  The information entropies in coordinate and momentum spaces and their sum
($S_r$, $S_k$, $S$) are evaluated for many nuclei using "experimental"
densities or/and momentum distributions. The results are compared with the
harmonic oscillator model and with the short-range correlated distributions. It
is found that $S_r$ depends strongly on $\ln A$ and does not depend very much
on the model. The behaviour of $S_k$ is opposite. The various cases we consider
can be classified according to either the quantity of the experimental data we
use or by the values of $S$, i.e., the increase of the quality of the density
and of the momentum distributions leads to an increase of the values of $S$. In
all cases, apart from the linear relation $S=a+b\ln A$, the linear relation
$S=a_V+b_V \ln V$ also holds. V is the mean volume of the nucleus. If $S$ is
considered as an ensemble entropy, a relation between $A$ or $V$ and the
ensemble volume can be found. Finally, comparing different electron scattering
experiments for the same nucleus, it is found that the larger the momentum
transfer ranges, the larger the information entropy is. It is concluded that
$S$ could be used to compare different experiments for the same nucleus and to
choose the most reliable one.
