94 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Water. — University of Pennsylvania: Leaf buds eased February 7; 

 leaf buds burst February 14; first leaf unfolded February 28; first 

 leaf withered February 24, while this branch showed green leaves on 

 March 14. Pennsylvania State College: Leaf buds burst February 

 14; first leaf unfolded February 14. New Brunswick, New Jersey: 

 Leaf buds burst February 7 ; first leaf unfolded February 8 ; all leaves 

 unfolded February 28; roots appeared on March 14 and the branch 

 was still green. Lansing, Michigan: Leaf buds eased February 4. 

 Lexington, Kentucky : Leaf buds eased February 6, as also those from 

 Auburn, Alabama. 



Red Maple (Acer- rubrum). — 



The only responses obtained with branches of the red maple from 

 the localities noted in the table at the beginning of the experimental 

 data were with those from Lansing, Michigan, placed in sodium bicar- 

 bonate. The flower buds eased on January 25; flower buds burst on 

 January 27 ; first flower withered on January 29 ; all the flowers with- 

 ered on January 30. 



The twigs from New Brunswick, New Jersey, in water show their 

 leaf buds burst on February 11; on February 15 the first leaf had 

 unfolded. The leaf buds on branches from Ithaca, New York, burst 

 on February 18. 



Horse Chestnut (JZsculus hippocastanum) . — 



Corrosive sublimate (weak). — Storrs, Connecticut: Leaf buds eased 

 January 31; leaf buds burst February 21. 



Copper sulphate (weak). — Storrs, Connecticut: Leaf buds eased 

 January 30; leaf buds burst February 4. 



Sodium chloride (strong). — University of Pennsylvania: Leaf buds 

 eased February 1; leaf buds burst February 11. Pennsylvania State 

 College: Leaf buds eased January 31; leaf buds burst February 7; 

 first leaf unfolded February 8; all leaves unfolded February 14; first 

 leaf withered February 18; all leaves withered February 24. 



Sodium chloride (weak). — Storrs, Connecticut: Leaf buds eased 

 January 31; leaf buds burst February 3; first leaf unfolded February 

 7; first leaf withered February 14; all leaves withered February 18. 



Ammonium nitrate (weak). — Ithaca, New York: Leaf buds eased 

 February 1 ; leaf buds burst February 7. 



Ammonium oxalate (strong). — University of Pennsylvania: Leaf 

 buds eased January 31; leaf buds burst February 11. Ithaca, New 

 York: Leaf buds eased February 14. 



