INDEX 



02l 



Chemical analysis of water from i 

 river Ouse before and after sand 

 filtration, 118 



of water before and after fil- 

 tration through coke, also animal 

 charcoal, 171 



— effect on water, by filtration 

 through Chamberland filter, 172 



— precipitation, effect of, on sew- 

 age bacteria, 205-216 



Chemicals, cost of, for sewage puri- 

 fication, 210 

 Cholera bacillus {Comma bacillus 

 or Spirillum cholerae asiaticae), 

 399 

 Cholera bacillus, growth on pota- 

 toes of, 23 



and sand filtration, 158 



and Berkefeld filter, 177, 178 



and high temperature, 184 



behaviotu' in ice of, 254, 255 



— — detection in water of, 276- 

 283 



inoculation of, into guinea- 

 pigs and marmots, 282, 399 



behaviour in carbonic-acid 



gas of, 237 



— discovery in water of, 262- 



264 



action of peroxide of hydro- 

 gen on, in water, 246 



behaviour of, in water in 



presence of various salts, 301- 

 306 



action of light on, 372, 386- 



388 



insolation and virulence of, 



386-388 



vitality in water of, 296-309 



microscopic figure of, 296 



spirilla found in water re- 

 sembling, 283, 400-403 



Cholera and Hamburg water supply, 

 152-154,305,306 



Altona water supply, 152-154 



Cholera-red-reaction, 281 



Cholerse gahinarum b, vitality of, in 

 water, 324, 329 



Choleroides a, B., 401 



Choleroides /3, B., 402 



Cinnahareus, M., 496 



Circulans, B.^ 436 



Citreus, M., 499 



Cladothrix, 513 



Cladothrix dichotoma, 514, 515 



Cladothrix invulnerabilis^ 516 



— intricata, 517 



Clark's process for softening water, 



185, 190, 191, 196 

 Clay, potter's, agitation of water 



with, 198 

 Cloacae^ B., 433 

 Caeruleus, B., 474 

 Cohn, Culture solution, 26 

 Coke, the filtration of water through, 



169-171 



— agitation of water with, 195, 

 200 



Coli cotriTnunis, B., 411 



discovery in mud of, 259, 260 



presence with typhoid in 



water of, 268 



— — diagnosis of typhoid in pre- 

 sence of, 268-276 



production of gas by, 269, 270 



action of light on, 371 



Concentricum, Spirillum^, 408 



Concentricus, M.^ 495 



Constrictus, B., 484 



Copperas, purification of sewage 

 with hme and, 206, 207 



Cotton-wool, sterihsation of, 11 



multiplication of bacteria in 



vessels plugged with, 234, 235 



Counting bacteria, apparatus for, 

 34, 76-79 



Cover glasses, cleaning of, 50 



Cover-glass preparations, 50-52 



Crassus aroviaticus, B., 480 



Cremoides, M., 500 



Crenothrix, 511 



Crenothrix KUhniana, 512 



Culture media, 6-28 



action of hght on, 345-347, 



349, 355, 356, 358, 359 



use of special, in water ex- 

 aminations, 63-73 



liquid, 24-28 



Pasteur's, 26 



_ Cohn's, 26 



Naegeli's, 26 



. Percy Frankland's, 26, 27 



Warington's, 27 



Uschinsky's, 28 



soKd, 7-24 



— — amount of sulphur normally 

 present in, 16 



Cu/niculicida, B., 429 



and septicaemia, 258 



vitaHty of, in water, 323 



