134 COLLOID CHEMISTRY OF THE PROTEINS 



This variation was corrected for by Robertson on the basis of 

 the following line of reasoning. If the anode with the adhering 

 precipitate of casein is immersed in the original caseinate 

 solution, part of the precipitate passes into solution ; this is 

 particularly the case in the solutions containing more alkali and 

 less casein. This quantity is determined, taken as a loss during 



Table 71. 

 50 X io- 5 equivalents KOH per gram of casein. 



Table 72. 



100 X io~ 5 equivalents KOH per gram of casein. 



electrolysis, and the weight of the precipitate corrected by this 

 factor. This argument is, however, erroneous, for the observa- 

 tions on the solution of the precipitate are not made under the 

 conditions which prevail in the neighbourhood of the anode. 

 In that area, in consequence of the more rapid transference of 

 the K- ions (Hittorf), the liquid rapidly becomes weak in casein- 

 ate and thus the quantity of the very substance to which the 



