In its middle it hath a round Hole about two Inches and an half wide, as at b, for the Shank of the Spindle to pass through.
At seven Inches and a quarter from either end, and in the middle between the fore and Back-side, is made two square Holes through the Till, as at c c, for the Iron Hose to pass through.
¶. 7. Of the Hind-Posts marked a a in Plate 6.
At one Foot distance from the Hind-sides of the Cheeks are placed upright two Hind-Posts, they are three Foot and four Inches long besides the Tennants, which Tennants are to be placed in the Mortesses in the hinder-ends of the Feet; Their thickness is four Inches on every side, and every side is tryed square; But within eight Inches of the top is turned a round Ball with a Button on it, and a Neck under it, and under that Neck a straight Plinth or Base: This turn’d work on the top is only for Ornament sake.
There are six Rails fitted into these Hind-Posts, two behind marked a b, one of them standing with its upper-side at two Inches below the turned Work, the other having its upper-side lying level with the upper-side of the Winter.
These two Rails are each of them Tennanted at either end, and are made so long, that the outsides of the Hind-Posts may stand Range or even with the outer-sides of the Cheeks; These Tennants at either end are let into Mortesses made in the insides of the Hind-Posts, and Pin’d up with half Inch wooden Pins, Glewed in, as was shewn Vol. 1. Numb. 5. §. 17. Because the two Hind-Posts need not be separated for any alteration of the Press.
The two Side-Rails on either side the Press are Tennanted at each end, and let into Mortesses made in the Cheeks and Hind-Posts, so as they may stand Range with the outer-sides of the Cheeks and Hind-Posts; But the Tennants that enter the Mortesses in the Cheeks are not pin’d in with Wooden Pins, and Glewed, because they may be taken assunder if need be; But are Pin’d in with Iron Pins, made a little tapering towards the entring end, so as they may be driven back when occasion serves to alter the Press: And the Tennants that enter the Mortesses in the Hind-Posts are fastned in by a Female-screw, let in near the end of the Rail, which receives a Male-screw thrust through the Hind-Posts, even as I shew’d in
§. 4. the Fore and Back-Rails of the Case-Frames was.
¶. 8. Of the Ribs marked b in Plate 6.
The Ribs lye within a Frame of four Foot five Inches long, one Foot eleven Inches broad; its two End-Rails one Inch and an half thick, its Side-Rails two Inches and an half thick; and the breadth of the Side and End-Rails two Inches and an half. But the Side-Rails are cut away in the inside an Inch and an half towards the outer-sides of the Rails, and an Inch deep towards the Bottom sides of the Rails, so that a square Cheek on either Side-Rail remains. This cutting down of the Outer-Rails of the Frame is made, because the Planck of the Carriage being but one Foot eight Inches and an half broad, may easily slide, and yet be gaged between these Cheeks of the Rail, that the Cramp-Irons Nailed under the Carriage Planck joggle not on either side off the Ribs, as shall more fully be shewn in the next §.