VELOCITY OF REACTION. HOMOGENEOUS SYSTEMS 67 



The figures in brackets are interpolated. KP 125, if 

 P is expressed in per cent ; and A 1000. 



Sjoqvist found that f was nearly constant for constant 

 and small values of t: in other words, the quantity of 

 transformed egg-albumen is proportional to the square 

 root of the acting pepsin. But there is also another rela- 

 tion which holds good even for long times of reaction : 

 the digested quantity of albumen is a function of Pt only, 

 i.e. the quantity n of pepsin digests the same quantity in 



the time -, as the unit quantity of pepsin in the time t. 

 This is seen from the following table : 



From this it follows, as is seen in the mean values, that 

 if Pt does not exceed a certain value (i.o) the quantity of 

 digested albumen is nearly proportional to the square root 

 of Pt, as is also seen from the calculated values (F) written 

 below the means. 



This was already observed by Emil Schiitz l and has been 

 confirmed by Jul. Schiitz, 2 who dissolved the quantity, /, of 

 pepsin, 10 c.c. of egg-albumen (containing 1-1.2 g. of co- 

 agulable substance), and 29 c.c. I per cent HC1 in 100 c.c. 

 In a digestion of 15 hours at 38 he found the following 

 digested quantities, d, of egg-albumen, i.e. pepton, which is 

 not coagulable : 



1 Emil Schutz: Zeitschr.f. ph. Ch. 9. 577 (1885). 



2 Jul. Schutz: Zeitschr.f. ph. Ch. 30. I (1900). 



