l82 



ENGINEERING FOR LAND DRAINAGE. 



socket joints secured by cement mortar. The bottom 

 section should be a straight pipe, the upper two sec- 

 tions should have T's, one of which should be used 

 for an outlet and the other for an inlet. A 2 -inch 

 plank cover fitted and dropped into the top socket fin- 

 nishes a neat and desirable catch-basin. See Fig. 35, 



■^44#J 



Outlet 



zzzz; 



777^ 



Fig, 35. — Catch-basin constructed of Sewer-pipe. 



These catch-basins will require some personal at- 

 tention at times. Straws and other surface rubbish from 

 the surface ditch will gather against the inlet and must 

 be removed. The mud which accumulates in the bot- 

 tom of the basin should be removed from time to time. 

 It is, however, a useful and convenient accessory to 

 drainage work. 



Drainage of Cellars and Residence Grounds. 



Cellars which are excavated in clay or loam soils 

 usually become wet and require drainage, A common 



