of the Toion of Southampton. 593 



so as to form the mud into a platform, quay, or whatever might 

 be desirable ; or, secondly, by greatly extending the sea wall 

 into the bay, and filling up the space between it and the present 

 shore with mud from the bay. Both modes might be adopted 

 according to circumstances. It is quite unnecessary to enter 

 into details. 



Sewerage. — The situation of the sea wall being fixed on, not 

 only throughout the whole of the present length of the town, 

 but to whatever extent it may be supposed to reach up and 

 down the river in the course of fifty years, say somewhere 

 beyond Blechendon Terrace, or perhaps even as far as Mil- 

 brook Point or Milbrook itself at the one extremity, and nearly 

 as far as Netley Fort on the other, the distance at which 

 lines of houses are to be kept from the river should also be fixed 

 on. Then construct a sewer also the whole of this length, be- 

 tween the houses and the water, taking care to provide for the 

 free egress of streams of water to the river, by conducting 

 them in inverted siphons under the sewer in some cases, and in 

 others, where the clear water is of some extent, as in that of the 

 river Itchen, carrying the sewer (in a cast-iron pipe, perhaps 2 ft. 

 or 3 ft. in diametei', and joined so as to support itself) over the 

 stream. This arch may be of a sufficient height to allow masted 

 ships to pass imderneath. The sewer also should have occa- 

 sional safety sluices, to admit of turning its contents at once 

 into the bay in case of extraordinary rains, or other cases that 

 might endanger the bursting of the sewer. This main sewer 

 we would carry down for a mile or two parallel to the margin 

 of the bay, raising the bottom of the sewer gradually to the 

 surface, so as at the extreme end to deliver its contents there in 

 such a situation, and in such a manner, as woidd render them 

 available for irrigation or other agricultural purposes. 



The object of this main sewer is to intercept all the other sewers, 

 so as to prevent now, and at all future times (with the exception 

 of cases when the safety sluices are opened), any of the sewers 

 from emptying themselves into the bay. When the town extends 

 in all directions, a second, and perhaps a third, intercepting 

 sewer may be required in the interior of the town ; the dii'cction 

 of these may be, if the surface will admit, somewhat parallel to 

 the main sewer ; and they may be so conducted as to deliver 

 the sewerao;e on the surface at higher levels than that of the 

 lower or main sewer, so that the contents shall be applicable to 

 higher grounds. 



The principal objection that we can foresee will be made to 

 our plan of having the main sewer close to, and parallel with, the 

 edge of Southampton Water, would be the difficulty of conduct- 

 ing such a sewer across the river Itchen ; but over this river, 

 or one as wide as the Thames, a sewer might be conducted, as 



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