s of energy on the astral plane which carry to the astral senses
of the person the perception of the things, objects and scenes far removed
from him in space and time. How these things far removed in space and time
are perceived by the astral seer is explained in subsequent lessons of
this course. At this place we are concerned merely with the "channel"
through which the currents of energy flow, and which has been called the
astral tube.

As a writer well says: "Through the astral tube the astral senses actually
'sense' the sights, and often the sounds, being manifested at a distance,
just as one may see distant sights through a telescope, or hear distant
sounds through a telephone. The astral tube is used in a variety of forms
of psychic phenomena. It is often used unconsciously, and springs into
existence spontaneously, under the strong influence of a vivid emotion,
desire or will. It is used by the trained psychometrist, without the use
of any 'starting point,' or 'focal centre,' simply by the use of his
trained, developed and concentrated will. But its most familiar and common
use is in connection with some object serving as a starting point or focal
centre. The starting point or focal centre, above mentioned, is generally
either what is known as the 'associated object' in the class of phenomena
generally known as psychometry, or else a glass or crystal ball, or
similar polished surface, in what is known as crystal-gazing."

Another authority tells his readers that: "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 continue to show, even at that
distance, the auras, and therefore all the emotions and most of the
thoughts of the people under observation. * * * But, it may be said, the
mere fact that he is using astral sight ought to enable him to see things
from all sides at once. And so it would, if he were using that sight in a
normal way upon an object which was fairly near him--within his astral
reach, as it were; but at a distance of hundreds or thousands of miles the
case is very different. Astral sight gives us the advantage of an
additional dimension, but there is still such a thing as position in that
dimension, and it is naturally a potent factor in limiting the use of the
powers on that plane. * * * The limitations resemble those of a man using
a telesco