Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, presents a video orientation to LJS 407, a collection of astronomical works by Naṣīr al-Dīn al-Ṭūsī, which include material on sunset and sunrise, the size of the earth, the moon, the distance to the moon, the distance between the sun and the planets, movement of the spheres, and eclipses. Some marginal notes in another hand, affected by trimming. LJS 407 is undated; perhaps copied in the 16th century.
You can read the complete record for this document (and find links to digitized copies) on Franklin. You can also download a copy of this video from ScholarlyCommons, the University of Pennsylvania’s open access institutional repository.
The Schoenberg Institute for Manuscript Studies 