reproduced in corresponding _form_ on reaching their destination. As
with the electro-magnetic waves, they may spread all round, just as
ripples do if we throw a stone into a pond; but they will only take form
where there is a correspondence able to receive them. This is what in
the language of electrical engineers is called "Syntony," which means
being tuned to the same rate of vibration, and no doubt it is from some
such cause, that we sometimes experience what seem inexplicable feelings
of attraction or repulsion towards different persons. This also appears
to furnish a key to thought-transference, hypnotism, and other allied
phenomena.

If the reader questions whether thought is capable of generating
impulses in the etheric medium I would refer him to the experiment
mentioned in Chapter XIV of my "Edinburgh Lectures on Mental Science,"
where I describe how, when operating with Dr. Baraduc's biometer, I
found that the needle revolved through a smaller or large arc of the
circle, in response to my mental intention of concentrating a smaller or
larger degree of force upon it. Perhaps you will say that the difference
in the movement of the needle depended on the quantity of magnetism that
was flowing from me, to say nothing of other known forces, such as heat,
light, electricity, etc. Well, that is precisely the proposition I am
putting forward. What caused the difference in the intensity of the
magnetic flow was my intention of varying it, so that we come back to
mental action as the centre of impulsion from which the etheric waves
were generated. If, then, such a demonstration can be obtained on the
plane of purely physical matter, why need we doubt that the same Law
will work in the same way, in respect of those finer modes of substance,
and wider ranges of etheric vibrations, which, starting from the basis
of recognized physical science, the Law of Continuity would lead to by
an orderly sequence, and which the occurrence of what, for want of a