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"In the present book I go over the whole field of the supernormal, including such material as crystal gazing, coincidental dreams, clairvoyance, and premonitions. I have tried to give these subjects that unity of interest and meaning which are due to the supernormal having psychological and demanding more scientific investigation than has yet been done. This book should provide evidence of something which needs further investigation. Taken collectively the facts have an impressive character for some general conclusion, but those who understand psychology will want to reserve their judgment for something more than a probable supernormal. Speculations ignoring normal experience must still wait awhile, and perhaps ought always to be discouraged on the part of any but the most expert"--Preface. (PsycINFO Database Record (c) 2010 APA, all rights reserved).

Parapsychology --- Psychical research. --- Spiritualism. --- Research.