SUBJECT INDEX. 



PAGE 



Absorption of CO 7° 



Acid formers in Boston sewage 45 



production by B. subtilis 45 



Acidity of media 29 



Agar media 3° 



plate count 44 



preparation of 120, 121 



streak, types of growth 67 



Agglutination 53 



Air, dust in 7 



American Public Health Association, standard procedure ... 19, 20, 28, 



30, 31, 119, 120 



Amines, formation of by B. coli 66 



Ammonia, formation of by B. coli 66 



Ammonium compounds, decomposition of 5 



Antagonism 12 



Bacillus serogenes 108 



anthracis, isolation from water 56 



cloacae 91, 92, 108 



coli, as a saprophyte 76 



, as direct evidence of sewage 58 



, atypical forms 68 



, biochemical characters 51, 58, 59 



, characteristics of. 67 



, colonies on agar 67 



, comparison of methods for isolation 61, 63 



, decomposition of sugars 44 



, detection of, in presence of streptococci 104 



*47 



