Early in his career, the German doctor Franz Mesmer (1734 1815) became fascinated by the concept that the invisible natural forces or 'magnetism' exerted by planets, minerals and animals (or humans) could produce physical effects including healing. His influential 'discoveries' were highly controversial, and Mesmer tried persistently but unsuccessfully to obtain scientific recognition for his theory of 'animal magnetism'. This book, published in 1814, was edited by Mesmer's friend J. C. Wolfart, also a medical doctor and a former sceptic. Its scope goes far beyond the mere question of healing...