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237
Commission above referred to) will have to be adopted, and that
the sewage, whether previously clarified or not, must either be
filtered through land or discharged into the estuary at a point
not higher than the Sea Reach." So it would appear that in Sir
H. Roscoe's opinion the costly works which the Board are now
constructing for dealing with the sewage in their own way, and
in opposition to the views of the Royal Commission, will not
effect the object contemplated, and that the Board, or the
London County Council rather, will ultimately have to deal
with the disposal of sewage on the lines of recommendations by
the Royal Commission, which the Board have practically
ignored.
(4.) A further report, dated March 3rd, 1888, treats of the
deodorization of sewer emanations by the use of sulphurous
acid—applied, at over 196 different stations in the Metropolitan
area, in the form of a saturated aqueous solution allowed to drop
upon flannel, and the annual cost being about £11 to £12 per
station. It is stated that the offensive smell from the sewers
appears to be diminished by the use of the acid, complaints
having been less numerous from the occupiers of bouses in the
vicinity of the shafts in which the deodorant had been placed,
than was the case previously. But the experiments were conducted
during the cold months of the year, and " the process
has yet to go through the ordeal of summer temperature."
(5.) In his latest communication entitled " Second Report on
the Deodorization of Sewer Emanations and on Sewer Ventilation''
(undated in the printed copy), Sir H. Roscoe reports the
results of inspection by his assistant of the stations in the
Metropolis where sulphurous acid is employed for the deodorization
of sewer emanations. Sir H. Roscoe has come to the conclusion
that'• the present method of applying this substance is
not satisfactory," as " the apparatus did not work effectively in
50 per cent." of the stations. The failure resulted from the
difficulty in regulating the discharge of the acid, and from