354 



INDEX 



Ribble Joint Board, 55 

 Rideal's formula for dilution of sewage, 16 

 Ridge and furrow irrigation, 137, 141 

 Ridgway Automatic Distributor, 285 

 Rivers Board, 348 



,, disinfection of, 169, 173 

 ,, pollution of, 4, 14, 18, 41 



,, Pollution Commissions, 19, 55, 168, 

 310, 320, 329 



,, purifying action of, 14, 18, 130 



,, permissible admixture of sewage or 



effluent, 15, 18, 169 

 Road detritus, 6, 28 

 Rochdale, 10 

 Rockner-Rothe tank, 163 

 Roll cultures, 66 



Root crops on sewage farms, 138 

 Roscoe filters, 274 

 Rotary screens for sewage, 150 

 Roubaix process of extracting waste wool 



fat, 337, 338 

 Roughing filters, 152 

 Royal Commission reports, 34, 47, 85, 154, 



171, 172, 203, 320, 327, 347 

 Rye-grass in irrigation, 138 



Salford sewage treatment, 244 

 Samples, method of collecting, 27 



,, bacterial, 6i 

 Sand filters, 207-209, 210, 263 

 Sandy soils, Chap. VI. 

 Sarcina, 105 

 Scavenging, 6 



Scott-Moncrieff, 250, 268-272, 300, 309 

 Screening, 150, 214, 216 

 Scum, bacteria], 254, 264, 275 

 ,, harbour, 80 

 ,, plates, 162, 263 

 ,, Xdi'aks, footnote, 2jc^ 

 Sea, discharge into, 19, 20, 170, 317 

 ,, lettuce, 80 

 ,, water admixture, 317 

 ,, ,, electrolyzed, 184 

 ,, weed, 80, 81 

 Secondary beds, 217, 221 

 Sedimentation {see Settling) 

 Separate system, 12, 137, 312 

 Septic fermentations, 100 



tank, antecedents of, 204, 250 



,, effluents, 108, 187 

 tanks, 253, 258-267 



,, closed and open, 259, 275, 280 

 ,, duration of stay in, 254, 261 

 Settling tanks, 161 



Sewage, application to land. Chap. VI., 209 

 ,, classification of, 5, 11 

 ,, discharge into cesspools, 2 

 ,, ,, ,, rivers, 4, 14, 56, 169 



i> ,, ,, the sea, 19, 170, 217 



,, farms, suitable crops, 137 

 ,, farm effluents, 40, 145 

 ,, farms, pollution by, 9, 193 

 ,, flow of {see Gauging and Flow) 

 ,, fungus, 78, 79 

 ,, precipitation by chemicals, 155 

 ,, strength of, 13, 161 

 Sewer gas, 2 {see also Gases) 

 Shake cultures, 65 

 Sheffield, sewage treatment at, 280 

 Shellfish, 170, 327 

 Ship Canal, Manchester, 276, 317 

 Shores {see Foreshores) 



Silica jelly for nitrifying organisms, 67 



Silicates for cultures, 123 



Sirosiphon, 161 



Slate in filters, 235 



Slop closets, 13 



Slop- water, 5, 12 



Sludge. 55, 154, 164, 187, 255, 319, 337, 348 



,, cake, anal)ses of, 167 

 Smith-Leach process for recovering grease, 



339 

 Soap-water, 6, 12, 27, 113 

 Soil, action of, on sewage, 93 



,, infiltration of, 2, 3, 8, 9 

 . ,, nitrification by, 124 



,, suitability for sewage farms, 134 

 Soils, organisms in, 136 

 Solids of sewage, determination of, 32 



,, ,, suspended, 12, 28, 33, 150 



South Africa, 14, 29, 272 

 Sphaerotilus natans, 79, 161 

 Spirilla, 72, 114 



Spores, method of counting, 63 64 

 Sprinklers, 287-308 

 Stab cultures, 65 

 Staining bacteria, 70 

 Standards for effluents, 15, 55 

 Stages of purification, 100 

 Starch, hydrolysis of, 98, 113 

 Steam blown into filters, 242 

 Sterility, absolute, 191 

 Sterihzation by chemicals, 168-194 

 ,, filtration, 70, 329 



,, heat, 62, 70, 171 



Storm-water, 5, 12, 312-315 

 Stoddart's distributor, 288 



,, filters, 246 

 Straining for analysis, 29 

 ,, sewage, 28, 150 

 Straw, influence on denitrification, 129 



,, anaerobic solution, 112 



., presence in primarv bacteria beds, 



215 

 Street cleansing, 6 



,, gullies, 7 



,, sweepings, 200 



,, washings, 6 

 Streak cultures, 65 

 Streptococci, 75, 128 

 Streptothrix chromogena, footnote, 123 

 Sub-cultures, 68 

 Subsidence, 150 

 Subsoil water, 145, 316 

 Sugars, fermentation of, 113 

 Sulphates in sewage and waters, 40 

 Sulphide of iron, 115, 319 

 Sulphur compounds, 8i, 97, 114 

 Sulphuretted hydrogen, 28, 114 

 Surface plate cultures, 66, 72 

 Survival of pathogenic organisms, 84, 186 

 Sutton, analyses of sewages and effluents, 

 216 

 ,, system, 217, 222 

 Sydney, N.S.W., 19, 21 

 Symbiosis and synergetic, 100, loi, 112 

 Syphons, automatic, 283 



Tanks, aerating, 239 



,, anaerobic {see Septic) 



,, Dortmund, 163 



,, sedimentation (j^^ Settling) 



,, septic, 187 



,, settling, 161, 162 



