59 



the sewage receives preliminary treatment before being distributed on 

 the fields. 



A casual survey of the Reformatory grounds showed at once that the 

 lay of the land was so favorably arranged that the seAvage coiild be col- 

 lected and di.strilmted by gravity. At no point would there need l)e any 

 pumping; and yet when it came to malce an accurate survey, including 

 the levels, it was found that tliere were a number of quite ditficult points 

 to settle as to the best lines for the sewers to take in order to collect the 



Field to be irrisnted and fertilized l)j- effluent from Peptic Tank, a 



main drive. 



material from all the family buildings, and it was hnally thought ad- 

 visable to make two main lines of sewers, one leading to the fields north- 

 east of the Reformatory, and the other following in general the line of 

 the old sewer from the out-building in a southeasterly direction. Each 

 one of these sewers ends in a septic tank in which the sewage undergoes 

 a certain fermentation, and only the clear, or comparatively clear effluent 

 passes out of the septic tank as an inoffensive liquid, very useful in irri- 

 gating the fields. Of course, this eflluent from the septic tank is not as 

 rich in fertilizing properties as the raw sewage would be, but it is free 



