SUBJECT INDEX 



313 



Bacteriological examinations of 



water, significance of, 217. 

 Bacteriological methods for super- 

 vision of filtration plants, 227. 

 Bacteriological methods for super- 

 vision of water supplies, 227. 

 Bacteriological methods in detect- 

 ing sewage distribution, 226. 

 Bacteriology of sewage, 228. 

 Bacteriology of sewage eflSuents, 



228. 

 Bacteriology of sewage filters, 241. 

 Bacteriological examination, 220. 

 advantages of, 220. 

 certainty of, 223. 

 delicacy of, 221. 

 Bile, importance of, 127. 

 Bile media, 81, 122. 

 Bile salts, 122. 



selective action of, 123, 128. 



Body temperature count, 42, 61. 



relation to hot weather, 70. 



Caffein, selective action of, 80. 

 Calcium h\'pochlorite, 238. 

 Carbon dioxide, absorption of, 



117. 

 Chemical disinfection, 238. 

 Chlorine disinfection, relation to 



coimts, 72. 

 Cholera red reaction, 97. 

 Cholera spirillum, isolation from 

 water, 96. 



media for, 96. 

 Clams, 244, 263. 

 Cold, action of on bacteria, 21. 

 Colon bacilli, 64, 99. 



as index of pollution, 168. 



as index of self-purification, 



153- 

 atypical, 135, 177. 

 colonies of, 133. 

 comparisoft with B. t>phi, 87. 



Colon bacilli, distribution in 

 waters, 152. 



effect of temperature on, 22. 



" flaginac," 185. 



importance of numbers, 149. 



increased survival in cold 

 weather, 22. 



in cultivated soil, 170. 



in dust, 148. 



in filter effluents, 166. 



in filtered waters, 163. 



in foods, J47. 



in fruits, 147. 



in grains, 146. 



in ground waters, 161. 



in sewage, 231. 



in sewage effluents, 231. 



in shallow wells, 162. 



in shellfish, 252. 



in soil, 148. 



in surface waters, 157. 



in unpolluted waters, 155. 



isolation of, 104. 



isolation by bile media, 122. 



on plants, 146. 



standard tests for, 115. 



" t>pical," 176. 



ubiquity of, 143. 



varieties of, 174. 



viability at different tempera- 

 tures, 128. 

 Colon group, 99. 



characteristics, 104. 



distribution in water, 185. 



Jackson's classification of, 192. 



McConkey's classification of, 

 189. 



statistical classification, 198. 



tests for, 174. 



variations in, 181. 

 Colon test, loi. 

 Colon typhoid group, 94. 



reactions of, 95. 



