xii CONTENTS. 



CHAPTER XXII. 



PAGE 



The spirillum (comma bacillus) of Asiatic cholera— Its morphologi- 

 cal and cultural peculiarities— Pathogenic properties— The bacterio- 

 logical diagnosis of Asiatic cholera 365-393 



CHAPTEE XXIII. 



Organisms of interest, historically and otherwise, that have been 

 confounded with the spirillum of Asiatic cholera— Their peculiari- 

 ties and diflferential features— Fiftrio proteus, or bacillus of Finliler 

 and Pnoi—Spirillum tyrogenum, or cheese spirillum of Deneke— The 

 spirillum of Miller— Vibrio Melchnikovi 394-411 



CHAPTER XXIV. 



study of bacillus anthracis, and the effects produced by its in- 

 oculation into animals^Peculiarities of the organism under varying 

 conditions of surroundings 412-427 



CHAPTER XXV. 



The most important of the organisms found in the soil— The nitri- 

 fying bacteria— The bacillus of tetanus— The bacillus of malignant 

 CEdema— The bacillus of symptomatic anthrax . . . . . 428-452 



CHAPTER XXVI. 



Infection and immunity— The types of infection ; intimate nature 

 of Infection— Septicaemia, toxaemia, variations in infectious pro- 

 cesses—Immunity, natural and acquired— The hypotheses that have 

 been advanced in explanation of immunity— Conclusions . . , 453-483 



CHAPTER XXVII. 



Bacteriological study of water— Methods employed— Precautions 

 to be observed— Apparatus used, and methods of using them— 

 Methods of investigating air and soil 484-511 



CHAPTER XXVIII. 



Methods of testing disinfectants and antiseptics— Experiments 

 Illustrating the precautions to be taken— Experiments in skin-dis- 

 infection 512-525 



APPENDIX. 



Apparatus necessary in a beginner's bacteriological laboratory . 527-532 



