Therefore before the sinking and justifying the _Matrices_, the _Mold_ must first be _Justified_: And first, he justifies the _Body_, which to do, he casts about twenty _Proofs_ or Letters, as they are called, though it matters not whether the _Shancks_ have yet Letters on them or no. These _Proofs_ he sets up in a _Composing-stick_, as is described in §. 17. ¶. 2. Plate 19. at G, with all their _Nicks_ towards the right Hand, and then sets up so many Letters of the same _Body_, (which for Distinction sake we will call _Patterns_) that he will justifie his _Body_ too, upon the _Proofs_, with all their _Nicks_ also to the right Hand, to try if they agree in length with the same Number of Letters that he uses for his _Pattern_; which if they do not, for very seldom they do, but by the Workman’s fore-cast are generally somewhat too big in the _Body_, that there may be Substance left to _Justifie_ the _Mold_, and clear it from _Ragging_. Therefore the _Proofs_ may drive-out somewhat, either half a Line (which in _Founders_ and _Printers_ Language is half a _Body_) or a whole Line. (more or less.) He also tries if the two sides of the _Body_ are parallel, _viz._ That the _Body_ be no bigger at the _Head_ than at the _Foot_; and that he tries by taking half the number of his _Proofs_, and turning the Heads of them lays them upon the other half of his _Proofs_, so that if then the _Heads_ and _Feet_ be exactly even upon each other, and that the Heads and Feet neither _drive-out_, nor _get in_, (_Founders_ and _Printers_ Language, for which see the Table) the two sides of the _Body_ are parallel; but if either the _Head_ or _Foot drives out_, the two sides of the _Body_ are not parallel, and must therefore be mended. And as he has examin’d the Sides of the _Body_ so also he examines the thickness of the Letter, and tries if the two Sides of the thickness be also parallel, which to do, he sets up his _Prooves_ in the _Composing-stick_ with their _Nicks_ upwards. Then taking half of the _Prooves_, he turns the _Heads_ and lay the _Heads_ upon the _Feet_ of the other half of his _Prooves_, and if the _Heads_ and _Feet_ lies exactly upon each other and neither _drive out_ or _get in_ the two Sides of the thicknesses are parallel. But if either the _Head_ or _Foot_ _drive-out_ the two Sides of the thicknesses are not parallel; and must therefore be mended. Next, he considers whether the sides of the _Body_ be straight, first by laying two Letters with their _Nicks_ upwards upon one another, and holding them up in his Fingers, between his Eye and the Light, tries if he can see Light between them: For if the least Light appear between them, the _Carriage_ is not straight. Then he lays the _Nicks_ against one another, and holds them also against the Light, as before: Then he lays both the _Nicks_ outward, and examines them that way, that he may find whether either or both of the _Carriages_ are out of straight.