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

LEADS.

Leads form an essential part of a printer’s outfit, since it is scarcely possible to set up a single page or job in which they may not be usefully employed; but their chief purpose is for spreading the lines apart so as to reduce the amount of matter in a page. Fine works are always thus leaded. They are usually cast by letter-founders in a long mould, and then cut to the required lengths. The bodies are regulated by Pica standard, and they are usually cast four, six, or eight to Pica, but are occasionally varied from one down to fourteen to Pica. Leads for jobbing purposes are now cut to graduated lengths, like labour-saving rule.