78 PROCEEDINGS OF THE ACADEMY OF [Feb. , 



Potassium bisulphate (strong and weak). — No response of any of the 

 twigs. 



Hydrochloric Acid. — In strong acid the twigs from College Park, 

 Maryland, made no response; those from Geneva, New York, did not. 

 In weak solution those from Storrs, Connecticut, and Lansing, Michigan, 

 showed no response. Those from Lafayette, Indiana, responded on 

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

 the first leaf had expanded. 



Acetic Acid. — The buds on twigs from College Park, Maryland, re- 

 sponded on February 1 in strong acid. In weak acid the buds on twigs 

 from Storrs, Connecticut, had burst on February 4, and by February 

 7 the first leaf had unfolded. The first leaf withered on February 14. 



Nitric Acid. — In strong solution the twigs from College Park, Mary- 

 land, had responded by February 1. No other advance was made. 

 In weak acid those from Lafayette, Indiana, responded on February 

 3 and the first leaf burst on February 4. No other change was shown. 



Chromic Acid. — In strong chromic acid the twigs of the Maiden 

 Blush apple from College Park, Maryland, responded on January 29. 

 February 1 marks the response of the flower buds; February 3 the 

 bursting of the leaf buds; February 7 the opening of the flowers; 

 February 14 the opening of the first leaf and the withering of the 

 flowers. By February 18 all the leaves had withered. In dilute 

 chromic acid, the flower buds on twigs from Lansing, Michigan, showed 

 response on January 29. On January 29 the flower buds had burst 

 and on January 31 they were all closed. On February 8 the first leaf 

 bud had burst and on February 11 the first leaf was unfolded. The 

 leaf buds on twigs from Lafayette, Indiana, responded on January 

 29. The leaf buds burst on February 1 and the flower buds on F( 1 1- 

 ruary 7. The leaf buds on twigs from Auburn, Alabama, responded 

 on February 4. The first leaf and flower buds burst simultaneous! v 

 on February 11. The first leaf unfolded on February 14 and all the 

 leaves on February 21. The first leaf withered on March 4. 



Water. — The leaf buds on twigs from College Park, Maryland , 

 responded on January 29; the leaf buds burst on February 3 and 

 the first leaf unfolded on February 4. The first flower bud burst on 

 February 7. The flower buds on twigs from Geneva, New York, 

 responded on January 29. On February 3 the flower buds had burst. 

 On January 31 the first leaf had unfolded. No other change was 

 recorded. The leaf buds of twigs from Connecticut responded on 

 February 4, the buds burst on February 5 and the first leaf unfolded 

 February 11. By February 24 all the leaves had withered. The 



