The Sun.
London, England, 1851-02-04 00:00:00

"London, Jan. So, 1851.
" To the Hon. She Commissioners of the Metropolitan

Sewers.

"My Lord and Gentlemen,—l have the honour, in
accordance with instructions received from you on the
subject of the drainings of the northern part of the me-
tropolis (which instructions are transcribed below), to
lay before you my report.
(Copy of Instructions.)..

" in effecting the drainage of this
portion (northern) of the metropolis, it is expedient to
keep the river Thames within the metropolitan districts
free from sewage at all times of the tide; that it is ex-
pedient to provide an escape by means of intercepting
drains for so much of the sewage of the north side of the
Thames, as admits of being so carried off; that all other
sewage be raised by artificial means, so as to be delivered
into a main channel for removal, in accordance with the
other resolutions; to construct the intercepting sewer so
as to secure the largest amount of effective drainage,
without having recourse to artificial means.

" Resolved,...—That the fall of the new intercepting
sewer from Albion-street, Uxbridge-road, into the river,
be in no place less than four feet per mile.
"`Resolved,--That Mr. Forster be directed to pre-
pare plans and estimate, according to the foregoing
resolutions, carrying the whole of the sewage to
Galleons-reach, at the same time considering the alter-
native in the event of accident to such machinery as
may be necessarily employed to carry the same into or
near the river Lea.'
" And that pursuant to further instructions Mr. Hay-
wood and myself examined and reported upon the area
•)loured blue on the general map, which joint report was
received by the committee.

" ' Resolved,—That the engineer be instructed to pre-
pare a full and detailed report, with plans and sections,
in accordance with the resolutions of the committee, on
the drainage of the whole of the metropolis north of
the Thames, including the city of London, and that he
avail himself of the assistance of Mr. Haywood in such
duty.'
" In conformity with this resolution, I have now the
honour to lay before you my report, which will be found
to agree with the conclusions arrived at on the points
reported upon by Mr. Banning, Mr. Haywood, and my-
self, and approved of by your Hon. Commission. I beg
to add that in the numerous calculations and other con-
siderations requisite in drawing up this report I have
had the benefit of Mr. Haywood's advice and assistance
throughout.
" In devising a plan of drainage for the northern por-
tion of the metropolis in accordance with the instruc-
tions before stated, and also in conformity with those
principles by which I was guided in laying down the
plan for the interception of the sewage of the southern
side of the Thames, the district appears to divide itself
into two separate areas, for which different means re-
quire to be adopted, viz.:—
" 1. The interception of the drainage of that dis-
trict which from its elevation above the level of the out-
let, is capable of having its sewage and rainfall carried
off by gravitation.
" 2. The interception of the drainage of that district
which from its low-lying position will require its sewage,
and in most localities its rainfall, to be lifted by steam-
power to a proper level for discharge-
" These two districts are indicated upon the general-
ogtp attached hereto by distinctive colours.
The district for natural drainage is tinted red, its
area being about 25 1-6 square miles.
" The district for antifieial drainage is tinted blue, its
area being about 16 1-6 square miles.
'*ln the two small tracts coloured dark blue, viz., the
southern part of the Isle of Dogs, and a narrow tract on
the west side of the river Lea, it is intended to allow the
rainfall torun into the Thames and the Lea repeotively.
The area of these two tracts amounts together to 11
square miles.

squtruslilise.
sSgeuarwae es.geill
" The total area, therefore,
proposed to be drained by na-
tural outfall from the diatlict
coloured red will be about...
" The total area proposed
to be drained by the applica-
tion of steam power from the
district coloured blue will be
about

25 1 6 25 1-6

14 1-3 16 1.6

393 41 1-3
"It will be observed that the district lying to tho
south-west of the portions tinted red and blue upon the
general plan is not iticlud‘d in the foregoing calcula-
tions of areas, although it contains a portion of the
Counters-creek and the Fulham and Hammersmith dis-
tricts the total area of which is about 16 square
Of this area but a very small portion is at present built
upon, and probably if one-'-alf, or eight equare miles, is
estimated as requiring the provision of means for inter-
eeptien of its sewage and rainfall, it will include an area
which may not be built upon and populated for the nest
half ceuttury. I have not, therefore, deemed it needful
to provide in my plan for the interception of the sewage
and rainfall of a larger area than eight square miles.
An additional reason for apt doing so is that the
establishment of the Metropolitan Selvage Manure Com-
pany's works is iA the heart of the district, which i