

74. LAYING A TILE DRAIN 



The dUch is four feet deep. The line of tiles is given a fall of one to four inches in 

 100 feet. The joints are fitted together carefully 



75. A TILE THAT HAS BEEN CLOGGED BY TREE ROOTS 



The whole drain may be obstructed in this way. Lay sewer pipe when the drain passes 

 near trees, and cement the joints 



