A Spectrograph Atlas of the Solar Corona from λ 3000 to λ 6900 (2 of 2), 1962

Subtitle: “Based on plates taken at Khartoum during the total solar eclipse of February 25, 1952, by Dr. B. Lyot, Meudon Observatory, and Dr. M. K. Aly, Helwan Observatory.” Paper by M. K. Aly, J. W. Evans, and F. Q. Orrall; Helwan Observatory, Egypt, and Sacramento Peak Observatory, Air Force Cambridge Research Laboratories, Sunspot, New Mexico. This file contains a paper, photograph negatives, and photographic prints, as well as a custom library enclosure.