Researches in the phenomena of spiritualism (1874)
Crookes, William, 1832-1919 · London : J. Burns · leaf 41
not mention her name. She has, however, consented tomeet any scientific men whom I may introduce for purposesof investigation. A piece of thin parchment, A, Figs. 9 and 10, is stretchedtightly across a circular hoop of wood. B C is a light leverturning on D. At the end B is a vertical needle point… … horizontally and touching a smoked glass plate, E F. Thisglass plate is drawn along in the direction H G by clock-work, K. The end B of the lever is weighted so that itshall quickly follow the movements of the centre of thedisc, A. These movements are transmitted and recordedon the glass plate E F,…
Spiritualism · Parapsychology
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