Sharḥ-i bīst bāb-i asṭurlāb : manuscript / ʻAbd al-ʻAlī ibn Muḥammad ibn Ḥusayn al-Birjandī.

Collection of two treatises. 1. Sharḥ-i bīst bāb-i asṭurlāb (folios 1b-78b), "Commentary on Twenty chapters of the astrolabe" (in Persian), a treatise on the astrolabe (a medieval astronomical instrument used to observe the position of celestial bodies) by ʻAbd al-ʻAlī ibn Muḥammad ibn Ḥusayn al-Birjandī (active 16th century), an astronomer and a Ḥanafī "faqīh" (Islamic law scholar), who wrote in both Arabic and Persian, being a commentary on Bīst bāb dar maʻrifat-i aʻmāl-i asṭurlāb "Twenty chapters on knowing the uses of the astrolabe" of Naṣīr al-Dīn Muḥammad ibn Muḥammad al-Ṭūsī (1201-1274), a prolific author in many disciplines and the leading scholar at the court of the Mongol ruler Hulagu Khan (Hülegü, 1217-1265) in Marāghah (Āz̲arbāyjān-i Khāvarī, Iran). Copied on Tuesday night, 3 Ramaḍān, 1307 Hijrīyah (23 April, 1890) at al-Madrasah al-Nāṣirīyah, in Tehran (Iran). Name of copyist not mentioned (probably "Mullā ʻAbd al-ʻAlī Parjadī" who is mentioned in the incipit, but this could be a distortion of the name of the author "ʻAbd al-ʻAlī al-Birjandī"). 2. Followed by a short Arabic treatise (folios 78b-79b), a mathematical "lughz" (riddle or puzzle), by al-Shaykh Bahāʼ al-Dīn (Bahāʼ al-Dīn Muḥammad ibn Ḥusayn al-ʻĀmilī, 1547-1621), a Shīʻī scholar, who wrote in both Arabic and Persian on different subjects including mathematics and astronomy, born in Baʻalbak (Baʻlabakk, Lebanon) and lived and died in Iṣfahān (Iran). Name of copyist not mentioned, probably by the copyist of the first manuscript, and on the same date and in the same place.