  We present an upper limit on the polarization of the Cosmic Microwave
Background at 7 degree angular scales in the frequency band between 26 and 36
GHz, produced by the POLAR experiment. The campaign produced a map of linear
polarization over the R.A. range 112 degrees - 275 degrees at declination
43degrees. The model-independent upper limit on the E-mode polarization
component of the CMB at angular scales l = 2 - 20 is 10 microKelvin (95%
confidence). The corresponding limit for the B-mode is also 10 microKelvin.
Constraining the B-mode power to be zero, the 95% confidence limit on E-mode
power alone is 8 microKelvin.
