102 COLLOID CHEMISTRY OF THE PROTEINS 



ments of Pauli, which agree well with the former. They can, 

 in fact, be treated from the same point of view as obtains in the 

 case of typical salts. These results, together with those obtained 

 for the salts of albumin with acids, and those so far published 

 dealing with the alkali proteins, all lead to the extremely pro- 

 bable conception that an ordinary metallic salt is formed, which 

 dissociates into positive metal ions and negative polyvalent 

 protein ions. Some very forcible facts supporting this view 

 will be adduced. In the first place, owing to the absence of 

 any marked hydrolysis, it is possible to extrapolate the value 

 of A a from the values of the equivalent conductivity A v , 

 obtained when casemate solutions are progressively diluted. 

 From the data of Laqueur and Sackur and the following tables, 

 in which K is the specific conductivity, and V the volume in 

 litres which contains the equivalent weight of sodium, the 

 value of the equivalent conductivity A x for dilution V = oc could 

 be extrapolated graphically. The values of the degree of 

 dissociation a have been obtained in the usual way as the 

 quotient of A v and A^ . 



Table 49. 

 Sodium Caseinate at 25. 



= 81. 



Table 50 (Fig. 25, I.). 

 Ammonium Caseinate at 25. 



= I0 4 . 



