350 



INDEX 



Bacteria, spores of, 64, 74 



,, stages of action, 100, 272 

 Bacterial efficiency, testing, 68 



,, samples, 61 

 Bacteriolysis, 96 {see also Hydrolysis and 



Nitrification) 

 Bacterium sulphureum, 73 

 Ballast, 210, 227 

 Baltimore, 295 

 Barking filter, 98, 211 

 Barrhead installation, 262, 315 

 " Battage " of grease, 338 

 Beggiatoa alba, 73, 78 

 Berlin sewage farms, 135, 139 



,, Sewerage Commission, 202 



,, street sweepings, 200 

 Belfast, 80, 222 

 Berg6 process, 192 

 Bichromate liquors, 335 

 Birmingham, sewage disposal at, 155, 165 

 Bleach liquor, 183, 334 

 Bleaching powder, 180, 183 

 Blood-heat organisms, 64 

 Bradford, sewage disposal at, 166 



,, wool-scouring refuse, 336, 339 

 Brent, use of chloride of lime on, 181 

 Biewery waste, 341 

 Brighton, 170 



Broad irrigation {see Irrigation) 

 Burning, disposal by, i, 154, 198 

 Burton-on-Trent, 141 

 Bury, dust disposal, 198 

 By-laws, 8, 55, 347 



Calcutta se^3ige, footnote, 134, 332 



Cameron's alternating gear, 259, 286 



Candy-Caink sprinkler, 294 



Capacity of beds. 213, 226, 233 



Carbohydrates, decomposition of, no, 113 



Carbonaceous iron sand, 229 



Carbonic acid in sewage and effluents, 51, 



75 

 ,, ,, in air of filters, 125, 234 



Carchesium lachmanni, 80 

 Carriage of sewage and refuse by 

 carts, 6, 196 

 ,, ,, pneumatic tubes, 195 



>• •• water, 4, 7, 13 



Cassell process, 196 



Catalytic theory of putrefaction, 202, 211 

 Catch-pits, 7, 345 

 Catchwater system, 143 

 Caterham works, 91, 252 

 Cellulose, 113, 215 



,, hydrolysis of, no, 117 

 Centrifugal method for solids, 34 

 Cesspits, 10 

 Cesspools, 2, 3, 8, 206 

 Chalk for earth closets, 11 

 ,, as a filtering medium, 246 

 ,, infiltration through, 8, 136 

 Chemical precipitation, 155 

 ,, sterilization, 168 

 Chemicals injurious to plants, 147 

 Chichester, 83, 84 

 Chloride of lime, 180, 183 

 Chlorine and its compounds as disinfectors, 

 87, 179-192 

 ,, as measuring strength of sewage, 



13. 35. 145 

 ,, as a finisher, 87 

 ,, determination of, 34 



Chlorine ratio to nitrogen, 58 



,, loss of, 125, 181, 189 

 Chloros, 181 

 Chlorates, 192 



Cholera organisms, 192, 193 

 Cinders as filtering material, 234 

 Cladothrix, 78, 84 

 Clarification, 11, 153, 210 

 Clarine, 158 



Claybury, bacterial treatment at, 272 

 Clay soils, 133, 136 

 Clinker as a filtering medium, 228 

 Closets, dry, 8 



,, earth, 11 



,, water, 12 

 Clostridium butyricum and foetidum, 73, 



75» 113 

 Coal as a filtering medium, 226 

 Coarse filters, 227, 232, 240 

 Coke beds, 210, 212, 227 

 Cold, influence on purification, 242 

 Coli {see B. coli communis) 

 Collection of samples. Chapter II. 



,, ,, bacterial, 61 



Colloids, 223 

 Colonies of bacteria, 62 

 Columbus, Ohio, investigations, 208, 264 

 Combined system of sewerage, 150, 162, 312 

 Combustion of excreta, i 



,, sewage gases, 116, 117 



town refuse, 198 

 Commissions on sewage, 19, 34, 47, 55, 85, 



168, 171, 202, 203, 347 

 Conservancy systems, 9, 11 

 Contact beds, 189, 210 

 Continuous filtration, 280 

 Copperas, 158, 159 



Copper salts for sewage treatment, 174 

 Corrosion of fittings, 182 

 Cosham's tank, 163 

 Cost of purification, 168, 194 

 Counting bacteria, 63. 71 

 Cremation of effete matters, i, 154, 198 

 Crenothrix, 78, 82, 161, 308 

 Cultivation tanks {see Septic tanks) 

 Culture media, 62, 67, 114 

 Cultures, anaerobic, 64 



,, plate, 62 



,, stab and streak, 65 



,, surface, 66, 72 

 Cytase, 104^ 113 



Dejecta, burning, i 



,, covering by earth, i, 2 



,, quantities and manurial value, 40, 

 331 



,, removal by screening {see Screen- 

 ing) 

 Delattre process for grease recovery, 337 

 Denitrification, 125, 231, 251 



by soil, 133 

 Depth of filters, 213 



Derbyshire County Council standards, 55 

 Destructors, 154, 199-201 

 Detritus, road, composition of, 6, 7, 200 



,, tanks, 23, 253 

 Detroit, water-borne typhoid of, 4 

 Diastase, 104, 113 

 Dibdin beds, 71, 75, 221 

 Dibdin's experiments, 206, 217 



,, fish lest, 56 

 Digby process, 191 



