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of air were taken. Two of these samples revealed the
presence of 12.4 and 14.8 parts per 10,000 of carbondioxide,
respectively, both being above the permissible
limit of 10 parts per 10,000.
COMBINED DRAINAGE SYSTEMS.
The reconstruction and maintenance of such combinations
of drains of houses and premises as are
found to be sewers by law defined and are not under
highways is carried out by the Public Health Department.
There are 707 such systems in the Borough,
draining approximately 3,290 houses and premises.
The staff engaged on this work consists of a
drainlayer and two labourers, with additional help as
required.
During the year nine systems were reconstructed,
taking 41 houses.
DRAINAGE WORK.
Legal proceedings were taken during the year in
respect of various offences in connection with drainage
work, as follows:—
Constructing w.c. without notice, 3; constructing
w.c. in contravention of by-laws, 2;
constructing drain without giving notice, 1;
constructing drain in such manner as to be
nuisance, 1; and making connection to sewer
without submitting plans, 1.
The proceedings were successful in 6 cases, in
the other 2 the summonses were withdrawn for technical
reasons upon payment by the defendant of
£1 1s. costs on each summons.