LECTURES ON IMMUNITY 



us in a certain sense of the great resistance of dried 

 spores to high temperatures as compared with the pro- 

 nounced destructive influence of higher temperatures on 

 developed bacilli in fluid media. 



Dr. Euler has collected the experimental data l bearing 

 upon the catalytic action of ferments. In most cases we 

 find that the influence of the time of reaction may be 

 represented as a monomolecular process. Thus, for 

 instance, he finds for the decomposition of hydrogen 

 peroxide (H 2 O 2 ) by solutions containing 3.4 or 5 c.c. of 

 the juice of the Boletus s caber to the 200 c.c. the following 

 values at 15 C. 2 q is the quantity of H 2 O 2 , determined 

 by titration with o.oi n. KMn O 4 ; n is the concentration of 

 the " catalase," / time in minutes. 



The constant of reaction K, calculated for a monomo- 

 lecular reaction, increases with the concentration slightly 

 more than proportionally. In the same manner, accord- 

 ing to the investigations of Bredig and M tiller von Berneck, 



1 Euler: "Katalyse durch Fermente," Zeitschr. f. ph. Ch. 45. 420 (1905). 



2 Euler : " Zur Kenntnis der Katalasen," Beitrage zur chemischen Physi- 

 ologie, 7. h. 1-3 (1905). 



