1904.] 



Studies on Enzyme Action. 



199 



these papers gives a very satisfactory explanation of the observed 

 phenomena ; as before stated, the differences between acid and enzyme 

 action can all be attributed to the crystalloid nature of the former and 

 the colloid nature of the latter. 



Influence of the Products of Change. In view of the theoretical impor- 

 tance of the influence of the products of change,* it appeared desirable 

 to extend our experiments in this direction to cane sugar. Accordingly 

 the effect of adding 9 grammes of glucose or fructose to 100 c.c. of 

 17"! per cent, sucrose containing half a gramme molecule of hydrogen 

 chloride has been determined in the manner previously described by one 

 of us for /3-camphor sulphonic acid at 20. 



The results are incorporated in the following tables : 



Table V. 



Table VI. 



Table VII. 



VOL. LXXIV. 



* Loc. cit., p. 534. 



