, such as a square, but in
order to do that the square must be within a reasonable distance from
our eyes; the mere additional dimension will avail a man in London
but little in his endeavour to examine a square in Calcutta.

Astral sight, when it is cramped by being directed along what is
practically a tube, is limited very much as physical sight would be
under similar circumstances; though if possessed in perfection it will
still continue to show, even at that distance, the auras, and
therefore all the emotions and most of the thoughts of the people
under observation.

There are many people for whom this type of clairvoyance is very much
facilitated if they have at hand some physical object which can be
used as a starting-point for their astral tube--a convenient focus for
their will-power. A ball of crystal is the commonest and most
effectual of such foci, since it has the additional advantage of
possessing within itself qualities which stimulate psychic faculty;
but other objects are also employed, to which we shall find it
necessary to refer more particularly when we come to consider
semi-intentional clairvoyance.

In connection with this astral-current form of clairvoyance, as with
others, we find that there are some psychics who are unable to use it
except when under the influence of mesmerism. The peculiarity in this
case is that among such psychics there are two varieties--one in which
by being thus set free the man is enabled to make a telescope for
himself, and another in which the magnetizer himself makes the
telescope and the subject is simply enabled to see through it. In this
latter case obviously the subject has not enough will to form a tube
for himself, and the operator, though possessed of the necessary
will-power, is not clairvoyant, or he could see through his own tube
without needing help.

Occasionally, though rarely, the tube which is formed possesses
another of the attributes of a telescope--that of magnifying the
objects at which it is directed until they seem of life-size. Of
course the objects must always be magnified to some extent, or they
would be absolutely invisible, but usually the extent is determined by
the size of the astral tube, and the whole thing is simply a tiny
moving picture. In the few cases where the figures are seen as of
life-size by this method, it is probable that an altogether new power
is beginning to dawn; but when this happens, careful observation is
needed in