View source for Biography:Al-Muradi

:''See Abu Jafar al-Muradi for the Egyptian grammarian.''

[[File:Ibn Jalaf al-Muradí (MUNCYT, Eulogia Merle).jpg|thumb|upright|Al-Muradí portrait.]]
[[File:Fragment of The Book of Secrets in the Results of Thoughts. 11th century.jpg|thumb|upright|Fragment of The Book of Secrets in the Results of Thoughts. 11th century]]
'''Alī Ibn Khalaf al-Murādī''', ({{lang|ar| أبو جعفر علي ابن خلف المرادي}}; 11th century) was an Andalusian mathematician and astronomer who belonged to the scientific circle of Ṣāʿid al- Andalusī.<ref>{{cite journal|last1=Calvo|first1=Emilia|title=Some Features of the Old Castilian Alfonsine Translation of ʿAlī Ibn Khalaf’s Treatise on the Lámina Universal|journal=Medieval Encounters|date=22 September 2017|volume=23|issue=1-5|pages=106–123|doi=10.1163/15700674-12342244}}</ref>

He was the author of the technological manuscript entitled ''Kitāb al-asrār fī natā'ij al-afkār'' ({{Lang-ar|كتاب الأسرار في نتائج الأفكار}}'', The Book of Secrets in the Results of Thoughts'' or ''The Book of Secrets in the Results of Ideas'').<ref>Ahmed Djebbar, "Technology in the service of progress: The examples of hydraulic technologies," in ''[http://unesdoc.unesco.org/images/0019/001917/191745e.pdfArab-Muslim Civilization in the Mirror of Universal]{{Dead link|date=October 2018 |bot=InternetArchiveBot |fix-attempted=yes }}'', UNESCO, 2010, p. 292-304.</ref> It was copied and used at the court of Alfonso VI of León and Castile in Christian Spain in the 11th century. {{citation needed|date=October 2011}}

The manuscript provides information about a "Castle and Gazelle Clock" and many other forms of complicated clocks and ingenious devices. Al-Muradi was a contemporary of [[Biography:Abū Ishāq Ibrāhīm al-Zarqālī|Abū Ishāq Ibrāhīm al-Zarqālī]].{{citation needed|date=October 2011}}

In 2008, the Book of Secrets of al-Muradi has been published in facsimile, translated in English/Italian/French/Arabic and in an electronic edition with all machines interpreted in 3D, by the Italian study center Leonardo3.

He also devised, with help from al-Zarqali, the universal [[Astronomy:Astrolabe|astrolabe]].<ref>David A. King, ''World-maps for finding the direction and distance to Mecca'', (Brill, 1999), 330.</ref> Both al-Muradi and al-Zarqali's design were included in the ''Libros del Saber'' (1227) of Alfonso X of Castile.<ref>Koenraad Van Cleempoel. "The Migration of Instrumental Knowledge from Flanders to Spain," in: ''Silent Messengers: The Circulation of Material Objects of Knowledge in the Early Modern Low Countries,'' Sven Dupré and Christoph Herbert Lüthy (eds.), (Transaction Publishers, 2011), p. 76.</ref>

==References==
{{reflist}}

{{Islamic astronomy}}
{{Islamic mathematics}}


[[Category:Scientific instrument makers]]
[[Category:11th-century mathematicians]]

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