314 



SUBJECT INDEX 



Comparison of sand and mechan- 

 ical filters, 58. 

 Composition of medium, impor- 

 tance of, 43. 

 Confirmatory tests, 136. 

 Conradi-Drigalski medium, 76. 



for B. coli, 106. 



preparation of, 275. 

 Contact beds, 235. 

 Counting, 48. 

 Crystal violet, 76. 

 Culture media, ingredients for, 

 265. 



preparation of, 265. 



reaction of, 267. 



sterilization of, 266. 



titration of, 267. 



uniform methods for, 265. 



Deep wells, bacteria in, 27. 

 Dextrose broth, 107. 



advantages of, 108. 



comparison with lactose bile, 

 125. 



disadvantages of, 108. 

 Dextrose test, failure of, 116. 

 Diluting samples, 40. 

 Disinfection of sewage, 237. 

 Disinfection of sewage effluents, 



237- 

 Distribution of types of colon 



group in waters, 184. 

 Division of colon group, 174. 

 Dunham's solution, 97. 

 Dysentery, spread by water, 95. 



Eijkman test, 120. 

 Endo medium, 76. 



for B. coli, 106. 



preparation of, 276. 

 Examination of shellfish, standard 



methods for, 255, 257. 

 Examination of shell water, 251. 



Expression of quantitative re- 

 sults, 49. 



Fermentation of lactose, 114. 

 Fermentation test, 105, 109, 179. 



effect of temperature on, 112. 



exceptions to, iii. 



interpretation of , no. 

 Field kits, 49. 

 Field methods, 50. 

 Filter plants, routine control of, 



230. 

 Filtered waters, bacteria in, 57. 

 Filtration in Japan, 58. 

 " Flaginac " B. coli, 185. 

 Food supply, importance of, 20. 



Gartner bacillus, 95. 

 Gas-forming bacteria, growth in 



liver broth, 131. 

 Gas production in vacuo, 118. 

 Gas ratio, 100, 109. 



effect of age on, 117. 



unreliability of, 118. 

 Gelatin liquefaction, 177. 

 Gelatin plates, use of, 41. 

 Gelatin, preparation of, 270. 

 Green plants, food requirements, 



3. 

 Ground waters, 6. 

 bacterial content of, 56. 

 B. coli in, 113. 



Hesse medium, 78. 



drying of, 78. 



preparation of, 275. 

 High temperatures, significance 



of, 69. 

 Hiss agar medium, 78. 



preparation of, 277. 

 Hog cholera bacillus, 94. 



Incubation, 46, 280. 



