SUBJECT INDEX. 151 



PAGE 



Bacteria in surface wash 8 



in surface waters 9 



in Taunton supply 10 



in Thames River 9 



in Wakefield supply 10 



in water, relation to organic matter 37, 38, in 



, significance of number of 38 



in well water, effect of pumping on 23 



, intestinal 99 



f liquefying 108 



, metabolism of 4 



, multiplication of, in spring water 16 



, peculiar groups in ground water 18, 39 



, reduction of, in streams 8 



, relation to environment.^ 3, 14 



organic matter in water 6 



waste materials 4 



, seasonal distribution in surface waters 9 



which do not grow on ordinary media 19 



Bacterial standards for filter plants 41 



Bacteriological analyses, value of 41 



analysis of water, certainty of 42, 115 



, comparison with chemical 113 



, delicacy of 113 



, directness of 1 13 



, distribution of sewage in water. . . 116 



ground waters 113, 114, 115 



examination of water, applicability of. 116 



Berkefeld filter to concentrate organisms 50 



Biochemical characters of B. coli 51 



Blood serum, preparation of. . 125 



Body temperature, count, Boston sewage 45 



, Charles River 45 



of various samples 47 



, polluted water 45 



, significance of 112 



organisms growing at 43 



Boston, B. spor6genes in sewage 107 



, bacteria in deep wells 17 



r course of sewage in harbor. 116 



