Note 7 — Chapter III

There is a great deal of literature on this subject, very unequal in value, in France, Germany and England. I will here mention two books in which the subject is treated scientifically by men of real worth.

(1) Letters on Animal Magnetism, by William Gregory, London, 1850. Gregory was a professor of chemistry at the University of Edinburgh. His book is a profound study of the phenomena of animal magnetism, from suggestion to vision at a distance and lucid clairvoyance, on subjects observed by himself, in accordance with scientific method, and with minute exactness.

(2) Die mystischen Erscheinungen der menschlichen Natur, von Maximilian Perty, Leipzig, 1872. Perty is a professor of philosophy and medicine at the University of Berne. His book presents an immense repertory of all such occult phenomena as have historical value. The extremely remarkable chapter on clairvoyance (Schlafwachen), Volume I., contains twenty accounts of female and five of male clairvoyants, related by the doctors who treated the cases. That of Weiner, treated by the author, is most curious. See also the treatises on magnetism by Dupotet and Deleuze, and the very strange book, Die Seherin von Prévorst, by Justinus Kerner.