THE COLLOID-CHEMISTRY OF SOAPS 



21 



solution in a hot water bath, a dry gel was no longer obtained 

 on reducing the temperature of the mixture to 18 C. It is 

 again evident that only liquid mixtures (true solutions) are 

 obtained upon the addition of even trifling amounts of water to 



sc 



ft. 



72 

 62 

 54 



9 



cc 



GELATION CAPACITIES 



PER GRAM 



OF DIFFERENT 



SODIUM SOAPS WITH 



WATER 



c. c, c . 



I 



c c, c,c. dc. c,c. c,c, <x.c, c.,c c,c,c,c.cc. 



o 



o o o 



= "!?si 



o H _ja 

 a ffl > o 



I III 



1 iz 



FIGURE 11. 



the lowermost members. The actual amounts of water taken up 

 by the higher members per gram of soap are shown in Table 

 VII and, graphically, in \ \^ 11. 



The water-holding < .tn.u itirs of three sodium soap* of the okic 

 series (oleate, elaldate and erucate) and that of toil turn Imolatr 

 are shown in Fig. 12 and Tables VI 1 1 and I X These two tables 



