1 TABLE OF CONTENTS. 



PAGE 



3. — Description of Genera and Species .... 65 



Spherobacteria 71 



Micrococcus 72 



Monads 78 



Microbacteria 80 



Bacterium 80 



Desmobacteria '• 86 



Bacillus 87 



Leptothrix 90 



Spirobacteria 91 



Vibrio 92 



Spirillum ' 94 



PART SECOND. 



PHYSIOLOGY OF THE BACTERIA. 



CHAPTER I. — Development in General. 



§ 1. — Origin of Bacteria 101 



Heterogenesis 102 



Dissemination 103 



In Air 103 



In Water 106 



In the Human. Organism 107 



§ 2. — Nutrition and Respiration Ill 



Aliments : Water Ill 



Nitrogen 112 



Carbon 113 



Oxygen 115 



Temperature 118 



Other Agents 121 



§ 3. — Reproduction 123 



Fission 123 



Spores 126 



Sporangia 130 



Polymorphism 133 



