INDEX. 



I 99 



V. 



Vaccination, 176 



Variation among bacteria, 35. 



Vinegar, 51. 



Virulence of pathogenic germs, 140, 



143- 

 Vis medicatrix naturae, 187. 



W. 



Wine, bacteria in manufacture of, 

 Y. 



Yellow milk, 72. 

 Zoogloea, 24. 



Z. 



(3) 



