1909.] NATURAL SCIENCES OF PHILADELPHIA. 99 



leaves withered February 18; flower buds eased January 25; flowers 

 opened January 27; first flower withered January 29; all flowers 

 withered January 30. New Brunswick, New Jersey : Leaf buds eased 

 February 3 ; leaf buds burst February 5 ; all leaves withered February 

 14. Lafayette, Indiana: No response. 



Conclusions Based on Experiments. 



The experiments of the second year corroborate those of the first 

 year in many particulars. First, it will be noticed that in every case 

 where the twigs responded, they followed the sequence already estab- 

 lished among the branches from the same locality. In the first experi- 

 ments, the phenologic sequence was established by contrasting the 

 development of plants out of doors with those treated experimentally 

 in the greenhouse, and it was found, as before emphasized, that the bud 

 development in chemical solutions followed the same order as out of 

 doors. The experiments of the second year go to prove the same thing. 

 However, we know that in general pear trees blossom earlier than 

 apple trees; that Forsythia flowers earlier than the horse chestnut; 

 that the male catkins of the Carolina poplar appear earlier than the 

 flowers of the linden and the oak throughout the Eastern United States 

 at large. 



By correspondence with the stations from which the twigs were 

 obtained the following phenologic data was secured that shows the 

 sequence of bud development: 4 



Amherst, Massachusetts. — 1, Morello Cherry; 2, Baldwin Apple; 3, 

 York Imperial Apple; 4, Bartlett Pear; 5, Seckel Pear. 



Ithaca, New York. — 1, Red Maple; 2, Forsythia viridissima ; 3, Caro- 

 lina Poplar; 4, Kieffer Pear; 5, Seckel Pear; 6, Horse Chestnut. 



Geneva, New York. — 1, Early Crawford Peach; 2, Duchess de Angou- 

 leme Pear; 3, Maiden Blush Apple; 4, Seckel Pear; 5, York Imperial 

 Apple; 6, Baldwin Apple; 7, Red Astrachan Apple; 8, Bartlett Pear; 

 9, Winesap Apple. 



Pennsylvania State College (average for ten years). — 1, Forsythia 

 viridissima; 2, Horse Chestnut; 3, Morello Cherry; 4, Carolina Poplar; 



5, Tulip Poplar; 6, Kieffer Pear; 7, Pin Oak; 8, Linden. 



College Park, Maryland. — 1, Forsythia viridissima; 2, Early Crawford 

 Peach; 3, Oldmixon Peach; 4, Late Crawford Peach; 5, Kieffer Pear; 



6, Duchess de Angouleme Pear; 7, Seckel Pear; 8, Red Astrachan 



4 Replies were obtained from Lafayette, Indiana, and New Brunswick, New 

 Jersey, but these stations were unable to furnish any phenologic data. No replies 

 were obtained from the stations in Connecticut, Michigan and Alabama. 



