Animal magnetism, as understood at the beginning of the nineteenth century, covered a vaguely defined area of physiological and psychological phenomena which, it was thought, could all be explained as 'magnetic.'
Jung provides the canonical depth-psychological genealogy of magnetism, showing how Mesmer's concept of animal magnetism — encompassing somnambulism, clairvoyance, and waking sleep — served as the direct precursor to the modern theory and practice of hypnosis.
, Collected Works Volume 18: The Symbolic Life, 1976thesis