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The predictions of £7(12) for the reactions NN -> NN and the crossed processes NN -> NN that follow from contact interactions in conjunction with pole terms are compared with the available experimental data, with particular reference to forward scattering and the threshold limit. The results in the annihilation channel are fairly satisfactory, whereas those in the direct channel are decidedly not so at the low energies where the comparison is effected. With structureless amplitudes the calculations represent the first step of a more complete dispersion treatment which correctly restores the unitarity of the amplitude.