CONCL USIONS REGARDING THE WARING SE WERA GE S YSTEM. 385 



renewed and passing only over recent matters moving in a rapid current of water, 

 has no odor. 



The officers of the city and the members of the Municipal Council, more par- 

 ticularly interested in the improvement of the sewerage of Paris, have watched 

 the experiment with interest, and I am permitted to say that the good services 

 rendered by the combined arrangements introduced by Mr. Waring contributed 

 largely to the influence which led the Municipal Council to decide, in its session 

 of the nth of April, 1884, that the preliminary official inquiry which is about to 

 be made, and which is' the prelude of a definite decision as to the method of sew- 

 erage for Paris, should relate both to the direct discharge of household wastes 

 into existing sewers, and to their removal by separate sewers. 



It seems certain that within a short time the entire suppression of vaults and 

 movable receptacles for foecal matter will be decreed, as well as those which 

 receive and retain excremental matters as those which attempt a division, and 

 are intended only to retain the solid portions ; and that the immediate removal 

 of all excremental matters and household liquids will be accomplished by their 

 direct discharge beyond the limits of the city. 



These substances will be discharged into the sewer, wherever the condition of 

 the sewers is suitable; they will be sent through the sewer, that is to say, by special 

 conduits located wherever possible in the interior of the- large sewers, where 

 their immediate delivery into the sewer itself would not be admissible — these 

 special conduits to deliver into the sewer as soon as a point is reached where the 

 necessary conditions for the rapid and complete removal of the discharge of such 

 affluents is assured. 



This is one of the great advantages of Waring's system of sewerage, that it 

 can as well be established in isolated sections, constituting an auxiliary and an 

 economical complement of the great system of sewers suited to receive fresh foecal 

 matter and household waste, as it can, by itself alone, be extended for the com- 

 plete drainage of whole quarters or of entire cities. 



Whatever may be the extension of a series of sewers according to Waring's 

 system, it retains always, by reason of its exclusion of storm-water, the great 

 advantage of requiring only small diameters and reasonable inclinations in which 

 the volume of flow undergoes only slight variations, and for the cleansing of 

 which relatively small quantities of water suffice. 



The establishment and maintenance of a system of sewers according to War- 

 ing's system has therefore in all cases the advantage of being economical. 



Paris, May, 1884. 



