146 TRANSACTIONS OF THE CANADIAN INSTITUTE. [Yoh. II. 



to draw conclusions therefrom, it will be necessary to give some of the 

 leading features of a few of them : — 



Doncaster, population 26,000. The farm is rented to a farmer at £2 

 per acre. The farm contains 264 acres. The cost of the works was 

 ;^50,ooo. Pumping is required. The expense is ^^"200 in excess of the 

 revenue derived, without including interest or sinking fund on first 

 outlay. Raw sewage applied. 



Croydon has a population of 96,000, has two sewage farms, each under 

 the management of a superintendent. The farms contain 525 acres. 

 The sewage is screened but receives no chemical treatment. The cost 

 of the works was ;^ 156,000. The annual expense including interest and 

 sinking fund is £y,oy4 per annum. The sanitary conditions are good. 



Bedford has a population of 25,000. The farm contains 223 acres. 

 It is in the hands of a manager who is paid a salary and also receives i % 

 commission on sale of produce. The sewage is applied in a raw state ; 

 annual deficit ;^243 ; no nuisance. 



Dewsbury, population 30,000. Intermittent filtration is the method 

 adopted. Effluent very pure ; people bathe in it. The farm contains 

 70 acres, and in favorable years, not too wet, pays its way, not including 

 interest on first cost. 



Merton, population 22,500. Farm contains 28 acres ; intermittent 

 filtration practised ; annual expense over revenue ^1,550. 



Chiswick, population 21,000, has the separate system. Gardeners take 

 the sludge free ; expense ^1,572 per annum ; no returns. 



Kingston-on-Thames, population 26,000. The sludge is manufactured 

 into a fertilizer by the Native Guano Company, who receive a bonus of 

 ;^2,442 per annum. This is the A, B, C process. 



Salford, population 176,000. Precipitation works. The sludge is 

 burnt ; annual expense, iJ^3,ooo. No returns. First cost of works, 

 ;^20,ooo, not included in the expense. 



Bradford, population 200,000. Pr-^cipit.ition with intermittent filtra- 

 tion ; no pumping required ; sludge given away ; annual expense, 



Sheffield, population 310,000. Cost of works, ^^65,000 ; yearly ex- 

 pense, i^6,ooo. 



Barnet, population 6,400. Sludge dug into the ground ; cost of works, 

 ;^io,ooo ; annual expense, £62^ ; no returns. 



