SUBJECT INDEX. 149 



PAGE 



Bacillus coli, presumptive tests in various amounts of water 96 



, qualita*-' ve analysis for 69, 70 



, quantitative estimation of 35, 82 



, relation to B. acidi lactici 80 



, significance of 1 12 



, significance of, in samples of different size 87 



, significance of, in water 74 



, standards for drinking water 85 



, standards for presumptive test 97 



, sub-cultures of, in qualitative analysis 70 



, susceptibility to phenol 59 



, time of gas-production in dextrose broth by 61 



, variations in cultural reactions 73 



, varieties of 68 



Bacillus dysenterise 53 



enteritidis sporogenes 106 



mycoides 66 



, growth on agar streak 67 



sporogenes, as index of pollution 106 



, cultural characteristics 106, 107 



in sewage 107 



, method for detection of, in water . . 106 



, significance of 107 



typhi, biochemical characters of. 51 



, distribution in the environment 54 



in ice 12 



, isolation of. 49 



, life of, in water 54 



Bacteria, classes of, in relation to nutrition 37 



, comparative numbers of, growing at 20 and 37 47 



, definition of species 67 



, developing on various media 30 



, distribution of . 3 



, distribution of, in sea-water 10 



, distribution in water ~6 



, diurnal variation 14 



fermenting lactose, in normal waters 46, 48 



, in polluted waters 45, 48 



growing at body temperature 43 



in Boston tap- water 9, 38 



