154 SUBJECT INDEX. 



PAGE 



Framingham supply, bacteria in 42 



Freezing of bacteria 12 



Gas formula 95 



Gas measurement, in fermentation tube 70 



Gasometer 70 



Gas production in dextrose broth by B. coli, time of 61 



Gelatin 119, 121 



, liquefaction of 71 



media 30 



, physical condition of. 30 



Glycerin, agar, preparation of. 122 



Glycerin media 30 



Goats, B. coli in 74, 75 



Ground waters 15 



, bacteria in 39 



, bacteriological analysis of 1 13, 114, 115 



, character of bacteria in 18, 39 



Hamburg, cholera epidemic 55 



Hartford supply, bacteria in 42 



Hogs, B. coli in 74, 75 



Horses, B. coli in 74, 75 



Hudson River, B. coli in 83 



Ice, bacteria in 12 



Illinois River n 



, B. coli in 90 



, distribution of sewage in 117 



Incubation, conditions of 31 



of agar plates at body temperature 44 



, period of 31, 32 



Indol reaction 55 



test 71 



Interpretation of analyses 117 



Interval between sampling and examination 28 



Intestinal bacteria 99 



Isar. River, bacteria in 13, 14, 39 



Isolation of B. coli, Chicago methods 89 



, definition of species. 67 



