A Popular History of Astronomy During the Nineteenth Century Part 20

[Footnote 441: _Proc. Roy. Society_, vol. xvi., p. 29.]

[Footnote 442: _Recherches sur le Spectre Solaire_, p. 38.]

[Footnote 443: _Am. Jour. of Science_, 1881, vol. xxi., p. 41. Hastings stipulated only for some member of the triad, carbon, silicon, and boron.]

[Footnote 444: Ranyard, _Knowledge_, vol. xvi., p. 190.]

[Footnote 445: Young, _The Sun_, p. 337, ed. 1897.]

[Footnote 446: H. Draper, _Quart. Journ. of Sc._, vol. i., p. 381; also _Phil. Mag._, vol. xvii., 1840, p. 222.]

[Footnote 447: Reproduced in Arago's _Popular Astronomy_, plate xii., vol. 1.]

[Footnote 448: _Report Brit. a.s.s._, 1859, p. 148.]

[Footnote 449: _Phil. Trans._, vol. clii., p. 407.]

[Footnote 450: _Researches in Solar Physics_, part i., p. 20.]

[Footnote 451: Both the phrase and the method were suggested by Faye, who estimated the average depth of the luminous sheath of spots at 2,160 miles. _Comptes Rendus_, t. lxi., p. 1082; t. xcvi., p. 356.]

[Footnote 452: _Month. Not._, vol. lv., p. 74.]

[Footnote 453: Sidgreaves, _Ibid._, p. 282; Cortie, _Ibid._, vol.

lviii., p. 91.]

[Footnote 454: Explained by East as refraction-effects. _Jour. Brit.

Astr. a.s.s._, vol. viii., p. 187.]

[Footnote 455: _Proc. Roy. Soc._, vol. xiv., p. 39.]

[Footnote 456: _Potsdam Publicationen_, No. 18; _Astr. Nach._, Nos.

3,000, 3,287.]

[Footnote 457: Faye, _Comptes Rendus_, t. cxi., p. 77; Belopolsky, _Astr. Nach._, No. 2,991.]

[Footnote 458: _Ibid._, Nos. 3,275, 3,344.]

[Footnote 459: Lockyer, _Contributions to Solar Physics_, p. 70.]

[Footnote 460: _Le Soleil_, p. 87.]

[Footnote 461: _Proc. Roy. Soc._, vol. xv., p. 256.]

[Footnote 462: _Phil. Mag._, vol. xvi., p. 460.]

[Footnote 463: _Recherches sur la Rotation du Soleil_, p. 12.]

[Footnote 464: Hale, _Astr. and Astrophysics_, vol. xi., p. 814.]

[Footnote 465: _Jour. Brit. Astr. a.s.s._, vol. i., p. 177.]

[Footnote 466: _Comptes Rendus_, t. lxxv., p. 1664; _Revue Scientifique_, t. v., p. 359 (1883). Mr. Herbert Spencer had already (in _The Reader_, Feb. 25, 1865) put forward an opinion that spots were of the nature of "cyclonic clouds."]

[Footnote 467: _The Sun_, p. 174. For Faye's answer to the objection, see _Comptes Rendus_, t. xcv., p. 1310.]

[Footnote 468: A revised edition appeared in 1897.]

[Footnote 469: _Astr. and Astrophysics_, vol. xii., p. 832.]

[Footnote 470: _Proc. Roy. Soc._, No. 244.]

[Footnote 471: _Astr. Nach._, No. 3,146; _Astr. and Astrophysics_, vol.

xii., pp. 419, 736.]

[Footnote 472: _Sirius_, Sept., 1893; _ibid._, vol. xxiii., p. 97; _Astrophy. Jour._, vol. i., p. 112 (Wilczynski), p. 178 (Keeler); vol.

ii., p. 73 (Hale).]

[Footnote 473: _Month. Not._, vol. xx., p. 13.]

[Footnote 474: _Ibid._, p. 15.]

[Footnote 475: _Am. Jour._, vol. xxix. (2nd series), pp. 94, 95.]

[Footnote 476: The magnetic disturbance took place at 11.15 A.M., three minutes before the solar blaze compelled the attention of Carrington.]

[Footnote 477: _Phil. Trans._, vol. cli., p. 428.]

[Footnote 478: Maunder, _Journal Brit. Astr. a.s.s._, vol. ii., p. 386; Miss E. Brown, _Ibid._, p. 210; Month. Not., vol. lii., p. 354.]

[Footnote 479: _Observatory_, vol. xxi., p. 387; Maunder, _Knowledge_, vol. xxi., p. 228; Fenyi, _Astroph. Jour._, vol. x., p. 333.]

[Footnote 480: _Ibid._, p. 336; W. Anderson, Observatory, vol. xxii., p.

196.]

[Footnote 481: _Proc. Roy. Society_, vol. lii., p. 307; Rev. W.

Sidgreaves, _Mem. R. A. S._, vol. liv., p. 85.]

[Footnote 482: _Report on Solar and Terrestrial Magnetism_, Washington, 1898, p. 27.]

[Footnote 483: _Astr. and Astrophysics_, vol. xi., p. 611.]

[Footnote 484: _Ibid._, p. 819 (Sidgreaves).]

[Footnote 485: See J. Rand Cap.r.o.n, _Phil. Mag._, vol. xv., p. 318.]

[Footnote 486: _Mittheilungen uber die Sonnenflecken_, No. ix., _Vierteljahrsschrift der Naturforschenden Gesellschaft in Zurich_, Jahrgang 4.]