466. Risālah fī ṣanʻat al-asṭurlāb bil-ṭarīq al-ṣināʻī. [Transcribed from MS. Thurston 3, f. 122v l. i - f. 124r l. xvi.]
467. Risālah fī sāʻāt al-maʻmūlah ʻalá ṣafāʼiḥ al-asṭurlāb, faṣl 1 only. [Transcribed from MS. Thurston 3, f. 119v.]
471. Risālah fī tafḍīl al-sawād wa-dhikr shayʼ mimmā ikhtaṣṣa bihi quṭr al-Hind wa-al-Sind ʻalá sāʼir al-aqṭār