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

by Agnes M. Clerke

[1506] Astroph. Jour., vol. xiv., p. 167.

[1507] Lick Bulletin, No. 10.

[1508] Astroph. Jour., vols. xiv., p. 293; xv., p. 129.

[1509] Cf. the theories on the subject of M. Wolf, Astr. Nach., Nos. 3,752, 3,753; Kapteyn, Ibid., No. 3,756; F. W. Very, Ibid., No. 3,771; and W. E. Wilson, Proc. Roy. Dublin Soc., No. 45, p. 556.

[1510] Phil. Trans., vol. cliv., p. 437.

[1511] Phil. Trans., vol. clviii., p. 540. The true proportion seems to be about one-tenth (Harvard Annals, vol. xxvi., pt. ii., p. 205), the Tulse Hill working-list having been formed of specially selected objects.

[1512] Scheiner, Astr. Nach., No. 3,476; Astroph. Jour., vol. vii., p. 231; Campbell, Ibid., vols. ix., p. 312; x., p. 22.

[1513] Proc. Roy. Soc., vols. xlvi., p. 40; xlviii., p. 202.

[1514] Publ. Astr. Pac. Soc., vol. ii., p. 265; Proc. Roy. Soc., vol. xlix., p. 399.

[1515] Astr. Nach., No 3,549.