Project icon: lavishly furnished initial letter with a painting of Ptolemy using an astrolab.


Arabus et Latinus

Α Β Γ Δ Ε Ζ Η Θ Ι Κ Λ Μ Ν Ξ Ο Π Ρ Σ Τ Υ Φ Χ Ψ Ω α β γ δ ε ζ η θ ι κ λ μ ν ξ ο π ρ σ ς τ υ φ χ ψ ω
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Work C.1.1301

Quṭb al-Dīn al-Shīrāzī
Faṣl fī l-Ṭarīq alladhī bi-hi ʿalima Baṭlamiyūs anna markaz al-ḥāmil fī kulli wāḥid min al-kawākib al-ʿulwiya ʿalā muntaṣaf mā bayna markazay l-burūj wa-muʿaddil al-masīr


An untitled section from Quṭb al-Dīn al-Shīrāzī’s Nihāyat al-idrāk fī dirāyat al-aflāk II.8 on the possible empirical origin of Ptolemy’s equant. This section can also be found as an untitled independent work appended to Naṣīr al-Dīn al-Ṭūsī’s Taḥrīr al-Majisṭī.