The fore Funnel C has its upper Edges Two Inches high above the Surface of the Plank. It is Five Inches Square at Top; its Four opposite Sides being Planes equally inclin’d to each other downwards, until they end at the Hole in the Bottom of the Funnel, which Hole is continued quite thro’ the Plank into the Trunk. The Shape of this Hole is shewn in _Fig._ 9. where the Four Lines _a b_, _b c_, _c d_, and _d a_, each Line being Three quarters of an Inch, make a true Square, and are the upper Edges of the Hole. The Three prick’d Lines _e f_, _f g_, and _g h_, being each of them longer than the former, tho’ as little as possible, make the Three lower Edges of the Hole; which being thus wider below than above, and having all its Sides true Planes and smooth, it is impossible for the Seed to arch therein. The fore Side of this Hole is perpendicular to the upper and lower Surfaces of the Plank, and, together with the Back of the Sheat, makes one Plane Surface. When we drill a large Species of Seed, as Peas or Oats, we can make this Hole a full Inch square at Top, and of the same Shape wider at Bottom; which tho’ it be wider than the Trunk, except at its Top, the Seed will not arch there, because there is room behind, the Plates being broader than the Sides of the Hole; for there can be no Arching in the Trunk, unless the Seed were confin’d behind as well as on each Side. The Holes of our Funnels ought to be of the same Shape with this described; tho’, as I am inform’d, the Pretenders to the making of this Plough make the Holes of their Funnels the Reverse of this; which being wrong-way upwards, the Seed is apt to arch in them, except the Holes are very large. Of this Plough, _Fig._ 1. the Two hinder Funnels E and F differ from the fore Funnel (which has been described), first, in Dimensions; these not being so deep, because they being made in the very Beams, their upper Edges are in the upper Surface of the Beams, and their Holes at the Bottom, being about the Eighth of an Inch deep. The Depth of the Funnels must want the Eighth of an Inch of the Thickness of the Beams; but we make each Funnel an Inch and a quarter broader at Top than its Beam, by adding a Piece of Wood to each Side of its Beam, which reaches down about half-way its Thickness; and these Pieces being firmly fix’d on by Nails, to the Sides of each Beam, the Legs of the Harrow take hold of these Pieces, which are in the Inside of these Beams. When the Plough is taken up to be turn’d, the Man who turns it takes hold of the Head of the Harrow with one Hand, and lays the other upon the Hopper, or Spindle, to keep it level, and to prevent either of the fore Wheels from striking against the Ground, whilst the Plough is turning round.