David Abbott

David Phelps Abbott (September 22, 1863 – June 12, 1934) was a magician, author and inventor who created such effects as the floating ball, later made famous by Okito. The best known of his books is Behind the Scenes with the Mediums (1907) considered to be one of the best exposures of the tricks used by mediums. One exposure being the "spirit portrait paintings" by the Bangs Sisters.