A Popular History of Astronomy During the Nineteenth Century / Fourth Edition

by Agnes M. Clerke

[1446] Ibid.

[1447] Astroph. Jour., vol. v., p. 1; Newall, Month. Not., vol. lvii., p. 575.

[1448] Bull. de l'Acad. de St. Pétersb., tt. vi., viii.

[1449] Astroph. Jour., vol. x., p. 177; Month. Not., vol. lx., p. 418; Vogel, Sitzungsb., Berlin, April 19, 1900.

[1450] Month. Not., vol. lx., p. 595.

[1451] Hussey, Astr. Jour., No. 484.

[1452] Astroph. Jour., vols. x, p. 180; xiv., p. 140; Lick Bulletin, No. 4; Bélopolsky, Astr. Nach., No. 3,637.

[1453] The significance of the name "El Ghoul" leaves little doubt that the Arab astronomers took note of this star's variability. E. M. Clerke, Observatory, vol. xv., p. 271.

[1454] Phil. Trans., vol. lxxiii., p. 484.

[1455] Proc. Amer. Acad., vol. xvi., p. 17; Observatory, vol. iv., p. 116. For a preliminary essay by T. S. Aldis, see Phil. Mag., vol. xxxix., p. 363, 1870.