Elegant copy of a treatise on the construction and use of an astronomical instrument called Ṭabaq al-manāṭiq, in two sections (see description of contents in preface, fol. 5b-6b). In the preface the author explains that Ghiyāth al-Dīn Jamshīd [ibn Masʻūd al-Kāshī] (d. 832/1429) designed an instrument to determine the distance between the stars. The author claims to have constructed and tested such an instrument. The Risālah is dedicated to Sulṭān Bāyazīd II (r. 886-918/1481-1512) (fol. 5a). According to E.S. Kennedy (1960), the work is largely a translation of selected parts from Nuzhat al-ḥadāʼiq, a treatise in Arabic by Jamshīd ibn Masʻūd al-Kāshī.
