The reality of psychic phenomena : raps, levitations, etc. (1916)
Crawford, W. J. (William Jackson), 1880-1920, Harry Houdini Collection (Library of Congress) DLC · London : John M. Watkins · leaf 181
to prevent motion.What do we find ? Turn to Experiment 26. The diagram in that experiment is reproducedin fig. 28. We find that the operators undersuch conditions, when delicate balancing workis not required, but when magnitude of psychicforce is the all-important thing, tilt the edge ofthe table… … grip with the canti-lever arm. No pre-Hminary operationsare needed; thetable simply tilts,and a short, almoststraight arm pro-jects from mediumon to the under sur-face of table. Many other ex-periments and ob-servations also sug-gest that the shapeof the cantileverarm required forlevitation is only…
Parapsychology · Spiritualism
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