SEWAGE DISPOSAL 181 



already equipped with power to pump and elevate water, 

 there is apparently no reason why the dwelling should 



,not be equipped with a water closet. And with a water 

 closet in the house there would be practically no expense 

 connected with the disposal of the kitchen waste, since 

 this would be discharged directly into the soil pipe con- 



, nected with, the closet. What a convenience such an 

 equipment would afford to the housewife and members of 

 the family ! 



If the dwelling and dairy house are reasonably close 

 together, one septic tank will answer for both. In such 

 a case the tank is located between the two buildings. 

 Where a great distance separates the buildings, a tank 

 is provided for each and the outlets are brought together 

 as near the tank as possible to save extra expense of tile. 



SUBSURFACE IRRIGATION. 



While the septic tank sufficiently decomposes the 

 organic matter to leave the sewage from the tank without 

 offensive odors, it is best to run the discharge into a 

 system of underground tile where it will serve as a fer- 

 tilizer and as an irrigating agent. The tile should be 

 laid below the frost line. In loose soils one foot of tile 

 per gallon of sewage will answer. Clayey" soils require 

 two to three times this amount. 



Three-inch agricultural drain tile are best adapted for 

 drainage work of this kind, the tile being laid with open 

 joints and with a slope of three or four inches per hundred 

 feet. 



It is important that this subsurface irrigating system 

 be located where there is no seepage into the water supply. 

 In places where there is no danger from frost it is best 

 to lay the tile only about one and one-half feet below the 

 surface. 



