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

by Agnes M. Clerke

[971] Beiträge, p. 124.

[972] Mem. R. A. Soc., vol. xxxii., p. 183.

[973] Astr. Nach., No. 1,468.

[974] Observatory, vol. viii., p. 437.

[975] Month. Not., vols. xxviii., p. 37; xxix., p. 232; xxxiii., p. 552.

[976] Flammarion, L'Astronomie, t. i., p. 266.

[977] Smyth, Cel. Cycle, vol. i., p. 148 (1st ed.).

[978] Phil. Trans., vol. cxxi., p. 417.

[979] Month. Not., vol. xxv., p. 227.

[980] Phil. Mag., vol. xxxiv., p. 75.