SUBJECT INDEX 



3i; 



Shallow wells, body temperature 



count in, 67. 

 Shellfish and disease, 244. 



bacteriological examination of, 

 248, 251. 



bacteria in shucked, 254. 



careless handling of, 253. 



colon bacilli in, 252. 



self -purification of, 252. 



standards of interpretation, 264. 



streptococci in, 252. 

 Shell water, examination of, 251; 

 Significance of 37° count, 62. 

 Specific sewage organisms, tests 



for, 230. 

 Springs, bacteria in, 26. 

 Standard methods, 32, ss> 4i- 



necessity of, 45. 

 Standard reaction, 268. 

 Standards for sewage effluents, 



239. 

 Staphylococci in sewage, 202. 

 Storage, effectiveness of, 25. 



effect of on bacteria, 10, 21. 



effect of duration of, 23. 



effect on lactose fermenters, 115. 

 Storage of samples, effect of, 37. 

 Stored waters, 6. 

 Streptococci, 64, 133. 



antagonism to colon bacilli, 208. 



comparative fermentations by, 

 210. 



from different animals, 209. 



in sewage, 202. 



in saliva, 204. 



in shellfish, 252. 



in polluted waters, 203. 



in stored sewage, 207. 



indicative of recent pollution, 

 207. 



index of pollution, 220. 



isolation of, 203. 



on animal bodies, 204. 



Streptococci, varieties of, 20S, 



209. 

 Streptococci, " lamiracsal," 210. 

 Streptococci, " larasacsal," 210. 

 Streptococcus equinus, 209. 

 Sugar broths, preparation of, 269. 

 Sugar reactions, 1 79. 

 Sugars, action of bacteria on, 102. 

 Surface waters, 5. 



bacterial content of, 54. 

 Swimming pools, bacteria in, 72. 

 Synthetic media, 130. 



Temperature, effect on B. coli, 113. 



effect on bacteria in water, 20. 



effect on fermentation test, 112. 

 Temporary pollution, detection of, 



225. 

 Titration of culture media, 267. 

 Toxic products, effect of, 15. 

 Trickling filters, 235. 

 T\-phoid, occurrence in cold 



weather, 22. 

 T>-phoid and shellfish, 245. 

 Typhoid bacilli, agglutination of, 

 81, 82, 83. 



artificial infection of water 

 with, 24. 



developing on malachite green 

 media, 77. 



effect of oxygen on, 19, 



enrichment in caffein media, 79. 



enrichment of, 75. 



examination of water for, 74. 



in polluted waters, 23. 



in pure culture, 16. 



in tap water, 24. 



in unsterilized waters, 23, 



isolation by lactose bile, 81. 



isolation of, 76. 



media for, 76, 77, 78, 79. 



precipitation of, 81, 83, 84. 



