JACQUES LOEB 



101 



influence of electrolytes on the viscosity of gelatin solutions is due 

 to the influence of the electrolytes on the swelling of solid submi- 

 croscopic particles of gel in the solution. 



1.4 1.6 1.8 E.0 2.2 24 ^6 2.8 3.0 3.2 3.4 3.6 3.8 40 4.2 44 46 



Fig. 2. The influence of replacing liquid by powdered gelatin on viscosity is 

 exactly the reverse as on osmotic pressure. The more the powdered particles 

 replace the liquid gelatin the higher the specific viscosity. 



The nature of the curves in Fig. 2 between pH 4.6 and 3.8 requires 

 an explanation. The curves are here the lower the more liquid gelatin 

 is replaced by solid gelatin. This is due to the fact that it was neces- 



