Jul. 149, Bureau of Chemistry, U. S. Oept. of Agriculture. 



PLATE VI. 



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

 (3) sodium nitrate; (4) sodium nitrate + aluminum hydrate; (5) sodium hydrate; (6) 

 sodium hydrate + aluminum hydrate. 



Fig. b. Crop grown 5 days in (1) distilled water; (2) sodium nitrate; (3) potassium chlorid; 

 (4) potassium sulphate; (5) potassium nitrate. 



