Subject Index. 



253 



Bacteria Continued. 

 on the hands, 30. 

 paratrophic, 2. 

 prototrophic, 2, 25. 

 seasonal variation, 7, 8. 

 significance of high numbers of, 



173- 



subsidence of, 14. 

 Bacterial analyses, value of, 54. 



correct relation to contamina- 

 tion, 9. 



correct relation to stream flow, 9. 



examination, significance of, 170. 

 Bacteriological examination, ap- 

 plicability of, 170. 



examination, certainty of, 179. 



examination, delicacy of, 176. 



examination, directness of, 1 76. 

 Bile, as enrichment medium, 76. 

 Bile-salt broth, 92. 

 Bile salts, 146. 

 Bleaching powder, 107. 

 Body temperature count, 57, 173. 

 Body temperature count, signifi- 

 cance of, 57. 

 Broth, 207. 



neutral red, 215. 



sugar, 207. 



Caffeine fuchsin agar, 70. 



inhibitory action of, 71. 



nutrose medium, 71. 

 Calcium hypochlorite, 198. 

 Chemical disinfection, 198. 



examination of water, 171. 



precipitation for typhoid isola- 

 tion, 74, 75. 



Cholera bacillus, isolation of, from 

 water, 83. 



Koch's method, 83. 



Cholera red reaction, 83. 

 Chromogenic organisms in wells, 



24. 



Cold, effect of, 17. 

 Cold, effect of, on typhoid bacilli, 



ty 



Collodion sacs, 16. 



Colon bacilli, atypical, 102. 



bacilli on plants, 118. 



bacillus, 86, 101. 



colonies on litmus-lactose-agar, 



99- 



diagnostic characters of, 103. 

 distribution of, 112. 

 gas ratio of, 105. 

 growth on Drigalski-Conradi 



medium, 70. 

 isolation of, 86, 98. 

 group, 165. 



group, fermentative power of, 87. 

 group, sub-types, 87. 

 Colon -like organisms, 102. 

 test, dilutions for, 95. 

 test in large samples, 96. 

 test, 24-hour incubation, 97. 

 test, use of i c.c. samples, 96. 

 typhoid group, 163. 

 Comparative growths, Nahrstoff 



agar and peptone agar, 27. 

 Confirmatory tests for B. coli, 



107. 

 Comparison of sand filters and 



mechanical filters, 54. 

 Composition as effected by sterili- 

 zation, 39. 



of medium, effect of, 39. 

 of water, effect of, 40. 

 Composition of glass, importance 



of, 40. 

 Concentration methods, 69. 



