The `Science of properties' represents a large and fascinating part of Arabic technical literature. The book of 'Isa ibn 'Ali (9th cent.) `On the useful properties of animal parts' was the first of such compositions in Arabic. His author was a Syriac physician, disciple of Hunayn ibn Ishaq, who worked at the Abbasid court during the floruit of the translation movement. For the composition of his book, as a multilingual scholar, he collected many different antique and late antique sources. The structure of the text itself-a collection of recipes that favoured a fluid transmission-becomes here...