We make all our Spindles of clear-quarter’d Ash, without Knots or Crooks; and when they are well dry’d, and made perfectly round, and of equal Diameter from one End to the other, by the Prong-maker, we pay a Peny _per_ Foot for them at the first Hand, and they will now-and-then have something more for the largest Size; but we are only curious to have the middle Part of this long Spindle exact; for we graft on a Piece at each End, which does not require any Exactness: The Graftings are seen at _a a_ at one End, and _b b_ at the other End of the Spindle (in this _Fig._ 21.) by Four flattish Iron Rings driven on upon the grafted Parts, as they appear under those Letters in the Middle. Between each Pair of these Rings, we drive a small Iron Pin thro’ the Joints at _c_ and at _d_, to keep the Grafts from separating end-ways; and if they are not tight enough, we make them so, by Wedges driven in betwixt them and the Spindle. This fore Hopper is drawn by the Spindle, and the Spindle is drawn by the Two double Standards B and C, betwixt whose Forks it is placed, as appears in this Figure; the Distance between each Fork, or double Standard, being exactly the Diameter of the Spindle, so that the Spindle may have just room to rise and sink there, and no more. The Hopper and Spindle are guided, or kept in their Place, from moving end-ways, by Two Wreaths screw’d on to the Spindle, the one at _e_, and the other at _f_; each of which Wreaths, bearing against the Surfaces of both the Legs of each double Standard, on the Sides next to the Hopper, prevent the Spindle and Hopper from moving towards either End; and yet admit the Wheels, or either of them, to rise and sink without raising either Side of the Plough, contrary to what would happen, if the Wreaths were placed on the Outsides of the Standards next to the Wheels. We make these Wreaths a little different from the other Sort of Wreaths, which turn against the Holes; we make them of a greater Diameter, lest they should at any time get in betwixt the Legs of the double Standards, in case the Standards should be loose, or bend: Therefore we make the Diameter of each of these Wreaths, at least, Two Inches and Three quarters: We always make them of Wood, and of a peculiar Shape, taking off their Edges next the Standards, which Edges would be an Impediment to the Rising of one End of the Spindle without the other. So that, for making these Wreaths, we may form a Piece of Wood of the Shape of a Skittle-bowl (or an oblate Spheroid) having an Inch and Three-quarter Hole bor’d thro’ its Middle, and then cut by its Diameter (which is about Three Inches) in Two Halves, each of which will be one of these Wreaths; and they must be placed on the Spindle, with their convex Sides bearing against their respective Standards. The Diameter of the fore Wheels is about Thirty Inches, as the Diameter of the hinder Wheels is about Twenty-two.