New York: Experimenter Publishing Company, Inc., 1928. Large octavo, single issue, pictorial wrappers. Large magazine format. First and only issue. 112 page magazine consisting of Part 1, (pp. 12-59) "Houdini's Spirit Exposés: Culled from his own manuscripts. Describing his investigations in a tireless search for genuine spirit manifestations and detailing his experiences in unearthing frauds." And Part 2, (pp. 60-107) "Dunninger's Psychical Investigations: The experiences of the author while investigating mediums in his official capacity as Chairman of the Science and Invention Magazine Committee for Psychical Research." Dunninger was a famous magician and mentalist, whose contemporaries included Harry Houdini and Blackstone. Dunninger also wrote a column for Gernsback's Science and Invention magazine. A strong debunker of spiritulalists and mediums he and the publisher's had a standing offer of $10,000.00 ($170,000 in money today) for any medium/psychic to prove they could contact the dead. It was never collected any many phonies were exposed. From the preface, "We do not wish to question anyone's religious beliefs, but we DO wish to take an emphatic stand against all unscientific demonstrations and all spiritistic "hocus pocus" which, as a rule, is designed only to prey upon trusting and believing people, either to extract money from them directly or idirectly..." (p. 8). Dunninger (18982-1975) published many articles and books, some ghost written by his close friend Walter B. Gibson, he also appeared on radio and television.