CONTENTS XXI 



riiRAiioN oi Reacting Poiency of Precipitates 260 



Reacting Potency of Precipitates and Supernatant Fluids 

 Derived from Completely and Partially Precipitated Mix- 

 tures 2()1 



Zone Reactions in Antigen-|-Antibody Complexes in Relaiion 



TO Their Reacting Potency 262 



Combinations of Himian Sennn \viih Horse Ami Human 

 Serum: Mixtures ol Horse Serum with Rabbit Anti-Horse 

 Serum. 



Origin of Reacting Potency of Serum pRECiPirATES 263 



Reacting Potency of Purified Horse Sera and Antisera .... 264 



Reacting Potency of Mixtures of Inactive Bacterial Prepa- 

 rations WITH Specific Immune Sera 264 



Reacting Potency of Mixtures of Detoxified Bacterial 

 Preparations with Specific Immune Sera 265 



Reacting Potency of Miscellaneous Antigens with Homol- 

 ogous Antisera 266 



Skin-preparatory Pofency of Precipitates and Supernatant 

 Fluids Derived from Antigen-|-Antibody Mixtures 266 



Re.\cting Potency of Non-bacterial Substances 267 



In Vivo Formation of Reacting Factors in Rabbits Actively 

 Sensitized to Proteins 270 



Formation of Reacting Factors in Rabbits Passively Sensi- 

 tized TO Animal Proteins 276 



A New Method for Demonstration of Antigen-^Antibody In- 

 teraction 278 



Effect of Reacting Faciors Formed In Vivo Upon Skin Sites 

 Prepared by Non-bacterial Factors 279 



Effect of Intradermal Reinjection of Antigen-)-Antibody 

 Mixture Into Sites Prepared with Bacterial Filtrates .... 279 



Formation of Reacting Factors in Rabbits Actively Sensi- 

 tized TO Bacterial Substances 280 



Formation of Reacting Factors in Rabbits Passively Sensi- 

 tized TO Bacterial Filtrates 281 



B. luhcvi ulo.sis: Pneinnococcus Tyj)e in. 



Formation of Reacting Factors Through Interaction of 

 Antigen or Antibody Injected Into the Prepared Site with 

 Antibody or Antigen Injected Intravenously 281 



Effect of Bacterial Filtrates Injected Intravasculari.y 

 Upon Reactions to ANTiGEN-f Antibody Complexes 283 



