ABSTRACT
In half sheets, all the pages belonging to the white paper, and reiteration, are imposed in one chase. So that when a sheet of paper is printed on both sides with the same form, that sheet is cut in two in the short cross, if quarto or octavo, and in the short and long cross, if twelves, and folded as octavo, or twelves. Schemes of various other irregular sizes might also be introduced, but they could answer no other purpose than that of pleasing the fancy, by exhibiting the possibility of folding a sheet of paper into so many different forms. In making margin, some use the following method, for octavos; viz. they measure and mark the width of four pages by compasses, on a sheet of paper designed for the work, beginning to measure at one extremity of the breadth of the sheet.
