IV 



in question, these constants could hardly with our 

 present knowledge be used for an exact determination 

 of their molecular weight. In the mentioned equation 

 K yin = = 5,4, 5,4 is really no constant, but increases for 

 decreasing molecular weight (or rather, when the mole- 

 cules become less complicated). According to Euler in 

 the case ofCl a this value is 10,2. But when a thorough 

 investigation of the signification of the constant of dif- 

 sion for bodies with a high molecular weight has been 

 made the mentioned method probably will be usefull 

 in the case of toxins and antitoxins. 



7 



