3 jo Of the Wheat-Drill Chap. XXI. 



welded on to the other Two Pieces* and cut off to 

 the Length, form the Share, with its Socket, more 

 exact than it can be made out of one Piece of Iron. 



Now we return to the firft Figure ; where the Fore- 

 fheat being flx'd up at equal Diftance from each End 

 of the Plank, and as near to the hinder Edges of it 

 as can be, allowing room for the Funnel G to ftand 

 with the Fore-fide of its Hole, to make one Surface 

 with the Back of the Sheat, and for the hinder Part 

 of the Trunk not to reach the Edge of the Plank, 

 there muft be alfo room for the Fore-ftandard D to 

 fland perpendicular to the Plank, acrofs the Tenon of 

 the Sheat. 



This Standard being clofe to the Fore-fide of the 

 Fore Hopper, there muft be fo much room between 

 it and the Hole of the Funnel, that the Seed may drop 

 from the Seed-box into the Middle of this Hole. 

 Thus much for placing the Fore-fheat. 



Next, for the Two hinder Sheats ; they muft be 

 placed at equal Diftance from the Sides of the Beams, 

 and fo near to the hinder Ends of the Beams, that 

 there may be room to make the Funnels in them, and 

 their Tenons to come up between their refpective 

 Funnels E and F, and their refpeclive Standards G and 

 H, which Standards muft be fet perpendicular to the 

 Beams. 



The Diftance of thefe Sheats from the Plank muft 

 be fuch, that the Wheels of the hinder Hopper may 

 not ftrike againft the Plank, nor againft the Spindle 

 of the fore Hopper; and the Semidiameters of thefe 

 Wheels being Eleven Inches, there ought to be a Foot 

 between the Centre of each Wheel and the Plank •, but 

 we fometimes cut Notches in the Plank, to prevent 

 the Circle of the Wheels from coming too near the 

 Plank. 



For the nearer the hinder Sheats ftand to the Plank, 

 the better; but thefe Beams may be placed nearer to, 

 or farther from the Plank, by their Screws and Nuts, 

 at Pleafure. Thele 



