Sketches of the philosophy of apparitions, or, an attempt to trace such illusions to their physical causes / by Samuel Hibbert.

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Sketches of the philosophy of apparitions, or, an attempt to trace such illusions to their physical causes / by Samuel Hibbert. Public Domain Mark. Source: Wellcome Collection.

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This material has been provided by Royal College of Physicians, London. The original may be consulted at Royal College of Physicians, London.