soning with regard to certain psychic phenomena is somewhat along
the following lines.

APPARITIONS

_The intrusion (as an apparition) of a person or thing into a
completely enclosed portion of three-space; or contrariwise, the
exit (as an evanishment) out of such a space_.

Because we lack the sense of four-dimensional space, we must here
have recourse to analogy, and assume three-dimensional space to be
the unsensed higher region encompassing a world of two dimensions,
To a hypothetical flat-man of a two-space, any portion of his plane
surrounded by an unbroken line would constitute an enclosure. Were
he confined within it, escape would be impossible by any means known
to him. Had he the ability to move in the third dimension, however,
he could rise, pass over the enclosing line without disturbing it,
and descend on the other side. The moment he forsook the plane he
would disappear from two-dimensional space. Such a disappearance
would constitute an occult phenomenon in a world of two dimensions.

Correspondingly, an evanishment from any three-dimensional
enclosure--such as a room with locked doors and windows--might be
effected by means of a movement in the fourth dimension. Because a
body would disappear from our perception the moment it forsook our
space, such a disappearance would be a mystery; it would constitute
an occult phenomenon. The thing would be no more mysterious, however,
to a consciousness embracing four dimensions within its ken, than
the transfer of an object from the inside to the outside of a plane
figure without crossing its linear boundary is mysterious to us.

POSSESSION

_The temporary possession of a person's body, or some member of
that body, by an alien will, as exemplified in automatic writing and
obsession_.

It would doubtless amaze the scientifically orthodox to know how
many people habitually and successfully practice the dubious art of
automatic writing--not mediums, so-called, but people of refinement
and intelligence. Although the messages received in this way may
emanate from the subconscious mind of the performer, there is
evidence to indicate that they come sometimes from an intelligence
discarnate, or from a person remote from the recipient in space.

If such is indeed the case, if the will is extraneous, how does it
possess itself of the nerves and muscles of the hand of the writer?
The Higher Space Hypothesis is of assistance here. It is only
necessary to remembe