﻿31 



243 



n. Seedlings, 3 days old, were used. Each portion contained 3fi seedlings. 

 Weight of the portions before the exposure: 



2. 3. 4. 5. (i. 7. 



14-81 gr. 14-71 gr. 14-63 gr. 14-84 gr. 14-75 gr. 14-7() gr. 

 Shoots. 



1. 

 14-70 21 



Cotyledons. 



During the exposure side-roots were formed in all the portions except in 7. 



E. Seedlings 5 days old were used. Each portion contained 40 seedlings. 

 Weight of the portions before the exposure: 



1. 2. 3. 4. 



14-37 gr. 13-85 gr. 13-95 gr. 1382 gr. 



Shoots. 



o 3 0, ! 

 ■Ï, 3 — ! 



="£ o,°^ 



