Gabriele Ferrario, <i>The Book on Alums and Salts of Pseudo-Rāzī: The Arabic and Hebrew Traditions</i> New York: Routledge, 2024. Pp. 220. ISBN 978-1-032-86940-7. £32.00 (paperback).

s edition and translation of the Arabic and Hebrew versions of the chemical treatise On Alums and Salts is a praiseworthy contribution to history of medieval and early modern science.Composed in Arabic in eleventh-century Iberia, according to Julius Ruska (p.9), the treatise was attributed to the famous Arabophone medical and chemical author Ab Bakr Muammad ibn Zakariyy al-Rz (d.925 or 935), apparently by its twelfth-century Latin translator Gerard of Cremona (p. 6).The treatise's recipes and characterizations of chemical materials and operations circulated widely in Western Europe in Latin and Hebrew.Ferrario presents the editio princeps of the unique Hebrew manuscript, alongside a re-edition of the unique Arabic manuscript, previously edited by Ruska, with