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63.
The deodorising chambers for sewer ventilators which I
designed eighteen months since continue to work satisfactorily.
In no case have any of the new ones, which have been constructed,
worked quite so well as the first one made. This had
two boxes, one on either side of the ventilating shaft. In this
case one side acts as an inlet for pure air, and the other as an
outlet for the air purified by the process.
For the better information of those members who have not
had the opportunity of seeing this simple apparatus, I have had
the accompanying diagram prepared.
During the year 44 houses have been connected with the
sewers of the Hamlet, and 12 new gullies constructed.
Two-hundred and twenty-two cubic yards of deposit have
been removed from the sewers, and 403 yadrs from the gullies
of the District.
I am, Gentlemen,
Your obedient Servant,
J. M. KNIGHT,
Surveyor.
Vestry Hall,
Mile End,
June, 1885.