If there is any immorality happening in the Cannon House Office Building, it must be the kind you can do with your clothes on. An unwritten but rigidly enforced law against nudity on those premises came to light this week when artist Gerald Lynch was packing up an exhibit of sculptures and drawings that had been displayed for three weeks in the building's rotunda. "Nudes are really what I do," Lynch remarked, "but this show was all heads and hands."

It seems that back in January, when the exhibit was being negotiated, a letter arrived from Capitol Architect George White saying that nudes might be all right for art galleries but "may arouse controversy when exhibited in a congressional office building." About 75 percent of the slides submitted for approval had been nudes, but Lynch managed to put together a show that could be exhibited on those terms. Although a resident of New Jersey, Lynch had been working in Washington for about a year as a stonecutter at the Washington Cathedral. His most recent project there was a creation scene including eight nude figures. Perhaps they'll be put in one of those odd corners where only God can see them.