title: Clarification.
abstract: A News & Comment article by Jon Cohen about an investigation of indirect costs charged by the National Academy of Sciences (NAS) to federal grants and contracts (22 Nov., p. 1103) reported that congressional staff members had inquired about a condominium owned by the Academy at the Watergate building. The article should have noted that NAS officials responded that the apartment, which has served as the residence of the NAS president for 25 years, is not charged to indirect costs but is paid for entirely with private funds.