Origin of psychic research.--General problems and results.--The problem of a future life.--History of the Piper case.--Incidents from the English report.--Dr. Hodgson's first report.--Dr. Hodgson's second report.--Personal experiments and results.--The telepathic hypothesis.--The spiritistic hypothesis.--Difficulties and objections.--Conditions affecting the "communications."--Ethical meaning and results
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