TABLE OF CONTENTS. 



{From the Laboratory of Professor Errera, Botanical Institute, 

 Brussels.) 

 Chapter Page 



I. The Adaptive Changes of Bacterial Cultures in the Body of 



Immunized Animals 1 



Bordet. 



(From the Laboratory of Professor Metchnikoff, Pasteur Institute, 



Paris.) 



» 



II. Studies on the Serum of Vaccinated Animals. The Relation of 



Leucocytes to Immunity 8 



Bordet. 



III. Studies on the Serum of Vaccinated Animals. Pfeiffer's 



phenomenon 56 



Bordet. 



IV. On the Mode of Action of Preventive Sera 81 



Bordet. 



V. A Contribution to the Study of Antistreptococcus Serum 104 



Bordet. 



VI. On the Agglutination and Dissolution of Red Blood Cells by the 



Serum of Animals Injected with Defibrinated Blood 134 



Bordet. 



VII. The Mechanism of Agglutination 142 



V-- 



Bordet. 



VIII. The Agglutination and Dissolution of Red Blood Cells by Serum 



(Second Memoir) 165 



Bordet. 



IX. Hemolytic Sera and Their Antitoxins; and Theories Concerning 



Cytolytic Sera in General 1S6 



Bordet. 



v 



