Ditto of separate brick ditto, 390l. 4s., or 8l. 9s. 8d. per house.
“In a fourth block of 46 houses—
The length of back drains, 985 feet.
Ditto of separate ditto, 2913 feet.
Cost of back tubular drainage, 66l. 8s. 2d., or 1l. 8s. 10½d. per house.
Ditto of separate ditto ditto, 262l. 11s. 7d., or 5l. 14s. 2d. per house.
Ditto of separate brick ditto, 614l. 16s. 3d., or 13l. 7s. 3¾d. per house.”
I have mentioned the diversity of opinion as to the best form, and even material, for a sewer; and there is the same diversity as to the material, &c., for house and gully or street-drainage, more especially in the pipes of the larger volume. The pipe-drainage of any description is far less in favour than it was. One reason is that it does not promote subsoil drainage; another is the difficulty of repairs if the joints or fittings of pipes require mending; and then the combination of the noxious gases is most offensive in its exhalations, and difficult to overcome.