LXXXVII. Non-symmetric stress-energy-momentum tensor and spin-density

The question of the physical meaning of a non-symmetric stress-energy-momentum tensor is discussed. It is shown that an antisymmetric part of this tensor arises necessarily if there are particles with spin which must be considered as point particles. Some formulae connecting the anti-symmetric part of T ik and the spin density are derived. It is shown that the unified field theory of Einstein and Straus with non-symmetric metrical tensor does not lead to an explanation of geomagnetism.