  We consider the Dirac field in polar formulation, showing that when torsion
is taken in effective approximation the theory has the thermodynamic properties
of a van der Waals gas, that when the limit of zero chiral angle is taken the
theory reduces to that of a Weyssenhoff fluid, and that under the spinless
condition it gives the Newtonian particle. This nesting of approximations will
allow us to interpret the various objects pertaining to the spinor, with
torsion providing a form of negative pressure, and the chiral angle being
related to a type of temperature.
