The cited paper (Solid State Ionics, Vol. 62 (1993) 273-277) on the pe
rformance and the results of Hebb-Wagner polarized cell measurements o
n Na-beta-alumina reveals certain misunderstandings as to the fundamen
tals of the used method. Since this to some extent influences the obta
ined results and their interpretation, the questionable topics will cr
itically be discussed in the following.