Sullam al-samā سلم السماء (al-Risālah al-kamālīyah الرسالة الكمالية)

An astronomical treatise on the sizes and distances of the planets and fixed stars by Ghiyāth al-Dīn Jamshīd Ibn Masʿūd ibn Maḥmūd al-Kāshī (غياث الدين جمشيد بن مسعود بن محمود الكاشي, d. 1429 or 1436). The text was composed in 1407 and was dedicated to the vizier Kamāl al-Dīn Maḥmūd (كمال الدين محمود, see f. 1v, lines 27-28), after whom the treatise was also entitled the Treatise for Kamāl (الرسالة الكمالية).