Polarization of the Crab Nebula at 21{middle dot}1-cm Wavelength.

Observations of the polarization distribution of the Crab Nebula at λ 21 ·1 cm made with the Cambridge Half-Mile telescope with a beamwidth of $${47}^{\prime{}\prime}\,\times\,{126}^{\prime{}\prime}$$ arc are discussed. Comparisons with the polarization distributions at optical and shorter radio wavelengths have enabled the rotation and depolarization to be plotted over the nebula. The polarization at λ 21· 1 cm contains unresolved structure which can be attributed to Faraday depolarization in the filaments of the nebula.