W. J. Crawford

1880 – 1920

• Experiments in Psychical Science, Levitation, Contact, and the Direct Voice
• Calculations on the Entropy-temperature Chart
• Experiments in psychical science
• Hints and observations for those investigating the phenomena of spiritualism
• The psychic structures at the Goligher circle
• The Reality of Psychic Phenomena
• The reality of psychic phenomena
• Elementary graphic statics
• La mécanique psychique
• The psychic structures at the Goligher circle
• The reality of psychic phenomena
• The reality of psychic phenomena, raps, levitations, etc