| 41. | Watts was member of the Society for Psychical Research.
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| 42. | In 1882 the Society for Psychical Research was founded.
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| 43. | He joined the Society for Psychical Research in 1914.
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| 44. | According to SPR critics William Barrett hoped to cling to something spiritual through psychical research.
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| 45. | The exposure was published in the Proceedings of the Society for Psychical Research in 1887.
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| 46. | The American Society for Psychical Research wanted further investigation.
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| 47. | James was a founding member and vice president of the American Society for Psychical Research.
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| 48. | The National Laboratory of Psychical Research was a rival to the Society for Psychical Research.
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| 49. | Murray held a deep interest in psychical research.
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| 50. | According to magician Boston Society for Psychical Research.
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