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2nd. Each’drain and cesspool, being entirely independent of 
the' rest, might be placed in the most convenient situation ; 
3rd. Percolation of sewage into the ground would be completely 
prevented; 4th. The entire sewage would be completely 
removed every day ; and 5th. The whole of it would be 
utilized. 
In the conversation which followed the reading of the Paper, 
Mr. Mc‘Dougall commented in strong terms on the system 
pursued in Manchester, whereby dung-heaps and the putrified 
refuse of slaughter-houses were exposed to the open air for 
weeks together. 
Dr. Smith deprecated any return to the cesspool drainage, 
citing Paris as an instance of the nuisance thereby created. 
Professor Calvert considered that the Paris system was 
wholly different from that recommended in the Paper, the 
chief merit of the latter being, that the cesspools were cleaned 
out every night, and in such a manner that no nuisance could 
arise. 
Mr. Binney stated that Dr. Joule’s plan resembled, in 
some respects, that of Mr. Glassford, who, by the introduction 
of a new description of water-closet, was enabled to pass the 
sewage in a concentrated form down pipes of very moderate 
inclination. 
