New York AGRICULTURAL EXPERIMENT STATION. 273 
> 
S 
S 
w 
Equivalent Volume of Solution 

600 

0 400 
cc a Acid Fixed by 1gram Casein. ——> 
I'ic. 20.— Curves express relation at equilibrium between dilution of vari- 
ous acids and amounts fixed by one gram of casein. 
Comparison with Fig. 19 shows that the curves are characteristic of 
adsorption. 
Comparison of the curves with each other at the same dilution shows the 
relative amounts of the different acids adsorbed. 
18 
