so 



PROCEEDINGS OF THE ACADEMY OF 



[Feb., 



Sodium bicarbonate (strong). — No response of twigs from College 

 Park, Maryland, and Geneva, New York. 

 Sodium bicarbonate (weak).— 



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

 February 1 ; i leaf 'buds burst February 7 ; first leaf unfolded February 

 11. Auburn, Alabama: No response. 



Hydrochloric Acid (strong). — Storrs, Connecticut: Leaf buds burst 

 February 4. 



Acetic Acid (strong). — Pennsylvania State College: No response. 



Acetic Acid (weak). — 



Nitric Acid (weak). — 



Storrs, Conn. 



Leaf buds eased February 4. 



Leaf buds burst February 5. 



Chromic Acid (weak). — Storrs, Connecticut: Leaf buds burst Feb- 

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

 11 ; first leaf withered February 21; all leaves withered February 24. 



Water. — 



Auburn, Ala. 



February 7. 

 February 11. 



Leaf buds eased 



Leaf buds burst 



First leaf unfolded.. 

 All leaves unfolded 

 First leaf withered.. 

 All leaves withered 

 Flower buds eased.. 



Pennsyl- 

 vania 

 State 



College. 



College 

 Park, 

 Mary- 

 land. 



Geneva, 



New 

 York. 



Storrs, 

 Connec- 

 ticut, 



Lansing, 

 Michi- 

 gan. 



Jan. 30. 

 Feb. 1. 

 Feb. 7. 

 Feb. 7. 

 Feb. 21. 

 Jan. 29. 



Feb. 4. 

 Feb. 6. 



Feb. 18.; I Feb. 8. 



Mar. 17. 



Feb. 18. ' 



Feb. 14. 

 Feb. 24. 



Auburn , 

 Alabama 



Feb. 6. 

 Feb. 11. 

 Feb. 14. 

 Feb. 21. 

 Feb. 21. 

 Feb. 28. 



