The manuscript Ambrosiana H 57 sup. includes two texts on the astrolabe, Philoponus’s as well as an anonymous one from perhaps the late 13th century (though this copy is dated 14th century). Along with these texts are a couple Ptolemaic works and Theon of Alexandria’s “Commentarium paruum in Ptolemaei canones.” The manuscript itself is lovely […]
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Monks Using Astronomical Instruments
