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interfering with the surrounding property, the work would not be
carried out by the Corporation, but the person concerned would be
advised to consult one of the contractors who specialise in such
work.
The normal work of rodent destruction continued during the year.
The annual 10% test-baiting of the soil system of sewers was
carried out in February, and infested manholes were subsequently
treated in March and October.
KEEPING THE BOROUGH CLEAN
I am obliged to A. S.KnOlles,. Esq., B.Sc», M.Inst.C.E., M.I.
Mun.E., Chartered C.E., the Borough Engineer and Surveyor for the
following report of Drainage and Sewerage and Refuse Disposal.
Drainage and Sewerage.
Work in connection with the East Twickenham sewer contract
has been completed and, on the evidence at present available, the
flooding formerly experienced in this area in times of heavy rainfall
has been eliminated.
Preliminary investigations into the improvement of the surface
water drainage of part of the Teddington area are being made.
Refuse Disposal
Operation of the Charlton Plant continues satisfactorily and
during the year there was an improvement in the price of certain
salvageable materials, and improved income for the year is therefore
envisaged.
Consideration is being given to alterations to the plant to
deal with the changing type and density of refuse.
WATER SUPPLY
All the dwellings in the Borough are supplied from the
Metropolitan Water Board's main, and I am indebted to Dr. E.Windle
Taylor, M.A., M. D. ,D.P.H. .M.R.C.S. .L.R.C.P. Director of Water
Examination, Metropolitan Water Board, for the following report:
The source of water is the River Thames and it is stored in
the Thames Valley reservoirs at Staines, Littleton and Walton.
After storage the water is treated at the filtration works at
Hampton. Samples of water are collected at all stages of the
purification process at least five times a week and the summary
of the analyses of the finished water are set out on page 22.
The supply is not piumbo-solvent and there have been no
important extensions to trunk mains nor changes in the general
scheme of supply to your area. New mains have been laid in
Twickenham to the extent of 2,188 yards and all these new as well
as repaired mains are disinfected with chlorine before being
restored to supply and samples of water from them are tested to
establish that its quality is up to that normally supplied.
INDUSTRIAL HEALTH
Factories
There are in the borough as many as 305 factories. Most of them
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