MacClean [McClean], Frank, 1837-1904. **F.12.6 Comparative photographic spectra of the high sun & the low sun, from (H) to (A). Sections 1-13. By F. McClean. —  [London. 1890.] 5 plates in 1 portfolio. 54 cm. With this were issued two articles by the author entitled: Comparative photographs of the high sun and low sun visible spectra with notes on the method of photographing the red end of the spectrum. Reprinted from the Monthly notices of the Royal Astronomical Socjety, vol. 51, no. 1; and Photographs of the red end of the solar spectrum from the line (D) to the line (A) in seven sections. Reprinted from the Monthly notices of the Royal Astronomical Society, vol. 49, no. 3.
This card was printed at the Boston a Public Library, July 5, 1934. } 3
D5039 — Spectrum. Solar,