Spirit intercourse, its theory and practice
Spirit intercourse, its theory and practice is a 1917 spiritualism treatise by James Hewat McKenzie, published in New York by M. Kennerley for a general readership interested in psychical investigation. Its pictures are grainy photographs of a draped, ghostly figure beside a seated woman, a dim night scene of a white figure bending over a reclining body under stars, and a schematic diagram of concentric dashed rings around a small globe, with planets Mercury and Venus marked above; a designer might take the eerie halftone atmosphere and the diagram's radiating ring structure.
