Hints and observations for those investigating the phenomena of spiritualism
This is a 1918 New York guide by the Belfast lecturer W. J. Crawford, drawn from the Harry Houdini collection at the Library of Congress, written for investigators testing claims of spiritualism. The photographs show a small table set up as a test apparatus, with a view beneath its top, a suspended scale and a seated sitter with hands held by observers, a plain documentary record a designer could use for sepia, halftone-era photographic styling of experimental settings and staged observation.
