The reality of psychic phenomena : raps, levitations, etc. . Fig. 34. seen the actual completion of the the occasions I have witnessed the pheno-menon the operators were unable to succeed withthe final necessary jerk. However, the sittersinform me that it has been completely successfulon one occasion. I take it that the psychic arm had hold of thetrumpet by adhesion at its thick end, and thatthe various motions given to it were more orless those I have dealt with already. This experiment of the movement of thetrumpet, the waving to and fro in the air keeping A CANTILEVER THEORY 1
The reality of psychic phenomena : raps, levitations, etc. . Fig. 34. seen the actual completion of the the occasions I have witnessed the pheno-menon the operators were unable to succeed withthe final necessary jerk. However, the sittersinform me that it has been completely successfulon one occasion. I take it that the psychic arm had hold of thetrumpet by adhesion at its thick end, and thatthe various motions given to it were more orless those I have dealt with already. This experiment of the movement of thetrumpet, the waving to and fro in the air keeping A CANTILEVER THEORY 177 time to a tune, and the motions described aboveabout the ledge of the table may be interestingto those who at dark seances have heard the voices through a trumpet which was presum-ably moving about the room. In Experiment 22 it was stated that when thetable stands on the floor within the circle it can. Fig. 35, be made on request almost as light as a featheror so heavy that it cannot be lifted. Now, it has been shown (Chapter VII, Ex-periments 45, 47, etc.) that when a compres-sion balance is on the floor below the table, if,say, 30 lb. is the normal vertical reaction forsteady levitation, this reaction is not applied sud-denly, but, in other words, grows steadily forabout five to six seconds, and that the tableseems to spring into the air when the growth 1% 178 REAJLITY OF PSYCHIC PHENOMENA of psychic force is complete. According to thecantilever theory this growth of the reaction issynonymous with the making of the cantileverrigid enough to withstand the weight of the levi-tated table. Suppose, now, that the growth ofthis psychic force is stopped at a value whichdoes not make the cantilever sufficiently rigid tolift the table, but which nevertheless makes itsufficiently strong to exert a considerable up-ward force on the table—but less than its weight,—then we have the apparen
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