Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, presents a video orientation to LJS 388, an astronomical textbook arranged in two chapters with an introduction and containing five diagrams. Copy completed on 29 Rabīʻ al-Awwal 786 (29 May 1384, colophon, f. 19v).
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 