426. Risālah fī ḥarakat al-nayyirain. [Transcribed from MS. Thurston 3, f. 102r l. xiv - f. 103v l. xviii.]
434. 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.]
437. Risālah fī istikhrāj watar al-musabbaʻ. [Transcribed from MS. Thurston 3, f. 131r l. xxi - f. 131v l. xxvii.]