  On the measurement of thermoelectric power and Nernst coefficient, we used
two kinds of shapes for a sample. One is "Bridge shape" and the other is, we
call,"Fat-Bridge shape". The latter has 5 times wider main body than the
former. We used pure n-InSb in this experiment, whose carrier condensation
measured at 77K was $6.6 \times 10^{-14} cm^{-3}.$ The length of sample is 17mm
and temperature difference induced between the edges in that direction were
about $10^{\circ}$C or $100^{\circ}$C near a room temperature range of 0 to
$100^{\circ}$C. Magnetic induction applied in the perpendicular direction to
temperature gradient was in the range of 0 up to 4 Tesla. In the case of
"Fat-Bridge shape", we detected about 10% smaller Nernst coefficient and 1 to
10% smaller thermoelectric power comparing to the "Bridge shape". We suppose
this phenomena is due to the geometric contribution on the different shape of
samples.
