188 



This is the per cent of glycerin combined with the soluble acids of the 

 hard portion. 



The difference between the per cent of glycerin combined with the 

 per cent of soluble acids of the soft portion and the per cent of glycerin 

 combined with the per cent soluble acids of rbe hard portion, then, is 

 2.14 — 1.61=.53%. This agrees closely with the difference of the glycerin 

 between hard and soft portions as shown by analyses. (See Table VI.) 



The per cent of glycerin combined with the insoluble acids is nearly 

 the same in both soft and hard portions, because the per cent of in- 

 soluble acids in the soft and hard portions differs very little. Also the 

 variation in the composition of the insoluble acids would not materially 

 affect the molecular weight. Therefore, it is reasonable to expect that 

 nearly the same per cent of glycerin is combined with the insoluble acids 

 of both the soft and the hard portions. 



