427 



The leftlmnd ends of these curve? indicate the quantity of water 

 present in the gelatin gel at the moment that it was brought into 

 contact with an excess of water. It is seen from their course that 



$0 



So 



10 



,Jo 



rJ* 



> 



So 



00 



Uji. 



^6 



^• 



S^c 



hba^. 



Fig. 4. 

 Imbibition of gelatin gels of different concentrations. The 

 leftside ends of the curves indicate with how many 

 grams of water 1 gram of gelatin was combined to a gel. 

 On the abscissa the time. 



the more water is absorbed and that the rate at which this 

 takes place, increases, as the water-content is already greater at the 

 outset. The different water-content can, however, not be the essential 

 factor, for the same' concentration is found at the end of one and 

 at the beginning of another line. The cause must lie in the gelatin. 



Diagram tig. 5 enables us to form an idea of all these changes. 



The gelatin solution must be considered as a pseudo-ternary 

 system with water, large particles, and small ones as components. 



The line N — N is the equilibrium line. It has been drawn so 

 that in anhydrous state the number of large particles has the greatest 

 value, and in great dilution the smallest value, in this it is assumed 

 that these two kinds of particles are always present side by side. 



