Abstract:
Optical linear polarization measurements for stars in the regions of the molecular clouds B 227 and L 121 are presented. The magnetic field geometry in the clouds as indicated by the polarization maps is discussed in relation to their morphology. In the outer parts of B 227 the field is more or less parallel to the long axis of the cloud while in L 121 it appears to be parallel to the short axis. The wavelength dependence of polarization for two stars in the region of B 227 is found to be anomalous.
