[en] It has been suggested that pressure shifts are the sole cause for the systematic blue shift of solar Fraunhofer lines (Hart, 1974). To check this the significance of pressure shifts for Fe I lines is evaluated. The observed wavelength shifts of a large number of lines are compared with the shifts calculated for the Lennard-Jones potential following Hindmarsh et al. (1967). The Lennard-Jones poetential for the interatomic forces yield pressure shifts caused by neutral hydrogen, which explain only a small fraction of the observed blue shift. It is also shown that the quadratic Stark effect contributes insignificantly to the position of Fe I lines. (Auth.)