skin 2 
. 30- . 90 
1.20- 
4.0 
.8- 3.0 
3.1- 
13.4 
2.1- 12.4 
9.0- 
41.8 
Calyx 2 
1.20- 6.40 
4.80- 
27.7 
4. 2- 21. 3 
16. 7- 
92.2 
7.8- 8.2 
25.8- 
33. 8 
Unsprayed . . 
Whole 
. 05- . 10 
.30- 
.6 
.2- .3 
1.0- 
1.5 
.3- .9 
1.7- 
4.5 
Apples: 
Spraved 
Whole 
.03- 5.50 
.20- 
40.0 
.3- 17.0 
2.2- 
130.0 
.4- 5.2 
2.4- 
24.2 
Pulp 
. 02- . 40 
.10- 
2.5 
.2- 1.8 
1.3- 
15.0 
.3- .8 
1.8- 
4.2 
Skin 
. 10- 25. 70 
. 70-127. 00 
.50- 
3.50- 
130.0 
760.0 
.7- 80.0 
2. 2-328. 
3.3- 480.0 
11.6-2,000.0 
.6- 28.5 
2. 5- 29. 5 
2.8- 
12.4- 
111.3 
Calyx 
149.0 
Stem ends. . . 
. 40-328. 00 
2. 70-2, 000. 
2. 8-550. 
17. 7-4, 400. 
2. 7- 29. 4 
15. 3- 
136.1 
Skin 2 
. 10- 22. 70 
.50- 
92.3 
. 5- 63. 
2.4- 
256. 1 
. 6- 28. 5 
2.8- 
111.3 
Calyx 2 
. 70- 83. 00 
3.50- 
470.0 
2. 2-297. 
11.6-1,700.0 
2. 5- 14. 7 
12.4- 
74.2 
Stem ends 2 . 
. 40- 76. 00 
2.70- 
600. 
2. 8-252. 
17.7-1,500.0 
2.7- 21.2 
15.3- 
98.1 
Unsprayed . . 
Whole 
. 04- . 44 
.2 - 
2.2 
.2- 1.5 
1.3- 
9.3 
.3- .7 
2.3- 
4.3 
