Dot Porter, Curator, Digital Research Services at the University of Pennsylvania Library, offers a video orientation to Penn Library’s LJS 296, Īḍāḥ al-maqāṣid li-farāʼiḍ al-fawāʼid. This manuscript was written in Iran in A.H. 720 (1320), in Arabic, by Kāshī, ʻImād al-Dīn Yaḥyá ibn Aḥmad and it is a mathematical treatise with frequent marginal notes by multiple hands.

You can see the full online facsimile of this work in Penn in Hand and you can download all of the images and metadata at OPenn.