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original: "LOGICA"
original: "SIVE"
original: "ARS COGITANDI". This is the famous "Port-Royal Logic," an influential handbook on logic and philosophy originally written in French by Antoine Arnauld and Pierre Nicole.
A faint, oval-shaped library stamp or printer's mark is visible in the lower center of the page, containing illegible text and a small decorative border.
original: "LUGDUNI BATAVORUM". This is the Latin name for Leiden, a major center for printing and scholarship in the Netherlands.
original: "MDCLXXXII"