LIST OF ILLUSTRATIONS 



kk;. page 



1. V-Notch ... ... ... ... ... ... ... 23 



2. Venturi Meter in closed pipe ... ... ... ... ... 26 



3. Venturi Meter in open channel .. ... ... .. ... 26 



4. Sewage proteus ... ... ... ... ... ... ... 74 



5. Proteus vulgaris ... ... ... ... ... ... ... 73 



6. Sewage proteus ... ... ... ... ... ... ... 74 



7. Bacillus enteritidis sporogenes ... ... ... ... ... 73 



8. ,, membraneus patulus ... ... ... ... ... 74 



9. ,, fusiformis ... ... ... ... ... ... 74 



10. ,, mesentericus. Sewage variety I. ... ... ... ... 74 



11. .. ,. .. ,, E. ... ... ... ... 74 



12. ,, subtilissimus ... ... ... ... ... ... 74 



13. Beggiatoa alba ... ... ... .. ... ... ... 79 



14. Crenothrix Kiihniana ... ... ... ... ... ... 79 



15. Leptomitus lacteus, showing constriction and nucleus ... ... 79 



16. ,, ,, showing branching ... ... ... ... 79 



17. Sphaerotilus natans ... ... ... ... ... ... 79 



18. Carchesium Lachmanni ... ... ... ... ... ... 80 



19. Section showing underdrains in Irrigation ... ... ... ... 142 



20. Rotary Screen for crude Sewage at Southall Sewage Works, Isleworth 151 



21. Contact, or " Dibdin " Filters at Sutton ... ... ... ... 218 



22. Lowcock's Aerated Bacterial Filters •" •... ... ... 237 



23. Section of Ducat's Filter ... ... .:. ... ... ... 241 



24. Filtering Material in Ducat's Filter ... ... ... ... 241 



25. Caterham Cultivation Tank ... ... ... ... ... 252 



26. Filter House at Caterham ... ... ... ... ... 253 



27. Experimental Septic Tank and Filters, Belle Isle, Exeter ... ... 258 



28. Working of Cameron's Automatic Gear ... ... ... ... 259 



29. Sections of the Ashtead Cultivation Bed and Zonal Tray Filters ... 268 



30. Changes of Nitrogen in Oxidizing Trays ... ... ... ... 270 



31. Section of Intermittent Supply by Adams' Syphon ... ... ... 283 



32. Plan of Intermittent Supply by Adams' Syphon ... ... ... 283 



33. Section of Automatic Discharge by Adams' Syphon ... ... ... 284 



34. Plan of ditto ... ... ... ... ... ... ... 284 



35136,37. Details of Stoddart's Continuous Filter ... ... 288,289 



38. " Acme " Fixed Sprays ... ... ... ... ... ... 290 



39. Nozzle Distribution at Birmingham : Tame and Rea Sewage Works ... 291 



40. Ham and Baker's Nozzle, as used at Birmingham ... ... ... 292 



41. Sprinkler Nozzle, Columbus, Ohio ... ... ... ... 293 



