The reality of psychic phenomena : raps, levitations, etc. . ) There is a critical distance of the mediumfrom table required for levitation (Experiment10, and p. 56). This may have to do with thestructure of the cantilever. It is possibly nota simple rod as shown in fig. 24, but may becompounded of several arms, and the coalescingof these arms may require that the medium benot too far from nor too near the table. (8) 1 will now go into the puzzling results de-scribed in Chapter VII. (Experiments 50 and53); they are as follows :— (a) While the seance-table, weight lOf lb., wassteadily levitated
The reality of psychic phenomena : raps, levitations, etc. . ) There is a critical distance of the mediumfrom table required for levitation (Experiment10, and p. 56). This may have to do with thestructure of the cantilever. It is possibly nota simple rod as shown in fig. 24, but may becompounded of several arms, and the coalescingof these arms may require that the medium benot too far from nor too near the table. (8) 1 will now go into the puzzling results de-scribed in Chapter VII. (Experiments 50 and53); they are as follows :— (a) While the seance-table, weight lOf lb., wassteadily levitated, there was, upon a compres-sion balance placed centrally on the floor beneath 156 REALITY OF PSYCHIC PHENOMENA it, a vertical downward force of 30 lb., or2*89 times the weight of the table; there wasalso a horizontal pushing force of 5^ lb. fromthe medium; and the vertical and horizontalforces were not separate and distinct, but werecomponents of a single force. {b) While a stool, of weight 2 lb. 12 oz., wassteadily levitated over a drawing-board placed. Fig. 25. on top of a compression balance, there was avertical downward force upon the balance of18f lb., or 6*8 times the weight of the stool. How are these experimental values, of whosepractical correctness there can be no doubt, tobe explained on the cantilever theory? Fig. 25 indicates the cantilever A projectingfrom the medium M. It is shown in itsunstrained normal position. The free end Bis probably, on its under side, within 6 in. ofthe floor. Fig. 26 shows the cantilever when in a A CANTILEVER THEORY 157 strained unnatural position owing to the endB ha^dng to be raised to the level of the panof the compression balance. As the beam iselastic, it will in this latter position pressdownwards and outwards on the top of thebalance, as indicated by the direction line ofthe force P. It is obvious that the force Pcan be resolved into vertical and horizontal
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