Cod.: brown paper, II+232 ff. (foliated with Arabic-European numerals in pencil, written over an identical earlier foliation with Hindu-Arabic numerals up to f. 148r; f. 36 mistakenly bound between ff. 46 and 47, ranges of blank folios indicated by Turkish ‘Boş’ (‘empty’) in pencil; an earlier foliation with red Hindu-Arabic numerals running parallel to the first foliation from ff. 1 to 150 and numbering ff. 153–228 from 1 to 76, repeated in pencil at the bottom of the versos; quire numbers in abjad in the upper left corner of every twelfth recto, with some irregularities and starting anew from f. 153 onwards; no catchwords). One main neat naskh hand in black, more careless towards the end; partially dotted ductus, no shaddas or hamzas. Occasional marginal corrections and red markers for the beginning of a new treatise. Many diagrams with geometrical points in black; some reserved spaces for diagrams (34v, 56v, 193v, 228v). A table in black (116r). Four short treatises were written by different black, mostly undotted naskh hands in different formats on initially empty folios (57r–57v, 191v–193r, 206v–207v, and 228r–229r); the first of these is dated 755/1354-5. Codex in bad condition; severe corrosion of the paper caused by the ink, cover slightly damaged, minor moisture stains. Dimensions: 22×12.5 cm; 32 lines per page (29 lines on ff. 121r–145v). Type III binding.

Cont.: mathematics, astronomy, astrology, philosophy, meteorology, medicine. — Index: the manuscript is divided into three parts with separate titles in different hands: treatises by Thābit b. Qurra (ff. 1–116), al-Kūhī (or: al-Qūhī) (ff. 121–144), and al-Kindī (ff. 153–end). Various sketchy notes (Iv–IIr); table of contents of the first two parts including works by Thābit ibn Qurra, Abū Sahl al-Kūhī, and others, indicating the folio numbers of their beginnings with Hindu-Arabic numbers in red (1r); Thābit b. Qurra, Risāla fī Kayfa yanbaghī an yuslak ilā nayl al-maṭlūb min al-maʿānī al-handasiyya (1v–4r); Thābit b. Qurra, Kitāb fī Qutūʿ al-usṭuwāna wa-basīṭi-hā (4r–26r); Thābit b. Qurra, Kitāb fī Misāḥat qaṭʿ al-makhrūṭ alladhī yusammā l-mukāfī (26v–35v); Thābit b. Qurra, Kitāb al-Mafrūḍāt (35v–39r, 46r–v); Thābit b. Qurra, Risāla fī l-Ḥujja al-mansūba ilā Suqrāṭ fī l-murabbaʿ wa-quṭri-hi (39r–41r); Thābit b. Qurra, Kitāb fī Misāḥat al-ashkāl al-musaṭṭaḥa wa-l-mujassama (41r–44r); Thābit b. Qurra, Kitāb fī l-Shakl al-mulaqqab bi-l-qiṭāʿ (44r–45v, 47r–49v; see Lorch, p. 24); Thābit b. Qurra, Risāla fī Dhikr al-aflāk wa-ḥalaqi-hā (or: khalqi-hā, see Morelon, p. 19) wa-ʿadad ḥarakātihā wa-miqdār masīrihā (50r–51r); Thābit b. Qurra, Kitāb fī anna-hu idhā waqaʿa khaṭṭ mustaqīm ʿalā khaṭṭayn mustaqīmayn fa-ṣayyara al-zāwiyatayn … (51r–52r); Ptolemaica (52r–53v); Thābit b. Qurra, Min kalām Thābit b. Qurra fī l-hayʾa (53v–54r; cf. Morelon); Ptolemaica (54v–56v); Abū l-Barakāt al-Baghdādī, Risāla fī Ruʾyat al-kawākib bi-l-layl lā bi-l-nahār (57r–57v, not included in the table of contents, ascribed to Avicenna; see GAS VI, p. 280 n. 2); Thābit b. Qurra, Maqāla fī Talkhīṣ mā atā bi-hi Arisṭūṭālis fī kitābi-hi Fī-mā baʿd al-ṭabīʿa (60v–62r); Ibrahīm b. Sinān, Kitāb fī Ālāt al-aẓlāl (66v–75v); Ibrahīm b. Sinān, Kitāb fī Misāḥat al-qaṭʿ al-mukāfī (76v–79r, not listed in the table of contents); al-Qabīṣī, Risāla fī anwāʿ al-aʿdād (85v–88r); al-Qabīṣī, Risāla fī l-Abʿād wa-l-ajrām (88v–94r); al-Qabīṣī, Mā sharaḥa-hu l-Qabīṣī min Kitāb al-Fuṣūl li-l-Farghānī (94v–114v); al-Nayrīzī, Risāla fī Aḥdāth al-jaww (114v–116r); title of the second part of the codex: Majmūʿa fī-hā kutub wa-rasāʾil wa-stikhrājāt li-Abī Sahl Wījan b. Rustam al-Kūhī (121r, in a different hand); Abū Sahl al-Kūhī, Risāla fī ʿAmal mukhammas mutasāwī l-aḍlāʿ fī murabbaʿ maʿlūm (121v–123v); Abū Sahl al-Kūhī, Masʿalatān handasiyyatān (123v–125v); Abū Sahl al-Kūhī, Risāla fī stikhrāj misāḥat al-mujassam al-mukāfī (125v–129r); two questions by al-Ṣābiʿ with the replies by Abū Sahl al-Kūhī (129v–140r); Abū Sahl al-Kūhī, Ziyādāt li-kitāb al-Muʿṭayāt li-Uqlīdis (140v–144v); Abū Sahl al-Kūhī, Risāla fī stikhrāj ḍilʿ al-musabbaʿ (145v–147v, with two versions of the incipit); Abū Sahl al-Kūhī, Istikhrāj khaṭṭayn bayna khaṭṭayn ḥattā tatawālā ʿalā nisba … (147v); table of contents of the third part including works of al-Kindī, indicating the folio numbers of their beginnings with Hindu-Arabic numbers in red (153r); al-Kindī, Risāla fī l-ʿIlla al-fāʿila li-l-madd wa-l-jazr (153v–157r); al-Kindī, Risāla fī Waḥdaniyyat Allāh wa-tanāhī jirm al-ʿālam (157r–158r); al-Kindī, Risāla fī l-Ibāna ʿan anna ṭabīʿat al-falak mukhālifa li-ṭabāʾiʿ al-ʿanāṣir al-arbaʿa (158r–159r); al-Kindī, Risāla fī ʿIlla al-lawn al-lāzuwardī alladhī yurā fī l-jaww fī jihat al-samāʾ (159r–160r); al-Kindī, unknown fragment (160r); al-Kindī, Risāla fī l-Jirm al-ḥāmil bi-ṭibāʿihi l-lawn min al-ʿanāṣir al-arbaʿa wa-lladhī huwa ʿillat al-lawn fī ghayri-hi (160v–161r); al-Kindī, Risāla fī Māhiyyat al-nawm wa-l-ruʾyā (161r–163r); al-Kindī, Risāla fī l-ʾIlla allatī la-hā yabrudu aʿlā l-jaww wa-yaskhunu mā qaruba min al-arḍ (163v–165r); al-Kindī, Risāla fī Īḍāḥ tanāhī jirm al-ʿālam (165r–166r); al-Kindī, Risāla fī l-ʿIlla allatī la-hā takūnu baʿḍ al-mawāḍiʿ lā takād tumṭar (166v–167r); al-Kindī, Risāla fī ʿIllat kawn al-ḍabāb (167r–167v); al-Kindī, Risāla fī l-Sabab alladhī nasabat al-qudamāʾ al-ashkāl al-khamsa ilā l-ustuqussāt (167v–169v); al-Kindī, Risāla fī l-Suyūf (170r–173v); anonymous, ʿAmal sayf ʿajīb jiddan (173v); al-Kindī, Risāla fī ʿIllat al-thalj wa-l-barad wa-l-barq wa-l-ṣawāʾiq wa-l-raʿd wa-l-zamharīr (174r–174v); al-Kindī, Risāla fī l-ʿaql (174v–175r); al-Kindī, Risāla fī anna-hu jawāhir lā ajsām (175v–176r); al-Kindī, Risāla fī l-Ḥīla li-dafʿ al-aḥzān (176r–179v); al-Kindī, Risāla fī Kammiyat kutub Arisṭūṭālīs wa-mā yuḥtāj ilay-hi fī taḥsīl al-falsafa (180r–183r); al-Kindī, Risāla fī anna l-ʿanāṣir wa-l-jirm al-aqṣā kuriyyat al-shakl (183r–184r); al-Kindī, Risāla fī l-Ibāna ʿan sujūd al-jirm al-aqṣā wa-ṭāʿati-hi li-llāh ʿazza wa-jalla (184r–186v); al-Kindī, Kalām fī l-Nafs mukhtaṣar wajīz (186v, not included in the table of contents); al-Kindī, Kalām fī l-Tarkīb (187r, not included in the table of contents); al-Kindī, Hal yajūzu an yutawahham mā lā yurā (187r, not included in the table of contents); al-Kindī, Kitāb fī l-Ibāna ʿan al-ʿilla al-fāʾila al-qarība li-l-kawn wa-l-fasād (187v–191r); Ibn al-Haytham, Risāla fī l-Tarbīʿ al-dāʾira (191v–193r, not included in the table of contents); Abū Sahl al-Kūhī, Risāla fī Maʿrifat mā yurā min al-samāʾ wa-l-baḥr (193v–194r, not included in the table of contents); al-Kindī, Kitāb fī l-Falsafa al-ūlā (196r–206r); al-Kindī, Risāla fī Ḥudūd al-ashyāʾ wa-rusūmi-hā (206v–207v); al-Kindī, Risāla fī Māhiyyat mā lā yumkin an yakūna lā nihāya wa-mā lladhī yuqāl lā nihāya la-hā (208r–208v); al-Kindī, Risāla fī l-Fāʿil al-ḥaqq al-awwal al-tāmm wa-l-fāʿil al-nāqiṣ alladhī huwa bi-l-majāz (208v); al-Kindī, Risāla fī l-Qaḍāʾ ʿalā l-kusūf (209r); al-Kindī, Kitāb al-Bāh (209v–211r); al-Kindī, Risāla fī stikhrāj al-muʿammā (211r–216v); al-Kindī, Risāla fī l-Lutgha (216v–218r, beginning missing); al-Kindī, Risāla fī Īḍāḥ wijdān abʿād mā bayna al-nāẓir wa-markaz aʿmidat al-jibāl wa-ʿulūw aʿmidat al-jibāl (218v–222r); Banū Mūsā, Muqaddimāt kitāb al-Makhrūṭāt (223v–226v); Abū l-Fatḥ Muḥammad b. ʿAbd al-Malik al-Dawānī (?), untitled, on a proof by the Banū Mūsā (226v–227v); ʿUmar ibn al-Muẓaffar, untitled work on arithmetic (228r–229r; see Ritter, p. 370). Blank: 58r–60r, 62v–66r, 76r, 79v–85r, 116v–120v, 145r, 148r–152v, 194v–195v, 222v–223r, 229v–232v.

Bibl.: Hellmut Ritter, ‘Schriften Jaʿqūb ibn Isḥāq al-Kindī’s in Stambuler Bibliotheken’, Archiv Orientální 4 (1932), pp. 363–372; KrauseMax Krause, ‘Stambuler Handschriften islamischer Mathematiker’, Quellen und Studien zur Geschichte der Mathematik, Astronomie und Physik, Abteilung B: Studien 3 (1936), pp. 437–532, pp. 453–456 etc. (cf. the index on p. 529); Muḥammad Taqī Dānishpazhūh, Fihrist-i mīkrūfīlmhā-yi Kitābkhāna-yi Markazī-yi Dānishgāh-i Tihrān, vol. I, Tehran: Dānishgāh-yi Tihrān, 1969 (1348 H.S.), pp. 467–472 (film 436); Giuseppe Celentano, Due scritti medici di al-Kindī, Napoli: Istituto Orientale di Napoli, 1979, pp. 2–6; Régis Morelon, Thābit ibn Qurra. Œuvres d’astronomie, Paris: Les Belles Lettres, 1987, pp. xxxvii–xxxviii; Richard P. Lorch, Thābit ibn Qurra. On the Sector-Figure and Related Texts, Frankfurt am Main: Institut für Geschichte der Arabisch-Islamischen Wissenschaften, 2001, pp. 23–24; David C. Reisman and Amos Bertolacci, ‘Thābit ibn Qurra’s Concise Exposition of Aristotle’s Metaphysics: Text, Translation, and Commentary’, in Roshdi Rashed (ed.), Thābit ibn Qurra. Science and Philosophy in Ninth-Century Baghdad, Berlin / New York: de Gruyter, 2009, pp. 715–776, here pp. 725–728; Paul Hullmeine, ‘Die Istanbuler Handschrift Ayasofya 4832. Meteorologische Themen und Methoden im Bagdad des 3./9. und 4./10. Jahrhunderts’, Das Mittelalter 29 (2024), pp. 19–36. Facsimile of this manuscript in Fuat Sezgin, Jan Hogendijk and Fabian Käs, Codex Ayasofya 4832. A Collection of Mathematical, Philosophical, Meteorological, and Astronomical Treatises by Thābit ibn Qurra, Abū Yūsuf Yaʿqūb al-Kindī, Abu l-Ṣaqr al-Qabīṣī, Abū Sahl al-Kūhī, and Others. With A Survey of Important Studies on Codex Ayasofya 4832, Frankfurt am Main: Institut für Geschichte der Arabisch-Islamischen Wissenschaften, 2010 . — Yazma Eserler Veritabanı: https://portal.yek.gov.tr/works/search/full?&key=12804832&linked_field=barcode.