Preliminary report of the Commission appointed by the University of Pennsylvania to investigate modern spiritualism : in accordance with the request of the late Henry Seybert.
A Philadelphia report of 1887 by the Seybert Commission, appointed by the University of Pennsylvania to investigate modern spiritualism at the request of Henry Seybert. Its pictures are plain line diagrams of seance room layouts, with cross marks for sitters or objects, numbered positions, and labelled tables and doors, offering a designer clean schematic plans with a lettered key.
