  A search for stable and long-lived heavy charged particles used the data
taken by the DELPHI experiment at energies from 130 to 183 GeV. The Cherenkov
light detected in the Ring Imaging Cherenkov Detector and the ionization loss
measured in the Time Projection Chamber identify heavy particles from masses of
2 to nearly 89 GeV/c^2. Upper limits are given on the production cross-section
and masses of sleptons, free squarks with a charge of $q = \pm 2/3e$ and
hadronizing squarks.
