substance and becomes itself split up polarically.

Clearly, then, in the case of electrical polarity we encounter a
certain form of gravity-bound levity, and this in a twofold way. Owing
to the contrasting nature of the two bodies involved in the process,
the coupling of gravity and levity is a polar one on both sides. The
electrical polarity thus turns out to be itself of the nature of a
secondary polarity.

Two more recently discovered means of evoking the electric condition in
a piece of matter confirm this picture. They are the so-called
piezo-electricity and pyro-electricity. Both signify the occurrence of
the electrical polarity at the two ends of an asymmetrically built
(hemimorphous) crystal, as the result of changing the crystal's spatial
condition. In piezo-electricity the change consists in a diminution of
the crystal's volume through pressure; in pyro-electricity, in an
increase of the crystal volume by raising its temperature. The
asymmetry of the crystal, due to a one-sided working of the forces of
crystallization, plays the same role here as does the alchemic
opposition between the two bodies used for the production of frictional
electricity.

*

It is typical of the scientist of the past that he was dependent on
phenomena brought about by a highly developed experimental technique
for becoming aware of certain properties of the electrical force,
whereas for the realistic observer these properties are revealed at
once by the most primitive electric phenomena. We remember Eddington's
description of the positron as 'negative material', and his subsequent