Of Ploughing. 



305 



ploughing an acre and a half, with a. furrow-slice of nine 

 inches, is 29,040 yards. 



With a furrow-slice of eight inches, 32,640 ditto. 



, The following tables are given from the same authority, 

 founded on the above principle of calculation. 



TABLE, shewing the Quantity of Ground ploughed, accord- 

 ing to the different Breadths of the Furrow-Slices, and 

 the Rates of the Horses walking. 



It is supposed, that in England in general, the common 

 breadth of the furrow-slice is about nine inches ; but the 

 generality of the farmers in Norfolk, for various reasons, 



u 



