Dixon — On the Osmotic Pressure in the Cells of Leaves. 73 



leaves, the first amount Tras O'lOS gr., while the latter -svas only 0-02 

 gr., an amount which approaches the limits of error of the experiment. 

 Prom this we may conclude that the elastic contraction takes place 

 chiefly in the conduits of the leaves. 



I am at present making arrangements of repeating my experiments 

 conducted in CO2 with air, in view of the difference in the critical 

 jjiessure obtained in the two methods. 



