1GO 



U-JSSONS IN AGRICULTURE 



tiles should be placed about three feet below the sur- 

 face, so that the water level in the ground will be low- 

 ered to this point, and that the ground may be cultivated 

 without interfering with the tiles. The size of the tile 

 and the distance apart of the mains and branches will 



FIG. 48. LAYING TILE 



depend upon the slope of the land and the nature of 

 the soil. 



Farmers' Bulletins 



No. 40. Farm Drainage. 



\o. 187. Drainage of Farm Lands. 



Table showing average cost of drainage tile in large quan- 

 tities: 



3 in. tile cost about 3c each. 



4 in. tile cost about 4c each. 



5 in. tile cost about 5c each. 



6 in. tile cost about 6c each. 

 All sizes are 12 inches in length. 



