It is possible to compile a list of observational wishes by combining
whatever is known on DGs in general and what could be expected to be
found. Such observations would include an extension of the FIR survey to
all the late-type DGs in the VC, which would be deeper and more
comprehensive than the
Tuffs et al (2002)
survey. In addition, we would desire a thorough survey to the DGs in the
near-IR; this would allow the understanding of the old stellar
population, better than what the R or I bands are able to
constrain. More HI maps, at least for the HI-rich objects, would allow a
better understanding of the internal ISM dynamics; this should be
combined with H
mapping
with an imaging Fabry-Perot interferometer to
derive the relation between the neutral and the ionized gas
dynamics. More slit spectroscopy should be obtained now that detailed
information about the location of HII regions is available from the
H
images. This would allow the tracing of the metal enrichment within the
disk of the galaxy and should be combined with the internal dynamics. In
the same line, mapping of the CO and other molecules would also be
useful when determining the history of metal enrichment. Finally, all
these observational results are only useful if a comparison sample of
non-cluster galaxies is available. The definition of such a sample, that
would be acceptable by the community, should take a high precedence.