title: Erratum.
abstract: In the news story "A firing over formaldehyde" (News and Comment, 7 August 1981, p. 630), the subheadline attributed to Peter F. Infante (Occupational Safety and Health Administration) the position that formaldehyde is a human carcinogen whereas, in fact, his belief is that it is an animal carcinogen. The story also incorrectly reported that mobile home residents are exposed to levels of formaldehyde as high as 10 parts per million (column one, line 28, p. 631). According to a National Academy of Sciences report, the correct level is 4.2 parts per million.