Note 431 — TREATISE OF NAVIGATION OF THE CHEVALIER ANTONY PIGAFETTA.
Henry Edward John Stanley Stanley translation
I do not find any mention of the mediclino in any writer of the times near that of Pigafetta who have treated of the astrolabe, such as Regiomontanus, Appianus, Gimma Frisius, Danti, Clavius, etc.; but from what our author says here and elsewhere, it appears that the mediclino is that movable rule, fixed on the centre of the astrolabe, which turns round it, and is named sometimes albidade, or dioptron, or traguardo, or linea di fiducia. Note, Milan edition.