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18
pipes for bacterialogical examination, which afford a
certain guide as to the efficient working of the filters.
If the bacteria in any particular sample of water
show signs of approaching the limit which is permissible
in pure drinking water, notice is immediately
sent to the Company in order that the imperfectly
filtered supply can be cut off from the distributing
mains and the defective filter remedied. Special
samples have also been taken from the general shafts
at the different water works, when the number of
bacteria have been uniformly low, the average being
30 per cubic centimetre.
Inspection of the Parish.
Building operations have progressed with
tolerable activity, more especially in Gunnersbury and
other parts of the Parish.
During the past year much important work has
been done in the way of house-to-house inspection ;
also special attention has been given to the smaller
houses in the district, where the question of sanitation
is least considered by the owners. A considerable
number of house drains have been reconstructed
in accordance with the requirements of the byelaws.
Each house has been carefully examined, and on the
smoke test being applied to the drains many have
been found defective.
In Devonshire Road, Chiswick, the drainage of
several houses was seriously defective. In one
instance a large brick drain was found immediately
under the passage, and when opened was full of
sewage owing to the drain being improperly connected
with the sewer. The drain had evidently been leaking
into the subsoil for some considerable time, and the