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We present a calculation of the fourth-order (NLO) contribution tospin-dependent Compton scattering in heavy-baryon chiral perturbation theory,and we give results for the four spin polarisabilities. These results have beenpresented before, in hep-ph/0002133. Here we address the issue of whetherone-particle reducible graphs in the heavy baryon theory contribute to thepolarisabilities.Comment: 6 pages, 2 figures, talk given at GDH2000, Mainz, June 14-17 200

SPIN POLARISABILITIES OF THE NUCLEON AT NLO IN THE CHIRAL EXPANSION