The reality of psychic phenomena : raps, levitations, etc. . elucidation of the mystery of psychicforce. It is this : At the greater heights—thosein which the reactions are heavy—the downwardvertical force on the platform did not becomesteady (as might have been expected) as soon aslevitation was effected. On the contrary, theforce in all cases continued to increase for acouple of seconds or so after levitation. From5 lb. to 8 lb. is my estimate of the amount ofdownward force added after levitation was com-plete, and before the pointer on the balanceceased moving, which it, however, eventually
The reality of psychic phenomena : raps, levitations, etc. . elucidation of the mystery of psychicforce. It is this : At the greater heights—thosein which the reactions are heavy—the downwardvertical force on the platform did not becomesteady (as might have been expected) as soon aslevitation was effected. On the contrary, theforce in all cases continued to increase for acouple of seconds or so after levitation. From5 lb. to 8 lb. is my estimate of the amount ofdownward force added after levitation was com-plete, and before the pointer on the balanceceased moving, which it, however, eventuallydid in all cases. The readings given aboverepresent the final steady values. And now a word or two on the interpretationof the results of Experiments 51 and 52. Thethree tests, although they do not give identical COMPRESSION SPRING BALANCE 129 results for the different heights, are, however,fairly consistent. They all show— (1) That on the floor, and for two or threeinches above it, there is no reaction (thus verify-ing the results of Experiment 38).. O Height of platform from floor. Fig. 18. (2) A very slight reaction is just noticeable ata height of three inches from the floor. (3) The reaction in all three cases suddenlyincreases. For instance, in Experiment 51, frominch 5^ to inch 7^> it changes from 3 lb. to 23^lb.; in Experiment 52, test A, from inch 3 toinch 5, it changes from f lb. to 22 lb.; in test B,from inch 3 to inch 5, from f lb. to 26 lb. 130 REALITY OF PSYCHIC PHENOMENA (4) After the sudden increase of reactionpressure referred to in (3), the rate of increaseof pressure with height greatly diminishes. The graph, fig. 18, shows roughly how thereaction varies. There seems first to be agradual rise of pressure (A), then a sudden rise(B), and then a slower and fairly uniform in-crease (C). Experiment 53: To find the vertical componentof the reaction when a small stool islevitated immediately above a compres-sion balance. I placed the drawing-board (covered
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