Ali ibn Khalaf

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Alī ibn Khalaf (

Ṣāʿid al- Andalusī.[2]

He devised, with help from al-Zarqali, the universal astrolabe.[3] Both Khalaf and al-Zarqali's design were included in the Libros del Saber (1227) of Alfonso X of Castile.[4]

References

  1. ISBN 978-0-387-31022-0
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  2. doi:10.1163/15700674-12342244
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  3. ^ David A. King, World-maps for finding the direction and distance to Mecca, (Brill, 1999), 330.
  4. ^ 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.
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