Ill 



rent solutions, containing the same amount of toxin 

 was determined through the comparison of the concen- 

 tration of the solutions, which had effected the same 

 degree of haemolysis; the toxicity of the solution, free 

 of antitoxin, was used as unit. 



In the following table under the heading a the 

 amounts of antitoxin added are indicated, and the other 

 headings indicate the degree of colour of the solution, 

 used for the comparison. 



Tab. 10. 



The relative toxicity of mixtures of toxin and antitoxin at .'57 C. 



Experim. 1. 



Tab. 10 a. 



Corresponding experiment at 37,5 C. 

 Experim. 2. 



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