Liber de compositione alchimiae, translated in 1144, the first book in Europe on alchemy Liber algebrae et almucabola, Al-Khwārizmī's book about algebra, translated in 1145
In the 1140s Robert worked in Spain, where the division of the country
between Muslim and Christian rulers resulted in opportunities for
interchange between the different cultures. However, by the end of the
decade he had returned to England. Some sources identify him with
Robert of Ketton (Latin: Robertus Ketenensis) who was also active as
Lo Bello, Anthony. "Robert of Chester". The commentary of Al-Nayrizi on Book I of Euclid's Elements of geometry, with an introduction on the transmission of Euclid's Elements in the Middle Ages. Boston: Brill Academic. pp. 41–44. ISBN 0-391-04192-4. Charles Burnett, ‘Ketton, Robert of (fl. 1141–1157)’, Oxford Dictionary of National Biography, Oxford University Press, 2004. (This is, in effect, a double biography covering both Robert of Ketton and Robert of Chester.)
, complete text online. Translation of Robert of Chester, or Robert of Ketton.
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