The Inanimate Oracle
Place a bust on a pedestal in the corner of a room, and let there be
two tubes, as in the preceding article, one to go from the mouth, and
the other from the ear, through the pedestal and the floor to an under
apartment; there may be also wires, that go from the under jaw and the
eyes of the bust, by which they may be easily moved.
A person being placed in the room underneath, and applying his ear to
one of the tubes at a signal given, will hear any question asked, and
can immediately reply, by applying his mouth to the tube which
communicates below, at the same time moving the eyes by the wire, to
accompany his speech.