Public Health Act on the subject — Definition of sewer — Definitions of sewerage and sewage — Requirements of good system of sewerage — Position of sewers should be at back of houses — Form of notice to carry sewer through private lands — Hints for carrying out sewerage — Stamford’s joint — Pipe sewers — Drawing of various pipes — Causes of breakage — Causes of chokage — Separate system — Advantages of partial separation — List of different methods of sewerage — Dry systems
CHAPTER XXI.
SEWAGE DISPOSAL.
Magnitude of question — Interception — List of methods of disposal — Tidal outfalls — Broad irrigation — Crops for sewage — Intermittent filtration — Action of earth on sewage — Mechanical subsidence — Artificial filters — Screening — Precipitation — List of chemical processes — List of chemical ingredients — Disposal of sludge — Effect of plants on sewage
CHAPTER XXII.
VENTILATION OF SEWERS.
Duty of dealing with noxious sewer vapours — Germ theory and open ventilation — Open shafts and objections to them — Shafts against dwellings — Use of rainwater pipes — Use of lamp posts — Charcoal trays — Use of chimney shafts — Lofty shafts — Failure of furnaces — List of methods tried — Annihilation of sewer gas — Composition of sewer gas — Direction of flow — Importance of disconnecting house drains
CHAPTER XXIII.
PUBLIC CONVENIENCES.
Clause of Public Health Act empowering their erection — Selection of site — Construction of Urinals — Why iron is preferable — Description of urinals — Public w. c. accommodation — Description of a simple w. c. — Jennings and Macfarlane for urinals