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

by Agnes M. Clerke

[172] Mém. de l'Ac. des Sciences, 1715, pp. 161, 166-169.

[173] Ed. Ency., art. Astronomy, p. 635.

[174] Trans. Am. Phil. Soc., vol. vi., p. 274.

[175] Memoir of Caroline Herschel, p. 327.

[176] Phil. Trans., vol. xxv., p. 2240.

[177] Ibid., vol. xl., p. 182.

[178] Ibid., vol. xlv., p. 586.

[179] Mem. R. A. S., vol. i., pp. 145, 148.

[180] American Journal of Science, vol. xlii., p. 396.

[181] Phil. Trans., vol. xxxviii., p. 134. Father Secchi, however, adverted to a distinct mention of a prominence observed in 1239 A.D. A description of a total eclipse of that date includes the remark, "Et quoddam foramen erat ignitum in circulo solis ex parte inferiore" (Muratori, Rer. It. Scriptores, t. xiv., col. 1097). The "circulus solis" of course signifies the corona.