CONTENTS. Vll 



CHAPTER IV. 

 THE MICROBIAL TOXINS 



PAGE 



Pyogenic and pyre^ogenic properties 66 



Anthrax toxin 67 



Tubercular toxin 69 



Diphtheria toxin. . 71 



Tetanus toxin 76 



Mallein 79 



Typhoid toxin. . 80 



Cholera toxin 82 



CHAPTER V. 

 THE VENOMS. 



General nature of venoms 85 



Venomous serpents 87 



Nature of serpent- venoms. . .- 88 



Natural immunity towards serpent-venoms 90 



Artificial immunity towards serpent venoms. ... 91 



Venoms of batrachians and saurians 92 



Fish-poisons 95 



Poisons of the hymenoptera 96 



Poisons of scorpions , 97 



Poisonous blood and serums 9 8 



Poisonous meats . , 100 



