POISONOUS METALS OX SPRAYED FRUITS AXD VEGETABLES. 23 
Table 7. — Arsenic, lead, and copper remaining on sprayed plums at picking time. 
Sam- 
ple j Spray material used. 
25640 1 
2.5642 i 
25643 
25644 1 
25646 
25307: 
25810 ' 
Date 
sprayed. 
2 lbs. lead arsenate 
(paste), 50 galls, water 
1 lb. com. spray con- 
taining 1.7 per cent 
copper. 5 per cent 
lead arsenate. 7 per 
cent calcium arsenate. 
2 per cent sulphur, 50 
galls, "water. 
2 lbs. lead arsenate 
(paste ), 50 galls, water. 
5 lbs. sulphur. 50 galls. 
water. 
2 lbs. lead arsenate 
(paste), 50 galls.water. 
i lbs. barium polysul- J 
phid, 50 galls, water. 
2 lbs. lead arsenate | 
(paste). 50 galls.water. 
1 lb. sodium polysul- 
phid, 50 galls, water. 
2 lbs. lead arsenate 
(paste), 50 galls, water. 
Self-boiled lime-sul- 
phur (S-S-50). 
2 lbs. lead arsenate 
f paste', 50 galls, water. 
Self-boiled liine-sulphur 
(8-8-50). 2 lbs. soap... 
Check (unsprayed) 
1916. 
Mar 26. 
June22.Au§ 
1,2. 
May 26. 
June 22. Aug 
1.2. 
May 26. 
June 22, Aug 
1,2. 
May 26. 
June 22, Aug 
1,2. 
May 26. 
June 22, Aug 
1,2. 
May 26. 
June 22, Aug. 
1.2. 
Condition 
of fruit 
analysed. 
2 lbs. lead arsenate Mav 27. 
(paste), plus lime, 50 | 
galls, water, 
li galls, lime-sulphur j June 21.22,23 
"solution, 50 galls, wa- 
ter. 2 lbs. lead arse- 
nate (paste). 
li galls, lime-sulphur | Aug. 12. 
solution, 50 galls. 
water. 
2 lbs. lead arsenate j May 27. 
(paste), 50 galls.water, 
plus lime. 
Self-boiled lime-sulphur ! June 21, 22, 23 
(8-8-50), 2 lbs. lead j 
arsenate (paste), 50 
galls, water. 
Self-boiled lime-sulphur i Aug. 12. 
(8-8-50). 
2 lbs. lead arsenate | May 27. 
(paste), plus lime, 50 
galls, water. 
Bordeaux 3-1-50, 2 lbs. : June 21, 22, 23 
lead arsenate (paste). 
Bordeaux 3-4-50 Aug. 12. 
Che?k (unsprayed) 
Arsenic 
(As). 
Lead(Pb,.' C ( PP, er 
Orig- 
inal 
fruit. 
Dried 
fruit. 
inal 
fruit. 
Dried 
fruit. 
Orig- 
inal 
fruit. 
Dried 
fruit. 
Unwashed . 
Washed *. . . 
Unwashed . 
Washed'... 
Unwashed . 
Washed ' 
Unwashed 
Washed '.. 
Unwashed . 
Washed 2... 
Unwashed 
Washed 2 .. 
Unwashed . 
Washed 1 ... 
Unwashed . i 
Washed' 
Unwashed . 
Washed 2 ... 
Unwashed 
Washed'.. 
Unwashed . 
Washed '. . . 
0.06 
.06 
P 
0.5 
.5 
arts pei 
0.2 
.2 
.04 
.03 
.3 
.2 
.4 
.2 
.03 
.03 
.2 
.2 
.2 
.2 
.04 
.04 
.3 
.3 
.2 
.2 
.03 
.02 
.2 
.2 
.3 
.2 
.03 
.03 
.3 
.3 
.2 
.2 
.03 
.02 
.13 
.07 
.2 
.1 
.8 
.4 
.3 
.2 
.5 
.5 
.07 
.07 
.4 
.4 
.3 
.3 
.13 
.10 
.7 
.6 
.4 
14 
.10 
.07 
.6 
.4 
.4 
.3 
1.6 0.3 
1.6 
1.6 
1.6 
2.4 
1.8 
2.2 
1.4 
2.9 
2.9 
2.3 
2.3 
2.3 
1.7 
3.7 
3.0 
Loss 
on 
dry- 
ing. 
P.ct. 
87.4 
87.0 
87.2 
S7.7 
87.6 
82.3 
82. 3 
> 
i BurbanV; picked last of August, Hart, Mich. 
'Washed by holding under running tap water for a few minutes. 
* Golden Domesti?a: picked last of September. Hart, Mich. 
