100 PROCEEDINGS OF THE ACADEMY OF [Feb., 



Apple; 9, Early Harvest Apple; 10, Maiden Blush Apple; 11, York 

 Imperial Apple. 



Lexington, Kentucky. — 1, Tulip Poplar; 2, Oldmixon Free Peach; 

 3, Carolina Poplar; 4, Horse Chestnut; 5, Linden. 



This general sequential development is preserved in the experimental 

 liquids. The same phenomenon with reference to the action of poisons 

 was emphasized in the experiments of the second year. As the data 

 will show, buds were eased and many burst by the stimulating action 

 of the various chemicals. In some instances the leaves unfolded, 

 flower buds opened and such leaves and flowers reached their normal 

 size. This was notably the case with flowers of Forsythia viridis- 

 sima (Pennsylvania State College) in strong corrosive sublimate solu- 

 tion, with the leaves of the Seckel pear (College Park, Maryland) 

 in the same solution, with the leaves and flowers of the Kieffer pear 

 (from Michigan) in the weak corrosive sublimate, with the leaves of 

 Populus monilifera (Auburn, Alabama) in weak copper sulphate 

 solution, with the Bartlett pear flowers (Amherst, Massachusetts) 

 in weak copper sulphate, with the York Imperial apple (Amherst, 

 Massachusetts) in weak sodium chloride, with the horse chestnut 

 ( Pennsylvania State College) leaves in strong sodium chloride, with the 

 York Imperial apple (Amherst, Massachusetts) leaves in weak sodium 

 chloride, with the red maple (Lansing, Michigan) flowers in weak 

 sodium chloride, with the Forsythia (Lexington, Kentucky) flowers 

 in strong ammonium nitrate, with the Populus monilifera (Auburn, 

 Alabama) leaves in the same solution. In the weak ammonium 

 nitrate solution, the leaves of the Forsythia twigs from Pennsylvania 

 State College reached full size, as did those of Populus monilifera from 

 Philadelphia in strong potassium chloride and the flowers of the Bart- 

 lett pear (Lansing, Michigan) in weak potassium chloride. The flowers 

 of Clapp Favorite and Kieff er pears opened when the twigs were placed 

 in weak potassium bisulphate, as also the leaves of the Kieffer pear 

 twigs from Lafayette, Indiana. In weak acetic acid solution, the 

 leaves of the Red Astrachan apple (Auburn, Alabama) opened fully 

 wide. The flowers of the Maiden Blush (College Park, Maryland) 

 opened when the twigs were placed in the weak chromic acid solution. 

 But eventually, with but few exceptions, all of the twigs succumbed, 

 many after the first green leaf had been formed. The strong solutions 

 of copper sulphate, potassium bisulphate, hydrochloric and nitric acids 

 seemed to be arrestive and deadly, because very few of the twigs 

 even responded when placed in these solutions. 

 These results, it seems to the writer, are corroborative of the principle 



