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The sewers reconstructed during the year (about three-quarters of
a mile) have been as under:—
9-in. and 12-in. Sewer in Park Road, Length
Crouch End 616 Yards.
15-in. Sewer in Archway Road, Highgate 450 ,,
18-in. Do. Northwood and Clare-
mont Roads, Highgate 193 „
9-in. Do. Fortis Green 83 ,,
9-in. Do. Stanhope Road 30 „
Total 1,372 „
Flushing.—Careful attention has been given to the flushing of
the sewers, and several old manholes have been inverted, which will
prevent any accumulation of soil. A number of cast-iron hand and
flushing discs have also been fixed in the manholes. The quantity
of water used for the purpose during the year amounted to 19,866,000
gallons.
Ventilation of Sewers.—The ventilation of the sewers has
been improved by the erection of 32 upcast shafts. The surface
ventilators in the roads have been closed in all cases where these new
vertical shafts have been put up.
Gullies.—Wherever nuisances have been found to arise from old
gullies, principally owing to their not being properly trapped, new
gullies with effective water-seals have been substituted with good
results.
I remain, Gentlemen,
Your obedient Servant,
HENRY CLOTHIER, M.D., (Lond.),
Medical Officer of Health.