Note 21 — SECTION IV. THE SOLAR SPECTRUM, SPECTRUM ANALYSIS, SPECTRA OF GASES AND VOLATILIZED MATTER, INVERSION OF COLOURED LINES, CONSTITUTION OF SUN AND STARS.
Reading edition
Dr. W. A. Miller has shown that these invisible highly refrangible rays exist in the vapours of all metals, and has obtained photographs of their spectra (see Phil. Trans. 1862, p. 876), which correspond to the spectra of fluorescence.