24 BULLETIN 1027, U. S. DEPARTMENT OF AGEICULTXJRE. 



Table 8. — Arsenic, lead, and copper remaining on sprayed tomatoes at picking time. 



Sam- 

 ple 

 No. 



Spray material 

 used. 



Date 

 sprayed. 



Determina- 

 tions 

 made on. 



Arsenic 

 (As). 



Origi- 

 nal 

 fruit. 



Dried 



fruit. 



Lead (Pb). 



Origi- 

 nal 

 fruit. 



Dried 



fruit. 



Copper 



(Cu). 



Origi- 

 nal 

 fruit. 



Dried 

 fruit. 



Loss 

 on 

 dry- 

 ing. 



23304 I 



23305 I 



23306 1 



25664 5 



25665 2 



2.5825 s 

 25826 3 



25706 4 



25707 4 

 25710 4 

 25711 < 



Check (unsprayed) 



8-9-50 Bordeaux mix- 

 ture. 



5-6-50 Bordeaux. 



Check (unsprayed) 



July 8, 19, 

 21,31, Aug. 

 5, 11, 18, 

 Sept. 11. 



.Tulv 8, 19, 

 20, 31, Aug. 

 5, 10, IS, 

 Sept. 4,11. 



1916. 



Whole fruit. 



Pulp 



Whole fruit, 

 Pulp 



Whole fruit 

 Pulp 



Bordeaux, 1| lbs. 

 arsenate (pow- 



5-5-50 



lead 



der). 

 Check (unsprayed) 



5-5-50 



load 



der) 

 5-5-50 

 4-4-50 



July 13. Aug, 

 7, 25, Sept. 



8. 



Whole fruit 



Pulp 



Whole fruit. 

 Pulp.... 



Bordeaux, IJlbs. 

 arsenate (pow- 



B ordeaux 



Bordeaux. . . 



July 13, Aug, 

 7, 25, Sept. 

 8. 



Sept. IS. 



Whole fruit. 



Pulp 



Whole fruit. 

 Pulp 



0.02 

 .02 

 .3 

 .05 



.07 

 .02 

 .07 

 .02 



Check (imsprayed). 

 Check (imsprayed). 

 4-4-50 Bordeaux. . . 



Whole fruit. 



Pulp 



Whole fruit. 



Pulp 



Whole fruit. 



Pulp 



Whole fruit. 

 Pulp 



Parts per million. 



0.4 

 .4 



5.2 

 .9 



1.4 

 .4 



1.1 

 .3 



0.9 



.6 



1.7 



1.2 



16.1 

 10.7 

 29.8 

 21.1 



6.0 

 4.0 

 7.6 

 3.3 



1.8 

 1.2 

 5.7 

 2.2 



5.7 

 1.6 



1.0 

 .6 



.7 



.7 



4.0 



30.0 

 20.0 

 91.9 

 35.5 



91.9 



25.8 



10.7 

 8.9 

 17.5 

 10.5 



14.0 

 14.0 

 60.6 

 13.6 



17.0 

 9.4 

 10.5 

 8.8 

 13.2 

 13.2 

 14.3 

 12.5 



P.ct. 

 94.0 

 94.0 

 93.8 

 93.8 



93. S 

 93.8 



94.4 

 94.4 

 94.3 

 94.3 



95.0 

 95.0 

 93.4 

 93.4 



94.7 

 94.7 

 94.3 

 94.3 

 94.7 

 94.7 

 94.4 

 94.4 



1 Fruit picked Sept. 15, 1915, Camden. N. J. 



2 Fruit picked Sept. 14, 1916 Arlington, Va. 

 s Fruit picked Oct. 2, 1916, Arlington, Va. 



< Fruit picked Sept. 15, 1916, Salem, N. J.; samples represent commercial fruit ready for market. 



Table 9. — Copper remaining on sprayed celery at gathering timej 



Sam- 

 ple 

 No. 



Spray material used. 



Date 

 sprayed. 



Determinations 

 made on. 



Copper (Cu). 



Original 

 celery. 



Dried 



celery. 



lyoss on 

 drying. 



23585 2 



23586 2 



23587 2 



28783 ■■ 



28784 5 



Check plat (unsprayed) 



Oversprayed with 5-5-50 



Bordeaux mixture, 2 lbs. 



resin fish-oil soap. 



5-5-50 Bordeaux mixture, 

 2 lbs. resin flsh-oil soap. 



Commercially sprayed with 

 5-5-50 B ordeaux plus soap . 



Oversprayed with 5-5-50 

 Bordeaux plus soap. 



Aug. 14, 24, 

 Sept. 2, 14. 



Aug. 14, 24, 

 Sept. 2, 14. 



1917. 

 Sept. 11, 22, 

 Oct. 1. 



Sept. 11, 22, 

 Oct. 1. 



Unwashed (check) 

 Unwashed leaves s 

 Unwashed stalks ■''. 

 Washed leaves '• . . . 

 Washed stalks*. . . 

 Unwashed leaves ' 

 Unwashed stalks ^. 

 Washed leaves ■!... 

 Washed stalks <. . . 



Unwashed leaves.. 

 Unwashed stalks. . 

 Washed leaves «... 

 Washed stalks s. .. 

 Unwashed leaves.. 

 Unwashed stalks. . 

 Washed leaves 6. . . 

 Washed stalks^. . . 



Parts pe 



2.3 



258.1 



16.6 



65.7 



8.2 



213.0 



3.6 



85.5 



4.7 



2.9 



.9 



12. S 



1.6 



2.1 



.7 



million. 



24.2 



2, 15o! 8 



207.5 



547.5 



102.5 



1,775.0 



45.0 



712.5 



36.3 



33.6 

 11.5 

 20.7 

 11.5 

 91.4 

 20.0 

 15.0 

 8.7 



■ cent. 

 90.5 

 88.0 

 92.0 

 88.0 

 92.0 

 88.0 

 92.0 

 88. 

 92.0 



86.0 

 92.2 



86.0 

 92.0 



1 The samples sprayed in 1915 were coated with copper spray when received and represent extremely 

 heavy applications; the 1917 samples represent celery as it usually appears on the market. 



2 Ilarvested Oct. 29, 1915, North Liberty, Ind. 



' These sprayed samples were heavily coated with the spray material wheu received. 



< Washmg done by holding sample under faucet water for few minutes. 



5 Harvested about Nov. 1, 1917, North Liberty, Ind. 



« Washed by soaking celery in water for a short time and then rubbing with a small brush. 



