206 ANTI-BACTERIAL PROPERTIES OP SERUM 



EXAMPLE 2. Partial Exhaustion with a Heterologous Organism- 

 Staphylococcus aureus. 



The result of this experiment is quite clear, and may be summed 

 up in these words : The treatment with dead emulsion of Staphylo- 

 coccus aureus removes much of the bactericidal action, the addition of 

 immune-body for V. Metchnikovi restores it. 



EXAMPLE 3. Partial Exhaustion with a Heterologous Organism 



B. typhosus. 



The result exactly corresponds with the previous one, the treat- 

 ment with B. typhosus removes much of the bactericidal action, the 

 subsequent addition of immune-body for V. Metchnikovi restores it. 

 We also obtained a similar result when the serum was partially 



