t 353 ] 



idly. The holes in the pillar S, are for the pillar-pins 

 V V, to alter the direction of the beam of the plough, 

 cither to the furrow or land, according as the furrows 

 want to be thrown cither flat or round. The fame ufe is 

 made of the notches in the gate Y. 



^dly. The holes in the beam (B) by which the beam- 

 ring and breaft-iron (QJ are fixed to the beam by the 

 beam-nail (AB) and alfo by the beam-pin and chain, (W) 

 which is fixed to the top of the ftandards in the centre, 

 thefe unite the plough and breaft-work together. By thefe 

 holes the plough is regulated ; and fo nice are the plough- 

 men in Norfolk in ploughing to a proper depth where there 

 are little inequalities in the land, and upon fuch juft me- 

 chanical principles is it conftructed, that a quarter of an 

 inch alteration in the beam -nail and beam-pin will be per- 

 ceived in the going of the plough either deeper or Ihal- 

 jower. This will fcarcely be credited, but I aflert it upon 

 my own knowledge. The breaft-pin drawn up half its 

 length, and the beam-nail turned upon its oppofite quarter, 

 frequently in ploughing a fallow, is enough to fink the 

 plough perceptibly. By thefe means, one of thefe ploughs 

 will plough almoft to any depth, or barely fkim the furface. 



4//;/v. The coulter N, when fet properly, the point 

 mould be about three inches for the mare, and in fuch a 

 direction, that a line {trained at the hinder part of the 

 fide-iron to the point of the coulter, mould juft free the 

 fide of the (hare. This is the rule the ploughmen fet it by. 



yhly. The plough-line panes from the outfide ring of 

 the bit of the halter of the one horfe, through a ring in the 



heams, 



