The reality of psychic phenomena : raps, levitations, etc. . off that shown inthe accompanying fig. 27, which indicates thecantilever diagrammatically. It consists of twomain portions, A and B. A is a slightly curvedarm springing from and firmly fixed to themedium M, while B is a vertical column risingfrom and continuous with its extremity C. Thelevitated table is supported at the summit Tof the column. The reason for the slightlyarched shape of the arm is to give additionalrigidity to the structure. When the pan ofa compression balance is under the table at aheight greater than three inches f
The reality of psychic phenomena : raps, levitations, etc. . off that shown inthe accompanying fig. 27, which indicates thecantilever diagrammatically. It consists of twomain portions, A and B. A is a slightly curvedarm springing from and firmly fixed to themedium M, while B is a vertical column risingfrom and continuous with its extremity C. Thelevitated table is supported at the summit Tof the column. The reason for the slightlyarched shape of the arm is to give additionalrigidity to the structure. When the pan ofa compression balance is under the table at aheight greater than three inches from the floor,the end C presses downwards on it and causesforces to be registered such as those given in 11 162 REALITY OF PSYCHIC PHENOMENA the tabulation to Experiments 51 and 52. InExperiments 59 and 60 the electric contact-maker when the bell rang was cutting acrossthe arm A. I say nothing here as to how a structurepossessing the characteristics of a cantileversuch as that sketched, and which can supportat its extremity for five minutes or more a body. Fig. 27. weighing 10 lb., can be produced from apparentlynothing. I will have something to say aboutthat later on. The cantilever above sketched is in myopinion only a particular case of the methodby which the operators produce nearly all theirphenomena. Levitation of the table is adelicate piece of work, inasmuch as a very nicebalance has to be obtained; it is not simplya question of shoving the table here and there A CANTILEVER THEORY 163 without consideration of such things as equi-Ubrium and balance. Accordingly we find, as might have beenexpected, that the preliminary operations beforelevitation occurs at all occupy some little line or physical means of communicationseems to be put down from medium to table(see Experiment 64); and when this is welland truly laid, psychic force is exerted alongit { it is stiffened into a rigid cantilever). The whole arm A C T in fig. 27 takes theshape shown in order that the pa
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