INDEX 



351 



Dilution by subsoil water, 145, 311 

 ,, calculation of, 35 

 , , effects of, 14 



methods for bacteria, 61, 72 

 Discharge into rivers, 4, 14, 169, 310 

 ,, into the sea, 19, 20, 317 



into tidal estuaries, 19, 170, 319 

 Disinfection of sevvage and excreta {see 

 Sterilization) 

 ,, by chlorine, 182 



Distribution on beds, 283 



,, over land, 141 



Distributors, 282-308 

 Dortmund tank, 163 

 Double treatment, 216, 231 

 Dover's process, 155 

 Drainage waters from farms, 5, 8, 149 

 Dry-rot, in 

 Dublin, 20, 316 

 Ducat's filler, 87, 236, 240 

 Dust collection, 6, 196 

 ,, destructors, 199, 201 

 ,, methods of disposal, 196 

 ,, use of screened for beds, 223 

 Dye-water, 334 



Earth closets, 11 



,, committal to, i, 11, 132 

 Electrolytic processes, 184 

 Electrozone, 185 - — "^ 



Energy produced by bacterial changes, 116 

 Enteric {see Typhoid) 

 Enteritidis bacillus {see B. enteritidis) 

 Enzymes, 102, 143 

 Essen tank, 163 

 Estuaries, 19, 170, 317 

 Excreta, burning, i, 198 



,, chemical treatment, 187 



,, nature of, 5, 40, 331 



primitive disposal of, i 



,, removal in scavenging, 11 



,, weights per day per person, 40, 54 

 Exeter sewage treatment at, 18, 86, 254 

 Exothermic change, 116 



Facultative aerobes and anaerobes, 65, 72 

 Faeces, 5, 11, 40, 54, 99, 187, 331 

 Farm pollution, 5 

 Farms, sewage {see Sewage farms) 

 Farrer's distributor, 306 

 Fats, decomposition of, 98, 113 

 ,, removal of, 265 

 ,, utilization, 336 

 Fatty acids, 80, 98, 109, iii, 337 

 Ferments and fermentations. Chap. V, 

 Ferric and ferrous salts, 157, 158, 176 

 Ferrous sulphide {see Sulphuretted hydro- 

 gen) 

 Ferrozone, 158 

 Fibre, resolution of, no 

 Fiddian distributor, 304 

 Filter presses, 154 

 Filters, aerating, 240 



,, capacity of, 226 



,, contact, 243 



,, continuous, 244 



,, distribution on {see Distributors) 



,, gases in, 125, 234 



,, materials for, 227, 248 



,, oxidizing, 206, 240 



,, roughing or straining, 28, 152 



Filters, zonal, 75, 91, 268 

 Filtration areas, 147, 207 



, , through land, 93, Chap. IV. 

 ,, upward, 249 

 Finishers, 87, 175, 194 

 Fish test for effluents, 56, 215 

 ,, as conveying coli, 92 

 ,, injury to, by sewage, 319, 334 

 Fisheries, contamination of, 170 

 Flies, infection by, 14 

 Float method of gauging, 20, 22 

 Flow, gauging the, 22, 23 

 ,, regulation of, 282, 311 

 ,, variations of, 28, 312 

 Foreshores, 19, 80, 170, 318 

 Formulae : Mouras' Scavenger, 205 

 ,, discharge of sewage, 16 



,, ratio of CI to N, 58 



,, volume of subsoil water, 145 



,, V-notch, 23 



,, weirs, 22 



France, pneumatic emptying of cesspools, 4 

 , , pollution of river Seine near Paris, 4 

 , , Roubaix method of extracting waste 



wool fat, 337 

 ,, treatment of Paris sewage, 143 

 Frankfort sewage sludge, 337 

 Friern Barnet, 228 

 Frost, effect on purification, 208, 242, 265, 



275 

 Fungi, 78, 103, no 

 Furnaces for refuse, 199 



Garfield filter, 227 



Gas in cesspools, 2 



Gas from sewage, utilization of, 115, 259 



Gas-liquor, 342, 345 



Gases from refuse, 200 



,, produced by bacteria, 65, 97, 106, 

 Chap. V. 



,, from tanks, 97, 115, 259 

 Gauging, 22 



Gayon and Dupetit reaction, 126, 220 

 Gelatine cultures, 62 



,, hydrolysis, 98, 102 

 Germany, sewage treatment in, 135, 139, 



143, 196, 202, 204, 223, 337 

 Germ theory of putrefaction, 202 

 Germicidal action. Chap. VIII., 168 

 Glasgow, sewage treatment at, 152 

 Glover's tank, 206 

 Glycerine, fermentation of, 113, 114 

 Glycocine (amido-acetic acid), 107 

 Gooch crucible, 33 



Goux-Thulasne method of disposal, 11 

 Grasses on sewage farms, 138 

 Gravel, 3, 7, 11, 210 

 Grease, 113 



,, traps, 151 

 ,, {see Utihzation) 

 Grit chambers, 28. 162, 261 



,, and detritus, 150 

 Guildford investigations, 73, 87, 185 



H 



Hagen's process, 194 

 Hampton, 224, 267 

 Hanging-drop cultivations, 69 

 Harriali grass, 135 

 Havana, sewage disinfection at, 185 

 Heat, evolved in bacterial changes, 116 

 ,, sterilization by, 195, 199 



