2S8 



Subject Index. 



Typhoid bacilli — Continued 

 bacilli, life in sewage, i6. 

 bacilli, life in sterile sewage, 



1 6. 

 bacilli, life in water, 15, 16. 

 bacilli, number of in polluted 



water, 82. 

 bacilli, persistence in mud, 21. 

 bacilli, persistence in sewage, 



21. 

 bacilli, persistence in water, 

 21. 



growth on Drigalski-Conradi 

 medium, 70. 

 bacillus, isolation of, 69. 

 bacillus, isolation with, caffeine 



agar, fuchsin agar, malchite- 



green agar, 70. 

 bacillus, positive isolation from 



water, 80, 81. 

 isolation by chemical precipita- 

 tion, 74, 75. 

 at Newport, R. I., 55. 



Unobjectionable aliens, 58. 

 Unpolluted waters, body temper- 

 ature count in, 60. 

 Urea, decomposition of, 3. 



Value of Bacterial analysis, 54. 

 Variation in biochemical tests, 

 no. 



Warmth, effect on colon bacilli in 



water, 17. 

 Warm weather, effect of, on inter- 

 pretation of results, 65. 

 Waste products, effect of, 37. 

 Water bacteria, increase during 



storage, 34, 35. 

 Waters, normal, 49. 

 Wells, B. coli in, 132, 133. 

 pollution of, 22, 23. 

 bacteria in, 23 52. 

 deep, 23. 

 Widal test, 8a 



