Observations for broad-band circular polarization in white dwarfs and nuclei of planetary nebulae.

Observations have been made to search for broad-band optical circular polarization in the radiation from eight white dwarfs, four planetary nuclei, and the peculiar blue variable CoD- . All results are negative with the exception of a possible effect in the central star of He 2-131. Subject headings: planetary nebulae - polarization - white-dwarf stars