  Some integration formulas which either occur or are implicit in Ha's recent
exact calculation of some correlations in the Calogero-Sutherland model are
discussed. These integration formulas include the calculation of the inner
product $<0|\rho (0)|\kappa>$ between the density operator acting on an excited
state and the ground state, and a generalization of the Selberg integral due to
Dotsenko and Fateev.
