Collection of two treatises on astronomical instruments, one in 65 short chapters (see table of contents at the beginning of the text, fol. 2b-3a and in Ahlwardt, W. Verzeichnis der arabischen Handschriften, no. 5836) attributed to Qusṭā ibn Lūqā, the other comprising an introduction and 33 chapters (bāb) on an astronomical instrument called the celestial globe (same as Ahlwardt, W. Verzeichnis der arabischen Handschriften, no. 5869 and King, D. Fihrist al-makhṭūṭāt al-ʻilmīyah, 4/2/7.2). The text is followed on fol. 17a by a Faṣl fī al-dāʼir bayna al-ẓuhr wa-al-ʻaṣr wa-al-dāʼir bayna al-ʻaṣr wa-al-ghurūb.