98 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Copper sulphate (weak). — No response exhibited by Storrs, Connec- 

 ticut; Lansing, Michigan; Lexington, Kentucky. 



Sodium chloride (strong). — Ithaca, New York: No response. Uni- 

 versity of Pennsylvania : Leaf buds eased February 7 ; leaf buds burst 

 February 11. 



Sodium chloride (weak). — Storrs, Connecticut: No response. 



Ammonium nitrate (strong). — Lansing, Michigan: Leaf buds eased 

 February 7. Lexington, Kentucky: Leaf buds eased February 18. 

 No response of twigs from University of Pennsylvania; Ithaca, New 

 York; Storrs, Connecticut; Lexington, Kentucky; Lansing, Michigan; 

 Lafayette, Indiana; Pennsylvania State College; New Brunswick, New 

 Jersey, and Geneva, New York, in weak ammonium nitrate, strong 

 and weak ammonium oxalate, strong and weak potassium chloride, 

 strong and weak sodium bicarbonate, strong potassium bisulphate, 

 strong hydrochloric acid, weak acetic acid, strong and weak nitric 

 acid, strong chromic acid. 



Ammonium oxalate (weak). — Lexington, Kentucky: Leaf buds 

 eased February 7; leaf buds burst February 11. 



Potassium chloride (strong). — University of Pennsylvania: Leaf 

 buds eased February 3; leaf buds burst February 7. 



Sodium bicarbonate (weak). — Leaf buds eased February 5. 



Acetic Acid (strong). — University of Pennsylvania: Leaf buds eased 

 February 4. 



Water. — University of Pennsylvania: Leaf buds eased February 4; 

 leaf buds burst February 7 ; first leaf unfolded February 11; all leaves 

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

 withered February 24. New Brunswick, New Jersey: Leaf buds 

 eased February 7; leaf buds burst February 11. Ithaca, New York: 

 Leaf buds burst February 7. Storrs, Connecticut: Leaf buds eased 

 February 7. Lansing, Michigan: Leaf buds eased February 4; leaf 

 buds burst February 6. Lexington, Kentucky: Leaf buds eased 

 February 4. 



Yulan Magnolia (Magnolia conspicua). — 



Corrosive sublimate (strong) : University of Pennsylvania : Flower 

 buds eased January 27. No response of twigs from University of 

 Pennsylvania or New Brunswick, New Jersey, in strong ammonium 

 oxalate, potassium chloride, sodium bicarbonate (strong), potassium 

 bisulphate (strong) and chromic acid (strong). 



Water. — University of Pennsylvania: Leaf buds burst January 31; 

 first leaf unfolded February 3; all leaves unfolded February 7; all 



