Experiments in psychical science, levitation, contact, and the direct voice (1919)
Crawford, William Jackson, 1880-1920 · New York, E.P. Dutton · leaf 60
W … Fig. 11. and the other to the centre of the pointer). Theclip was insulated from the dial by pieces ofbrown paper. The idea was that when thepointer moved round sufficiently to touch theclip, an electric bell in the circuit would ring.Full details of a similar arrangement are givenin R.P.P., ch.…
Spiritualism and psychical research
Internet Archive · University of Toronto, Robarts Library · Public Domain Mark 1.0. Free to use for anything.
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