524 



MICROORGANISMS IN WATER 



Cuticularis, B., 476 

 Cuticularis albus, B., 442 

 Cyaneus, M., 495 



'D' (Bacillus), 476 



Decolorisation of preparations, 47 



Dee, river, bacteria in, 100-102 



Delicatulus, B., 438 



Dentriticus, B., 475 



Depths of water, bacteria in various, 

 110, 113, 114 



- insolation of bacteria in 

 various, 372, 374, 375 



Desiccation, effect of, on anthrax, 

 363-367 



Devorans, J9., 471 



Dialyzed silicic acid, preparation of, 

 17 



Diffusus, B., 471 



Dilution method, isolation of bac- 

 teria by, 28 



numerical estimation of bac- 

 teria in water by, 73 



Diphtheria bacilli and high tempera- 

 tures, 184 



Distilled water, growth of organisms 

 in, 217, 231-233 



action of ozone on anthrax in, 

 243 



Double staining, 53 



Gunther's method of, 53 



Fiocca's method of, 54 

 Drain-water, action of light on 



bacteria in, 374, 375 

 Drop-cultures, 58, 59 

 action of light on anthrax in, 



349 

 Dundee water supply, 111 



Earth, infusorial (see Berkefeld- 



filter) 



agitation of water with, 198 

 Ehrlich's solution, 45 

 Loffler's modification of, 46 

 - Weigert-Koch's modification 



of, 46 



Mine neue Vibrioncnart,' 402 

 Electric light, action on bacteria of, 



354, 357,358 

 Erysipelas streptococcus, vitality of, 



in water, 321 

 Erythrosporus, B., 439 



Erythrosporus, B., multiplication 



in water of, 231, 232 

 Esmarch tube -cultures, 35 



Ferric salts, purification of sewage 

 with, 208 



Fervidosus, M., 500 



Filiformis, B., 470 



Filter-beds, renewal of, 127, 144- 

 146 



London Companies', exami- 

 nation of, 131-142 



- Zurich, examination of, 144- 

 147 



covered and uncovered, 145 



construction of, at Konigs- 

 berg, 148 



frost and, 153 



Filters, domestic, Berkefeld. 5. 

 176-180 



- Chamberland, 4, 172-176 



Chemical effect on water 

 by passing through Chamber- 

 land filter, 172 



effect of temperature 011 

 efficiency of, 174 



retention of typhoid bacillus 

 by, 175-181 



retention of cholera bacillus 

 by, 177, 178 



- stone, 181 



asbestos, 181 



Filtration of water through silver- 

 sand, 169-171 



green sand, 169-171 



coke, 169-171 



- powdered glass, 169-171 



- brick-dust, 169-171 



iron sponge, 169-171 



animal charcoal, 169-171 



vegetable charcoal, 169- 

 171 



- Chamberland filter, 172- 

 176 



and detection of ty- 

 phoid bacillus by, 285 



- Berkefeld filter, 176-180 



- stone filters, 181 



asbestos filters, 181 

 Filtration, sand, 117-154 



experimental. 154-159, 169, 

 170 



chemical effect on water of, 

 118 



