5422. Risālah fī bayān al-muqaddimatain muhmalatai al-bayān ista ʻmalahā Abūlūniyūs fī awākhir al-maqālat al-ūlá min Kitāb al-Makhrūṭāt.
5424. [Risālah] fī bayān [?al-]ʻālamay al-rūḥānī wa-al-jismānī [attribd. to al-shaikh al-Yūnānī = ? Plato].
5430. Risālah fī ḥarakat al-nayyirain. [Transcribed from MS. Thurston 3, f. 102r l. xiv - f. 103v l. xviii.]
5433. Risālah fī istikhrāj daqāʼiq ḥudūd ikhtilāf manẓar al-qamar al-mustaʻmalah fī al-Majisṭī. [Transcribed from MS. Thurston 3, f. 93v l. xviii - f. 94r l. xii.]
5436. Risālah fī istikhrāj watar al-musabbaʻ. [Transcribed from MS. Thurston 3, f. 131r l. xxi - f. 131v l. xxvii.]