PREFACE vii 



and is ambitious to enter more deeply into the realms 

 of immunity is referred to the systems of Kolle and 

 Wassermann, and Kraus and Levaditi, or the works 

 of Ehrlich and Bolduan, and Bordet and Gay on 

 " Studies in Immunity "; Emery on " Immunity and 

 Specific Therapy "; Wright on " Studies on Immuni- 

 zation "; Simon on " Infection and Immunity "; Cit- 

 ron on " Immunity," and Vaughan on " The Relation 

 of Anaphylaxis to Immunity and Disease." 



B. A. Thomas 

 R. H. Ivy 



William I*epper Laboratory of 

 Clinical, Medicine, 

 Philadelphia, 1915 



