al-Ifādah al-khaṭīrah fī mabḥath nisbat sab‘ sha‘īrah

[On the proportion between the height of the highest mountains on the surface of the earth and the diameter of the latter, a dissertation on a passage in the commentary of Mūsa ibn Maḥmūd al-Rūmī on Maḥmūd ibn Muḥammad al-Jaghmīnī's compendium of astronomy entitled al-Mulakhkhaṣ.].