Experimental investigation of the spirit manifestations : demonstrating the existence of spirits and their communion with mortals : doctrine of the spirit world respecting heaven, hell, morality, and God : also, the influence of Scripture on the morals of Christians
An 1855 New York book by chemist Robert Hare, from the Harry Houdini Collection at the Library of Congress, presenting an experimental account of spiritualist phenomena for a general reading public. Its plates show rotated, scientific-looking apparatus: a seated figure beside dials graduated in numbered rings, a suspended pendulum-like rig with cords and a spring scale, and a pair of pocket-watch style circular dials with a wooden frame and a hinged slotted tray below. The drawings are plain, precise line engravings with no ornament, so they suit designers wanting period instrument diagrams.
