)0mc JicmiTrhs 011 J^eto^ragc 



By albert p. I. COTTERELL, 

 Assoc. M. Inst. C.E. 



Bead before the Engineering Section^ Oct. IGth, 1888. 



IN laying this paper before your Societ}^, I feel no apology 

 is needed for the subject dealt with, as the problem of 

 the collection and disposal of the refuse of our communities 

 should, and must always, be a matter of universal popular 

 interest ; whilst the important works consequent upon the 

 fierce light of modern science that has been brought to 

 bear upon the subject, and consequent also upon that 

 essential feature of the nineteenth century — co-operation, 

 have brought it so specially within the domain of the 

 engineer, that it becomes a fit subject for our discussion. 



I must, however, plead, on account of its vast extent, to 

 being only able to lay a portion of the subject before j^ou. 



In the first place, I propose to deal only with that refuse 

 matter most liable to decomposition, and to cause injurious 

 effects, commonly called sewage ; and in the second place, 

 to consider only the means of collection and transmission by 

 means of sewers, and not of the final disposal of sewage. 



