Facsimile — Gloss

Font: A complete set of type in a given design (called a “typeface”) and size, i.e., 12-point Garamond or 14-point Caslon. Pieces of type that all represent the same letter are called “sorts.” A font might contain different numbers of different sorts, which were provided proportional to their use. Since they were made of metal, fonts were quite heavy: a font of roman type might weigh 243 kilograms (or about 536 pounds).

Format: Properly, the relationship between the printed page and the sheet of paper on which it was printed. Paper was delivered to the printer in sheets, which were printed with a certain number of pages. The sheets of paper were then folded and/or cut to produce gatherings of different numbers of leaves. Formats are numbered based on how many leaves they contain; counterintuitively, the larger the number of leaves in a book, the small the resulting format will be. The most common formats are the folio (2º), the quarto (4º), and the octavo (8º), but smaller formats were possible as printers could keep folding their paper. Formats smaller than octavo are comparatively rare and are usually just referred to with a number and the syllable “mo”; the most commonly named ones are 12mo, 16mo, 24mo, 32mo, 64mo, and 128mo. A 128mo book requires seven folds and produces 128 leaves out of a single sheet of paper: producing one is not for the faint of heart.