  We consider a classical condensed matter theory in a Newtonian framework
where conservation laws
  \partial_t \rho + \partial_i (\rho v^i) = 0
  \partial_t (\rho v^j) + \partial_i(\rho v^i v^j + p^{ij}) = 0
  are related with the Lagrange formalism in a natural way. For an ``effective
Lorentz metric'' g_{\mu\nu} it is equivalent to a metric theory of gravity
close to general relativity with Lagrangian
  L = L_{GR}
  - (8\pi G)^{-1}(\Upsilon g^{00}-\Xi (g^{11}+g^{22}+g^{33}))\sqrt{-g}
  We consider the differences between this theory and general relativity (no
nontrivial topologies, stable frozen stars instead of black holes, big bounce
instead of big bang singularity, a dark matter term), quantum gravity, and the
connection with realism and Bohmian mechanics.
