The American Printer: A Manual of Typography / Containing practical directions for managing all departments of a printing office, as well as complete instructions for apprentices; with several useful tables, numerous schemes for imposing forms in every variety, hints to authors, etc.

by Thomas MacKellar

Inner Form of a Sheet of Eighteens, with Two Signatures.

Inner Form of a Sheet of Eighteens, with Three Signatures.

A Half-Sheet of Eighteens, without Transposition.

This mode of imposition is very objectionable, as there will be, when the paper is cut up, three single leaves.

A Half-Sheet of Twenties, with Two Signatures.