2 U Of Ploughs. Chap. XVIII. 



comings in our Terms, both cut of Tilth, and out of 

 Heart, 



Refp. If you know all this to be true, and that 

 without a Coulter you cannot break it up at all •, and 

 that with one Coulter you cannot any way cut .the 

 Furrow fmall enough, or lefs than Ten Inches broad; 

 why do not you cut it with Four Coulters, which will 

 reduce the fame Furrow into Four equal Parts, of 

 Two Inches and an half each in Breadth, and of the 

 Depth of the Staple, tho J that mould be Two Spit, 

 or Sixteen Inches deep ? 



Farm. How can that be done ? 



Refp. Every jot as eafily as with one Coulter : 

 For, before the Furrow is raifed by the Share, it lies 

 fart, and makes a fufficient Refiftance equally againft 

 the Edges of all the Coulters *, tho', after it be raifed 

 and loofe, it yields and recedes every way, except 

 downwards ; fo that it cannot be cut by any Edge, 

 but fuch as attacks it perpendicularly from above, as 

 that of the Spade does. 



Farm. This feems to me reafonable*, and, having very 

 lately heard talk of this Plough, I would gladly knozv 

 more of it. 



Refp. The Furrow, being cut into Four Parts, has 

 not only Four times the Superficies on the Eight Sides 

 which it would have had on Two Sides ; but ft is 

 alfo more divided crofs-ways ; viz. The Ground- 

 wreft prefies and breaks the lower (or Right-hand) 

 Quarter ; the other Three Quarters, in rifing and 

 coming over the Earth-board, mult make a crooked 

 Line about a Fourth longer than the ftrait one they 

 made before moved; therefore their Thinnefs not be- 

 ing able to hold them together, they are broken into 

 many more Pieces, for want of Tenacity to extend to 

 a longer Line, contrary to a whole Furrow, whole 

 great Breadth enables it to flretch and extend from a 

 Jhorter to a longer Line, without breaking; and, as 



ic 



