The essays in this volume present a collective study of one of the major problems in the recent history of science: To what extent did the occult 'sciences' (alchemy, astrology, numerology, and natural magic) contribute to the scientific revolution of the late Renaissance? These studies of major scientists (Kepler, Bacon, Mersenne, and Newton) and of occultists (Dee, Fludd, and Cardano), complemented by analyses of contemporary official and unofficial...