86. 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



February 1 ; leaf buds burst February 3 ; flower buds burst January 

 28. 



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

 eased February 1 ; leaf buds burst February 3 ; first leaf unfolded 

 February 4; all leaves withered February 8. 



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

 January 29; leaf buds burst January 31; first leaf unfolded February 

 3 ; all leaves withered February 8. 



Chromic Acid (strong). — University of Pennsylvania: First leaf 

 unfolded February 3; all leaves unfolded February 4; first leaf 

 withered February 8; all leaves withered February 14; flower buds 

 eased January 29; flower buds burst January 30; flowers closed 

 January 31; first flower withered February 11. 



Water. — 



Pear (Clapp Favorite). — 



No response was observed with twigs from New Brunswick, New 

 Jersey, in strong copper sulphate; with twigs from Storrs, Connecticut, 

 in weak ammonium oxalate. 



Corrosive sublimate (strong). — New Brunswick, New Jersey: Leaf 

 buds eased February 1 ; leaf buds burst February 3 ; first leaf unfolded 

 February 7; all leaves unfolded February 11; first leaf withered Feb- 

 ruary 14; all leaves withered February 24. 



Sodium chloride (strong). — New Brunswick, New Jersey: Leaf buds 

 eased February 1. 



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

 January 31 ; leaf buds burst February 3. 



Ammonium nitrate (weak). — New Brunswick, New Jersey: Leaf 



