SUBJECT INDEX. 



PAOB 



Absorption of CO, 70 



Acid formers in Boston sewage 45 



production by B. subtilis 45 



Acidity of media 29 ^ 



Agar media 30 



plate count 44 r+* 



preparation of 120, 121 Q 



streak, types of growth 67 ' 



Agglutination 53 



Air, dust in 7 2S 



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



30, 31, II 9 , 120 ^ 



Amines, formation of by B. coli 66 * 



Ammonia, formation of by B. coli 66 



Ammonium compounds, decomposition of 5 * 



Antagonism 12 



Bacillus aerogenes 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 ofj in presence of streptococci 104 



