714 DONNAN EQUILIBRIUM AND OSMOTIC PRESSURE 



3. The curves of the observed values of the osmotic pressure 

 show two constant minor deviations from the curves of the calculated 

 osmotic pressure. One of these deviations consists in the fact that 

 the values of the ascending branch of the calculated curves are lower 

 than the corresponding values in the curves for the observed osmotic 

 pressure, and the other deviation consists in the fact that the drop 

 in the curves of calculated values occurs at a lower pH than the 

 drop in the curves of the observed values. 



