  We report measurements of the Nernst effect and of the magneto-resistance of
granular aluminum films near the metal to insulator transition. These films
show sharp transitions as a function of temperature and magnetic field. At low
temperatures the Nernst signal displays a sharp peak at a field where more than
90% of the normal state resistance has been restored, suggesting a transition
involving entropy transport after superconducting coherence has been destroyed.
At temperatures higher than the critical temperature the fluctuation
paraconductivity scales with the Nernst signal, in agreement with a description
in terms of fluctuations of the order parameter.
