PAL

Ptolemaeus Arabus et Latinus

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Work C.1.18a

Anonymous
〈رسالة في اختالافات وقوع الخطوط في الأشكال〉
〈Risāla fī Ikhtilāfāt wuqūʿ al-khuṭūṭ fī l-ashkāl〉

One of the three appendices that were frequently copied at the end of al-Ṭūsī’s Taḥrīr al-Majisṭī (C.1.18) in manuscripts that ultimately derive from an exemplar attributed to Quṭb al-Dīn al-Shīrāzī (cf. C.1.18b and C.1.18c, and see the note on these appendices in the description of C.1.18). Unlike the other two appendices, this work does not have a specific title; the title used here was added by a librarian in MS Istanbul, Süleymaniye, Ayasofya 2583. The treatise first illustrates the different configurations of the Mercury model in twenty figures. It is completed by three tables that display, respectively, all the intermediate steps of the calculation of the equation of centre and the maximum equation of anomaly of Mercury, and the values of the equation of centrum, the maximum equation of anomaly, and the maximum elongations of Venus and Mercury.

Text: [Istanbul, Nuruosmaniye, 2941]

(107v–108r) نريد أن نثبت اختلافات وقوع الخطوط في الأشكال التي تعرف منها أوضاع مراكز أفلاك عطارد في مسيراتها ومقادير أبعاد مركز التدوير عن مركزي العالم ومعدّل المسير ومقادير اختلافه الأوّل بحسب الأبعاد المختلفة ومقادير أبعاده العظام أيضًا بحسبها التي هي غايات اختلافه الثاني — \107v\ وا ك العمود الخارج من مركز العالم على الخطّ الواصل بين مركزي العالم والتدوير ويكون الأشكال بحسب مسير المركز بالحركة الوسطى مبتدئًا من الأوج إلى التوالي هكذا. [diagrams] \108r\ [tables]

Bibl.: FankhāMuṣṭafā Dirāyatī, Fihristgān-i nuskhahā-yi khaṭṭī-yi Īrān (Fankhā), 45 vols, Tehran: Library, Museum and Documentation Center of The Islamic Consultative Assembly, 20 2011, vol. II, pp. 376–377 and 383; ParraMª José Parra, ‘A List of Arabic Manuscripts of Naṣīr al-Dīn al-Ṭūsī’s Taḥrīr al-Majisṭī’, Suhayl 16–17 (2018–2019), pp. 251–322, pp. 254–255.

Ed.: None.

MSS