Bookbinding and the Conservation of Books
A Dictionary of Descriptive Terminology

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A sheet folded to form 24 leaves or 48 pages. There are several methods of producing a 24mo, one of the most common being to fold two sheets (separately) with two parallel folds in thirds, followed by a right angle fold, another parallel fold and insetting the second within the first. Also written 24mo or 24°.

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