62 PROCEEDINGS OF THE ACADEMY OF [Feb., 



No response was noticed in any of the twigs on March 8 and March 

 11, except in the case of the twig in ether water which showed a slight 

 easement of the upper buds. This stimulus was only a temporary one, 

 because on March 11 no enlargement was noticeable. On March 15, 

 the twigs in water, menthol water, ether water, ammonium hydrate, 

 ammonium sulphate and corrosive sublimate had responded and the 

 extent of this response will be indicated in what follows. It should 

 be noted, however, that the buds on the twigs on March 15 in the ammo- 

 nium hydrate solution had burst and the leaves were about to unfold, 

 while the buds of the twigs in the filtered water, in the corrosive sub- 

 limate and in the ammonium sulphate were just beginning to burst 

 open. 



Chromic Acid (one per cent). — No response whatever on any of the 

 dates. 



Water {A). — March 15: Buds enlarged and green, but not open. 

 March 18: Large buds burst, leaves about to unfold. March 20: 

 Lateral buds open, one leaf began to unfold. March 25: Lateral buds 

 with first leaves partly unfolded, terminal buds burst. March 28:- 

 Terminal buds fully expanded, one or two leaves unfolded. April 1 : 

 Two leaves of lateral bud expanded. April 5: No advance. April 

 13: Leaves broad, bright green, twig fresh. 



Sodium bicarbonate. — No reaction. 



Sodium chloride. — No response, twigs eventually killed. 



Sulphuric Acid (five-drop solution). No response until March 18 

 when the buds were slightly enlarged. March 20: A slight additional 

 enlargement. March 25, March 28, April 1 : No advance. On April 

 13 the twig was dead. 



Hydrochloric Acid. — No response. 



Sulphuric Acid (twenty-drop solution). — No reaction, eventually 

 killed. 



Menthol Water. — March 15: Terminal bud enlarged, but not open. 

 March 18: Terminal bud burst, but the leaves are tightly folded. 

 March 25: Terminal bud with bud scales separated, leaves not 

 expanded. March 28, April 1, April 5: No advance. April 13: Twigs 

 dea I. 



Filtered Water (B). — March 15: Buds enlarged. March 18: Buds 

 burst. March 20: Buds well open, first leaf about to expand. March 

 25: Leaves of terminal bud all fully expanded. March 28: Leaves 

 of upper two buds flattened. April 1 : Green leaves fully developed. 

 April 5: Adventitious roots appeared, leaves fully matured. 



Ether Water. — March 15: Buds large and very green, about to burst. 



