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

by Agnes M. Clerke

[81] Mem. Roy. Astr. Soc., vols. xxviii. and xxxii.

[82] Ibid., vol. xlvii., p. 327.

[83] Mémoires de St. Pétersbourg, t. xxxv., No. 3, 1887; revised in Astr. Nach., Nos. 3,729-30, 1901.

[84] Astronomical Journal, Nos. 213, 501.

[85] Astr. Nach., Nos. 2,999, 3,000.

[86] Veröffentlichungen der Grossh. Sternwarte zu Karlsruhe, Bd. iv., 1892.

[87] Proceedings Amsterdam Acad. of Sciences, Jan. 27, 1900.

[88] Astr. Jour., No. 457.

[89] Ibid., Nos. 276, 497.

[90] Phil. Trans., vol. xcvi., p. 230.