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• “Acme” spray nozzle, 151
• “Adams-Cutler” distributor, 135
• “Aerat” distributor, 145
• Apparatus for contact beds, 205
• ” for dosing tanks, 167
• ” for measuring flow, 232
• ” for percolating filters, 106
• ” for sludge removal, 40
• ” for sterilisation, 242
• Auto-mechanical syphons, 168, 169, 180
• Birmingham fixed spray, 155
• Candy-Whittaker bacterial tank,60
• ” ” distributors, 106
• Capacity of contact beds, 222
• ” of detritus tanks, 23
• ” of effluent settling tanks, 182
• ” of percolating filters, 222
• ” of sedimentation tanks, 29
• ” of storm-water tanks, 227
• “Capillary trough” distributor, 146
• “Carlton” adjustable fixed spray, 152
• “Carlton” distributor, 123
• “Carlton rotor” distributor, 121
• Chemical mixers, 72
• Cleaning gear for spray holes, 119, 122, 125
• “Coleman” dosing valve, 168
• Columbus fixed spray, 155
• Contact beds, 189
• ” ” apparatus for, 205
• ” ” capacity of, 222
• ” ” filling material for, 203
• ” ” general design of, 190
• ” ” methods of construction of, 196
• ” ” ” of distribution on, 199
• ” ” method of operation of, 191
• ” ” necessity for testing, 198
• ” ” sub-drainage of, 201
• “Cresset” distributor, 110
• Decanting valve, 49
• Detritus tanks, 23
• ” ” capacity of, 23
• ” ” Dortmund type of, 25
• ” ” sludge scraper for, 27
• Dibdin, W. J., 68, 189
• Digby meridioniser, 243
• Disc sprays, 155, 157
• Distribution by flooding filters, 157, 186
• ” methods of, 104
• Distributors, 106
• ” cleaning gear for spray holes of, 119, 122, 125
• ” fixed, 143
• ” power-driven, 129, 140
• ” revolving, 106
• ” travelling, 138
• Dortmund tanks, 25, 51, 52
• Dosing apparatus, 166
• ” tanks, 162
• ” ” disadvantages of, 160
• ” ” necessity for, 159
• Drainage of filters and beds, 90, 201
• Ducat filter, 144
• Effluent settling tanks, 182
• Elliott and Brown, 59
• “Facile” distributor, 119
• Feed channels, 163
• “Fiddian” distributor, 127, 138
• Fieldhouse tank, 65
• Filtering material, 101
• ” ” grading of, 103, 204
• Fine-grain filters, 185
• Fixed distributors, 143
• ” sprays, 147
• Floating arm, 48
  
• Floor-tiles, 91
• Gauge weir penstocks, 233
• Grading of material, 103, 204
• Gravity disc sprays, 155, 157
• Grit chambers (see also Detritus Tanks), 23
• Haller and Machell, 145
• “Hanley” distributor, 140
• “Hartley” distributor, 130
• “Hodgson” distributor, 127
• Humus pits, 182
• Hydro-extractor for sludge, 81
• Hydrolytic tank, 52
• Hypochlorite solutions, 242—247
• Imhof tank, 57
• Intermitting valves (see Dosing Apparatus)
• “Kessel” tank, 63
• Lowcock, S. R., 51
• Low-draught syphon, 167
• Massachusetts Institute of Technology, 155
• Material for filters and beds, 101, 185, 203
• Measuring apparatus, 232
• Non-septic cylinder, 61
• Percolating filters, 85
• ” ” aeration of, 86
• ” ” capacity of, 222
• ” ” distributors for, 106
• ” ” floor-tiles for, 91
• ” ” floors for, 88
• ” ” general design of, 85
• ” ” material for, 101
• ” ” methods of distribution on, 104
• ” ” ” of feeding, 159
• ” ” planning of, 98
• ” ” sprinklers for, 106
• ” ” sub-drainage of, 90
• ” ” types of construction of, 87
• ” ” walls for, 95
• Ponding valve, 178
• Power-driven distributors, 129, 140
• Precipitation tanks, 47
• Preliminary processes (see Tanks, also Slate Beds)
• Recording apparatus, 234—239
• Revolving distributors, 106
• Royal Commission on Sewage Disposal, recommendations, 3, 16, 23, 29, 32, 182, 224, 226, 227
• Ryder, E. E., 93
• Salford fixed spray, 155
• Sand-filters, 185
• “Scott-Moncrieff” distributor, 130
• Screens, 3
• ” bars for, 4
• ” for deep sewers, 7
• ” mechanical, 7
• ”” rake, cleaning gear for, 12, 14
• ” rotary, 5
• ” simple, 3
• “Separator” tank, 65
• Sewage mixers, 73
• Shone and Ault, 53
• “Simplex” distributor, 125
• Skegness tank, 59
• Slate beds, 67
• ” slabs and blocks, 68, 92
• Sludge disposal, 71
• ” draining beds, 83
• ” drying apparatus, 81
• ” presses, 75
• ” pressing plant, complete installation, 77
• ” removal, 25, 28, 35, 71
• ”” apparatus for, 27
• ”” elevators for, 40, 41, 42
• ”” well for, 38
• Spray jets, 147
• Sprinklers, 106
• Stand-by tanks for storm water, 229
• Sterilisation of sewage effluents, 240
• Sterilising solutions, 242
• ”” apparatus for the manufacture of, 242—247
• ”” ” for the injection of, 247—250
• “Stoddart” distributor, 142
• Storm-water overflow, diverting plate for, 17
• ” ” fixed weirs, 17
• ” ” floating weir, 21
• ” ” movable weirs, 21
• ” ” swinging syphon for, 21
• ” ” weirs, 16
• ” tanks, capacity of, 227
• ” treatment, 227
• Strength of sewage, 226
• Supply pipes, 163
• “Sypho-jet” distributor, 110
• Tanks, 29
• ” Candy-Whittaker, 60
• ” capacity of, 29
• ” circular, 25, 51—59, 60, 61, 66
• ” continuous-flow settlement without chemicals, 29, 32
• ” ” ” ” with chem icals, 29, 32, 47
• ”?decanting valve for, 49
• ”?detritus, 23
• ”?Dortmund type, 25, 51, 52
• ”?Fieldhouse, 65
• ”?floating outlet for, 48
• ”?hydrolytic, 52
• ”?Imhof, 57
• ”?inlets and outlets for, 40—47
• ”?”Kessel” type, 63
• ”?non-septic, 61
• ”?precipitation, 47
• ”?quiescent settlement without chemicals, 29, 32
• ”??” ”??with chemicals, 29, 32
• ”?rate of flow through, 34
• ”?rectangular, 33, 36, 37, 43—50
• ”?roofs for, 39
• ”?”separator”, 65
• ”?septic, 29, 32
• ”?Skegness, 59
• ”?storm-water, 229
• Taylor, W. Gavin, 105
• Travelling distributors, 138
• Travis, W. O., 52
• Trays and troughs, 143
• “Triple tank” system, 145
• “Venturi” meter, 237
• Walls of filters, 95
• Waterbury fixed sprays, 155
• Watson, J. D., 93, 130
• Weirs, fixed volume, 21
• “Whirl” spray jet, 149
• Willcox and Raikes, 49, 96, 135