rfections, the possibilities of youth. It promises everything; it
has already performed much; it will doubtless perform much more. The
means at its disposal are vast and are being daily augmented. What has
so far been secured by them it must now be our task to extricate from
more doubtful surroundings and place in due order before our readers.

FOOTNOTES:

[Footnote 347: Wolf, _Gesch. der Astr._, p. 655.]

[Footnote 348: Manuel Johnson, _Mem. R.A.S._, vol. xxvi., p. 197.]

[Footnote 349: _Astronomie Theorique et Pratique_, t. iii., p. 20.]

[Footnote 350: Wolf, _Gesch. der Astr._, p. 654.]

[Footnote 351: _Month. Not._, vol. xvii., p. 241.]

[Footnote 352: _Mem. R.A.S._, vol. xxvi., p. 200.]

[Footnote 353: _Astr. Nach._, No. 495.]

[Footnote 354: Gehler's _Physikalisches Woerterbuch_, art.
_Sonnenflecken_, p. 851.]

[Footnote 355: _Zweite Abth._, p. 401.]

[Footnote 356: _Annalen der Physik_ (Poggendorff's), Bd. lxxxiv., p.
580.]

[Footnote 357: _Phil. Trans._, vol. cxlii., p. 103.]

[Footnote 358: _Mittheilungen der Naturforschenden Gesellschaft_, 1852,
p. 183.]

[Footnote 359: _Archives des Sciences_, t. xxi., p. 194.]

[Footnote 360: _Neue Untersuchungen, Mitth. Naturf. Ges._, 1852, p.
249.]

[Footnote 361: _Phil. Trans._, vol. xci., p. 316.]

[Footnote 362: Evidence of an eleven-yearly fluctuation in the price of
food-grains in India was collected some years ago by Mr. Frederick
Chambers. _Nature_, vol. xxxiv., p. 100.]

[Footnote 363: _Bibl. Un. de Geneve_, t. li., p. 336.]

[Footnote 364: _Neue Untersuchungen_, p. 269.]

[Footnote 365: _Die Sonne und ihre Flecken_, p. 30. Arago was the first
who attempted to decide the question by keeping, through a series of
years, a parallel register of sun-spots and weather; but the data
regarding the solar condition amassed at the Paris Observatory from 1822
to 1830 were not sufficiently precise to support any inference.]

[Footnote 366: _Phil. Trans._, vol. xxix., p. 421.]

[Footnote 367: _Ibid._, vols. cxliii., p. 558, cxlvi., p. 505.]

[Footnote 368: _Observations on Light and Colours_, p. 35.]

[Footnote 369: _Phil. Trans._, vol. lxxv., p. 190.]

[Footnote 370: _Denkschriften_ (Munich. Ac. of Sc.), 1814, 1815, Bd. v.,
p. 197.]

[Footnote 371: _Edinburgh Journal of Science_, vol. v., p. 77. See also
_Phil. Mag._, Feb., 1834, vol. iv., p. 112.]

[Footnote 372: _Ed. Phil. Trans.,_ vol. xxi., p. 411.]

[Footnote 373: _On the Absorption of