The conveniencies of a deep _Case_ is, that it will hold a great many _Letters_, so that a _Compositer_ needs not so often _Destribute_. 2dly. It is not so soon _Low_, (as _Compositers_ say when the _Case_ grows towards empty) and a _Low Case_ is unconvenient for a _Compositer_ to work at, partly because the _Case_ standing shelving downwards towards them, the _Letters_ that are in the _Case_ tend towards the hither-side of the _Case_, and are shadowed by the hither side of that _Box_ they lye in, so that they are not so easily seen by the Eye, or so ready to come at with the Fingers, as if they lay in the middle of the _Box_. These _Cases_ are encompassed about with a _Frame_ about Three quarters of an Inch broad, that the ends of the several partitions may be let into the substance of the _Frame_: But the hithermost side of the _Frame_ is about half an Inch higher than the other sides, that when either the _Galley_ or another pair of _Cases_ are set upon them, the bottom edge of the _Galley_, or of those _Cases_ may stop against that higher _Frame_, and not slide off. Both the _Upper_ and the _Lower-Case_ have a thick Partition about three quarters of an Inch broad, Duff-tail’d into the middle of the upper and under Rail of the _Frame_. This Partition is made thus broad, that Grooves may be made on either side of it to receive the ends of those Partitions that devide the breadth of the _Case_, and also to strengthen the whole _Frame_; for the bottom Board is as well nailed to this thick Partition as to the outer _Frame_ of the _Case_. But the devisions for the several _Boxes_ of the _Upper_ and _Lower- Cases_ are not alike: for each half of the whole length of the _Upper-Case_ is devided into seven equal parts, as you may see in Plate 1. at A, and its breadth into seven equal parts, so that the whole _Upper-Case_ is divided into Ninety eight square _Boxes_, whose sides are all equal to one another. But the Two halfs of the length of the _Lower-Case_ are not thus devided; for each half of the length of the _Lower-Case_ is devided into Eight equal parts, and its breadth into Seven; but it is not throughout thus devided neither; for then the _Boxes_ would be all of equal size: But the _Lower-Case_ is devided into four several sizes of _Boxes_, as you may see in Plate 1. B. The reason of these different sizes of _Boxes_ is, That the biggest _Boxes_ may be disposed nearest the _Compositers_ hand, because the English Language, and consequently all English _Coppy_ runs most upon such and such Sorts; so that the _Boxes_ that holds those Sorts ought to be most capacious. His care in the choice of these _Cases_ is, That the Wood they are made of be well-season’d Stuff. That the Partitions be strong, and true let into one another, and that the ends fill up and stand firm in the Grooves of the _Frame_ and middle _Rail_ of the _Case_.