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district, so that, if possible, some definite plan might be arranged
for the efficient ventilation of the sewers in these new districts.
It is further pointed out, in opposition to the specific
suggestion that until recently it was the practice to have the
rain-water down spouts directly connected with the drain, thereby
actually providing the ventilator in the suggested situation; but
as showing the strong modern tendency for keeping these sewer
and drain emanations, if possible, altogether away from the
house, the new By-laws of the London County Council, now in
force throughout London, actually prohibit this plan of ventilation,
by requiring all fall pipes to be cut off from the drain by
discharging over a trapped gully.
Also, that this modern tendency is further exemplified by the
model By-laws of the Local Government Board, which require
the interceptor to the main drainage channel to be placed as near
as possible to the sewer, and as far as possible from the house,
thus endeavouring to keep these possible emanations outside the
curtilage of the property.
There is no doubt that under modern conditions this problem
is one of the most difficult ones with which the Sanitary
Authorities have to grapple, in order to find a method that shall
be applicable and satisfactory under all conditions.
I am, yours respectfully,
E. G. ANNIS,
Medical Officer of Health.