  The effect of a magnetic field on the two long-range-ordered magnetic phases,
the collinear insulating antiferromagnetic (AFI) and the incommensurate
metallic transverse spin density wave (SDW), is investigated for the vanadium
sesquioxide system. A field of 18 T has little effect on the AFI phase of a
nominal V2O3 sample. The transverse SDW phase of V1.96O3 can be suppressed by a
4.6(3)-T magnetic field applied in the plane of spiraling spins, while the same
magnetic field applied along the spiral axis has little effect on the SDW
phase.
