The Express.
London, England, 1855-01-11 00:00:00

tenneeted, so as to deliver the awn: at Bow-Maki luta
towage manure works could be formed, Of the line Carried
forward to Barking-creek.
" With respect to this, a model is in preparation end
nearly complete, abowieg what can be done ; acid, as it le
. intended to exemplify other matters connected with the
main dealings, I shall feel pleasure in showing it to yon fee
your information.
' "Another matter for consideratioa was that, as the pas.
sage of the fool Norge into the Serpentine has always boon
objectionable, it will be well to provide entirely for freeing
that water from such pollution. The outlet sewer acme
Hyde Park, hereafter described, would effect this as well
as relieve the Ranelagh sewer.
With respect to using the water for irrigation, there
are portions of meadow land ironed the. metropolis which
might be irrigated by the sewage water without having re.
acne to pumping. Although there is no doubt as to the value
of sewage water for irrigation, yet the use and benefit of It
are not generally so well understood as to induce persons to
make an outlay on that account, and when the time ar-
rives (as I doubt not it will) when the sewage of every
town and place will be eagerly sought after, it will be requt-
site for some legislative enactment to be made to facilitate
the passage through lands intervening between the source
of supply end the locality the owner of which may desire to
use the liquid manure. My opinion is that, although but •
portion of the sewage of the metropolis could be applied in
irrigation, yet that such portion would ultimately produce
a considerable ee .
" As to solid manure, there are several method, proposed
for collecting the solid portion of the sewage. Bach has its
merits, and although, in regard to the solid portion of the
sewage, there is a greater apathy on the part of the nubile
generally than towards its use by irrigation, and, although
it will take some time to give it a lull trial on different
lands, yet that its collection will ultimately remunerate
those engaged in the matter I do not in the least doubt.
" In the case of the metropolitan sewage, as parties ap-
pear anxious to speculate in collecting the solid, it would be
well, before you carry any intercepting sewer beyond the
Lea, if you, as conservators for the public, should ask
such parties on what terms and in what manner they would
enuage to manufacture the sewage of the metropolis (or any
portion thereof), and at what time they would propose to
make ample payment to the commissioners for the use of
the sewage.
" When the late Mr. Forster was preparing his plan for
intercepting the sewage, I procured for hint en offer for
purifying the sewage at the Isle of D.igs, and I think it
probable that the same person would renew the offer at this
time, if communicated with. This locality is eminently
suitable for collecting the solid manure ; a great portion of
the surface drainage can readily be kept separate from the
house drainage ; and I consider that, if the commissioners do
not agree to any offer that may be made, they should them-
selves cause works to be formed, and arrange with some
owner or owners of land to give the solid manure a fair trial,
which proceeding would prove a great boon ti the country
as well as the metropolis, as the proceeding, of the
metropolis, on many points, are looked alas an authority for
similar things being done in provincial places.
" When Mr. Forster received directions to prepare hie
plea for the n irtbern drainage, he wrote to me to ask as to
the fall of rain on the several days in a year. I sent him
the result for a year in which more than an average fall of
rain had taken place. This was as follows ; —Of the rainy
days there were 30 in which a quarter of an inch fell; 10 in
which half an inch fell; 2 in which three-quarters of an
iiieh fell ; mid 2in which one inch fell. It was decided to
provide for pasting what would come from a quarter of an
inch in 21 hours, or, 0•63 per acre per minute, and to allow
flood water,from greater falls to pass to the river.
" With regard to the sewage water, I h the noticed in
many sewers the run of water in day and night, and in one
instance I noticed, on a locality where there were abut
31,000 inhabitants to the square mile. and found that the
run of water in the sewer was about 29 gallons ler day to
each individual; and having noticed for o length of time
the:irregularity with which; his pa,eed to the se were, I dr cided
upon providing sewsge capacity for rather more than that
quantity in •deition to the capacity required for the quarter
of an iuch of rain ; being together one cubic foot per acre
per minute."