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 sewage could be col- 

 lected and distributed by gravity. At no point Avould there need Ite any 

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

 the levels, it was found that there were a number of quite dilticult points 

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



Field to be iriig:ited ami fertilized by effluent from Peptic Tank, as seen finin main drive. 



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

 visaljle to make tAvo main lines of sewers, one leading to the fields north- 

 east of the Reformatory, and the otlier following in general tlie 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 efHuent 

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

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

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



