Mental Radio: Does it work, and how? (1930) was written by the American author Upton Sinclair. This book documents Sinclair's test of psychic abilities of Mary Craig Kimbrough, his second wife, while she was in a state of profound depression with a heightened interest in the occult. She attempted to duplicate 290 pictures which were drawn by her husband. Sinclair estimated Mary successfully duplicated 65 of them, with 155 "partial successes" and 70 failures. These experiments were not done in a controlled scientific environment.
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