Let us first be content to enumerate them. We shall find that we
have table-turning, with its raps; the movements and
transportations of inanimate objects without contact; luminous
phenomena; lucidite, or clairvoyance; veridical apparitions or
hallucinations; haunted houses; bilocations and so forth;
communications with the dead; the divining-rod; the miraculous
cures of Lourdes and elsewhere; fluidic asepsis; and lastly the
famous thinking animals of Elberfeld and Mannheim. These, if I be
not mistaken, after eliminating all that is in, sufficiently
attested, constitute the residue or caput mortuum of this
latter-day miracle.

Everybody has heard of table-turning, which may be called the A B
C of occult science. It is so common and so easily produced that
the Society for Psychical Research has not thought it necessary
to devote special attention to the subject. I need hardly add
that we must take count only of movements or "raps" obtained
without the hands touching the table, so as to remove every
possibility of fraud or unconscious complicity. To obtain these
movements it is enough, but it is also indispensable that those
who form the "chain" should include a person endowed with
mediumistic faculties. I repeat, the experiment is within the
reach of any one who cares to try it under the requisite
conditions; and it is as incontestable as the polarization of
light or as crystallization by means of electric currents.

In the same group may be placed the movement and transportation
of objects without contact, the touches of spirit hands, the
luminous phenomena and materialization. Like table-turning, they
demand the presence of a medium. I need not observe that we here