CONTENTS 7 



CHAPTER XV PAGE 



Diphtheria 95 



CHAPTER XVI 



Tetanus 101 



CHAPTER XVII 

 The Pneumococcus 104 



CHAPTER XVIII 



Streptococcus Infections 108 



CHAPTER XIX 



Staphylococcus Infections Ill 



CHAPTER XX 

 The Meningococcus 114 



CHAPTER XXI 

 The Gonococcus 117 



CHAPTER XXII 



Syphilis 119 



CHAPTER XXIII 



Ex.\nthemata 122 



Scarlet Fever 122 



Measles and German Measles 123 



Small-pox and Cow-pox 124 



CHAPTER XXIV 



Filterable Viruses 126 



CHAPTER XXV 



Malaria 128 



Mosquitoes 130 



Yellow Fever 132 



Trypanosomiasis 133 



