JACQUES LOEB 



81 



By dividing the weight of albumin in solution by its volume, we 

 should obtain the density of albumin which should be according to 

 the direct determination not far from 1.36 (Arrhenius) .* Table II 

 shows that if we calculate the density of solutions of albumin chloride 

 on the basis of Einstein's formula we obtain values which only vary 

 inside the limits of accuracy of the experiments from the density deter- 



t 



8 



O 



1.5 



1.0 



^ 0.5 



1 2 3 4 5 6 7 8 9 10 U 12 13 14 



Concentration of albumin in per cent 



Fig. 4. Viscosity ratio of solutions of crystalline egg albumin near the isoelectric 

 point. Inside the concentrations used, the viscosity ratio is nearly a linear function 

 of the concentration. 



TABLE II. 



mined directly. The time of outflow of water through the viscometer 

 was 227 seconds at 15°C. 



Entirely different results should be expected in the case of solutions 

 of gelatin if the high viscosity is due to swollen particles of solid jelly 

 contained in the solution and not due to the existence of a network, 

 as some authors assume. When we plot the curve for the influence 

 of concentration on the viscosity of solutions of isoelectric gelatin we get 



