Chap. XIX. The Four-coulter d Plough. 303 



*o falls on the left-hand Side of the Plough : This is 

 no Injury; but yet it is prevented, by letting the Se- 

 cond Coulter (land a lighter higher than the Third ; 

 and then the Second Furrow, holding the Firft at its 

 Bottom, will carry it over, together with kklf, on 

 the right Side by the Earth-board ; but yet never fet 

 this, or any of the Three added Coulters, fo high 

 that they may not cut through the Turf. But as for 

 the firft Coulter, tho' it mould cut but an Inch or 

 Two within the Ground, the Share will break off the 

 firft Furrow in raifing it up. 



Remember, as often as the Point of any Coulter 

 is worn too fhort, that you drive down the Coulter 

 with a large Hammer, carried for that Purpofe; and 

 when it is driven low enough, faften the Wedges 

 again, fo as to keep the Coulters in their right Poftures, 

 that their Incifions may be all of them equidi- 

 "iant. 



Fig. iS. Is a Nut, with Two of its oppofite Cor- 



lers turn'd up, by which it is driven round by 'a 



lammer, and has fo great a Force, that Three of 



:hem, with their Screws properly placed, hold the 



'iece, Fig. 16. as fa ft to the Plough-beam, as if they 



>oth were made of one Piece of Wood ; but as 



often as the Wood fhrinks in dry Weather, the Nuts 



muft be fcrew'd farther on, both here and in all other 



Places where they areufed: particularly, thole which 



hold up the Retch ; for if the Sheat fhould once get 



loofe, there is no Cure but by a new one. 



Betwixt this Nut and the Wood, there fhould be a 

 thin Iron Bolfter, about the Thicknefs of a Shilling, 

 broader than the Nut, to prevent the Nut from eating 

 into the Wood, efpecially when it is to be often fcrew'd, 

 as on the Retch of thefe Ploughs, and molt of all on 

 the Hoe-plough-, but fometimes we ufe a Piece of 

 Shoe-leather inftead of an Iron Bolfter. 



Note, There muft be Iron Plates upon all the 

 Coulter-holes both above and below, Three of which 



arc 



