ABSTRACT
The Borderland. Around the frontiers of the better established part of psychology lies a ring of debatable matters; sometimes these are treated as though they must involve quite new hypotheses and principles of explanation; sometimes an attempt is made to extend the hypotheses already in use so as to include them. There are many who hold that these borderline phenomena— suggestion, hypnotism, telepathy, clairvoyance, and mediumistic happenings in general —will involve in the end a reconquest, as it were, of ordinary psychology by some form of Animism. The hypotheses needed to explain, for example, how a mind can act upon a distant mind (if it does) will, it is held, when they have been worked out, make ordinary orthodox psychology seem unduly timid.
