  We report preliminary measurements of absolute hadronic branching fractions
of Ds mesons determined using a double tag technique. These measurements are
from 195 pb^{-1} of e+e- collisions recorded at center of mass energies near
4.17 GeV with the CLEO-c detector at CESR. We obtain absolute branching
fractions for Ds+ decays to KS0 K+, K- K+ pi+, K- K+ pi+ pi-, pi+ pi+ pi-, pi+
eta, and pi+ etaprime. We discuss the problems inherent in measuring accurately
the branching fraction for Ds+ to phi pi+, which is often used as a reference
mode for measurement of other Ds+ branching fractions, and provide a
measurement of a branching fraction that may be useful for this purpose.
