  We obtain the baryon number density, n, and the excess contribution to the
pressure, Delta P, at finite chemical potential, mu_B, and temperature, T, by
resumming the Taylor series expansion in a lattice computation with lattice
spacing of 1/(4T) and two flavours of quarks at three different quark masses.
The method proceeds by giving a critical mu_B and limits on the critical
exponent, and permits reliable estimations of the errors in resummed
quantities. We find that n and Delta P are insensitive to the quark mass. We
also report the bulk isothermal compressibility, kappa, over a range of T and
mu_B.
