SMITHSONIAN MISCELLANEOUS COLLECTIONS 



VOL. 95 



Table 2. — Influence of Mercury Arc Radiation on Growth Suhstaiice 

 Excised tips illuminated vertically (Avena) 



9 tests made. 

 16 tests made. 



Table 3. — Inftttence of Mercury Arc Radiation on Groivth Substance 

 Excised tips illuminated vertically {Zea mays) 



» 10 half tips applied in test. 

 »> 22 half tips applied in test. 



