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

by Agnes M. Clerke

[1606] Harvard Annals, vol. xiv., pt. i., 1884.

[1607] Observatory, vol. viii., p. 309.

[1608] Month. Not., vol. xlvi., p. 277.

[1609] Harvard Annals, vol. xxxiv.

[1610] Ibid., vol. xlv.

[1611] Carte Phot. du Ciel. Réunion du Comité Permanent, Paris, 1891, p. 100.

[1612] Essays (2nd ser.), The Nebular Hypothesis.

[1613] On the Plurality of Worlds, p. 214 (2nd ed.).

[1614] Proctor, Month. Not., vol. xxix., p. 342.

[1615] This remark was first made by J. Michell, Phil. Trans., vol. lvii., p. 25 (1767).