Into the Inner-side of this _Tympan_ is fitted the _Inner-Tympan_, whose three sides are also made of Wood, and its fourth side of Iron, as the _Tympan_, but without _joynts_; it is made so much shorter than the _Outer-Tympan_, that the outer edge of the Iron of the _Inner-Tympan_ may lye within the inner edge of the Iron on the _Outer-Tympan_; and it is made so much narrower than the inside of the _Tympan_, that a convenient room may be allowed to paste a _Vellom_ between the inside of the _Tympan_, and the outside of the _Inner-Tympan_. About the middle, through the hither-side of the _Inner-Tympan_, is let in and fastned an Iron Pin about a quarter of an Inch over, and stands out three quarters of an Inch upon the hither outside of the _Inner-Tympan_, which three quarters of an Inch Pin fits into a round hole made in the inner-side of the _Tympan_, to gage and fit the _Inner-Tympan_ right into the _Tympan_; for then by the help of an Iron turning _Clasp_ on the further side the _Tympan_, the _Inner-Tympan_ is kept firmly down and in its position. ¶. 11. _Of the_ Inck-Block, Slice, Brayer, _and_ Catch _of the_ Bar, _marked_ c d e f _in_ Plate 7. To the _Rail_ between the hither _Cheek_ and _Hind-Post_ is fastned the _Inck-Block_, which is a Beechen-board about thirteen Inches long, nine Inches broad, and commonly about two Inches thick, and hath the left-hand outer corner of it cut away; it is Railed in on its farther and hinder-sides, and a little above half the hither-side, with Wainscot-Board about three quarters of an Inch thick, and two Inches and an half above the upper-side the board of the _Inck-Block_. It is described in Plate 7. at c. The _Brayer_ marked _a_ is made of _Beech_: It is turned round on the sides, and flat on the bottom, its length is about three Inches, and its diameter about two Inches and an half; it hath an Handle to it about four Inches long. Its Office is to rub and mingle the _Inck_ on the _Inck-Block_ well together. The _Slice_ is a little thin Iron _Shovel_ about three or four Inches broad, and five Inches long; it hath an Handle to it of about seven Inches long. Near the _Shovel_ through the Handle is fitted a small Iron of about two Inches long standing Perpendicular to both the sides of the Handle, and is about the thickness of a small Curtain-Rod. It is described at e.