Data Ghosts, 50 pages, black and white

"I have been thinking for some time of a machine or apparatus which could be operated by personalities which have passed on to another existence or sphere. (..) I do claim that it is possible to construct an apparatus which will be so delicate that if there are personalities in another existence or sphere who wish to get in touch with us in this existence or sphere, the apparatus will at least give them a better opportunity to express themselves than the tilting tables and raps and ouija boards and mediums and the other crude methods now purported to be the only means of communication?" - Thomas Edison, 1920