[en] According to a proposal of Lloyd-Evans (1985), the average charge of particles in the cosmic radiation near 10¹⁴ eV can be determined by observing the effect of the solar magnetic field on the Sun's shadow in the angular distribution of energetic primary cosmic ray particles. This suggestion is shown to be realizable with a new type of EAS-array proposed for the purpose of high energy γ-ray astronomy. The same measurement provides information on the integrated strength of the solar magnetic field. As the array will be sensitive and provide good angular resolution down to a few times 10¹² eV, more detailed results on the primary composition near 10¹³ eV can be obtained by investigating the shape of the shadow of the Moon as affected by the geomagnetic field. (orig.)