But again, if the _Mouth-Piece_ be made too wide, _viz._ the _Jaws_ too deep at the _Mouth_, though the _Geat_ of the _Ladle_ does the readier find it, yet the _Body_ of the _Break_ of the _Letter_ will be so great, that first it heats the _Mold_ a great deal faster and hotter; and secondly, it empties the _Pan_ a great deal sooner of its Metal, and subjects the Workman sometime to stand still while other Metal is melted and hot: Therefore Judgment is to be used in the width of the _Mouth_; and though there be no Rule for the width of it; yet this in general for such _Molds_ as I make, I observe that the _Orifice_ of the _Throat_ may be about one quarter of the Body for small Bodies; but for great Bodies less, according to Discretion, and the _Palate_ about an Inch and a quarter long from the _Body_ and _Carriage_. The reason that the _Orifice_ of the _Throat_ is so small, is, because the Substance at the end of the _Shanck_ of the Letter ought also to be small, that the _Break_ may easier break from the _Shanck_ of the Letter, and the less subject the _Shanck_ to bowing; for the bowing of a Letter spoils it; and the reason why the _Palate_ is so long, is, that the _Break_ being long, may be the easier finger’d and manag’d in the breaking. If it be objected, that since the smalness of the _Break_ at the end of the _Shanck_ of the Letter is so approvable and necessary for the reason aforesaid, then why may not the _Break_ be made much more smaller yet? The Answer will be, No; because if it be much smaller than one quarter of the Body, Metal enough will not pass through the _Throat_, to fill both the _Face_ and _Shanck_ of the Letter, especially if the Letter to be cast prove thin. Near the _Throat_ and _Jaw_ is made straight down through the _Palate_ a square Hole (as at _k_.) This square Hole hath all its Sides on the _Upper-Plain_ of the _Palate_ opened to a _Bevel_ of about 45 Degrees, and about the depth of a thick _Scaboard_. Into this square _Hole_ is fitted a square _Pin_ to reach through it; and within half a _Scaboard_ through a square _Hole_, made just under it in the _Bottom-Plate_ which the _Mouth-Piece_ lies upon. On the upper end of this square _Pin_ is made a square _Sholder_, whose under-sides are filed _Bevil_ away, so as to comply and fall just into the _Bevil_ made on the _Palate_ aforesaid, and on the under end of the _Pin_ is made a _Male-screw_ long enough to contain a square _Nut_, with a _Female-screw_ in it about a _Pica_ or _English_ thick, which _Nut_ being twisted about the _Pin_ of the _Male-screw_, draws and fastens the _Mouth-piece_ close down to the _Bottom-Plate_, and also close to the _Carriage_ and _Body_ of the _Mold_.