1909.] NATURAL SCIENCES OF PHILADELPHIA. 95 



Ammonium oxalate (weak). — Storrs, Connecticut: Leaf buds eased 

 January 31; leaf buds burst February 3. Lansing, Michigan: Leaf 

 buds eased February 3; leaf buds burst February 4; first leaf unfolded 

 February 7; flower buds burst February 5; first flower withered Feb- 

 ruary 14; all flowers withered February 18. 



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

 buds eased February 1 ; leaf buds burst February 8. 



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

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

 7; all leaves unfolded February 18; all leaves withered February 21. 

 Lansing, Michigan: Leaf buds eased February 4; leaf buds burst 

 February 7. 



Sodium bicarbonate (strong). — University of Pennsylvania: Leaf 

 buds eased February 1 ; leaf buds burst February 7. Pennsylvania 

 State College : Leaf buds eased January 30 ; leaf buds burst January 31 ; 

 first leaf unfolded February 11. New Brunswick, New Jersey: Leaf 

 buds eased February 4; leaf buds burst February 7; first leaf unfolded 

 February 11; first leaf withered February 14; all leaves withered 

 February 18. 



Sodium bicarbonate (weak). — Lansing, Michigan: Leaf buds eased 

 February 4; leaf buds burst February 7; first leaf unfolded February 

 11; all leaves withered February 18. Lexington, Kentucky: Leaf 

 buds eased February 3 ; leaf buds burst February 7 ; first leaf unfolded 

 February 11; all leaves unfolded February 21 ; first leaf withered 

 February 21 ; all leaves withered February 24. 



Potassium bisulphate (strong). — New Brunswick, New Jersey. 

 Leaf buds eased February 4; leaf buds burst February 5; first leaf 

 unfolded February 7. Geneva, New York: Leaf buds eased January 

 30 ; leaf buds burst February 3. 



Potassium bisulphatc (weak). — Lansing, Michigan: Leaf buds eased 

 February 3; leaf buds burst February 7; first leaf unfolded February 

 11. Lexington, Kentucky: Leaf buds eased February 4; leaf buds 

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

 February 21 ; all leaves withered February 24. 



Hydrochloric Acid (weak). — Lansing, Michigan: Leaf buds eased 

 February 3; leaf buds burst February 11. 



Acetic Acid (strong). — New Brunswick, New Jersey: Leaf buds 

 eased February 5; leaf buds burst February 8. 



Acetic Acid (weak). — Lexington, Kentucky: Leaf buds eased Feb- 

 ruary 4 ; leaf buds burst February 7. 



Water. — 



