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Edme-Gilles Guyot

Edmé-Gilles Guyot (1706–1786) was a French physician, postmaster, cartographer, inventor and author on the subject of mathematics, physics and magic. He experimented with optical illusions and with the theory behind performance magic. His developments into the apparent appearance of ghosts, using the projection of a figure into smoke, helped to create the technology and techniques used in phantasmagoria. --from Wikipedia

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