SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 107, NO. 17, PL. 7 



1. Inhibitory Effect of Wood as influenced by Distance 

 FROM Seed 



A, cdiitrol; B, C, cultured in single jar in presence of wood. Seeds at right- 

 hand end of C were closest, and those at left-hand end of B were farthest from 

 the wood. Photographed 4 days alter iilanting. 



2. Inhibition by Hydrogen Peroxide Vapor 



A, control: B, cultured in jar containing dish of 20-percent H2O- solution; C, 

 cultured in jar containing dish of 50-percent H-Oi solution; D, cultured in jar 

 containing dish of 90-percent H-O2 solution. Note greater inhibition and bleach- 

 ing of seeds at right-hand ends of wicks, which were closest to H2O- solutions. 

 Photographed 4 days after planting. 



