104 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Weak Potassium bisulphate (Clapp Favorite Pear). — 



Lansing, Mich. Storrs, Conn. 



Leaf buds eased January 30. January 30. 



Leaf buds burst February 1. 



First leaf unfolded February 3. February 4. 



(Kieffer Pear). — 



Lafayette, Ind. Lansing, Mich. 



Leaf buds eased February 3. 



Leaf buds burst January 29. 



First leaf unfolded February 5. February 3. 



(JEsculus hippocastanum). — 



Lansing, Mich. Lexington, Ky. 



Leaf buds eased February 3. February 4. 



Leaf buds burst February 7 . February 7. 



First leaf unfolded February 11. February 11. 



The same coincidence of dates will be noticed with this tree as 

 noted above. The response is more rapid with the more northern 

 tree than with the more southern, but the subsequent development 

 runs parallel as to the dates at which the various manifestations of 

 development occur. 



Weak Hydrochloric Acid (Kieffer Pear). — 



Lansing, Mich. Lafayette, Ind. 



Leaf buds eased January 29. January 30. 



Leaf buds burst January 31. January 31. 



Strong Acetic Acid (JEscidus hippocastanum). — 



University of New Brunswick, 



Pennsylvania. N. J. 



Leaf buds eased January 31. February 5. 



Leaf buds burst February 7. February 8. 



Weak Acetic Acid (Red Astrachan Apple). — 



Storrs, Conn. Auburn, Ala. 



Leaf buds eased February 5. 



Leaf buds burst February 3. February 7. 



First leaf unfolded February 4. February 14. 



Weak Nitric Acid (Red Astrachan Apple). — 



Storrs, Conn. Auburn, Ala. 



Leaf buds eased February 4. February 7. 



Leaf buds burst February 5. February 11. 



