d of time.

FOOTNOTES:

[Footnote 1369: _Report Brit. Assoc._, 1868, p. 166. Rutherfurd gave a
rudimentary sketch of a classification of the kind in December, 1862,
but based on imperfect observation. See _Am. Jour. of Sc._, vol. xxxv.,
p. 77.]

[Footnote 1370: _Publicationem_, Potsdam, No. 14, 1884, p. 31.]

[Footnote 1371: Von Konkoly _once_ derived from a slow-moving meteor a
hydro-carbon spectrum. A. S. Herschel, _Nature_, vol. xxiv., p. 507.]

[Footnote 1372: _Phil. Trans._, vol. cliv., p. 429.]

[Footnote 1373: _Am. Jour. of Sc._, vol. xix., p. 467.]

[Footnote 1374: _Photom. Unters._, p. 243.]

[Footnote 1375: _Spectre Solaire_, p. 38.]

[Footnote 1376: Mr. J. Birmingham, in the Introduction to his Catalogue
of Red Stars, adduced sundry instances of colour-change in a direction
the opposite to that assumed by Zoellner to be the inevitable result of
time. _Trans. R. Irish Acad._, vol. xxvi., p. 251. A learned discussion
by Dr. T. J. J. See, moreover, enforces the belief that Sirius was
absolutely _red_ eighteen hundred years ago. _Astr. and Astroph._, vol.
xi., p. 269.]

[Footnote 1377: _Phil. Trans.,_ vol. clxiv., p. 492.]

[Footnote 1378: _Astr. Nach._, No. 2,000.]

[Footnote 1379: _Proc. Roy. Soc._, vols. xvi., p. 31; xvii., p. 48.]

[Footnote 1380: _Annalen der Physik_, Bd. xx., p. 155.]

[Footnote 1381: _Ibid._, p. 153.]

[Footnote 1382: _Knowledge_, vol. xiv., p. 101.]

[Footnote 1383: _Meteoritic Hypothesis_, p. 380.]

[Footnote 1384: _Phil. Trans._, vol. cxci. A., p. 128; _Spectra of
Southern Stars_, p. 3.]

[Footnote 1385: See the author's _System of the Stars_, p. 84.]

[Footnote 1386: A designation applied by Sir Norman Lockyer to
third-type stars.]

[Footnote 1387: See _ante_, p. 198.]

[Footnote 1388: _Bothkamp Beobachtungen_, Heft ii., p. 146.]

[Footnote 1389: _Astr. Nach._, No. 2,539.]

[Footnote 1390: _Ibid._, No. 2,548; _Observatory_, vol. vi., p. 332.]

[Footnote 1391: _Month. Not._, vol. xlvii., p. 92.]

[Footnote 1392: _Publ. Astr. Pac. Soc._, vol. i., p. 80; _Observatory_,
vol. xiii., p. 46.]

[Footnote 1393: _Lockyer, Proc. Roy. Soc._, vol. lvii., p. 173.]

[Footnote 1394: _Astr. Nach._, No. 3,129.]

[Footnote 1395: _Month. Not._, vol. lix., p. 505.]

[Footnote 1396: _Astr. Nach._, No. 2,581.]

[Footnote 1397: _Ibid._, Nos. 2,651-2.]

[Footnote 1398: _Ibid._, No. 3,051; _Astr. and Astrophysics_, vol. xi.,
p. 25; Belopolsky, _Astr. Nach._, No. 3,129.]