Such Marking-wheels are necessary for drilling upon the Level; but not for drilling upon Ridges.
E is the Beam, Two Feet Two Inches and an half long, Four Inches broad, and Two Inches thick: It is thus broad, that the Screws which hold on the cross Piece F, may be farther asunder: The Screws must be placed as near as may be to the Outsides of the Beam, and at equal Distance from each Side of the cross Piece; by which means the Standards are kept the firmer from Turning.
The Distance between the Plank and the cross Piece is Eleven Inches. The Breadth of the cross Piece is Two Inches and a quarter. This cross Piece is shewn apart in [Fig. 2.] where its Two Standards A B, are each Seventeen Inches long (or high), and each on its fore Side and hinder Side One Inch and a quarter broad, and nearly Three quarters of an Inch thick: They are shoulder’d and pinn’d into the cross Piece at a b. The cross Piece is Thirteen Inches and an half long, and one Inch and a quarter thick in the Middle from c to d; but for about an Inch on the Inside of each Standard is Two Inches and an half thick, that the Standards may have the more Wood to support them, and that the Hopper, bearing upon the thicker Parts of the cross Piece, may be held up above the Funnel, that the Fork of the brass Spindle may not strike against it, when the Plough is taken up to be turn’d, there being a little more than a quarter of an Inch of the Breadth of the cross Piece behind the Standard, for the Hopper to rest on.
The whole Distance between the Standards is Nine Inches and a quarter. The Standards must be exactly perpendicular to their cross Piece: Their Tops are drawn up each to a Point, as at e and f, by which the Hopper is the more easily put on upon them.
The Funnel, Sheat, Share, and Trunk, are the same as those in the Wheat-drill, except a few Differences: As G in [Fig. 1.] is the same as the fore Sheat of the Wheat-drill, with its Accoutrements; only it is lower, being but Eight Inches high from the Bottom of the Share up to the Beam; and the Plates of the Trunk are somewhat narrower: Its Tenon passes thro’ the Beam, and comes up above it, betwixt the Funnel and the cross Piece; and there is pinn’d in thro’ its Hole above the Beam. There is no want of Wood behind the Sheat, the Funnel not being cut in the Beam, but placed upon it.
The Funnel is shewn apart in [Fig. 3.] and is Two Inches deep, Four Inches square at Top; its Four Sides terminating at an Hole in the Bottom, half an Inch broad from a to b, and near an Inch long from c to d, which Length is divided in the Middle, by the upper Edge of a Brass Spout, which divides the Hole into Two equal Parts (or Holes), each of which is about half an Inch square; this Funnel being screw’d on upon the Beam by Two Wood Screws, entering at Two opposite Corners of the Funnel, as at c d in [Fig. 1.] so that the Seed may drop from the Seed-box upon the right Side of the Funnel at e, which being about half an Inch distant from the Partition, and equidistant from both Holes, the Seed rebounding is pretty equally distributed to each of the Holes.
The fore Part of the foremost Hole being equal with the Back of the Sheat, the Beam being cut thro’; so that the Back of the Sheat, and the fore Part of the Hole thro’ the Beam, and the fore Part of this Hole, make one plain Surface, whereby the Seed that falls into this foremost Hole, descends to the Ground, near the Back of the Sheat, thro’ the Trunk.
