48 BULLETIN 1027, U. S. DEPARTMENT OF AGEICULTURE. 



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). 



Product. 



Peaches: 

 Sprayed . 



Unsprayed. 



Cherries: 

 Sprayed . 



Unsprayed . . 

 Plums: 

 Sprayed 



Unsprayed . - 



Tomatoes: 

 Sprayed . . 



Determi- 

 nations 

 made on. 



Unsprayed . 



Celery: 



Sprayed 



Unsprayed . 

 Cucumbers: 

 Sprayed 



Unsprayed . 



Cranberries: 

 Sprayed . . . 



Unsprayed 

 Grapes: 

 Sprayed . . . 



Unsprayed 

 Pears: 

 Sprayed . . . 



Unsprayed . 

 Apples: 

 Sprayed 



Unsprayed. 



Whole. 

 Pulp... 



Skin..., 

 Whole. 

 Pulp... 

 Skin.... 



Who'e... 

 Whole 1 - 

 Who'.e... 



Whole... 

 Who'e 1 . 

 Whole. . . 

 Whole 1 . 



Whole... 

 Pulp.... 

 Who'e... 

 Pulp.... 



Leaves.. 

 Stalks... 

 Leaves i. 

 Stalks 1.. 

 Whole... 



Whole. 

 Pulp... 

 Skin... 

 Whole. 

 Pulp... 

 Skin.... 



Who'e 



Whole 1 . . . 

 Whole 



Whole... 



Whole 1 . 

 Whole... 



Whole.. 

 Pulp... 

 Skin.... 

 Calyx.. 

 Skin 2.. 

 Calyx 2. 

 Whole.. 



Whole 



Pulp 



Skin 



Calyx 



Stem ends... 



Skin 2 



Calyx 2 



Stem ends 2 . 

 Whole 



Arsenic (As). 



^l}^ \ Dry basis. 



basis. 



Lead (Pb). 



O^igmall ^^^^^ 



Copper (Cu). 



Original 1 p. , . 



Parts per viilUon. 



0.02- 

 .00- 

 .04- 

 .00- 

 .00- 

 .00- 



0.94 

 .14 



4.50 

 .23 

 .10 



.77 



. 04- . 35 



. 02- . 17 



. 02- . 08 



. 03- . 13 



. 02- . 10 



. 03- . 10 



. 02- . 0' 



.07- 

 .02- 

 .02- 

 .02- 



.30 

 .05 

 .07 

 .02 



0.10- 3.90 



. 09- 1. 50 



.01- .10 



.05- 7.10 



. 02- 4. 40 



.00- .07 



0.10- 

 .00- 

 .20- 

 .00- 

 .00- 

 .00- 



.20- 

 .10- 

 .16- 



.20- 

 .20- 

 .20- 

 .10- 



1.10- 

 .30- 

 .40- 

 .40- 



8.01 

 I.2I 

 35. 4 

 2.0 

 .9 

 6.1 



2.3 

 1.1 



.6 



.8 

 .6 

 .0 

 .4 



0.3- 

 .1- 



.7- 

 .0- 

 .0- 

 .0- 



.6- 

 .4- 

 .6- 



.2- 

 .2- 

 .3- 

 .2- 



2.6 



.8 



12.2 



.6 



.4 



1.7 



1.3 

 1.3 



.7 



.5 

 .5 

 .4 

 .3 



0. SO- 30. 7 

 .70- 11.8 

 .08- 



.10- 



.:02- 

 "-.30- 

 1.20- 



.30- 

 1.20- 



.05- 



.32 



.10 

 1.00 

 0.40 



.90 

 6.40 



.10 



.03- 5.50 

 . 02- . 40 

 . 10- 25. 70 

 . 70-127. 00 

 . 40-328. 00 

 . 10- 22. 70 

 . 70- 83. 00 

 .40- 76.00 

 . 04- . 44 



. 20- 

 .10- 

 .00- 



.50- 

 .10- 

 1.20- 

 4. 80- 

 1.20- 

 4.80- 

 . 30- 



35.5 

 24.0 

 ■ .4 



2.1 



.8 

 4.3 

 27.7 

 4.0 

 27.7 

 .(i 



. 20- 40. 



. 10- 2. 5 



. 50- 130. 



3.50- 760.0 



2. 70-2, 000. 



. 50- 92. 3 



3.50- 470.0 



2. 70- 600. 



. 2 - 2. 2 



.5- 1.7 



.2- 1.2 



.3- .9 



.2- .6 



2.0- 

 .7- 



4.4- 

 .0- 

 .0- 

 .0- 



0. 6- 19. 1 

 .6- 12.4 



.4- .7 



.5- 17.6 

 .3- 12.0 

 .5- 1. 1 



.3- 1.0 

 .2- .2 

 .8- 3.2 



4.2- 21.3 

 .8- 3.0 



4.2- 21.3 

 .2- .3 



.3- 17.0 

 .2- 1.8 

 .7- 80.0 

 2. 2-328. 

 2. 8-550. 

 . 5- 63. 



1. 6- 

 1.0- 

 :3. 1- 



16. 7- 

 3.1- 



l(i. 7- 

 1.0- 



23.0 

 5.6 



96.1 

 4.0 

 2.8 



11.9 



2. 8- 8. 1 



1.9- 8.1 

 2. 8- 5. 3 



1. 6- 3. 1 



1.5- 2.9 



2. 2- 2. 3 

 1.4- 1 



7. 6- 29. 8 



3. 3- 21. 1 

 6. 0- 16. 1 

 4.0- 10.7 



4. 9- 150. 4 



4.9- 97.7 



2.9- 5.6 



2. 5- 88. 



1. 5- 65. 6 



2. 6- (i. 8 



6.7 

 1.7 

 13.7 

 92.2 

 13.4 

 92.2 

 1.5 



2. 2- 130. 

 1.3- 15.0 



3. 3- 480. 

 11.6-2,000.0 

 17. 7-4, 400. 



2.4- 256.1 

 2. 2-297. Oj 11.6-1,700.0 

 2. 8-252. 0| 17.7-1.500.01 



.2- 1.51 1.3- 9.3I 



2.0- 3.2 



1.2- 1.8: 



.5- 1.4 



.8- 5.7 



.5- 2. 2 



.6- 1.8 



.5- 1.2 



4. 7-258. 1 

 .9- 16.6 



2. 1- 85. 5 

 .7- 8. 2 



2.3- . 



1.2- 1.4 

 .3- .3 



2.5- 2.8 

 .6- .... 

 .3- .... 

 .5- .... 



1. 3- .33. 3 

 1.0- 16.2 



.6- 1.0 



.6- 6.4 

 .3- 4.2 

 .4- .9 



1.5- 



.7- 

 4.5- 

 12.1- 

 2.1- 

 7.8- 



■3- 



.4- 

 .3- 



.6- 

 2.5- 

 2.7- 



.(■.- 

 2.5- 

 2.7- 21.2 



.3- .7 



11.9- 

 7.9- 

 4.0- 



2.4- 

 2.4- 

 3.4- 

 3.0- 



14.3- 



9.4- 

 10.5- 



8.8- 



15.2 

 10.6 

 8.3 



6.8 

 5.1 

 3.7 

 3.4 



91.9 

 35.5 

 30.0 

 20.0 



33. 6-2, 150. 8 

 11.5- 207.5 

 15.0- 712.5 

 8. 7- 102. 5 

 24.2- 



25.5- 



28.6 



'6.8- 



7.3 



38.5- 



44.4 



11.3- 





7.1- 





7.7- 





10.0- 268.5 



7. 8- 130. 6 

 4. 8- 7. 4 



2. 9- 33. 8 

 1.4- 22.2 

 2.1- 4.7 



3.0. 10.0- 



1.0 4.9- 



16. 2' 19.3- 



21.9 52.4- 



12.4! 9.0- 



8.2 25.8- 



.9 1.7- 



5.2 



.8 

 28.5 

 29.5 

 29.4 

 28.5 

 14.7 



2.4- 

 1.8- 

 2.8- 

 12.4- 

 15.3- 

 2.8- 

 12.4- 

 15.3- 

 2..3- 



14.5 

 5.1 

 54.5 

 68. 9 

 41.8 

 ;«.8 

 4.5 



24.2 

 4.2 

 111.3 

 149.0 

 136.1 

 111.3 

 74.2 

 98.1 

 4.3 



