Newall, H. F · London : Society for Promoting Christian Knowledge · leaf 181
\ A. THE SOLAR CORONA IN 1900 (MAY 28) PHOTOGEAPHED BYE. E. BABNAED IN NORTH CAROLINA [see p. 100) (The dark disc is the black body of the Moon eclipsing the brightsurface of the Sun)
Spectroscope · Spectrum analysis
Internet Archive · Wellesley College Library · Public Domain Mark 1.0. Free to use for anything.
