Hours with the ghosts, or, Nineteenth century witchcraft : illustrated investigations into the phenomena of spiritualism and theosophy (1897)
Evans, Henry Ridgely, 1861-1949, Harry Houdini Collection (Library of Congress) DLC · Chicago : Laird & Lee · leaf 123
FIG. 9. CROOKES APPARATU9. register, D. The balance is suspended from a veryfirm tripod support, E. The following piece of apparatus is not shown inthe figures. To the moving index, O, of the springbalance, a fine steel point is soldered, projecting hori-zontally outwards. In front of the balance,… … FIG. 10. CROOKES APPARATUS. ing a flat box similar to the dark box of a photo-graphic camera. This box is made to travel byclock-work horizontally in front of the moving index,and it contains a sheet of plate-glass which has beensmoked over a flame. The projecting steel point im-presses a mark on…
Blavatsky, H. P. (Helena Petrovna), 1831-1891 · Spiritualism · Theosophy
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