JACQUES LOEB 



691 



TABLE I. 



Showing that the Mass of Air Roots in a Stem Diminishes with the Mass of the 

 Apical Leaf. The Stems were Split Longitudinally, Each Half Posses- 

 sing One Sister Leaf at the Apex. In One Set the Leaf Was Left 

 Intact, in the Other It Was Reduced in Size by Cutting 

 Of Part of the Leaf. The Stems with Reduced 

 Leaf Invariably Formed a Small 

 Mass of Roots. 



