52 



SOAPS AND PROTEINS 



4. Experiments with Triatomic Alcohols (Glycerin) 



The solvation capacities of four sodium soaps of the acetic 

 series and three sodium soaps of the oleic series with glycerin are 



FIGURE 39 



illustrated in Figs. 39 and 40 and Tables XVIII and XIX. Not 

 only does the oleic series stand below the acetic, but in both series 

 the gelation capacity falls rapidly from the high values obtained 

 with the upper series to the low values in the case of the lower. 



FIGURE 40, 



Fig. 41 illustrates the system sodium linolate, with a diatomic 

 or a triatomic alcohol. When these mixtures are heated to the 

 temperature of a boiling water bath, " solution " occurs, but on 

 cooling the mixtures to 18 C. no gelation follows, despite their 

 high soap content (33.3 percent). We shall return later to 



