SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 107, NO. 17, PL. 3 



Influence of Seed Substrate on Inhibition by Emanation 

 FROM Wood 



I. 3. 5i controls, in i8-liter galvanized iron box; 2, 4, 6, cultured in similar 

 box containing 7 pieces of wood (total weight = 780 g.). i, 2, seeds planted on 

 filter-paper-wrapped silica wicks; 3, 4. seeds planted on 1.5-percent agar gel; 

 5, 0. seeds planted on garden loam. Photographed 4 days after planting. 



