also psycho-graphic, "of or pertaining to psychography," 1856, from psychograph "supernatural photographic image or device" (1854) from psycho- + -graph. Also see psychography. Related: Psychographics.
—What next? Among the new patents announced is one to Adolphus Theodore Wagner, of Berlin, in the kingdom of Prussia, professor of music, for the invention of a "psychograph, or apparatus for indicating a person's thoughts by the agency of nervous electricity." [Arthur's Home Magazine, May 1854]