VELOCITY OF REACTION. HOMOGENEOUS SYSTEMS 85 



protein was always present in constant amount. In the 

 following table the quantity of protein is given in per cent 

 n of the total liquid examined. After this, is tabulated the 

 quantity of protein, in per cent of the whole quantity, which 

 had been digested in 2 or in 5 hours. If, for instance, 

 the digested quantity is 10 per cent of the original quantity 

 of protein, the total quantity of digestion-products is double 

 as great if = 2, as if n= i. Now the velocity of reac- 

 tion is inversely proportional to the quantity of digestion- 

 products, therefore the point where 10 per cent are digested 

 is reached later if ;z=2, than if n\. The digested 

 quantity is therefore nearly inversely proportional to the 

 square root of n, as is seen from the following figures, 

 which are compared with figures calculated from the gen- 

 eral formula on p. 64 : 



The agreement seems to be satisfying considering the 

 rather complex composition of the substrate. It indicates 

 that the quantity of digestible matter enters in the formula 

 in the same manner as the quantity of enzyme. In all 

 cases of digestion or lipolysis which are subject to the 

 formulae given above, p. 64, that is to Schiitz's rule, if the 

 process has not gone too far, the concentration of the sub- 



