  We observed a total of 13 low-redshift AGN with the Hopkins Ultraviolet
Telescope (HUT) during the course of the Astro-1 and Astro-2 missions. Of
these, 4 show intrinsic Lyman limit absorption---NGC 1068, NGC 4151, NGC 3516
and NGC 3227. All galaxies with optically thick Lyman limits have extended
narrow-line regions with bi-polar morphologies. All AGN with no absorption are
Seyfert 1's with compact NLR's. These observations support geometrical
shadowing as the means for collimating the ionizing radiation in unified models
of AGN, most likely in a photoionized atmosphere above the obscuring torus.
