ACTION OF LEAD ARSENATE ON FOLIAGE. 35 



Experiment 14. A few leaves had fallen, but the injury was less marked than in 

 Experiment 12. 

 Experiment 15. Practically the same as Experiment 14. 



Plate II, fig. 1, shows the appearance of leaves on June 4, injured 

 by lead arsenate. These were selected from trees in Experiment 3 

 as representative. Figure 2 shows some of the most severely injured 

 leaves taken from Experiment 12. 



NOTES MADE ON JUNE 9. 



Apple trees showed no injury. The notes on the peach trees were 

 as follows : 



Experiment 1. Considerable injury to foliage; a great maaiy leaves had fallen, as 

 evidenced by the thin appearance of the foliage and the number of leaves on the 

 ground. 



Experiment 2. Injury very evident, but not so severe as in Experiment 1. A few 

 leaves had fallen. 



Experiment 3. Many leaves with "shot holes," but as a whole the injury appeared 

 to be slightly less than in Experiment 1. 



Experiment 4. Practically the same as Experiment 2, except that a few more leaves 

 had fallen. 



Experiment 5. A little "shot holing" of leaves, but none had fallen. As a whole 

 the trees looked healthy and in good condition. 



Experiment 6. No injury noticeable. 



Experiment 7. Foliage in good condition; fine green color; no injury. 



Experiment 8. No injury. 



Experiment 9. In jury slight; a few "shot holes;" no fallen leaves. 



Experiment 10. Same as Experiment 9. 



Experiment 11. Some injury; many leaves with numerous "shot holes," but few 

 had fallen. 



Experiment 12. Quite severely injured. Many fallen leaves and foliage noticeably 

 thin on tree. Many leaves were yellow and had numerous "shot holes." 



Experiment 13. Considerable injury, but not so severe as in Experiment 12. Not 

 many yellow leaves. 



Experiment 14. Practically the same as Experiment 12. 



Experiment 15. Same as Experiment 13. 



NOTES MADE ON JULY 29 ON CONDITION OF FRUIT. 



Apple foliage uninjured; no fruit. Notes on the peach trees were 

 as follows: 



Experiment 1 . Fruit nearing maturity, very much redder in color than that on trees 

 not sprayed with arsenicals. Many peaches, approximately 40 per cent, showed the 

 injurious effect of spraying by having a brown or black shriveled spot usually around 

 or near the stem end or on the upper side. In some cases the injury showed on the 

 small end, when the fruit was hanging down, presumably a drop of the liquid having 

 collected there and concentrated. 



Experiment 2. Same as Experiment 1; injury not so severe. 



