1911.] 



The Properties of Colloidal Systems. 



93 



logC-^ 



Fig. L 



Data from Fig. 1. 





Angle (0). 



tan0( = Ijn). 





A 



45 



1 



1 



B 



42 



0-9 



i-n 



C 



33 



0-65 



1 -55 



D 



30 



0-58 



1 -72. 



E 



27 -5 



0-62 



1 -92 



F 



15 



0-27 



3-7 



The numbers show, by taking values of n from different experiments, 

 that it is fairly constant for values of enzyme concentration not very far 

 removed from one another and for the same stage of the reaction. It tends 

 to approximate to unity at the beginning and end of the reaetion, but is 

 usually about 1*7. Very rarely is it found to be exactly 2, as the Scbiitz- 

 Borissoff law requires ; although, if a particular limited region im the middle 

 of the reaction be taken, it may have a value very near this, as shown by 

 curve E, which represents the part of a trypsin experiment where the increase 



