but that of the
respective planes. It must be remembered that the astral and mental
planes of our earth are as definitely its own as its atmosphere,
though they extend considerably further from it even in our
three-dimensional space than does the physical air. Consequently the
passage to, or the detailed sight of, other planets would not be
possible for any system of clairvoyance connected with these planes.
It _is_ quite possible and easy for the man who can raise his
consciousness to the buddhic plane to pass to any other globe
belonging to our chain of worlds, but that is outside our present
subject.

Still a good deal of additional information about other planets can be
obtained by the use of such clairvoyant faculties as we have been
describing. It is possible to make sight enormously clearer by passing
outside of the constant disturbances of the earth's atmosphere, and it
is also not difficult to learn how to put on an exceedingly high
magnifying power, so that even by ordinary clairvoyance a good deal of
very interesting astronomical knowledge may be gained. But as far as
this earth and its immediate surroundings are concerned, there is
practically no limitation.

CHAPTER V.

CLAIRVOYANCE IN SPACE: SEMI-INTENTIONAL.

Under this rather curious title I am grouping together the cases of
all those people who definitely set themselves to see something, but
have no idea what the something will be, and no control over the sight
after the visions have begun--psychic Micawbers, who put themselves
into a receptive condition, and then simply wait for something to turn
up. Many trance-mediums would come under this heading; they either in
some way hypnotize themselves or are hypnotized by some
"spirit-guide," and then they describe the scenes or persons that
happen to float before their vision. Sometimes, however, when in this
condition they see what is taking place at a distance, and so they
come to have a place among our "clairvoyants in space."

But the largest and most widely-spread band of these semi-intentional
clairvoyants are the various kinds of crystal-gazers--those who, as
Mr. Andrew Lang puts it, "stare into a crystal ball, a cup, a mirror,
a blob of ink (Egypt and India), a drop of blood (among the Maories of
New Zealand), a bowl of water (Red Indian), a pond (Roman and
African), water in a glass bowl (in Fez), or almost any polished
surface" (_Dreams and Ghosts_, p. 57).

Two pages later Mr. Lan