INTRODUCTION. 



33 



To show the relation between the return of birds from the 

 South and the vernal change of vegetation, I give the following dates 

 of the leafing and flowering of certain plants at Mt. Carrnel, as noted 

 in the spring of 1872, by Dr. J. Schneck. It should be remarked, 

 however, that the season was much later than usual. (See foot- 

 note below.) 



* In 187C, flowered February 1. 

 tin 187G, flowered February 15. 

 1 In 1876, flowered March 2. 

 In 1876, flowered March 2. 



