THE PERMEABILITY OF ORGANIC MEMBRANES 145 



These two experiments, taken together, show that, since 

 there is a state of equilibrium between a saturated solution 



100 



10% 



0% 



M 2M 4M Sat. 



Nad NaCl NaCl NaCl 



Sat. 

 LiCl 



FIG. 17. CURVE SHOWING INCREASE OF IMBIBITION FORCE IN SEEDS 

 WITH DECREASE OF WATER-CONTENT. 



Percentage of H 2 O is based on absolute dry weight; air-dry seeds are 

 considered to have 8 per cent, of hygroscopic moisture in this 

 diagram. 



of lithium chloride and Xanthium seeds containing about 

 8 per cent, of water, the internal ^forces must be balanced 



10 



