This style of type is sometimes used for making up tabulated statements where it is desired to crowd a large number of figures to the inch. _Pica._ This is the most generally used type of any. It manifolds quite well up to six and seven copies. It is possible to write only ten figures of this size to the inch. _Medium Roman._ This is the next larger size type than the pica and, on account of it being larger, it gives better manifolding results. It also writes ten letters to an inch. _Large Roman._ This is the size type which is used by railroad and steamship companies for typewriting their way-bills. It is possible to write only eight letters to an inch. [Illustration: Fig. 21. Forms Showing Properly Designed Stationery ] _Gothic Type._ The term _Gothic_ indicates the style, and not the size of the type. If the small points at the top and bottom of the Roman type were removed (these points are called _serifs_) the effect would be that of Gothic type. A very pleasing combination on a billing machine is two different sizes of Gothic type, the larger size to be used for capital letters, the smaller size for the small (or lower case) letters. Recent practice has demonstrated the value of using capital Gothic letters of one size, as it increases the legibility of an order or an invoice. In manifolding, numerals should always be of the "open" kind, that is, 1 2 3 4 5 6 7 8 9 0, and not _1 2 3 4 5 6 7 8 9 0_, as the former are much the more legible. =Carbon Paper.= There is no article which is so generally misused in the commercial world and which is so little understood as carbon paper. In order that the correct usage may be clearly understood a brief description of its manufacture is given. The chief ingredients of carbon paper are oil, wax, paper, and color. Oils and waxes are used to give wearing surface, elasticity, and body to the color mixture. Tissue paper—generally of imported quality—with a fine, strong fiber is used. The quality must be first class in order to insure absence of holes and other imperfections in the sheets. Generally the sheets are cut 20 x 30 inches. A ream is regarded as containing 500 sheets. Three weights of paper are used, 4lb., 7lb., 10lb., respectively, meaning that 500 sheets of the above size of paper will weigh the number of pounds named, according to the thickness of the paper.