﻿242 



30 



Cotyledons. 



No side-roots were formed before the exposure; after tlie exposure side-roots were indicated as 

 protuberances in 2 and 3; all the seedlings were fresh. 



('. Seedlings 4 days old were used for the experimenl. 

 Weight of the portions before the exposure: 



1. 2. 3. 4. 



21-31 gr. 20-96 gr. 21-43 gr. 21-42 gr. 



Each portion contained 47 seedlings. Temp. = 14 — 17° 



Cotyledons. 



1. Directly crushed 



2. 2 days without ether 



3. 2 — witli 0(15 c.c. ether per liter 



4. 2 — — 028 — — — 



88-28 

 84-75 

 85-43 

 86-92 



Before the exposure no side-roots; after the exposure all the seedlings were fresh; side-roots had 

 Ijeen developed, especially in 3; only to a slight degree in 4. 



