



* 4* 



Figure 1 





After Neufeld and Schnitzer 1 ' 



Figure 2 



THE QUELLUNG PHENOMENON 



Figure 1. Agglutination and Quellung of pneumococci by immune serum 

 in vitro. Figure 2. Pneumococci from the peritoneal cavity of a mouse 

 mixed with concentrated heterologous immune serum (control). 



