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

by Agnes M. Clerke

[803] Wash. Obs. for 1876, Part ii., p. 34.

[804] Pop. Astr., vol. ii., p. 168; Astr. Jour., No. 335.

[805] Astr. and Astrophysics, vol. xiii., p. 866.

[806] Ibid., p. 867.

[807] Month. Not., vol. xxiv., p. 18.

[808] Ibid., vol. xxiii., p. 234 (Challis).

[809] Untersuchungen über die Spectra der Planeten, p. 9.

[810] Sirius, vol. vii., p. 131.

[811] Potsdam Publ., No. 30; Astr. Nach., No. 3,171; Frost, Astr. and Astrophysics, vol. xii., p. 619.

[812] Zöllner and Winnecke made it=O·13, Astr. Nach., No. 2,245.