( 761 ) 
C, C 
Fig. 1. 
The reaction-equation for an unimolecular reaction, where the inten- 
sity of a catalyzer plays a role, may be represented by : 
dC ; 
——=kCT. 
dt 
In the supposed case, therefore, by: 
BS SEE 
En t (k, — ‚CC. 
This is the same equation as the one proposed by Osrwarp *) for 
positive autocatalytie processes, but it seems to me that by introducing 
the intensity-idea the constants, occurring in the formulae obtain a 
more definite significance. 
Then we have for the negative autocatalysis : 
ai 
HO hake 
krikt 
and here /, is again the intensity when all has been converted and 
k, the decrease in intensity when the concentration diminishes with 
the unity. 
Schematically, this may be represented as follows : 
J 
ee ees Fig. 2. 
1) Lehrb. der Allgem. Chem. II, 2 p. 263. 
