SUBJECT INDEX. 153 



PAGE 



Daily analyses, at Chicago, etc 41 



Danube River, distribution of sewage in 116 



Dedham tap-water, bacteria in 47 



Deep wells 15 



, bacteria in 17 



Depths below surface, taking samples from 24 



Desplaines River, B. coli in 89 



Dextrose broth, for enrichment of B. coli 61 



, method for isolation of B. coli 63 



, preparation of. 122 



Dilution of samples in plating 28 



Distribution of bacteria in sea-water II 



water 6 



Diurnal variation in bacteria 14 



Dogs, B. coli in 74, 75 



Driven wells, bacteria in 40, 47 



Dust in air 7 



Egypt, cholera in 56 



Elbe River, cholera bacilli in 55 



Eisner's medium 54 



Enrichment culture, for B. typhi 49 



processes, disadvantage of. 50 



process, effect upon B. coli 50 



Environment, effect of 14 



Esmarch process 34 



Examination of spring waters for B. coli 88 



Feces, streptococci in 101 



Fermentation, characteristic gas formula of B. coli 75 



, gas formula of B. coli 95 



of sugars by B. subtilis 45 



, variations in 73 



Field, plating in 34 



Filter effluent, B. coli in 86, 87 



Filtration of water 40 



Fishes, B. coli in 75, 76 



Food supply, effect of, upon bacteria II, 14 



Fowls, B. coli in 75 



Fox River, B. coli in 90 



