Comments on the short communication, A statistical evaluation of absorption by C. Katayama, N. Sakabe & K. Sakabe

In a recent paper by Katayama, Sakabe & Sakabe [Acta Cryst. (1972), A28, 293] some principles of an empirical absorption correction method are described. These have been published previously [Kopfmann & Huber (1968). Acta Cryst. A24, 348].