Note 22 — Chapter VI · MANUSCRIPT BOOKS16 MS. Books: Tools & Materials — Methods & Proportions — The Size & Shape of the Book — The Widths of the Margins — The Size of the Writing, &c. — Ruling — MS. Books: General Remarks.
Reading edition
They are often ruled double (see p. 343), and sometimes the top and foot lines are ruled from edge to edge of the sheet.