1909.] NATURAL SCIENCES OF PHILADELPHIA. 75 



Potassium bisulphate. — The twigs from Storrs, Connecticut, kept in 

 weak potassium bisulphate responded by the easing of the buds on 

 February 4; on February 5 the buds had burst, and on February 7 

 the first leaf had unfolded. The twigs from Michigan made a slight 

 response in this weaker solution by the bursting of the buds on Feb- 

 ruary 1. 



Hydrochloric Acid. — The Baldwin Apple twigs from Michigan in the 

 weak acid solution made no response. 



Acetic Acid. — No response in the strong acetic acid solution. Twigs 

 from Storrs, Connecticut, responded by the buds easing on January 

 31. After the buds had burst on February 11 no other response was 

 noted. 



Nitric Acid. — No response. 



Water. — The Baldwin Apple twigs from Pennsylvania State College 

 responded on January 29 by the easement of the flower buds ; on Feb- 

 ruary 3 the flower and leaf buds had burst; on February 4 the flower 

 buds had protruded from the winter bud scales. On February 18 

 all of the flowers were found withered. The twigs from New Bruns- 

 wick, New Jersey, responded on February 1 with the easement of the 

 leaf buds; on February 3 the leaf buds had burst; on February 5 the 

 flower buds burst ; while on February 7 the first leaf was unfolded, and 

 on February 21 all of the leaves had unfolded. The flowers made no 

 further response. The twigs from Geneva, New York, responded on 

 January 31 by an easement of the buds. On February 4 the leaf buds 

 had burst. The twigs from Storrs, Connecticut, responded as follows: 

 February 1 leaf and flower buds eased; February 3 leaf and flower 

 buds burst; February 4 first leaf unfolded. From this time until 

 death no other developments were noted. The development of the 

 twigs from Massachusetts showed a more steady course. On January 

 31 the buds had eased; on February 4 the buds had burst; on February 

 5 the first leaf had unfolded ; on February 8 all the leaves had unfolded ; 

 on February 14 the first leaf had withered. The Michigan twigs 

 responded first on January 29 with the easing of the buds ; on January 

 31 the buds had burst; on February 1 the first leaf had unfolded; on 

 February 4 all of the leaves had unfolded, while on February 14 the 

 first leaf had withered and on February 18 all of the leaves had withered. 

 The Baldwin apple twigs from Lafayette, Indiana, made response on 

 February 4 with the bursting of the buds. On February 6 the first 

 leaf had unfolded and on February 14 all of the twigs were dead. 



Apple (Early Harvest). — 



Corrosive sublimate. — Tl e twigs from College Park, Maryland, in 



