JACQUES LOEB 



499 



tical, and so are the values for Ca and Ba gelatinate. But the values 

 for Na gelatinate and Ca gelatinate differ. The reader will notice 

 that the values for pH are higher than in the curves for osmotic pres- 

 sure. This is due to the fact that in the latter case the pH was deter- 

 mined after the excess of alkali had been removed by washing and 

 dialysis, while the nature of the experiment made it necessary for us 



Ca(0H)2 iLiLilii il nil il 



cone. 8l9a 4096 2048 1C24 512 256 128 64 



ph 4.8 4.9 5.1 54 74 9.9 10.3 10,5 



Fig. 11. See explanation under Fig. 9. 



Ba(0H)2 _M__M__M__M__M _M__M_ il il il 



cone. 8192 4096 2048 I0£4 512 256 128 64 32 Tb 



pH 4.8 4.9 5,1 55 84 10.0 10,3 104 10.6 110 



Fig. 12. See explanation under Fig. 9. 



to determine the pH in the experiments on swelling and viscosity 

 only after washing away the greater part of the excess of alkali, 

 without using dialysis. 



Neither the values for swelling nor for viscosity are as accurate as 

 those for the osmotic pressure and hence the former cannot well serve 

 for the purpose of drawing conclusions in regard to the molecular 



