:7. YORKSHIRE. i6i 



through the feveral coats ; and, whenever 

 the roots decay, a perforation mufl be left. 



Mould taken from a dry found highland 

 fituation is in all human probability lefs li- 

 able to propagate aquatic weeds than the 

 earth of a low fituation or a bog *. 



The mould being rendered level and 

 fniooth, the fiones are laid on : firil: cover- 

 ing the mould with the largeft, laid with a 

 flat fide downward, to prevent their finking 

 down to the clay ; and upon thefe laying 

 fmaller, until the coat be made five or fix 

 inches thick -|-. 



A Fave- 



■■' I have obfcrvcd an ingenious and fimple metliod 

 of keeping the weeds under ; efpecially at the edges,'^ 

 where they are generally moft abundant. Though all 

 the lides of a drinking pool be open, cattle will go to 

 particular places to drink ; and in thefe places the 

 Weeds arc trampled upon and killed. Therefore, to 

 check the rankeft, the parts which are moft free are 

 covered with thorns, while thofe which are weedy are 

 left open for the cattle to drink at. 



t S/t-aw has been ufed between the clay and the 

 flones ; and, in the inrtance (mentioned in a fore- 

 going note) in which an improved method of lirainp^ 

 was praftifed, a layer of thick /.dj was laid grafs-fide 

 downward up )n the lime ; and upon the fods about fix 

 inches thick of lo.fe ftoncs. 



Vol. I. U 



