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

by Agnes M. Clerke

[91] Mém. Prés. à l'Ac. de St. Pétersbourg, t. iii., p. 603 (read Feb. 5, 1837).

[92] Die Centralsonne, Astr. Nach., Nos. 566-567, 1846.

[93] Sir J. Herschel, note to Treatise on Astronomy, and Phil. Trans., vol. cxxiii., part ii., p. 502.

[94] The position is (as Sir J. Herschel pointed out, Outlines of Astronomy, p. 631, 10th ed.) placed beyond the range of reasonable probability by its remoteness (fully 26°) from the galactic plane.

[95] Mädler in Westermann's Jahrbuch, 1867, p. 615.

[96] Letter from Bessel to Sir J. Herschel, Month. Not., vol. vi., p. 139.

[97] Wolf, Gesch. d. Astr., p. 743, note.

[98] Astr. Nach., Nos. 745-748.

[99] Astr. Jour., No. 440.

[100] Adopting Elkin's revised parallax for Procyon of 0·325′.