SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 107, NO. 17, PL. 4 



CONTROL 



2| 





^. 



41 



51 



Inhibition by Emanations from Vegetable Oils 



Oat seeds planted on blotters in open dishes were cultured in closed i -liter 

 cans containing- cardboard panels coated with various oils: i, "Kellin" ; 2, 

 "Kellsoy" ; 3, safflower oil ; 4, soybean oil ; 5, "Dorscolene" ; 6, linseed oil ; 7, 

 castor oil. Photographed 4 days after planting. 



