[Footnote 1582: _Annals of the Cape Observatory_, vol. viii., pt. ii.

Some of the measures were made by Messrs. Finlay and de Sitter.]

[Footnote 1583: _Astr. Nach._, No. 3,483; _Observatory_, vol. xxi., p.

180.]

[Footnote 1584: _Annalen der Sternwarte in Leiden_, Bd. vii.]

[Footnote 1585: _Report of Harvard Conference in 1898_ (Snyder).]

[Footnote 1586: _Researches in Stellar Parallax_, pt. ii., 1892.]

[Footnote 1587: _V. J. S. Astr. Ges._, Jahrg., xxviii., p. 117.]

[Footnote 1588: _Bulletin de la Carte du Ciel_, No. 1, p. 262.]

[Footnote 1589: _Publ. of the Astr. Laboratory at Groningen_, No. 1.]

[Footnote 1590: _Nature_, vol. xxvi., p. 177.]

[Footnote 1591: _Proc. R. Irish Acad._, vol. i., p. 571, ser. iii.]

[Footnote 1592: _Mem. R. A. S._, vol. xlvii., p. 178.]

[Footnote 1593: _Astr. Nach._, No. 3,142.]

[Footnote 1594: _Publ. Astr. Pac. Soc._, No. 76.]

[Footnote 1595: Campbell, _Lick Bulletin_, No. 4.]

[Footnote 1596: _Publ. Yerkes Observatory_, vol. i., 1900.]

[Footnote 1597: _Annals Cape Observatory_, vol. ii., pt. ii.]

[Footnote 1598: _Astr. Jour._, Nos. 431-2.]

[Footnote 1599: W. J. Hussey, _Publ. Astr. Pac. Soc._, No. 74.]

[Footnote 1600: _Astr. Jour._, No. 258.]

[Footnote 1601: _Sitzungsberichte_, Berlin, October 26, 1893.]

[Footnote 1602: _Annales de l'Obs. de Nice_, t. ii.]

[Footnote 1603: _Washington Observations_, 1888, App. i.]

[Footnote 1604: _Publ. Lick Observatory_, vol. v., 1901.]

[Footnote 1605: T. Lewis, _Observatory_, vol. xvi., p. 312.]

[Footnote 1606: _Harvard Annals_, vol. xiv., pt. i., 1884.]

[Footnote 1607: _Observatory_, vol. viii., p. 309.]

[Footnote 1608: _Month. Not._, vol. xlvi., p. 277.]

[Footnote 1609: _Harvard Annals_, vol. x.x.xiv.]

[Footnote 1610: _Ibid._, vol. xlv.]

[Footnote 1611: _Carte Phot. du Ciel. Reunion du Comite Permanent_, Paris, 1891, p. 100.]

[Footnote 1612: _Essays_ (2nd ser.), _The Nebular Hypothesis_.]

[Footnote 1613: _On the Plurality of Worlds_, p. 214 (2nd ed.).]

[Footnote 1614: Proctor, _Month. Not._, vol. xxix., p. 342.]

[Footnote 1615: This remark was first made by J. Mich.e.l.l, _Phil.

Trans._, vol. lvii., p. 25 (1767).]

[Footnote 1616: _Pop. Astr._, No. 45.]

[Footnote 1617: _Astroph. Jour._, vol. i., p. 220.]

[Footnote 1618: _Month. Not._, vols. x.x.xi., p. 175; x.x.xii., p. 1.]

[Footnote 1619: _The Stars_, p. 273.]

[Footnote 1620: _System of the Stars_, p. 384; _Old and New Astronomy_, p. 749 (Ranyard).]

[Footnote 1621: _Astroph. Jour._, vol. xii., p. 156.]

[Footnote 1622: _Publ. Astr. Pac. Soc._, vol. ii., p. 242.]

[Footnote 1623: _Month. Not._, vol. li., pp. 40, 97. For reproductions of some of the photographs in question, see _Knowledge_, vol. xiv., p.

50.]

[Footnote 1624: _Astr. Nach._, No. 3,048; _Observatory_, vol. xiv., p.

301.]

[Footnote 1625: _Proc. Roy. Inst._, May 29, 1891 (Gill).]

[Footnote 1626: _Annals Cape Obs._, iii., Introduction, p. 22.]

[Footnote 1627: _Proc. Roy. Soc._, vol. xviii., p. 169.]

[Footnote 1628: _Astr. Nach._, No. 3,456; _Observatory_, vol. xxi., p.

65; Newcomb, _The Stars_, p. 80.]