title: Eclipse instrumentation for the solar corona.
abstract: The expedition of the Harvard College Observatory, the Smithsonian Astrophysical Observatory, and the National Geographic Society to Miahuatlán, Mexico, to observe the total solar eclipse of 7 March 1970, is described. Instrumentation included a coronal spectrograph, television cameras recording on videotape, telescopes for photography of coronal polarization, and cameras for direct photography. Photographs and preliminary microphotometer tracings are included.
authors.forename: D H
authors.initials: DH
authors.lastname: Menzel
authors.forename: J M
authors.initials: JM
authors.lastname: Pasachoff