, p. 152; Campbell,
_Observatory_, vol. xxiv., p. 360.]

[Footnote 1499: _Pop. Astr._, March, 1895, p. 307.]

[Footnote 1500: _Harvard Circular_, No. 4, December 20, 1895. The first
Nova Persei was spectrographically recorded in 1887.]

[Footnote 1501: Vogel, _Sitzungsb._, Berlin, April 19, 1900, p. 389.]

[Footnote 1502: Sidgreaves, _Observatory_, vol. xxiv., p. 191.]

[Footnote 1503: _Ibid._, _Knowledge_, vol. xxv., p. 10.]

[Footnote 1504: _Lick Bulletin_, No. 8.]

[Footnote 1505: _Astr. Nach._, No. 3,736.]

[Footnote 1506: _Astroph. Jour._, vol. xiv., p. 167.]

[Footnote 1507: _Lick Bulletin_, No. 10.]

[Footnote 1508: _Astroph. Jour._, vols. xiv., p. 293; xv., p. 129.]

[Footnote 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.]

[Footnote 1510: _Phil. Trans._, vol. cliv., p. 437.]

[Footnote 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.]

[Footnote 1512: Scheiner, _Astr. Nach._, No. 3,476; _Astroph. Jour._,
vol. vii., p. 231; Campbell, _Ibid._, vols. ix., p. 312; x., p. 22.]

[Footnote 1513: _Proc. Roy. Soc._, vols. xlvi., p. 40; xlviii., p. 202.]

[Footnote 1514: _Publ. Astr. Pac. Soc._, vol. ii., p. 265; _Proc. Roy.
Soc._, vol. xlix., p. 399.]

[Footnote 1515: _Astr. Nach._, No 3,549.]

[Footnote 1516: _Atlas of Stellar Spectra_, p. 125.]

[Footnote 1517: _Knowledge_, vol. xix., p. 39.]

[Footnote 1518: _Astr. Nach._, Nos. 1,366, 1,391, 1,689; Chambers,
_Descriptive Astr._ (3rd ed.), p. 543; Flammarion, _L'Univers Sideral_,
p. 818.]

[Footnote 1519: _Month. Not._, vol. li., p. 94.]

[Footnote 1520: _Ibid._, vol. lix., p. 372.]

[Footnote 1521: _Ibid._, vol. lx., p. 424.]

[Footnote 1522: Dreyer, _Ibid._, vol. lii., p. 100.]

[Footnote 1523: _Wash. Obs._, vol. xxv., App. 1.]

[Footnote 1524: _Am. Jour. of Sc._, vol. xiv., p. 433; C. Dreyer,
_Month. Not._, vol. xlvii., p. 419.]

[Footnote 1525: _Ibid._, vol. li., p. 496.]

[Footnote 1526: Reproduced in _Knowledge_, April, 1893.]

[Footnote 1527: Unless an exception be found in the Pleiades nebulae,
which may be assumed to share the small apparent movement of the stars
they adhere to.]

[Footnote 1528: