4 A TREATISE OF 



trenches being filled up within about half 

 a yard of the top of the border, with 

 . either fmall ftones, pieces of bricks, faggots 

 of black thorns, broom, or Hng, &c. and 

 covered with earth even v/ith the other part 

 of the border, will be a means to keep it 

 dry. 



I have kQTi trenches made clofe by the 

 w^alls, in order to drain land, but they an- 

 fwered not the end ^ for they were not of 

 a fufficient depth, neither could they be 

 made deeper, without weakening the foun- 

 dation : and as thefe trenches were fo fhal- 

 low, the roots of the trees are apt to ftrike 

 . into them, which, being in winter generally 

 filled with a Iharp running, and at other 

 times in fome parts with a cold ftagnant 

 water (their bottoms not being made with 

 a due defcent) greatly injured the trees, 

 and fometimes killed them. 



For, having an opportunity of feeing a 

 tree that was dead, where thefe trenches 

 were made, 1 examined the roots, and 

 found the extreme parts of them covered 

 with iharp fand ; from whence I conclud- 

 ed, that the aforefaid waters occafioned 

 its death. 



To 



