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Sides of hills, where there is a natural out^ 

 fall, are eafily drained : it may be efFedually 

 done, at little expence, by under-draining.-— 

 But where the land is nearly flat, niuch art and 

 management is required* On fuch land fur- 

 face-draining is certainly preferable : and if it 

 beneceflary to make your outfall fo deep as to 

 endanger cattle or fheep, it may ferveforafencc. 

 The art of draining is carried to very great per- 

 feflion in my native county of Lincoln, where 

 the engineers now rival, if they do not excel, 

 the Dutch. 



In a flat country furface-drains may in very 

 dry feafons be made ufeful, where there is an 

 opportunity of conveying water fo as to fil! 

 them; for in that cafe the foil is fed by the wa- 

 ter which oozes from them. This method is 

 pra6tifed in the north marfnes of the county of 

 Lincoln; and a conftant fupply of frefh water 

 conveyed, when wanted, by ilows with gates 

 or doors to keep up the water at proper times 

 above the level of the grips or drains, which 

 of courfe fills them, and feeds the land on each 

 fide* 



Tkere 



