Stefan Ossowiecki’s Clairvoyance Experiments

Record summary

Polish engineer and psychical subject Stefan Ossowiecki was tested by researchers including Gustave Geley, Theodore Besterman, and Polish investigators in experiments involving sealed drawings, hidden objects, and psychokinetic claims. His case matters for cross-national comparison because it connected continental European psychical research with later parapsychological testing. Reports often emphasize impressive successes but vary in concealment, documentation, and experimenter access. Wartime disruption and the destruction or dispersal of records complicate verification, making archival reconstruction especially important.