Researches in the phenomena of spiritualism (1874)
Crookes, William, 1832-1919 · London : J. Burns · leaf 42
itshall quickly follow the movements of the centre of thedisc, A. These movements are transmitted and recordedon the glass plate E F, by means of the lever and needle on Psychic Force. 39 point C. Holes are cut in the side of the hoop to allow afree passage of air to the under side of the membrane.… … on the smoked glass was perfectly straight in spite of allour attempts to influence the lever by shaking the stand orstamping on the floor. Experiment V.—Without having the object of the instru-ment explained to her, the lady was brought into the roomand asked to place her fingers on the wooden…
Spiritualism · Parapsychology
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