Typography has a great advantage over other branches of printing in the cheapness of its materials. Type-metal is cheaper by weight than copper or steel, or the finer quality of lithographic stone: by measurement, it is cheaper than the box-wood used by engravers. Types are cheaper than engraved letters. A pound of the types by which this page is printed contains about 320 pieces of metal, the cost of which is but 48 cents. Types are made of many forms or faces, but they are always of uniform height, and are always [p024] truly square as to body, so that they can be fitted to each other with precision, and can be interchanged with facility. The expense of combining types in words is trivial, as compared with the cost of engraving for lithographic or for copper-plate printing. An employing printer’s price for the composition of a page like this would be, at the high rates of New-York city, $1.10. The engraving of such a page, by any method, would cost at least three times as much as the types and their composition. If never so carefully done, the engraved letters would not be so uniform, nor so satisfactory to the general reader, as the types. The engraved letters would cost more, but they could be used only for the work for which they were made. In typographic printing, there is no such restriction as to use, and no such loss of labor. It is only the labor of composition which need be lost; the types remain, but little more worn, or little less perfect, than when they were first put in use. [Illustration: Letter H, from a Em, or full square Face of the letter as it type of Canon body. of Canon body. appears on the body. The Face of a Large Type, showing the manner in which the Letter is placed on the Body.[2]] The labor of composition is not always lost. A page of movable types can be used for a mould, from which can be made a stereotype plate of immovable letters. Stereotyping is a cheap process. A plate of this page of type can be had for about one-half the cost of the composition. The stereotype plate has all the advantages pertaining to an engraving on a lithographic stone, and it is more durable and portable. [p025] Typography has a marked advantage in the greater ease with which printing types are inked. In the copper-plate process, the plate must be first blackened over the entire surface, and then cleansed with even greater care, before an impression can be taken. This labor cannot be intrusted to machinery, but must be done by a practised workman. The inking of a lithographic stone is as difficult: the stone must be moistened before the inking roller can be applied. This double operation of inking and cleansing, or of inking and moistening, is required for every impression. The inking of types is done by a much simpler method; one passage, to and fro, of a gang of rollers over the surface is sufficient to coat them with ink. The types need no previous nor after application. [Illustration: