BOSTON AND NEW YORK HOUGHTON, MIFFLIN AND COMPANY The Riverside Press, Cambridge A group of problems that appears conspicuously in the present volume, and in so far contributes to the fitness of its title, has obtained a considerable interest on the part of the public at large. Such interest seems prone to take its clue from the activity of those who herald startling revelations on the basis of unusual psychic experiences, and who give promise of disclosing other worlds than the one with which common sense and common sensation acquaint us, rather than from the cautious and consistent results of serious and professional students in study or in laboratory. The fascinat…
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