inevitably bring down
upon his head, sooner or later, certain occult astral forces which will
prove disastrous to him. He will become involved in the web of his own
making, and will suffer greatly. Never by any means allow yourself to be
tempted into indulging in any of the practices of Black Magic, under any
form of disguise. You will live to regret it if you do. Employ your
powers, when you develop them, for the good of others; or at least, for
purely scientific investigation and knowledge.

The scientific investigator of this phase of psychic influence, will wish
to become acquainted with what the occultists call "the astral tube." In
this phase of the phenomena, you manifest upon the astral plane, rather
than upon the physical. The astral form of telepathy is manifested, rather
than the ordinary form. While there are a number of technical points
involved in the production of the astral tube, I shall endeavor to
instruct you regarding its creation and use in as plain words as possible,
omitting all reference to technical occult details which would only serve
to distract your attention and confuse your mind. The advanced occult
student will understand these omitted technicalities without being told of
them; the others would not know what was meant by them, if mentioned, in
the absence of a long stage of preparatory teaching. After all, the theory
is not of so much importance to most of you as are the practical working
principles. I ask your careful attention to what I have to say in this
subject of the astral tube.

The Astral Tube is formed by the person forming in his imagination (i.e.,
on the astral plane by means of his imagination or visualizing powers), a
tube or small tunnel between himself and the person whom he wishes to
influence. He starts by picturing it in his mind a whirling vortex,
similar to the whirling ring of smoke emitted from a "coughing" engine,
and sometimes by a man smoking a cigar, about six inches to one foot in
diameter. He must will the imagined vortex-ring to move forward as if it
were actually boring a tunnel through the atmosphere. When the knack of
producing this astral tube is acquired, it will be found that the
visualized tunnel seems to vibrate with a peculiar intensity, and will
seem to be composed of a substance far more subtle than air. Then, at the
other end of this astral tube you must picture the other person, the one
whom you wish to influence. The person will seem as if view