FURTHER STUDIES ON THE DYSENTERY BACILLUS. 325 



is the first of such sera whose complementibility by human serum has 

 been proved. 



TABLE X. 



3. The deflection of complement of Neisser-Wechsberg could very 

 readily be demonstrated with this serum and pointed the way for a 

 new method of specifically enriching bacterial cultures in mixtures. 



4. The change of the agglutinin into a proagglutinoid succeeded 

 both in dysentery serum and typhoid serum. 



5. Various strains may possess a somewhat different receptor 

 apparatus. By means of continued culture on milk a certain change 

 in the behavior of the receptor apparatus of dysentery bacilli could 

 be effected. 



In conclusion, I wish to express my thanks to Prof. Ehrlich and 

 Prof. M. Neisser for aiding me in this study. 



