Harmonic horoscopes are based on principles of resonance, like
overtones, which are present in every horoscope. The whole
zodiac (360°) is taken as the basic tone, representing the
number one (1). By using a higher vibration, we can 'cause' the
circle to oscillate more quickly, so to speak, and investigate
which planets work together in this particular pattern. For
example, the fourth harmonic would involve all those planets
which share square aspects (90° - division of the circle by
four). In the harmonic chart, these planets form conjunctions.
The number corresponding to each 'vibration' influences the
interpretation.   At the risk over oversimplifying, one can say
that the study of harmonics greatly extends and differentiates
the theory of aspects.   Numerical Symbolism and Aspects   The
aspects imply favorable, unfavorable or ambivalent relationships
between the planets. Although the interpretation depends greatly
on the nature of the planets involved, this view largely derives
from the traditional symbol