Osmotic Concentration and Electrical Conductivity, Etc. 145 



direction is furnished by the fact that A increases while the 

 value K/A decreases with height in arborescent plants. 1 



Diagram 4 



Mean ratio of electrical conductivity to freezing point depression, / A, in leaf 

 tissue fluids of ligneous and herbaceous species classified according to 

 electrical conductivity, K. 



Summary 



Studies in the Arizona deserts, in the Jamaican montane 



1 J. Arthur Harris, R. A. Gortner and John V. Lawrence: Bull. Torr. 

 Bot. Club, 44, 267-286 (191?)- 



