| Elevation. | |
|---|---|
| Lewisham | 28 |
| Wandsworth | 22 |
| Greenwich | 8 |
| Camberwell | 4 |
| Lambeth | 3 |
| St. Saviour (Southwark) | 2 |
| St. Olave | 2 |
| Bermondsey | 0 |
| Rotherhithe | 0 |
| St. George’s (Southwark) | 0 |
| Newington (below high water) | 2 |
From these returns, made by Capt. Dawson, R.E., the difficulty, to use no stronger word, attending the sewerage of the Surrey district is shown at once. There is no flow to be had, or—the word more generally used, no run for the sewage. In parts of the north of England it used to be a general, and still is a partial, saying among country-people who are figuratively describing what they account impossible. “Ay, when? When water runs up bank.” This is a homely expression of the difficulties attending the Surrey sewerage.
There is, as regards these Surrey, more than the Kent, sewers, another evil which promotes the “articulation of cesspools.” Some of these sewers have “dead-ends,” like places which in the streets (a parallel case enough) are known as “no thoroughfare,” and in these sewers it is seldom, in any state of the tide, that flushing can be resorted to; consequently these cesspool-like sewers remain uncleansed, or have to be cleansed by manual labour, the matter being drawn up into the street or road.
The refuse conduits of the metropolis are of two kinds:—
- 1. Sewers.
- 2. Drains.
These two classes of refuse-charts are often confounded, even in some official papers, the sewer being there designated the “main drain.” All sewerage is undoubtedly drainage, but there is a manifest distinction between a sewer and a drain.
The First-Class Sewers, which are generally termed “main sewers,” and run along the centres of the first-class streets (first-class alike from the extent or populousness of such streets), may be looked upon as underground rivers of refuse, to which the drains are tributary rivulets. No sewer exists unconnected with the drains from the streets and houses; but many house-drains are constructed apart from the sewers, communicating only with the cesspools. Even where houses are built in close contiguity to a public sewer, and built after the new mode without cesspools, there is always a drain to the sewer; no house so situated can get rid of its refuse except by means of a drain; unless, indeed, the house be not drained at all, and its filth be flung down a gullyhole, or got rid of in some other way.
These drains, all with a like determination, differ only in their forms. They are barrel-shaped, made of rounded bricks, or earthenware pipeage, and of an interior between a round and an oval, with a diameter of from 2 to 6 inches, although only a few private houses, comparatively, are so drained. The barrel drain of larger dimensions, is used in the newer public buildings and larger public mansions, when it represents a sort of house or interior sewer as well as a house main drain, for smaller drains find their issue into the barrel-drain. There is the barrel-drain in the new Houses of Parliament, and in large places which cover the site of, and are required for the purposes of several houses or offices. The tubular drain is simply piping, of which I have spoken fully in my account of the present compulsory mode of house drainage. The third drain, one more used to carry refuse to the cesspool than the sewer, but still carrying such refuse to the sewers, is the old-fashioned brick drain, generally 9 inches square.
I shall first deal with the sewerage, and then with the house and street drainage.
The sewer is a twofold receptacle of refuse; into it are conveyed the wet refuse not only of many of the houses, but of all the streets.