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

by Agnes M. Clerke

[1516] Atlas of Stellar Spectra, p. 125.

[1517] Knowledge, vol. xix., p. 39.

[1518] Astr. Nach., Nos. 1,366, 1,391, 1,689; Chambers, Descriptive Astr. (3rd ed.), p. 543; Flammarion, L'Univers Sidéral, p. 818.

[1519] Month. Not., vol. li., p. 94.

[1520] Ibid., vol. lix., p. 372.

[1521] Ibid., vol. lx., p. 424.

[1522] Dreyer, Ibid., vol. lii., p. 100.

[1523] Wash. Obs., vol. xxv., App. 1.

[1524] Am. Jour. of Sc., vol. xiv., p. 433; C. Dreyer, Month. Not., vol. xlvii., p. 419.

[1525] Ibid., vol. li., p. 496.