Chap. XXL Of the Wheat-Drill. 34^ 



the Tenon cut off even with the upper Surface of the 

 Beam: This Tenon ftands more oblique than that of 

 the fore Sheat, that there may be the more Wood 

 between its Mortifeandthe Funnel, its hinder Shoulder 

 being fhort: Its fore Shoulder at a muft be very fhort, 

 not above the Eighth of an Inch ; but its Shoulder 

 b Three quarters of an Inch. The Tenon is alfo 

 fhoulder'd on each Side, as well as before and behind. 

 The.Thicknefs of this Sheat mould be greater than 

 that of the Fore-meat, becaufe it is much narrower. * 

 The Depth of this Sheat, is lefs than the Fore-fheat, 

 by the Depth of the Beam : It is, in all other refpedts, 

 the fame with the Fore-fheat, except that it and its 

 Share are fhorter. The Socket of this Share is but 

 an Inch and One-eighth long, its Breadth half an 

 Inch, and from the Fore-part of the Bottom of the 

 Socket to the End of its Tail, but three Inches. Its 

 Point from the Socket at Bottom is but Three quarters 

 of an Inch, whereas the Point of the Fore-fhare is an 

 Inch and Three quarters: There is but one Hole 

 whereby the Share is faftened up to the Sheat. Its 

 Trunk is no wider than the other \ for we cut a Rab- 

 bet on each Side of the Sheat, that the Plates, which 

 are the Sides of the Trunk, may come within Three 

 quarters of an Inch of one another. Its Tenon, being 

 narrower than the Tenon of the Fore-meat, muft be 

 thicker than it. 



The other Hinder-meat, and all its Accoutrements, 

 muft be the fame as this of Fig. 7. 



The Workman muft take care, that the Tenons of 

 the Sheats be not made crofs the Grain of the Wood; 

 and therefore muft make them of crooked Timber. 



Fig. 8. fhews how the Share is made of Four Pieces ; 

 of which a is a Piece of Sceel for the Point, its larger 

 End being cut bevel for the Shape of the Fore-end of 

 the Socket, b is a Piece of Iron for the other End 

 of the Share, from the Socket to the Tail : The other 

 Two Pieces c and d are the Iron Sides, which, being 



welded 



