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

by Agnes M. Clerke

[903] The Ice Age in North America, London, 1890.

[904] Phil. Trans., vol. lxviii., p. 783.

[905] Comptes Rendus, t. lxxvi., p. 954.

[906] Potsdam Publ., Nos. 22, 23.

[907] Phil. Trans., vol. clxxxii., p. 565; Adams Prize Essay for 1893.

[908] Denkschriften Akad. der Wiss. Wien, Bd. lxiv.; quoted by Poynting. Nature, vol. lxii., p. 404.

[909] Report on the Geodetic Survey of S. Africa, 1894.

[910] Nature, vol. lxii., p. 622; Hollis, Observatory, vol. xxiii., p. 337; Poincaré, Comptes Rendus, July 23, 1900.

[911] Astr. Nach., No. 2,228.

[912] Young's Gen. Astr., p. 601.