Soo, Chung Ling, 1861-1918, Harry Houdini Collection (Library of Congress) DLC · New York City : Munn & Company · leaf 23
ca-tion with ink, which is made visible and brought outblack by means of heat. For the invisible ink youcan use sulphuric acid, very much diluted, so as notto destroy the paper. The necessary heat is obtainedin the following manner : The table (Fig. 4) on which lO SPIRIT SLATE WRITING. the slates… … Fig. 4.—False Table for Developing CommunicationsWritten with Sympathetic Ink. not catch fire. When the slates are placed on thetable they are laid over the little trap door, Avhich,in conjuring parlance, is known as a trap. This isnow opened, and the slates allowed to become wellheated and the…
Spiritualism · Magic tricks
Internet Archive · Library of Congress · Public Domain Mark 1.0. Free to use for anything.
