The sheet being imposed, the stone should be cleared; the saw and saw-block put in their places, the shears, the mallet, planer, and shooting-stick, the surplus furniture, the leads, the quoins, and every other article. The compositor will tie up his page-cords, and, if he has any companions, will return to them their proportion. The chase and furniture of one form should always be used for a similar form; that is, the chase and furniture of the outer form should be again used for an outer form, and the chase and furniture of the inner form should be again used for an inner form; they should also be put round the pages in the same order in which they were put about those of the preceding forms. For want of care or thought in these apparently trifling circumstances, trouble, inconvenience, and loss of time frequently occur; for the register will be almost sure to be wrong when this is neglected, and then the forms must be unlocked and the leads changed, to correct the fault. _Before the form is printed, a proof should be taken and the sheet folded, to make sure of the correctness of the imposition._ The preceding rules and directions were intended for type-forms, and were formerly of universal necessity. Now most books are printed from stereotyped or electrotyped plates. The same instructions, however, are generally as applicable to plate as to type pages. NOMENCLATURE OF SHEETS. When a sheet of paper of Medium or larger size is folded in two leaves, like most newspapers, it is called a _folio_; when folded in four leaves, it is named a _quarto_ or _4to_; when folded in eight leaves, an _octavo_ or _8vo_; in twelve leaves, a _duodecimo_ or _12mo_; in sixteen leaves, _sextodecimo_ or _16mo_; in eighteen leaves, _octodecimo_ or _18mo_; in twenty-four leaves, _vigesimo-quarto_, or _24mo_, and so on. The Latin names beyond _duodecimo_ are seldom used. [Illustration] [Illustration: Abstract Title-Deeds of Estates. Abstract Title-Deeds of Estates are printed with blanks at the back, with all the margin on the left side, and on single leaves, which are stitched together at the corner. This method of imposing the form is to save presswork and the compositor’s charge.] [Illustration: A Single Sheet of Folio.] [Illustration: Two Sheets of Folio, Quired, or lying one in another. _=Outer Form of the Outer Sheet.=_ _=Outer Form of the Inner Sheet.=_