SEWERAGE OF A SEASIDE TOWN. 777 



Like all other engineers, Messrs. Shone and Anlt have carried 

 out sewerage works on their own particular system ; but no 

 one knows better than themselves that the ejector, upon 

 the use of which their special system — and it is an admirable 

 system — is based, is capable of rendering great service in 

 connexion with other systems. So it is altogether foolish and 

 misleading to speak of the use of the ejector as implying the 

 adoption of the Hydro-Pneumatic System for the whole of 

 the sewage, or as if the ejector were simply intended as a 

 sewage-pumping machine. At Southampton its chief use is 

 to lift the sludge from the precipitating tanks and deliver it 

 through a 4-inch iron pipe to the manure works, which are 

 in one instance a mile, and in another instance 2^ miles from 

 the tanks. At Warrington an ejector in like manner sends 

 the nightsoil collected from the pails in the town to the 

 manure works in the suburbs. 



To those who have not seen the ejector at work the 

 accompanying drawing, showing one in section, may give 

 some aid in understanding its action. It is usually placed in 

 a brick chamber under the tank or sewer in connexion with 

 which it is to work. The communication from the tank or 

 sewer to the ejector is shewn on the left hand side, and from 

 it an iron pipe marked " inlet " delivers the sewage or 

 sludge by gravitation into the ejector, which consequently 

 must be j)laced sufficiently below the level of the sewer or 

 tank to allow the sewage or sludge to rise to the toj) as 

 high as the bell marked (B), and to do this it raises the ball- 

 valve (v^) on the inlet pipe. The bell (B) and the cup 

 (C) are both fixed on a spindle, the rising and falling of 

 which works the slide-valve of the automatic gearing con- 

 nected with the compressed air main. The slide-valve box 

 is marked (v'), and the compressed air-pipe is shewn coming 

 into it from the left. When the sewage or sludge rises in 

 the ejector up to the bell (B), the atmospheric air in the bell 

 is enclosed, and as the sewage or sludge still rises it raises the 

 bell and its spindle sufficiently to shift the slide-valve and 

 allow the compressed air to jmss through the opened ports 

 on to the surface of the sewage or sludge in the ejector. 

 The amount of compression given to this air is, of course, 

 dependent on the duty it has to do, so if it be necessary to 

 lift the sewage or sludge a considerable height, or to force it 

 along a considerable length of main, a corresponding degree 

 of compression has to be given. Immediately the com- 

 pressed air acts on the surface of the sewage or sludge the 



