Vaccination, 176. 



INDEX. 199 



W. 



Wine, bacteria in manufacture of, 



Variation among bacteria, 35. 50. 



Vinegar, 51. Y. 



Virulence of pathogenic germs, 140, I Yellow milk, 72. 



Vis inedicatrix naturae, 187. I Zougloea, 24. 



(16) 



