160 SUBJECT INDEX. 



PAGE 



Sewage, streptococci in 62, 100, 101 



, typhoid bacillus in 51 



Shallow wells, bacteria in 15, 16 



Sheep, B. coli in 75 



Shiga bacillus 53 



Significance of B. coli 89 



in water 76 et seq., 93 



, necessity for quantitative results. ... 81 



of blood temperature count 43 



of quantitative analysis 38 



of streptococci in water 105 



Snow, bacteria in 8, 47 



Sodium taurocholate medium 98 



Specific pathogenes in polluted water 49 



Spirillum cholerae in Elbe River 55 



, isolation of 54, 55 



of Asiatic cholera, isolation from polluted water 49 



Spore-forming pathogenes in water, isolation of. 56 



Spring waters, multiplication of bacteria in , . . . . 16 



Springs, bacteria in 15, 16, 47 



Standard for interpreting presumptive test 97 



Sterilization of gelatine, effect of 30 



sample bottles 22 



Storage n 



, effect on sample 37 



, multiplication of bacteria during 25-27 



of polluted waters 27 



of samples, allowable maximum 28 



Strassburg, B. coli in water of 76 



Streams, bacteria in 39 



, sedimentation of bacteria in 1 1 



Streams, self-purification of. 8, 13 



Streptococci as indicative of pollution 100 



, colonies on litmus lactose agar 66 



, cultural characters 99 



, decomposition of sugars by 44 



, detection of, in presence of B. coli 104 



( growth on agar streak 67 



, habitat of 101 



