SEWAGE AND SEWAGE RIVEB8. 173 



in it renders the sewers still more dangerous to clean. By 

 disinfecting the sewers the decomposition is put a stop to 

 during their whole course, the mixture also is being made 

 during the flow of the water, and by the time it comes to the 

 reservoir it will be ready to precipitate. 



It has been said that this liquid will flow along the river in 

 the manner that was proposed for removing the sewage from 

 London, some years ago, by the painter Martin. I increase 

 the plan simply by a succession of these. Now this liquid in 

 its flow will form a constant supply of liquid manure, it will 

 therefore answer the purpose of the elaborate set of tubes 

 made by some parties for irrigation, and it may be pumped 

 out on the surrounding ground and spread by a jet or by 

 irrigation. It may even be drained off" to a lower level, 

 where it is convenient, and where the fall of the river is 

 great, so as to irrigate by gravitation. This liquid being dis- 

 infected, may without fear be put upon the land without 

 scattering around it a noisome odour. The system includes 

 all the best portions of the other systems, in my opinion, 

 whilst it adds new features not to be found in any hitherto 

 devised system. 



If the water were to be used by jet only, then there would 

 be a great excess at certain portions of the year, and as it 

 could not be properly disposed of, it must be allowed to go 

 again into the river. This argument is, I think, almost con- 

 clusive against the mere use of the liquid manure plan ; it 

 neither uses its material, nor leaves time for consideration to 

 the farmer, every day is bringing down its stated quantity, if 

 it be on Christmas or Midsummer, and for good or evil this 

 must be disposed of. If we use large precipitating tanks, 

 we get rid of that difficulty ; the matter stands until it is 

 wanted. 



But again, if we reject the liquid manure system we reject 

 a method which has already been shewn to be of the very 

 highest value, and more than that, we lead the liquid manure 



