But yet I think it very convenient to have a _Summer_ also, the more firmly and surer to keep the _Cheeks_ together; This _Summer_ is only a Rail _Tennanted_, and let into Mortesses made in the inside of the _Cheeks_, and Screwed to them as the Rails described, _Numb._ 15. §. 4. are Screwed into the Stiles of the _Case-Frame_; Its depth four Inches and an half, and its breadth eight Inches, _viz._ the breadth of the _Cheeks_. ¶. 5. _Of the_ Head _marked_ e _in_ Plate 5. The length of the _Head_ besides the _Tennant_ at either end, is one Foot nine Inches and one quarter of an Inch; The breadth eight Inches and an half, and its depth eight Inches. The Top, Bottom and Hind-sides are tryed Square, but the fore-side projects half an Inch over the Range of the fore-sides of the _Cheeks_; in which Projecture is cut a Table with a hollow Molding about it, two Inches distant from all the sides of the fore-side of the _Head_: Its _Tennants_ are three Inches Broad, and are cut down at either end, from the top to the bottom of the _Head_, and made fit to the Mortesses in the _Cheeks_, that they may slide tight, and yet play in them. In the under-side of the _Head_ is cut a square Hole, (as at _a_,) about four Inches square, and three Inches and an half deep, into which the _Brass-Nut_ is to be fitted: And to keep this _Nut_ in its place (lest the weight of it should make it fall out) is made on either side the square hole, at about half an Inch distance from it, (as at _b b_) a square Hole quite through the Top and Bottom of the _Head_ about three quarters of an Inch wide; and into this square Hole is fitted a square piece of Iron to reach quite through the _Head_, having at its under-end a Hook turned square to claspe upon the under-side of the _Nut_; and on its upper end a Male-Screw reaching about an Inch above the upper-side of the _Head_, which by the help of a Female-screw made in an Iron _Nut_, with Ears to it to turn it about draws the _Clasp_ at the bottom of the Iron _Shank_ close against the _Nut_, and so keeps it from falling out. In the middle of the wide square Hole that the _Nut_ is let into, is bored a round Hole through the top of the _Head_, of about three quarters of an Inch wide, for the _Press-man_ to pour _Oyl_ in at so oft as the _Nut_ and _Spindle_ shall want _Oyling_. At three Inches from either end of the _Head_ (as at _c c_) is bored a Hole quite through the top and bottom of the _Head_, which holes have their under ends squar’d about two Inches upwards, and these squares are made so wide as to receive a square Bar of Iron three quarters of an Inch square; But the other part of these Holes remain round: Into these Holes two Irons are fitted called the _Screws_. The Shanks of these _Screws_ are made so long as to reach through the _Head_ and through the _Cap_: At the upper end of these Shanks is made Male-screws, and to these Male-screws, Iron Female-screws are fitted with two Ears to twist them the easier about.