The reality of psychic phenomena : raps, levitations, etc. . n top of the board, and askedfor levitation. Fig. 19 indicates the arrangement. Thislevitation was evidently a most difficult one forthe operators; in fact, I think it was the mostdifficult one I have come across, not even ex-cepting that of the seance table over the platformof the weighing-machine (see Experiment 41).It was attempted at least a dozen times beforebeing finally successful. What usually happenedwas that the pointer on the balance would moveround to 20 lb. or so, and then, just when levita-tion was evidently about to oc
The reality of psychic phenomena : raps, levitations, etc. . n top of the board, and askedfor levitation. Fig. 19 indicates the arrangement. Thislevitation was evidently a most difficult one forthe operators; in fact, I think it was the mostdifficult one I have come across, not even ex-cepting that of the seance table over the platformof the weighing-machine (see Experiment 41).It was attempted at least a dozen times beforebeing finally successful. What usually happenedwas that the pointer on the balance would moveround to 20 lb. or so, and then, just when levita-tion was evidently about to occur, the little stoolwould topple over, when I would have to placeit upright again. It seemed to me that some-thing was trying to get under the stool, but. COMPRESSION SPRING BALANCE 131 owing to the small amount of space available,and to the height of the platform, was unsuc-cessful. At length, however, just when I wasabout to give up the experiment, even in spiteof the desire of the operators, who told me by ->- Levitated , 21b. 12o2. 13 i. -^ DrawingBoard,weight, 5*2 lb. -> Pointer reading 24i4lb. Fig. 19. raps to hold on, the stool went up about 8 the air and remained there quite steady forfrom 8 to 10 seconds. Two such levitationsgave for the vertical downward force on thebalance 24 lb., and two others gave 24^ lb. Theweight of the board (with carpet) was 5^ lb., sothat the vertical downward force on the balancewhile the stool was steadily levitated was 24^ 132 REALITY OF PSYCHIC PHENOMENA (the average) — 5^-= 18f lb., or 6-8 times theweight of the stool. In order to make sure that this value of ISflb. was not fictitious, during several of theunsuccessful attempts at levitation referred toabove I grasped the edge of the drawing-boardand lifted it a little. I found, as I anticipated,that my estimate of the downward force on theboard agreed roughly with the reading on thebalance. Eocperiment 54 : The work done in the previoustests gave me a fairly
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