A story in Wednesday's editions misidentified the compound used by Harvard scientists in experiments with radiation at the Wrentham (Mass.) State School in 1962. The correct name f the compound is sodium iodide.

Peter T. Ellison was misidentified on page one of yesterday's paper. He is chair of the Anthropology Department.

The name of Kyle Snowden, 97, a forward on the men's basketball team, was misspelled in a photo caption on page 10 of yesterday's paper.