60 PROCEEDINGS OF THE ACADEMY OF [Feb., 



oped into leafy branches two and a half inches long. March 18: All 

 of the branches measured two and a half inches long. March 20 : Slow 

 advance. March 25, March 28, April 1 : No advance. April 5 : Twigs 

 withered. 



(B) March 11 : Leaf buds eased, two flower buds were ready to open. 

 March 15: All of the flower buds were open, leaf buds one-half inch 

 long. March 18: All of the branches were green and two inches long. 

 March 20: The green branches were slowly growing. March 25, 

 March 28: The twigs and leaves were making rapid growth. April 1, 

 April 5, April 13: The growth continued. 



Ammonium sulphate. — March 11: One flower bud showed signs of 

 opening. March 15: Three flower buds advanced to stage of the first, 

 but still tightly closed, no leaf buds open. March 18, March 20, March 

 25: No advance. March 28: Twig dead. 



Corrosive sublimate. — March 11 : Lower pair of leaves in each of the 

 leaf buds were expanded. March 15: Branches were two inches long 

 and three pairs of leaves expanded. March 18: Branches two to two 

 and one-half inches long, flowers all withered. March 20: Leaves 

 of twig all flat. March 25 : Leaves were all expanded and had grown 

 in size. March 28 : Leaves began to wither. April 1 : Twigs unhealthy. 



Hydrochloric Acid (ten-drop solution). — March 11: Middle buds 

 of twig eased. March 15: Buds were three-quarters of an inch long, 

 leaves were not unfolded. March 18: Three buds were burst, but on 

 March 20 no advance in these buds was shown. March 25, 2 8,' April 1 : 

 No advance in twig. April 5: Twig dead. 



Magnolia conspicua. — Only two solutions were used in experi- 

 menting with the twigs of this tree. Two grams of ammonium nitrate 

 were dissolved in 200 cubic centimeters of water. Filtered water was 

 also used as a control. On March 8 the twigs did not show response in 

 either liquid. The first response was shown on March 11. 



Ammonium nitrate. — March 11: The large terminal bud was burst, 

 white petals shown at the base. March 15: Bud opened, but no ad- 

 ditional development. March 18: No advance. March 20: Termi- 

 nal buds unhealthy. March 20: All the buds were dead. 



Filtered Water. — March 8: No response. March 11: Flowers fully 

 open with the petals reflexed, but the stamens still closed. March 15: 

 Flower buds withered. March 18 : First foliage leaf expanded. March 

 20 : The twig was a little more advanced. March 25, March 28, April 1 : 

 Twig was dead. 



iEscuLUs hippocastanum. — Five solutions were used with the horse 

 chestnut, viz., five drops of hydrochloric acid in fifty cubic centimeters 



