Marc Jones looked at the Dial and decided against it, preferring to use the semi-sextile, sesquiquadrate and semi-square.  Indeed now with modern software one can divvy up the whole chart into 22.5 – 45 or 135 degree angles very easily and ignore the dial, so it is a preference.   Others go with John Addey and use Harmonics i.e.:  the 90 degree dial is equal to the Fourth Harmonic because 360/4= 90 degrees but right now we are using the 90°  Dial.                                      Back…