Chap. XXI. Of the Wheat-Brill. 3 77 



to be nail'd into the lower Part of the Trunk, with 

 its mod acute Angle upper mod-, the other in Fig. 26. 

 (hews the fame, and its Back- fide a £, that is to be 

 nail'd to the Back of the Shear, being of the fame 

 Breadth with it ; its Bottom b c being the Breadth of 

 the Plates, on their Infide, the Angle c coming out 

 backwards, juft as far as the Plates: The Depth of 

 this Piece from a to c is uncertain, becaufe the Plates 

 of fome Trunks are broader than of others. The 

 Ufe of this Piece is, to fill up the lower Part of the 

 Trunk ; fo that the Seed, dropping upon the oblique 

 Side of this Piece of Wood, may by it be turn'd 

 into the Chanel, after fo much Mould is fallen in it, 

 as will fufflciently leflen its Depth, whereby the Danger 

 of burying the Seed is avoided : And fuch a Piece of 

 Wood placed into each Trunk, I think, is preferable 

 to Ground-wrids, which are commonly ufed for this 

 Purpofe; becaufe the Ground- wrifts leave the Chanels 

 too wide and open. 



But when only the Two hinder Sheats are ufed for 

 St. Foin, we can make their Chanels the fhallower, 

 by finking the Limbers by their Chain, fo much as 

 that, the Plough bearing moil upon the fore Share, 

 the hinder Shares will go the fhallower. 



When we drill hilly Ground, both up and down, 

 we cover the hinder Parts of all the Trunks, from 

 their Tops, to within Two or Three Inches of the 

 Ground, to prevent the Seed's falling out far behind 

 the Trunk, in going up Hill ; and this we do either 

 by a "Piece of Leather nail'd to each Side of a Sheat, 

 the Middle of the Leather bearing againft the hinder 

 Part of the Plates (or Trunk); oriometimes, inilead 

 of Leather, we ufe Tin. 



Every Trunk being thus inclos'd behind, we can 

 clrill up and down an hill of a moderate Afcent; but 

 when it is very deep, we never drill any thing but 

 §t. Foin on it, and that by a Drill made for the Pur- 

 pofe 3 fo very light, that a Man may carry it up the 

 * Hi!} 



