Bui. 149, Bureau of Chemistry, U. S. Dept. of Agriculture. 



PLATE V. 



Fig. a. Crop grown 5 days in (1) distilled water; (2) distilled water + aluminum hydrate; 

 (3) potassium chlorid; (4) potassium chlorid + aluminum hydrate; (5) hydrochloric acid; 

 (6) hydrochloric acid + aluminum hydrate. 



Fig. b. Crop grown 5 days in (1) distilled water; (2) distilled water + aluminum hydrate; 

 (3) potassium sulphate; (4) potassium sulphate + aluminum hydrate; (5) sulphuricacid. 



