We have measured the thermoelectric power and Hall effect on three Co-
Al-O granular films whose conduction mechanism varies from metallic to
tunneling type depending on O content. We obtained a finite thermoele
ctric power (TEP) which decreases with increasing resistivity. In the
tunneling type sample, a large field dependence of TEP correlated with
the magnetoresistance has been observed. The Hall coefficient of Co-A
l-O decreases with, increasing sample resistivity, in contrast with th
e giant Hall effect reported for Ni-SiO2 granular sample with a simila
r resistivity. The dominant electronic conduction mechanisms are found
to be different between the giant magnetoresistance and the giant Hal
l effect in ferromagnetic-metal-oxide granular systems.