The profiles of the absorption lines in cepheids (their width, asymmetry, and doubling) have to be interpreted in terms of the motions throughout the reversing layer. To cover the entire volume of the reversing layer one has to integrate both over the surface of the visible hemisphere and throughout the depth of the reversing layer. The effect of the surface integration has already been discussed in this symposium by Dr Savedoff. Here will be discussed the effects of the depth integration.