  $DA{\Phi}NE$ should be useful for testing the nature of the vector mesons
directly produced in $e^-e^+$ annihilation, as well as the nature of the $C=+$
states produced in the radiative decays of these vector mesons. In the
$DA{\Phi}NE$ energy range, these latter states may have spin up to two and any
parity. Provided the background can be handled and the spin of the produced
state is known, the study of the angular distributions in these decays can
measure the parity of the produced meson as well as the ratios of the
independent production helicity amplitudes. These ratios provide sensitive
tests for quark model classification of the states, in particular the enigmatic
$f_1(1420)$. Thus, they can be used to indicate whether the mesons involved are
consistent with the usual $q \bar q$ interpretation, or whether other
interpretations like \eg\,hybrid, glueball or multiquark, are more favorable
for some of them.
