Bui. 108, U. S. Dept of Agriculture. 
Plate II 
Fig. 1.— Effect of Salicylic Aldehyde on Corn in Nutrient Solutions. 
(1) Control in nutrient solution: (2) same plus salicylic aldehyde 10 parts per million; (3) 
25 parts per million; (4) 50 parts per million; (5) 100 parts per million; (6) 200 parts per 
million. 
Fig. 2.— Effect of Salicylic Aldehyde on Cowpeas in Nutrient Solution. 
(1) Nutrient solution; (2) same with 10 parts per million salicylic aldehyde; (3) 25 parts per 
million; (4) 50 parts per million; (5) 100 parts per million; (6) 200 parts per million. 
