New series of rigid and non-rigid Earth nutation. Comparison
    with observations

         J. Souchay


   After analysing the recent developments of the theory of the
nutation for a simplified rigid Earth model (Kinoshita and Souchay,
1990) with new corrections and new contributions (Souchay and
Kinoshita,1995), we will study the effect of these developments on the
calculation of the coefficients of nutation for a non-rigid Earth
model, based on the transfer function given by Wahr(1979). The
relative improvements characterized by the residuals with the
observations will be discussed.