Galen, De diebus decretoriis, from Greek into Arabic. A critical edition, with translation and commentary of Hunayn ibn Ishāq, Kitāb ayyām al-buhrān, by Glen M. Cooper.

First printed edition of Hunayn ibn Ishaq's Arabic translation of Galen's Critical Days (De diebus decretoriis), a founding text of astrological medicine, together with the first translation of the text into a modern language.