t ^6 ) 



ilioving of which a good workman will makd 

 at the bottom of the drain a femicircular con- 

 cavity, preferable to any other figure for ufe. 



Under-drains which run into the principal, 

 or outfall, will be found in general to anfwer 

 the purpofe, if made from twelve to fourteen 

 inches wide at top* You muft carefully take 

 off the fod, dig the neceflary depth, and laftlyi 

 with your gouge-fpade make the bottom from 

 four to fix inches deeper, of a femicircular con- 

 cavity. Leave the drains open, until you fee 

 that you have got a fufficient drip for the cur- 

 rent of the water : then take the fod, and lay it 

 grafs-fide downwards over the top of the nar- 

 row part: throw in mould upon the fod until 

 you have filled up the wide part equal to the 

 furface : and if the land is not intended to be 

 ploughed, let the mould which covers the drain 

 be properly pulverifed, and fown with grafs- 

 feeds, which will make a tough fod. This I 

 recommend as a good method : it will make 

 the drain lad for a confiderable length of time, 

 and be attended with little expence. If the 

 fod is of fuch a crumbling nature as to be apt 

 to break to pieces, fome fmali bits of elm or any 



other 



