80. Let us return to the theory of the movement of a table. If a spirit can raise a
table by the means indicated, he can raise anything else: an arm-chair, for example. If
he can raise an arm-chair, he can also, sufficient force being granted, raise it with some
one sitting in it. We have thus the explanation of a phenomenon which has taken place
hundreds of times, through Mr Home and through other persons; and, in order to prove
that the spectators of these levitations were not the victims of an optical illusion, they
have often made a mark on the ceiling with a pencil, and people have passed under
them, while they were thus held up in the air.