Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 472, Ḥeshbon mahalkhot ha-kokhavim, by Abraham bar Hiyya Savasorda. This manuscript was written in Spain during the 15th century, in Hebrew, and it is a copy of the second part of a 12th-century two-part treatise. This second part, on astronomy, includes computations for solar and lunar eclipses between 1135 and 1136.
See the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata at OPenn. You can also download a copy of this video from ScholarlyCommons, the University of Pennsylvania’s open access institutional repository.