Calculation of diffuse scattering from simulated disordered crystals: a comparison with optical transforms. Erratum

In the paper by Butler & Welberry [J. Appl. Cryst. (1992), 25, 391-399], the half-tone figures (Figs. 2, 4, 5 and 6) were poorly reproduced by the printer. These figures are published here with better reproduction.