  Regularities in the hadron interaction energies are used to obtain formulas
relating the masses of ground-state hadrons, most of which contain heavy
quarks. Inputs are the constituent quark model, the Feynman-Hellmann theorem,
and the structure of the colormagnetic interaction of QCD. Some of the formulas
can also be obtained from heavy quark effective theory or from
diquark-antiquark supersymmetry. It is argued that the sum rules are more
general than the model from which they are obtained. Where data exist, the
formulas agree quite well with experiment, but most of the sum rules proposed
provide predictions of heavy baryon masses that will be useful for future
measurements.
