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Mathematical Treasure: Quadrant Signed by Aḥmad ibn Ibrāhīm al-Sharbatlī
This astrolabe quadrant is made of lacquered wood and was signed by its presumed maker, Aḥmad ibn Ibrāhīm al-Sharbatlī, in 1840–1841 (1256 AH).
This object is owned by the British Library (Or 2411/2) and was digitized in the Library’s partnership with the Qatar Foundation. See additional images in the Qatar Digital Library.
Frank J. Swetz (The Pennsylvania State University), "Mathematical Treasure: Quadrant Signed by Aḥmad ibn Ibrāhīm al-Sharbatlī," Convergence (September 2023)
