SUBJECT INDEX. I S3 



PAGE 



Daily analyses, at Chicago, etc 41 



Danube River, distribution of sewage in 116 



Dedham tap-water, bacteria in 47 



Deep wells IS 



, 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 11 



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 5 6 



Elbe River, cholera bacilli in 55 



Eisner's medium 54 



Enrichment culture, for B. typhi 49 



processes, disadvantage of. 5° 



process, effect upon B. coli 5° 



Environment, effect of 14 



Esmarch process 34 



Examination of spring waters for B. coli 88 



Feces, streptococci in Id 



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 4° 



Fishes, B. coli in 75. 7 6 



Food supply, effect of, upon bacteria II, 14 



Fowls, B. coli in 75 



Fox River, B. coli in 9° 



