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



The Rules, indeed, require much Labour, Study, 

 and Experience, to compofe them •, but when finifh'd, 

 will be moft eafy to praclife : Like the Rules for 

 meafuring Timber; their Ule is, at firft Sight, eafy 

 to every Carpenter, and to moil Artificers who work 

 in Wood -, but no illiterate Perfon is able to compofe 

 thofe Rules, or to meafure Timber without them. 



CHAP. XIX. 



The t)efcriptio?i of a Four-coulter'd Plough. 



-O defcribe all Parts of a Plough geometrically, 

 J|[ would require more Time and Learning than 

 J am Mailer of: Therefore leaving that to be done by 

 fomebody elfe, who is better qualified for it, I mail 

 at prefent attempt little more than what relates to the 

 Three added Coulters. 



In Plate i. Fig. i. is the Portrait of a common 

 Two-wheel'd Plough ufed in Berk/hire, HampJIoire^ 

 Oxford/hire, and Wiltjhire^ and in mod other Coun- 

 tries of South- Britain; and is generally efleemed the 

 befl Plough for all Sorts of Land, except fuch miry 

 Clays that flick to the Wheels, and clog them up, fo 

 as they cannot turn round. 



But they have, in fome Places, a Contrivance to 

 prevent this Inconvenience-, which is done by wind- 

 ing Thumb-ropes of Straw about the Iron Circles of 

 the Wheels, and about the Spokes. The Wheels 

 preffing againft the Ground, the Thumb-ropes are 

 diflended on each Side : which Motion throws off the 

 Dirt, and prevents its flicking to the Wheels, which 

 it would otherwife do. 



'Tis commonly divided into Two Parts ; viz, the 

 Plough -head-, and the Plough-tail. 



The Plough-head contains the Two Wheels A, B, 

 and their Axis or Spindle of Iron palling thro' the 



Box 



