  Transmission spectra of H$_2$O+CO$_2$ mixtures have been recorded, at 296,
325 and 366 K, for various pressures and mixture compositions using two
experimental setups. Their analysis enables to retrieve values of the
'continuum' absorption by the CO$_2$-broadened H$_2$O line wings between 100
and 1500 cm$^{-1}$. The results are in good agreement with those, around 1300
cm$^{-1}$, of the single previous experimental study available. Comparisons are
also made with direct predictions based on line-shape correction factors $\chi$
calculated, almost thirty years ago, using a quasistatic approach and an input
H$_2$O-CO$_2$ intermolecular potential. They show that this model quite nicely
predicts, with slightly overestimated values, the continuum over a spectral
range where it varies by more than three orders of magnitude. An empirical
correction is proposed, based on the experimental data, which should be useful
for radiative transfer and climate studies in CO$_2$ rich planetary
atmospheres.
