title: Erratum.
abstract: In the article "Electron microscope center opens at Berkeley" (Research News, 27 Mar., p. 1407), reference is made to the 1.2-MeV (million electron volts) high voltage electron microscope at the State University of New York at Albany. That instrument is owned by the state of New York and operated and supported by the New York State Department of Health, not by the National Institutes of Health.