SUBJECT INDEX. 149 



PAGE 



Bacillus coli, presumptive tests in various amounts of water 96 



, qualitative analysis for 69, 70 



, quantitative estimation of 35 , 82 



, relation to B. acidi lactici 80 



, significance of 112 



, 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 dysenteriae 53 



enteritidis sporogenes 106 



my coides 66 



, growth on agar streak 67 



sporogenes, as index of pollution 106 



, cultural characteristics 106, 107 



in sewage i°7 



, method for detection of, in water 106 



, significance of I°7 



typhi, biochemical characters of. 51 



, distribution in the environment 54 



in ice I2 



, 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 H 



fermenting lactose, in normal waters 4 6 , 48 



, in polluted waters 45) 48 



growing at body temperature 43 



in Boston tap-water 9> 3^ 



