368 



INDEX 



265; against hog cholera, 334; 



against rabies, 315; against 



Texas fever, 299 

 Vaccines, 246 

 Vinegar, 196 

 Virus, filterable, 23 

 Vitamines, 181 



Water, ground, salts in, 87; 

 microorganisms in, 63 ; puri- 

 fication of, 169; supplies, con- 

 tamination of, 160 



Weigert, 10 



Wells, protection of, 161 



Whey, contamination of milk 



from, 149; heating of, 149 

 White diarrhea, 344 

 Wilfarth, 122 

 Wilts, 349 



Yeasts, 193, 199; in soil, 75; 

 morphology of, 26; relation to 

 air, 53; relation to reaction, 

 53 ; reproduction of, 27 ; 

 spores of, 28 



Yoghurt, 190 



Zoogloea, 21 



