Page:Popular Science Monthly Volume 27.djvu/425

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SKETCH OF PROFESSOR S. P. LANGLEY.
409
No. Date. Title or subject. Where published.
20 July, 1877. Possibility of Transit Observations without Personal Error. "American Journal of Science," July, 1877.
21* April, 187.8 Electric Time-Service. "Harper's Monthly," April.
22 April, 1878. Photographs and Optical Studies. "American Journal of Science," April.
23 June, 1878. Transit of Mercury of May 6th. "American Journal of Science," June.
24* 1878–1879 Six Articles on the Sun. "Scientific American."
25 October, 1878. Pike's Peak Observations of Eclipse of 1878. Washington Observatory publication.
26 October, 1878. Remarkable Groups in Lower Spectrum (A and B lines). "Proceedings of the American Academy."
27 October, 1878. Temperature of the Sun (Bessemer Converter, etc.) "Proceedings of the American Academy."
28 August, 1879. Saratoga Address as Vice-President of the American Association. "American Association."
29 July, 1880. Observations on Mount Etna. "American Journal of Science."
30* July, 1880. Wintering on Etna. "Atlantic Monthly," July.
31 January, 1881. The Bolometer and Radiant Energy. "Proceedings of the American Academy."
32 March, 1881. The Actinic Balance. "American Journal of Science."
33 March, 1881. Sur la Distribution de l'Énergie, etc. "Comptes Rendus."
34 March, 1881. Distribution de l'Énergie. "Comptes Rendus."
35 March, 1881. Distribution de l'Énergie. "Annales de Chimie et de Philosophie."
36 September, 1882. Observations du Spectre Solaire. "Comptes Rendus."
37 October, 1882. Sunlight and Skylight. "Nature." See, also, "American Journal of Science."
38 December, 1882. Transit of Venus. "Monthly Notices of the Royal Astronomical Society." See, also, Ast. Nach.
39 March, 1883. Selective Absorption of Solar Energy. "American Journal of Science."
See, also, Weidemann's "Annalen," "Annales de Chimie et de Philosophie," London edition; and Dublin "Philosophical Magazine," for republication in full.
40 June, 1883. The Spectrum of an Argand Burner. "Science." June, 1883.
41 March, 1884. On the Measurement of Wavelengths etc. "American Journal of Science."
See, also, above-cited journals for republication in full.
42 September, 1884. Amount of the Atmospheric Absorption. "American Journal of Science." See, also, London edition, and "Dublin Philosophical Magazine."
43* September, 1884. The New Astronomy. "Century Mag.," September.
44* October, 1884. The New Astronomy. "Century Mag.," October.
45* December, 1884. The New Astronomy. "Century Mag.," December.
46 1885. Researches on Solar Heat. "Signal-Service Professional Papers, No. 13."

Note.—The above list omits numerous minor publications. It includes original contributions to science (the more important in italics), and articles of a popular character (marked with *).