Abstracts of forthcoming papers

A new polarimeter is described which allows the simultaneous determination of the four Stokes parameters analysing the electric signal both in frequency and phase. The signal consists of two frequencies and 2 . From the 2 component the amount and the azimuth of linearly polarized light is obtained by using a two-phase lock-in amplifier (or two separate amplifiers). From the component the circular polarization is obtained. Instrumental and spurious effects, caused by rotating elements, are avoided. Magnetographic applications in solar physics and improvements as compared to previous magnetographs are suggested.