viii CONTENTS 



CHAPTER VI 



THE BACTERICIDAL SUBSTANCES OF THE BLOOD 



The Alexins 66 



Pfeiffer's Experiment 68 



The Leukins 76 



Offensive-defensive Mechanism in Infections with Necroparasites . . 77 



Offensive-defensive Mechanism in Infections with True Parasites . 78 



Offensive-defensive Mechanism in Infections with Semiparasites . . 81 



CHAPTER VII 

 ANTIGENS AND ANTIBODIES 



Allergia 87 



Antitoxins 88 



Bacteriolysins 90 



Agglutinins 91 



Precipitins 92 



Cytolysins 93 



Isocytolysins 96 



Auto-antibodies 96 



Immune Opsonins and Bacteriotropins 97 



Antiferments 98 



Antilipoids 99 



Albuminolysins 99 



Anaphylaxis 100 



CHAPTER VIII 



THE SIDE-CHAIN THEORY 



Formation of Antibodies 110 



CHAPTER IX 



THE DIFFERENT TYPES OF IMMUNITY 



Natural Immunity ( . 123 



Acquired Immunity 127 



Antitoxic Immunity 128 



Athreptic Immunity 130 



Antiaggressin Immunity 131 



Antibacterial Immunity 138 



CHAPTER X 

 ANAPHYLAXIS 



Richet's Studies 142 



The Phenomenon of Arthus 143 



Studies of v. Pirquet 143 



