PHYSICAL AND LITERARY, ^ir 



lies dead till expofed by fome accident 

 to the more immediate influence of the 

 weather. 



Th £ flat moors in Yorkfliire produce 

 many flriking examples of this ; for, 

 where on a level, they are covered with 

 nothing but heath ; but on the fiaes of 

 declivities, where the linie-ftone beds 

 break out to the day, there the fwaird 

 is green, and covered with the bed 

 kinds of grafs, the water that runs over 

 and waflies the lime-ftone, impregnating 

 all below, till it meets with an opportu- 

 nity of finking ; then the heath again 

 takes place, till a new bed breaks out ; 

 and it is moft remarkable, that all kinds of 

 cattle will feed fat in two thirds of the time 

 upon what is called a limc-ftone bottom, 

 that they will do upon any other unlimed 

 land; the fame effedl may be produ- 

 ced by bringing a fufficient coat of liir.?; 

 upon the furface of the heath or grafs. 



When we inrich old grafs by dung- 

 ing, the dung does not go down any 

 confiderable length, but will be found, 



Vol. in. I for 



