darting forms. Fig. 7 is added as an illustration of the complexity
attainable. It seems to us a most marvellous thing that some of the
drawings, made apparently at random by the use of this machine, should
exactly correspond to higher types of thought-forms created in
meditation. We are sure that a wealth of significance lies behind this
fact, though it will need much further investigation before we can say
certainly all that it means. But it must surely imply this much--that,
if two forces on the physical plane bearing a certain ratio one to the
other can draw a form which exactly corresponds to that produced on the
mental plane by a complex thought, we may infer that that thought sets
in motion on its own plane two forces which are in the same ratio one to
the other. What these forces are and how they work remains to be seen;
but if we are ever able to solve this problem, it is likely that it
will open to us a new and exceedingly valuable field of knowledge.

[Illustration: FIGS. 4-7. FORMS PRODUCED BY PENDULUMS]


GENERAL PRINCIPLES.

Three general principles underlie the production of all thought-forms:--

1. Quality of thought determines colour.

2. Nature of thought determines form.

3. Definiteness of thought determines clearness of outline.