Bui. 108, U. S. Dept. of Agriculture. 



Plate III. 



Fig. 1.— Effect of Salicylic Aldehyde on Cabbage Seedlings in Nutrient 



Solutions. 



(1) Nutrient solution; (2) same plus 10 parts per million salicylic aldehyde; (3) 25 parts 

 per million; (4) 50 parts per million. 



Fig. 2.— Effect of Salicylic Aldehyde on Wheat in Soil. 



(1) Clay soil; (2) same plus salicylic aldehyde 10 parts per million; (3) 25 parts per million; 

 (4) 50 parts per million; (5) 100 parts per million. 



