  The Jeans criterion for the minimum self-gravitational condensation scale is
extended to include the possibility of condensation on non-acoustic density
nuclei at Schwarz scales, where structure formation begins in the plasma epoch
at proto-supercluster masses about 10,000 years after the Big Bang, decreasing
to galaxy masses at 300,000 years. Then the plasma universe became relatively
inviscid gas and condensed to 10^23-26 kg "primordial fog particle" (PFP)
masses. Baryonic dark matter by this theory should be mostly non-aggregated
PFPs that persist in galactic halos. Schild (1996) suggests from quasar
Q0957+561 microlensing that "rogue planets" are "likely to be the missing mass"
of the lens galaxy. Non-baryonic dark matter composed of weakly interacting
massive particles (WIMPs) should condense slowly at large viscous Schwarz
scales to form galaxy supercluster halos, and massive galaxy cluster halos as
observed by Tyson and Fischer (1995) for the rich galaxy cluster Abel 1689.
