74 PROCEEDINGS OF THE ACADEMY OF [Feb., 



on February 4 the first leaf had unfolded ; on February 1 1 all the leaves 

 had unfolded; on February 14 the first leaf had withered, and on 

 February 21 all the leaves had withered. The twigs from Lafayette, 

 Indiana, responded by the bursting of the buds on February 3; on 

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

 had unfolded ; on February 1 1 the first leaf had withered ; on February 

 14 all the leaves had withered. 



Copper sulphate. — Twigs of this apple from Storrs, Connecticut, did 

 not respond. Those from Amherst, Massachusetts, responded by 

 the bursting of the buds on February 7; on February 8 the first leaf 

 had unfolded; on February 15 all the leaves had unfolded, while on 

 February 18 all the leaves had withered. The twigs from Lafayette, 

 Indiana, in weak copper sulphate solution responded on February 8 

 by the bursting of the buds ; on February 1 1 the first leaf had unfolded ; 

 on February 24 the twig had gone bad. 



Sodium chloride. — Twigs of the Baldwin Apple in a weak solution 

 of common salt responded on February 1 by an easing of the buds; 

 on February 3 the buds had burst; on February 4 the first leaf had 

 unfolded, while by February 14 all of the leaves had withered. The 

 twigs obtained from Lafayette, Indiana, made no response. 



Ammonium nitrate. — The twigs from Lafayette, Indiana, in a strong 

 solution of this chemical made response on February 5 by the bursting 

 of the buds. No other response was noted. 



Ammonium oxalate. — The twigs of this apple sent from New Bruns- 

 wick, New Jersey, responded by the easement of the buds on January 

 29. No other response was noted. In weak ammonium oxalate the 

 apple twigs from Lafayette, Indiana, made no response. 



Potassium chloride. — The apple twigs from Storrs, Connecticut, in 

 weak potassium chloride eased their buds on February 3. The buds 

 burst on February 4; on February 5 the first leaf had unfolded; on 

 February 11 all the leaves had unfolded, while on February 11 the first 

 leaf had withered. 



Sodium bicarbonate. — The Baldwin Apple twigs from Pennsylvania 

 State College did not respond in a strong solution of sodium bicar- 

 bonate. The New Jersey grown twigs responded on February 3 and 

 on February 7 the buds had burst. On February 14 all the leaves 

 had withered; January 29 the flower buds had eased. The weak 

 solution of this salt acted more favorably. On February 3 the leaf 

 buds of a Connecticut twig had burst, while a Michigan grown twig 

 responded first on January 30 ; while on January 31 the leaf buds and 

 a first leaf had unfolded. January 29 witnessed the bursting of the 

 first flower bud. 



