177 



PHILLIPS— GEO TROPISM 



[1920 



to be impossible to correlate the differences found with the process 

 of bending. The same may be said of the distribution of nitrogen. 



Summary 



Definite moisture changes accompany geotropic bending in corn 

 nodes. During the early stages of bending there is a greater 

 percentage of moisture in the concave flank. When the process 



TABLE VI 



Analyses of Vicia Faba shoots exposed to gravity 

 (in percentage of fresh weight) 



has developed the percentage of water is greater in the convex 

 flank. 



Although titration acidity is greater in the convex flank, the 

 differences are very slight. The results on hydrogen ion concen- 

 tration, although uniform in direction, are not numerous enough to 

 serve as a basis for conclusions. 



It is impossible, with the data obtained, to correlate the geo- 

 tropic bending of etiolated Vicia Faba shoots with differences in 



