_Fig._ 13. shews the Outside of the Figure last describ’d. A is the Standard by which this End of the Hopper is drawn, in the manner as it is here placed. B is one End of the Spindle passing thro’ the Hopper and Seed-box. C the Bottom, having the Seed-box fastened on to it, with one Screw before, and another behind, with their Nuts underneath, and the Heads of their Screws very thin, and the Pins square at Top, that they may not turn in the Wood; and their Heads must either be let into the Wood, even with the Surface, or else the Sides B C of the Hopper must be cut for these Heads of the Screws to pass in under them. This bottom Board, which holds the brass Seed-box, is Four Inches broad, and full half an Inch thick, and at each End a quarter of an Inch longer than the Seed-box: This Piece is first thrust in sliding upon the Two added Pieces of Board, until its fore End comes under the fore Side of the Hopper, and its hinder End under the hinder Side; then setting the Hopper with its Bottom upwards, the Spindle being thro’ the Seed-box, and Holes of the Hopper, we hold the Seed-box hard upon the Bottom, at equal Distance from each End of it, whilst the Holes are bored thro’ the Bottom, by the Holes at each End of the Seed-box; and then the Screws, being put thro’, screw on the Box; and when that is done, we make a Mark upon the bottom Board, with the Compasses, on each Side of the Brass Box, beginning from the Ends of the Axis of the Tongue, reaching as far backwards as is the Length of the Mortise: These Two Lines or Marks are a Direction for cutting the Hole in the Bottom of the Hopper, thro’ which the Seed descends into the Seed-box; then we pull out the Spindle, then draw out the Bottom, take off the Seed-box, and cut the Hole in the Bottom in the manner I will now describe in _Fig._ 14. where the Two pricked Lines _a b_ and _c d_ are the lower Edges of the Hole, and the same with the Two Lines mentioned to be marked by the Sides of the Seed-box. The pricked Line _a d_, being at right Angles with the Two former, is the lower Edge of the fore End of the Hole, and exactly over the Axis of the Tongue, and parallel to it. The pricked Line _b c_ is the lower Edge of the hinder End of the Hole, which is just over the hinder End of the Mortise, and parallel and equal to the last-mentioned pricked Line: These Four pricked Lines are the lower Edges of this Hole, contiguous to the Seed-box. The Two Lines _e f_ and _g h_ are the upper Edges of the Sides of the Hole, which, being farther asunder than the lower Edges, make the reverse Bevel of this Hole; which may be determined by this, that the Surface between these Two upper and lower Edges, being Planes, are inclined to one another downwards, in an Angle of about One hundred and Thirty Degrees. The Two Lines _e g_ and _f h_, at right Angles with the Two last-mentioned Lines, make the upper Edges of the Ends of this Hole; and, being nearer together, than the pricked Lines under