VELOCITY OF REACTIONS 



45 



Digestion of Thymol-gelatine 



The same is the case with the action of rennet 

 on milk. The ^/-rule, which indicates that the 

 action is only dependent on the product qt, is proved 

 by a great number of experiments of Madsen and 

 Walbum, as is indicated by the following table. 

 In this case the liquid slowly loses its fluidity. 

 Therefore we measure the time needed for pro- 

 ducing a certain easily observable degree of stiffness 

 of the milk. 



