SUBJECT INDEX 



Acid forming organisms, 60. 



in polluted waters, 60. 

 Agar, 204, 208, 209. 

 Agar streaks, 100. 

 Agglutination, 72. 

 Agglutination, effective dilution 



for typhoid isolation, 73. 

 Agglutination methods, 69. 

 American sewages, 188. 

 Anaerobic bacilli, 161. 

 Anaerobic bacteria, 169. 

 Animal inoculation, 116. 

 Antagonism, 16. 

 Arbitrary standards, 46, 47. 

 Atmospheric waters, 6. 

 Atypical colon bacilli, 102, 166. 

 Atypical forms, 100. 

 Atypical gas formation, 97. 

 Atypical gas ratio, 142. 



Bacilli, anaerobic, 161. 

 Bacillus alcaligenes, 163. 

 Bacillus anthracis. 



isolation of, from water, 84. 

 Bacillus cloacae, 168. 

 Bacillus, coli, 86, 163. 



action on aldehydic and ketonic 

 sugars, 88. 



action on litmus-lactose-agar, 88. 



agar streak of, 100. 



and streptococci, detection of, 

 158- 



Bacillus, coli , Continued 



and streptococci, relation to 

 sewage pollution, 158. 



B. coli and streptococci, relative 

 growth of, in dextrose broth, 156, 



157- 

 as criterion of self-purification, 



122. 



as index of B. typhi, 136. 

 as index of sewage pollution, 



124. 

 as measure of, fecal pollution, 



139- 

 as test for fecal contamination, 



175- 



as test organism for filters, 134. 

 confirmatory tests of, 107. 

 diagnostic characters of, 103. 

 distribution, 112. 

 fermentative power of, 87. 

 gas formation by, 90. 

 gas ratio of, 105, 141. 

 importance of number in water, 



i3 8 > 139- 



importance of number of, 120. 



in animals, 112, 113. 



in bottled waters, 132. 



incubation of at high tempera- 

 tures, 94. 



in Chicago drainage canal, 125. 



in ground waters, 131. 



in Harrisburg filter effluent, 135. 



251 



