VELOCITY OF REACTION. HOMOGENEOUS SYSTEMS 8 1 



As the end-value was not measured, we may only con- 

 clude that the change of the conductivity is very nearly 

 proportional to the square root of the time of digestion, as 

 is seen in the last column. It might therefore be regarded 

 as probable that these experiments are not in opposition 

 with those made by other observers, who have found that 

 the rule of Schutz 1 holds good during the first time of 

 digestion. The same authors have also digested casein dis- 

 solved in a 2 per cent solution of sodium carbonate in the 

 same manner. They found the following changes of the 

 conductivity (at 44 C.) : 



During the first time (30 min.) the change is nearly pro- 

 portional to the square root of the time. 



Another series of experiments were concerned with the 

 problem of the digestion of different quantities of gelatine 

 or casein, or of both simultaneously, by means of a con- 



1 Schiitz and Huppert : Pfluger*s Archiv. 80. 470 (1900). 

 G 



