In Synchrony with the Heavens (3 Vols.): Studies in Astronomical Timekeeping and Instrumentation in Medieval Islamic Civilization

This is the first investigation of timekeeping by the sun and stars and the regulation of the astronomically-defined times of Muslim prayer. The study is based on over 500 medieval astronomical manuscripts first identified by the author. A second volume and third volume, also published by Brill, deals with astronomical instruments for timekeeping and other computing devices. (Complete set: includes volume 1 and volume 2 in 2 parts)