  We demonstrate that the Biermann battery mechanism for the creation of large
scale magnetic fields can arise in a simple model protogalaxy. Analytic
calculations and numerical simulations follow explicitly the generation of
vorticity (and hence magnetic field) at the outward-moving shock that develops
as the protogalactic perturbation collapses. Shear angular momentum then
distorts this field into a dipole-like configuration. The magnitude of the
field created in the fully formed disk galaxy is estimated to be 10^(-17)
Gauss, approximately what is needed as a seed for the galactic dynamo.
