64 COLLOID CHEMISTRY OF THE PROTEINS 



Table 21 (Fig. 13). 



Concentration of HCl . o.o 0-005 o - oi 0-015 0-017 0-02 0-03 0-04 0-05 N 



041 1-083 1-166 1-243 1*243 1-232 1-165 I-I 36 I-I2I 



observations of Laqueur and Sackur on the effect of salts lose 

 their validity as an explanation of the alkalinity-viscosity curve 

 of casein. Nevertheless, their view, that in excess of alkali the 

 ionisation of the caseinate is suppressed, has proved to be 

 correct. 



Pauli and his co-workers have explained the course of the 

 viscosity curve of hydrochloric acid and albumin by the same 

 ionic conceptions as those employed by Laqueur and Sackur. 

 The work of Manabe and Matula has finally settled the paral- 

 lelism between the viscosity curve and the ionisation curve as 

 determined by the electrometric method (Table 21 A, Fig. 14). 



Table 21 a. 



We give next a very complete series of careful measurements 

 of the viscosity of horse-serum albumin (free from salts) made 

 by Pauli and R. Wagner,* which include the initial decrease. 



* Biochem. Zeitsch., 1910, 27, 297. 



