POISONOUS METALS ON SPRAYED FRUITS AND VEGETABLES. 23 

 Table 7. — Arsenic, lead, and copper remaining on sprayed plums at picking time. 



Spray material used. 



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 

 centcalcium 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. 

 4 lbs. barium polysul- 



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 (8-8-50). 



2 lbs. lead arsenate 

 (paste), 50 galls, water. 



Self-boiled lime-sulphur 

 (8-8-50), 2 lbs. soap... 



Check (unsprayed) 



2 lbs. lead arsenate 

 (paste), plus lime, 50 

 galls, water. 



li galls, lime-sulphur 

 "solution, 50 galls, wa- 

 ter, 2 lbs. lead arse- 

 nate (paste). 



11 galls, lime-sulphur 

 'solution, 50 galls, 

 water. 



2 lbs. lead arsenate 

 (paste), 50 galls.water, 

 plus lime. 



Self-boiled lime-sulphur 

 (8-8-50), 2 lbs. lead 

 arsenate (paste), 50 

 galls, water. 



Self-boiled lime-sulphur 

 (8-8-50). 



2 lbs. lead arsenate 

 (paste), plus lime, 50 

 galls, water. 



Bordeaux 3-4-50, 2 lbs. 

 lead arsenate (paste). 



Bordeaux 3-4-50 



Che?l<" (unsprayed) 



Date 

 sprayed. 



1916. 

 May 26. 



June 22, Aug, 

 1,2. 



May 26. 



June 22, 



1, 2. 

 May 26. 



June 22, 



1,2. 

 May 26 . 



.Tune 22, 



1,2. 

 May 26. 



June 22, 



1,2. 

 May 25 



June 22, 

 1,2. 



Aug 



Aug 



Aug 



Aug. 



Aug. 



May 27. 

 June 21,22,23 



Aug. 12. 

 May 27. 

 June21,22,23 



Aug. 12. 



May 27. 



June 21, 22, 23 

 Aug. 12. 



Condition 



of fruit 

 analysed. 



Unwashed . 

 Washed K . 



Unwashed 

 Washed'-. 



Unwashed 

 Washed ». . 



Unwashed 

 Washed'.. 



Unwashed 

 Washed 2.. 



Unwashed 

 Washed'.. 



Unwashed . 

 Washed'... 

 Unwashed . 

 Washed'... 



Unwashed . 

 Washed "... 



Unwashed . 

 Washed'... 



Unwashed 

 Washed '. . 



Arsenic 



(As). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Lead (Pb). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Copper 



(Cu). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit 



0.06 

 .06 



P 



0.5 

 .5 



arts per 



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 2.4 

 1.6 .3 2.4 



3.1 

 1.5 



2.4 

 1.6 



1.7 

 1.7 



2.2 

 1.4 

 2.9 

 2.9 



1.7 

 1.7 



2.3 

 2.3 



2.3 

 1.7 



0.5 

 .4 



1.2 

 .9 



3.7 

 3.0 



5.1 



3.4 

 3.4 



Loss 

 on 

 dry- 

 ing. 



P.ct. 



87.4 



87.2 



1 BurbanV; pi?Ved last of August, Hart, Mich. 



'Washed by holding under running tap water for a few minutes. 



» Golden Domestical picVed last of September, Hart, Mich. 



