A very com plete study of the light curve of th e irregular cluster type sta r A R. H er has been made by J. Balâsz and L. D etre. The light curves published by these authors have been analysed by the m ethod of the autocorrelation function and subsequent power series. In th e diagram log P: A(2), the variable falls in the norm al region of th e irregular Systems, but during the secular changes of th e light curve the point A(2) sh ifts up and down in the correlation plane.