524 



MICEO-ORGANISMS IN WATER 



Cutictilarisj B., 476 

 Cuticularis alhus, £., 442 

 Cyaneus, M., 495 



'D ' {Bacillus), 476 



Decolorisation of preparations, 47 



Dee, river, bacteria in, 100-102 



DelicatuluSj £., 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 



DevoranSi -B., 471 



Dialyzed sihcic 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 andhigh tempera- 

 tures, 184 



Distilled water, growth of organisms 

 in, 217, 231-233 



action of ozone on anthrax in, 



243 



Double staining, 53 



Giinther's method of, 53 



Fiocca's method of, 54 



Dram-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 Berkef eld- 

 filter) 



— — agitation of water with, 198 



Ehrhch's solution, 45 



Loffler's modification of, 46 



Weigert-Koch's modification 



of, 46 



*■ JSine neue Vibrionenart,' 402 



Electric light, action on bacteria of, 

 354,357,368 



Erysipelas streptococcus, vitality of, 

 in water, 321 



Erythrosportos, B., 439 



Erythrosporus, B., multipUcation 



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 



Ziirich, 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 on 



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, 154r-159, 169, 



170 



— ~ chemical effect on water of, 

 118 



