256 



12 3 4 5 



10 11 12 li 1-t 



Fig. 14. Decrease in enzyme concentration in the culture solution; séries on 0.4% 

 stdrch+ 1% glucose; 11*'' and U^^ day (d = days). 



Fig. 14 represents the decrease of the enzyme concentration in 

 the culture solutions of the 11 and the 13*^ days of the last 

 mentloned séries. Thèse curves make it very clear, that the inhibi- 

 tion of the diastase takes place according to the law of mass-action. 

 That is why it is not désirable to compare the results of a slow 

 inhibition with one, taking place very quickly, by making obser- 

 vations on both after an equal and small number of days. 



It is quite concelvable that thèse inhibiting substances may in 

 many cases be présent in totally différent quantities. Granting 



