Ḥaṭṭ al-niqāb ʻan wujūh aʻmāl al-ḥisāb. [حط النقاب عن وجوه اعمال الحساب]

It includes technical diagrams, mathematical descriptions, and guidance for celestial calculations.

Reflecting the scholarly rigor of the Islamic Golden Age, the treatise was intended to educate students and astronomers in observational and theoretical methods.