them, the plane Surfaces, betwixt these Two Lines and those Two pricked Lines, shew the Bevel of the Ends of these, which are inclined to each other upwards in an Angle of about Sixty-five Degrees. This double Bevel effectually prevents the Seed from arching in the Hole, before it gets into the Mortise of the Seed-box; and also, the Two upper Edges of the Ends of the Hole being nearer together than the lower, there is the more Wood left between these Edges and the Screws, which hold the Box to the Bottom, whereby the Board is less apt to split. Then the Box being screwed on to the Bottom, and thrust again into its Place, the Spindle, passing thro’ both the Hopper and the Box, keeps the Bottom in its Place: Then D, in _Fig._ 13. is the imaginary Plane of the Top or Mouth of the Hopper, being a rectangled Parallelogram, and parallel to the Bottom, to which the fore End is perpendicular, and a rectangled Parallelogram of the same Breadth. _Fig._ 15. shews the fore Side of the whole hinder Hopper, with its Two Cavities, and all its Accoutrements, except the Wheels; the Two Ends A and B being exactly alike, having each of them its Seed-box at the Bottom, in the same manner as in the one has been described. The Bar D holds together the upper Parts of this double Hopper at a right Distance, which is, when there is Ten Inches clear room betwixt the Two single ones. The Spindle E, passing thro’ the Whole, holds the Two single Hoppers by Four Wreaths, at the same Distance below, as they are held by the Bar above. These Four Wreaths are screwed on to the Spindle, to keep it from moving towards either End, as well as to hold the Hoppers in their Places: Two of which Wreaths are seen at _a_ and _b_; and the other Two are placed on the Outsides, as these Two are on the Insides. Before we proceed any farther in this Figure, it will be proper to shew the Wreaths, which are of Two Sorts. The one in _Fig._ 16. where A is its Hollow, which is circular, and must be of the same Diameter with the Spindle; and, being thrust on upon the Spindle, till it touch the Board, is fastened to the Spindle by a small Screw thro’ each of its opposite Holes, _a b_ shews the Breadth of this Wreath, whether it be made of Brass or Wood: It is little more than half an Inch. _b c d_ is the Part of it that goes against the Board: The Thickness of the Surface of this End which goes against the Board, is a quarter of an Inch, if made with Brass; but if with Wood, half an Inch; but the Thickness of its other End _a e f_ is less than its End _b c d_, by which means the Screws are the more easily turned in.