POISONOUS METALS ON SPEAYED FRUITS AND VEGETABLES. 29 



Table 12. — Copper, lead, and arsenic remaining on sprayed grapes at picking time — 



Continued. 



Spray material used. 



Date 

 sprayed. 



Condition 

 of samples 

 analyzed. 



Arsenic 



(As). 



Lead (Pb). 



Copper 



(Cu). 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Orig- 

 inal 

 fruit. 



Dried 



fruit. 



Orig- 

 inal 

 fruit. 



Dried 

 fruit. 



Loss 

 on 

 dry- 

 ing. 



1916. 

 June 15. 



Unwashed . 

 Washed 3... 



Parts per mitlion. 

 4.00 16.30 12.6 51.3 4.4 

 1.00 4.10 4.9 19.9 2.0 



.Tune 28. 



Aug. 4. 



June 15. 



June 28, July 

 12. 



June 15. 



June 28, July 

 12. 



Aug. 2. 



1917. 

 June 18. 



July 2-4, 24- 

 25. 



June 18-20. 



July 2-4, 24- 

 25, Aug. 14. 



June 18-20. 

 July 2-4. 



July 24-25. 



Unwashed 

 Washed 3.. 



Unwashed 

 Washed 3... 



Unwashed . 

 Washed lo 



Unwashed 

 Washed i" 



Unwashed 

 Washed i". 



2.80 

 1.00 



4.60 

 2.70 



3.20 

 1.30 



7.10 

 3.60 



6.20 

 3.30 



12.70 

 4.50 



21.10 

 12.40 



16.00 

 6.50 



35.50 

 18.00 



30.10 

 16.00 



6.2 

 3.2 



13.3 



6.4 



8.1 

 3.7 



17.6 

 11.3 



15.5 



8.6 



28.2 

 14.6 



61.0 

 29.4 



40.5 

 18.5 



88.0 

 56.5 



75.2 

 41.7 



3.1 

 1.7 



4.6 

 1.8 



18.0 

 8.1 



14.1 

 7.7 



21.1 

 8.3 



2.7 

 2.0 



4.2 

 2.6 



3.7 



2.8 



P.ct. 

 75.4 



78.0' 



4-3-50 Bordeaux 

 (sprayed wth me- 

 dium set nozzle). 



2J lbs. lead arsenate 

 (powder), 2 lbs. laun- 

 dry soap. 3-3-50 Bor- 

 deaux (overs prayed 

 with trailer, coarse 

 nozzle). 



2^ lbs. lead arsenate 

 (powder), 1 lb. resin 

 soap, 3-3-50 Bor- 

 deaux (overs prayed 

 with trailer, coarse 

 nozzle)." 



4-3-50 ■ Bordeaux 

 (sprayed with me- 

 dium set nozzle). 



2 J lbs. lead arsenate 

 (powder), 2 lbs. laun- 

 dry soap, 3-3-50 Bor- 

 deaux (sprayed with 

 trailer, medium noz- 

 zle).9 



4-3-50 Bordeaux 

 (sprayed with me- 

 dium set nozzle). 



2J lbs. lead arsenate 

 (powder), 2 lbs. laun- 

 dry soap, 3-3-50 Bor- 

 deaux (sprayed with 

 trailer, medium noz- 

 zle). 



2^ lbs. lead arsenate 

 (powder), 1 lb. resin 

 soap, 2-3-50 Bor- 

 deaux.9 



3-3-50 Bordeaux (set 

 nozzle). 



IJ lbs. lead, arsenate 

 (powder), 1 lb. resin 

 fish-oil soap, 2-3-50 

 Bordeaux (trailer, 

 medi um nozzle) 

 (schedule recommend- 

 ed for this region)." 



3-3-50 Bordeaux (set 



nozzle). 

 IJ lbs. lead arsenate 



(powder), 1 lb. resin 



fish-oil soap, 2-3-50 



Bordeaux (trailer, 



medium nozzle)." 

 3-3-50 Bordeaux (set 



nozzle). 

 IJ lbs. lead arsenate 



(powder), 1 lb. resin 



flsh-oil' soap, 2-3-50 



Bordeaux (sprayed 



with trailer, medium 



nozzle). 

 2 J lbs. lead arsenate 



(powder), 1 lb. resin 



fish-oil soap, 2-3-50 



Bordeaux (sprayed 



with trailer, medium 



nozzle). u 



3 Samples washed in running tap water. 



8 Catawba . 



9 Harvested Oct. 13, 1916, Sandusky, Ohio. 



1" Samples washed by soaking the grapes in water for 5 minutes, pouring ofl tne water, and then washing 

 in running tap water, 

 u Harvested Oct. 27, 1917, Sandusky, Ohio. 



13.5 

 10.0 



21.0 

 13.0 



18.0 

 13.6 



79.4 



