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tide. This accumulation must displace the sewer gasses and force them out through the manholes and gullies into the streets, as the quantity of water in the trap cannot be sufficient to absorb all the sewer gasses under such conditions. A third defect in the system is the want of any flushing arrangements. The rainfall suffices during part of the year, but during the dry season sewer gasses must be largely generated from decomposition of filth of various kinds which sticks to the walls of the drain. This condition will naturally become worse as drains become older.
I should recommend that the entire system be ventilated obviating the present escape of sewer gasses during high tide and heavy rain and 2nd. that arrangements be made for flushing during dry weather and 3rd. that some arrangements be made to allow the continuance of the discharge from the sewers during the time of high tide.
I have the honour to be,
Sir,
Your most obedient servant,
(sd.) J.D.Daly, M.B.
Major, I.M.S.