VELOCITY OF REACTIONS 



39 



value 1884 as ordinate. The curves drawn are 

 calculated by means of a formula given below. 

 The rule of Schutz is given by the tangent at the 

 origin to the curve ; it is represented by a broken 

 line and agrees with experiment till about 50 per 

 cent are digested. 



100 



80 



60 



t 



20 



vr- 



Fig. 8. 



As is seen from the diagram, the observed values 

 indicated by circles lie below the theoretical curve 

 represented by the formula on p. 42 (the line 

 drawn) for high values of t and above it for low 

 values of t. The explanation of this behaviour 

 is obvious. It is supposed that every molecule 

 of the peptone, formed by the decomposition of 

 the albumen, binds an equivalent quantity of the 



